I would love to see the difference between a 671, 871, 1471 all on the same engine running the same boost to see which one is more efficient, thought it would be a cool test 👍
400 ci. Small Block with this 6-71 blower. You got displacement in a small package, but will have a ton of power and torque. Best of both worlds. Sitting in either a 55 Chevy or 57 Step-side 😎
Lucas Mullins : I like them because you can tell your Ford and Mopar friends your GM car comes equiped with a dual quad "7 litre" or "426". ( Plus whatever good GM engine you got underneath...) Six times 71 is exactly that. They make bulk boost if done right. Dont forget your Rootes my friend....
Ive got another kind of super charger...an industrial blower from the Greggs Coffee Company where it was used to blow beans up to the second floor...My 6/71 would go on the left hand side of a Ak Miller style 250 Ford log head six in line with three Holley Sniper BBDs gettingfeed 426 cubes per rev on a 1:1 ratio. The way GMC put the blower on the 671 2 stroke is perfect for s non cross flow six. Plenty if room, and the stock alloy inlet can get polishrd and two big oval section 3 by 4 " dianeter silicone jointed tubes can feed a three carb hat to an almost port EFi intake on the cast iron log. Henry would not be pleased but Alfred P Sloan would smile alot uf he wad still alive.
Michael Israel .MI word! I just got married in 1990.South Island New Zealand. Out side the house one Saturday Morning, there was John Abbots Yellow 1955 Chevy Bel Air. BBC 454 with GMC 6-71 blower in the Woolworths/ Countdown Mailer Street Dunedin Car Park. Ive been sober and a Chevy Loving Ford guy for 30 years. Ill never forget the sound of my first Rootes 71 series blower. This blower one the War in the Pacific in the Jimmy 3/71 diesel boats, but it one the war in my heart in 1990. Never a truer word spoken MI.
I can appreciate that most folks want to see the big numbers The power under the curve is the big block magic Nobody ever talks about torque production Or the fact that hp is a mathematical equation. I love tour vids Keep it up brother
Building a 1978 280z with a 496 N/A big block all of your videos has really helped me out on making choices for the build and I would also choose the 496 with this blower
@@austindoud273 depending on what pulley you use because a rotary engine will outperform the supercharger. I've seen peripheral port 13b engines revving to 13,500rpm on a 1250cfm dominator. They will turn that supercharger easily but it does depend on the configuration of the pulley to turn it.
I'm running a 6-71 on my inline 292 going in my 53 Chevy 1/2 ton pickup. 6 stage dry sump, Electromotive direct fire ignition. duel 650 dp carbs. 12 port Falconer cross flow head. TKO 600 trans Frankland quick change rear end with Gleason torson dif.
Uhh... I'm a little disappointed to not see a couple videos on your YT about this.. lol.. that sounds insanely bad ass, and im sure i'm not alone in saying - make some content!
You should tape that message about your build/combination to your refrigerator or coffeemaker. Talk about setting the mood for the day! Your wife could wake up on the wrong side of the bed, you notice that your losing your hair, the dog could have got in the trash, and some kid put a M80 in your mailbox, and after reading your note you think, Man... today is going to be a good day 🤘
Great video! Thanks for the hard work! My 6-71 engine? Easy! My 1957 392 hemi! A little nitro and a slingshot dragster! I'm building a bug catcher injected, race stripped TBS 10-71 on a 572 Keith Black hemi. 8:0 CR, 1200hp on pump gas (These engines will make around 1000hp N/A with 12.5:1) it will have 2 stage water methanol injection at around 12psi boost. 280*, 290* at .050 duration on a 112 ctr .645 lift mech roller cam. NO builder of these engines recommend more than 8.5:1 even when I begged for 9.0! This was for durability, they said more boost was better than more CR. I'm building it, when the 18+mo wait for ceramic coated pistons ends! Blowers make this power level much more streetable than N/A. take care of it and your grandkids can use that hard anodized blower on ANYTHING!
Have a 77 F250 highboy 4X4. I am just going to throw a 6.0 LS and a 4L80 in it if I ever end up doing anything with it just to piss people off for my amusement.
Forged ls2 or ls3 with a tall bottom intake from Australia a carbon fiber 4 blade big and ugly hat on alchohol in 70 through 78 Nova small tire leafspring car! Yes and thank you
The 6-71’s boost curve began to curve at around 4 after running 11 percent under at its latest analysis.When it reaches 3,300 rpm, it reaches 8 psi at 2,700 rpm.At 6,400rpm the engine has a max performance of 3 psi.It can be rated with systolic power of 602 horsepower (hp) at a max speed of 6,400rpm and output of 551 pounds per square foot (lbs) at a maximum speed of 4,900rpm.
Even though its a discussion thats over 50 years old now, I bet between the vast dyno records you have and the way you explain things, it would be interesting to see the differencess in the power/torque curves of a sbc, bbc, and LS that all have close to the same peak horsepower numbers.
Excellent work as always Richard , thanks again . I would start with good cnc heads on any serious combination, the Blueprint 540 is a good example of Chinese heads on a big motor and the 496 has offshore castings as well but at least they were CNC ported
Love to see it on a 500 cubic inch Mopar. Thats the motor I need to build for my next project. Would love to see some power combinations and camshaft set ups for a nasty street strip combo. Also running it on a 500 cubic inch ford would be great to see.
Id put it on what I have which is a 330hp 350ci Chevy crate in my 71 vette. I want to go big block on the car someday but this would definitely hold me over until then. haha
426 hemi in 1970 challenger,,but would like to see on new jen hemis to.loved the piece on the turbo 5.7 ya did ,have the perfect little dakota in mind.
Just a idea for a future test . Chev 366 or 427 tall deck truck block. What power numbers with stock engine with after market , cam, intake, headers, ECT.
I'd put it on a 383 small block, Holley Terminator X w/dual throttle bodies on top, backed with a TH400 w/Gear Vendors od/splitter tailshaft and stick it into my 65 c10 shortbed fleetside.
A low rpm build for daily driver cruiser 2nd gen camaro. 8-71 or eddy enforcer on a dart block, 4.155" bore ,9.025", 5.85" H beam rod, 3.25" forged crank. 1.55" blower cup dish Mahle piston, TFS super 23 175cc heads with 72cc chambers or different sizings, blower seal head gaskets, XR252HR style cam or other tiny retro roller like the XR264HR although target idle is a low 450 rpm. mated to a custom 7 speed close ratio automatic and tight blower onverter, with lower than stock stall, custom siphon fuel system, with more throttle more jets that develop same atomization consistently, Maybe use a smaller blower? Want overdriven low rpm engine at medium high boost blower with adjustable bleed off valve boost conroller. Daily driver with slalom equal track width tires 15x12 with p295 BFG's and full flare arches. Roll bar, X braces, front and rear bucket seats jegs or summit. Car candy pearl metallic medium charcoal grey with giant dry apply silver, black, grey metal flake. inside and out every part and interior panels and sheet metal bottom of car etc. Entire engine and every part bolted to engine is Ceramic chrome, aluminum, or ceramic grey and also exhaust to double barrel dual tips. 60 gallon gas tank. truck arm rear suspension and watts link, strut front coil over with rack and pinion. Dual master cylinders manual with mechanical assisted brake assembly and foot box. Engine set back. equal length headers, flowmaster 50 series quiet mufflers 3" exhaust. rear diffuser front air dam, transam fiberglass rear bumper cover, custom tailight panel, all led lighting, night vision and infra red internal window screens, Entire car sprayed max clr epoxy clear UV protect with 10% silica mix also the wheels inside and out, the driveshaft body color , the rear end as well as everything body color even the wheels.. Aluminum wheels everything finely balanced.
I have a 6-71 blower that I'm going to install on my 454 with Bill Jenkins merlin heads. Want to see how mush horse power it will produce. Going in a 67 Firebird.
I am considering a 671for my stroked 409(482) W head engine. It has a stock GM forged 454 crank, Scat rods, Edelbrock aluminum heads, Super Lobes (Dema Elgin) flat tappet cam and Ross pistons. It currently is using two Edelbrock 4V carbs with a 9.5:1 cr. It sits in my 1962 Bel Air 2-door post car with 4-speed M20 gearbox. A Ford 9” rear end and limited slip diff. I think this car would greatly benefit from a 671.
Hi Richard. Awesome channel!! Have you ever come across a 308 Holden ? Really popular here in NZ and Australia where they were built. Keep up the great work!!
Things I would like to know and have never seen any test on. With a turbo or a centrifugal super charger: what is the effect of different size/kind of air cleaner and what happens when you use different kinds of air inlet pipes (straight, 90 degrees and 180 degrees. )
Hi Richard I’d love to see a 6.0 Ls stroked to a 418 or so with your preferred choice of parts tested in the same way including the 6/71 and 8/71 and also carby verse injected….for your followers here is Australia 🇦🇺 cheers cob
my dad just built a sbc 383 low compression and dynod it on 110 and made just over 630 at 11psi before being fine tuned. they dyno didnt wanna run it to 6500 but it was climbing at 6200 pretty good still. its in a 70 camaro now one of the pulls i taped but not the final pull its on my page
Easy to decide what to build for this one. I have a really similarly spec'd 496 already bulit, now which to drop it in, my 67 Caprice that has a L88 spec'd 427 with a tunnel ram & TKO 5 spd or my '91 R2500 Suburban that the 496 was originally slated for?
A 6-71 on a 351W would bridge the gap between the SBC and LS engines, I'm a GM guy by preference but I'm not biased. I like a lot of different engines, a stout 408W is one of my favorites and can be had on a budget.
I would love to see that 496 with the 6-71 or a 8-71 running 11psi pulley on e85. That is what my father in law wants to do to his chevy 2 nova lol and yes its a M22 rock crusher transmission. With a 3.73 rear. I think his blower is a 8-71 on it because he told me it made 1200whp back in the early 90s with it. He told me it scared the crap out of him because he's a ol'skool street racer and retired the car lol
The LS would be nice in a factory 5 '33 Ford truck. Snap-on and Joey Logano did a good feature with that car. Another option would be to use the 496 in a '72 Nova.
It would have been cool to do this test with the same blower ratios to show how cramming the same amount of air into a small engine can make the same power as a big engine minus the efficiency difference. Of course I think this would mean you would have like 30 psi on the 350 and 2 on the 540.
I've been busy building up a 572 10-71 blown hemi. If you think about it the engine is an attachment to the blower! The stripped blower as a positive displacement pump that directly regulates how much A/F is burned (power) The engine just converts that energy into rotation, more or less efficiently, larger more efficient motor, more hp at lower rpm (HP is just torque x speed, that's why ALL engines make the same torque as HP at 5250 rpm) this is because of much less pumping losses. But still surprisingly close if similar breathing abilities in port cfm vs ci. It always amused me that the turbo guys push "efficiency" while roots types seem to make more power with much less boost! Yes, it's easier to get more from a turbo but at a loss of throttle response. I've yet to see a 71 series roots supercharger failure take the engine with it, saw several turbos do it tho! Saw several engine failures take turbos but only very rarely in non nitro applications (someone didn't read the manual!) take a roots out. I consider the blower a lifelong investment I can rebuild myself because I WILL be running an air cleaner! Get tired of the hemi, put it on a loose motor home 440 and go tens!
Richard Holdener yes sir, I believe class record is 6.05@ 226 with a 6-71 at 1800lbs with a 2 speed trans. TBS XR1 are one of the good ones that can make that kind of power
I want to put a 671 on my 454 but, unless I'm missing something (nostalgia?), I could get a functional turbo setup for the price of a bare blower housing.
Just get the damn blower. You can't have something for nothing, and you can't get what you pay for. I could have turbo'd my 4.3 vortec instead of get an LS. When I hit the start button, I never think "Aw man, I could have had a turbo 4.3 for sooo much less money." The minute you fire up a cammed supercharged big block, you'll forget about what it cost. You'll feel invincible.
@@Dr_Xyzt I'm Swapping a gen 6 454 into a 95 Stepside with a 5 speed manual. It's waiting on a cam and other stuff before it goes in so it's already a big step up from the tired sbc that it came with. I got way to many projects and once I get one or two sold I'll probably splurge on something like that.
Only engine that comes to mind for a roots blower is a hemi. What I'd love to see is a gen 3 6.4 hemi with a 10/71 roots blower and put it into a 4x4 first gen ram d100
Honestly I think I would run the most mild combo. Would be easy to get parts if something breaks and I wouldn't feel bad if I trash the engine because its just a smogger 350. Also with the tame characteristics it would be sooo street-able. You might even take it on the highway if you had some overdrive too.
I want to mount one of these to a 337 flathead Ford that's been bored and stroked to 400ci, with something similar to Ardun cylinder heads on it. The most power a flathead Ford ever made was 700HP, but I think that setup would surpass it with ease.
Richard, How come You did not use a stock 454, The Reason I,m asking A friend of Mine, Just picked up a 20,000 mile 454 from motor home, all stock, Bolted on a 671, 5,5 lb of boost, Made over 600 hp,, My Chevelle , had,s 671, But i have over 20 thousand invested makes over 700 hp and that's 20 under, Richard only reason I,m, People that can only afford so much, That want's hp can, With a blower That's why I wish you showed one, Love your Video's Keep them Coming, In my 60.s its nice to see all the new way,s of making hp. GOD BLESS
@@richardholdener1727 Hi Richard, I was wrong, He Did put on a set of used Edelbrock heads that were painted And a cam, Stock bottom, And it made 598 hp 554 foot, But in my defence, I,m blind i one eye and old, LOL And I did not know that my Brother remembered seeing that video
Id like to know if it would be worth putting a 6-71 on my basicly stock 308 single holly 650 square bore its in a 1976 holden utility bit like the American chevy el Comino. Its cammed and 60 thou over. Thoughts.?
I like the street sleeper attitude, so it would have to be on something that could be fit under the hood. How about on a Chrysler slant-6? Or a GMC 302. Or just plain weird; how about on a Mazda rotary? Or a little offbeat; on a Pontiac Grand Prix GTP with the transversely mounted 5.3. People would stare seeing the blower sticking through the hood sideways.
My only complaint about any motor part popping through the good is most cars like my c4 Corvettes, the motor sits off to the passenger side an inch or more in some cars. Then its off center and looks odd in my opinion. It would be cool if they made a manifold with the correct offset to keep that beauty of a 671 centered in your hood. I've seen a lot of guys put scoops or blowers or whatever on the motor only to bummed when it wasn't centered on the hood. Hint hint to the manufacturer's...
hello i have a 74 corvette with 300hp i want a blower can you tell me everything i need just to get that look and sound i dont care of massive power just all i need kit wise please thank you
I would like to see a 871 blower on top of a 555 ci big block chevy cast iron head with a mechanical fuel injection and e85 just to see if you can get it to 1000 up that is what I am putting in my 55 chevy 4 door
Put the blower on a 460 in a fox body. Then again the 460 build you did before made more power than this blower round and without the blower. I guess having the bucks for a well built normally aspirated engine would be good. Stroker kit with aluminum heads and a roller cam would make anything move along.
I put this on a 406 sbc with the bottom half of block filled with stock cast crank, H beam rods, forged pistons, and aluminum heads. Running it 1:1 on pump gas and going to install a 💯 shot on top of that just for fun.
I really enjoy your vids. I have a 565ci big chevy being built for my 73 chevy k20 4x4 , engine will have AFR 335 heads , bds 10-71 , bullet racing hyd roller cam 4-7 swap .680 lift 255/265 @.050 112 lsa , boost target is 8lbs for premium pump fuel. Static cr is 8.5:1....what are your thoughts on this..?
I would love to see the difference between a 671, 871, 1471 all on the same engine running the same boost to see which one is more efficient, thought it would be a cool test 👍
Let's make this a 14-71 vs the world. Come Richard we believe in you!
went down to the comments to say the same exact thing
Yes!!!
Thanks sooooooo much Richard, you are the best. Love from Australia
400 ci. Small Block with this 6-71 blower. You got displacement in a small package, but will have a ton of power and torque. Best of both worlds. Sitting in either a 55 Chevy or 57 Step-side 😎
Reason to own a 6-71 it's just so damn pretty! Might have to put one on the 51 Bel Air
Lucas Mullins : I like them because you can tell your Ford and Mopar friends your GM car comes equiped with a dual quad "7 litre" or "426". ( Plus whatever good GM engine you got underneath...) Six times 71 is exactly that. They make bulk boost if done right. Dont forget your Rootes my friend....
Ive got another kind of super charger...an industrial blower from the Greggs Coffee Company where it was used to blow beans up to the second floor...My 6/71 would go on the left hand side of a Ak Miller style 250 Ford log head six in line with three Holley Sniper BBDs gettingfeed 426 cubes per rev on a 1:1 ratio. The way GMC put the blower on the 671 2 stroke is perfect for s non cross flow six. Plenty if room, and the stock alloy inlet can get polishrd and two big oval section 3 by 4 " dianeter silicone jointed tubes can feed a three carb hat to an almost port EFi intake on the cast iron log. Henry would not be pleased but Alfred P Sloan would smile alot uf he wad still alive.
@@deanstevenson6527 Nothing sexier than a Bel Air with a blower sticking out of the hood.
Michael Israel .MI word! I just got married in 1990.South Island New Zealand. Out side the house one Saturday Morning, there was John Abbots Yellow 1955 Chevy Bel Air. BBC 454 with GMC 6-71 blower in the Woolworths/ Countdown Mailer Street Dunedin Car Park. Ive been sober and a Chevy Loving Ford guy for 30 years. Ill never forget the sound of my first Rootes 71 series blower. This blower one the War in the Pacific in the Jimmy 3/71 diesel boats, but it one the war in my heart in 1990. Never a truer word spoken MI.
It would be nice to see some build combos for old school 396 bbc
I can appreciate that most folks want to see the big numbers
The power under the curve is the big block magic
Nobody ever talks about torque production
Or the fact that hp is a mathematical equation.
I love tour vids
Keep it up brother
Back in the late 70's you'd see guys with blown 350's saying they make 700hp... and now we know.
Building a 1978 280z with a 496 N/A big block all of your videos has really helped me out on making choices for the build and I would also choose the 496 with this blower
I want to see a 671 on a rotary that sounds interesting
On holley intake 13b
I honestly don't know if a 13b could turn it
@@austindoud273 depending on what pulley you use because a rotary engine will outperform the supercharger. I've seen peripheral port 13b engines revving to 13,500rpm on a 1250cfm dominator. They will turn that supercharger easily but it does depend on the configuration of the pulley to turn it.
3 rotor compound boost.
@@rob-vz4wt so you want to see a 20b running on a 6-71 or 8-71? Heck why not do a 4 rotor 26b from Rob Dahm lol
I'm running a 6-71 on my inline 292 going in my 53 Chevy 1/2 ton pickup. 6 stage dry sump, Electromotive direct fire ignition. duel 650 dp carbs. 12 port Falconer cross flow head. TKO 600 trans Frankland quick change rear end with Gleason torson dif.
Uhh... I'm a little disappointed to not see a couple videos on your YT about this.. lol.. that sounds insanely bad ass, and im sure i'm not alone in saying - make some content!
You should tape that message about your build/combination to your refrigerator or coffeemaker. Talk about setting the mood for the day! Your wife could wake up on the wrong side of the bed, you notice that your losing your hair, the dog could have got in the trash, and some kid put a M80 in your mailbox, and after reading your note you think, Man... today is going to be a good day 🤘
@@kevinwest3689 No wife no kids that's how I get away with it. Just me and my 2 Basset Hounds.
that sounds awesome
@@richardholdener1727 Thanks for the advice to move from my 4-71 to a 6-71. Now I need a home for the 4-71.
Awesome! Love the LS test. Mix of old school and new school.
thanks for this. I was wondering what to expect when adding a blower.
Great video! Thanks for the hard work! My 6-71 engine? Easy! My 1957 392 hemi! A little nitro and a slingshot dragster! I'm building a bug catcher injected, race stripped TBS 10-71 on a 572 Keith Black hemi. 8:0 CR, 1200hp on pump gas (These engines will make around 1000hp N/A with 12.5:1) it will have 2 stage water methanol injection at around 12psi boost. 280*, 290* at .050 duration on a 112 ctr .645 lift mech roller cam. NO builder of these engines recommend more than 8.5:1 even when I begged for 9.0! This was for durability, they said more boost was better than more CR. I'm building it, when the 18+mo wait for ceramic coated pistons ends! Blowers make this power level much more streetable than N/A. take care of it and your grandkids can use that hard anodized blower on ANYTHING!
good luck
BBF baby 460, I'd love to either duplicate a "Bigfoot" build or put it in a early 50s ford pickup!
Have a 77 F250 highboy 4X4. I am just going to throw a 6.0 LS and a 4L80 in it if I ever end up doing anything with it just to piss people off for my amusement.
Forged ls2 or ls3 with a tall bottom intake from Australia a carbon fiber 4 blade big and ugly hat on alchohol in 70 through 78 Nova small tire leafspring car! Yes and thank you
The 6-71’s boost curve began to curve at around 4 after running 11 percent under at its latest analysis.When it reaches 3,300 rpm, it reaches 8 psi at 2,700 rpm.At 6,400rpm the engine has a max performance of 3 psi.It can be rated with systolic power of 602 horsepower (hp) at a max speed of 6,400rpm and output of 551 pounds per square foot (lbs) at a maximum speed of 4,900rpm.
Would love to see you do this with a 283 SBC
❤️Westech's Gladiator 350❤️ 527hp from a 350hp ZZ4 with a off the shelf head and cam swap blew my mind 20 years ago.
The small block crate motor would have been cool to change just the cam and then run the blower,no other mods.3rd gen Firebird/Camaro.
Even though its a discussion thats over 50 years old now, I bet between the vast dyno records you have and the way you explain things, it would be interesting to see the differencess in the power/torque curves of a sbc, bbc, and LS that all have close to the same peak horsepower numbers.
Glad to see the Gen 6 back in the testing.
Excellent work as always Richard , thanks again . I would start with good cnc heads on any serious combination, the Blueprint 540 is a good example of Chinese heads on a big motor and the 496 has offshore castings as well but at least they were CNC ported
Love to see it on a 500 cubic inch Mopar. Thats the motor I need to build for my next project. Would love to see some power combinations and camshaft set ups for a nasty street strip combo. Also running it on a 500 cubic inch ford would be great to see.
On my 388 stroker sitting inside my very rusty '72 Nova that's been sitting dormant since I got out of the Navy went to college and had kids.
Buddy has a 6-71 on a 468 in a 66 Chevy2. He built it about 20 years ago and it's still running great. It's a driver, not a trailer queen.
Maybe do a video comparing the "stroked" BBC 496 vs the "bored" BBC 502
Great suggestion I think!
also 572. 632 is it a Ford engine or GM ? I forgot lol
@@Silkmaster4200 632 Gm ;- )
Id put it on what I have which is a 330hp 350ci Chevy crate in my 71 vette. I want to go big block on the car someday but this would definitely hold me over until then. haha
426 hemi in 1970 challenger,,but would like to see on new jen hemis to.loved the piece on the turbo 5.7 ya did ,have the perfect little dakota in mind.
Cool vid , great tests. Blowers Rule 😎🏁
So you’re saying I should put a 6-71 on my already cammed chevy avalanche? 😏🤔
yes
no
Why would you put a 6-71 on anything when you can get an 8-71 for about the same money?
put an 8-71.
That 6.71 on the LS would be a helluva combo in my 87 Z28 Camaro !
Just a idea for a future test . Chev 366 or 427 tall deck truck block. What power numbers with stock engine with after market , cam, intake, headers, ECT.
A 462 MEL engine and install it into a 1960 Ford Falcon.
My daughter's '69 Plymouth GTX with motor home 440. purple camshaft (.484) , '66 ported heads.
Love it. I would be going 496 and put it in my 93 s10
Awesome video!
I’d love to find one to put in my dads 83 ss Monte Carlo that I now own . Rip pops
Not one dyno video here .....dude just loves the sound of his own voice.🤯🤯🤯
I'd put it on a 383 small block, Holley Terminator X w/dual throttle bodies on top, backed with a TH400 w/Gear Vendors od/splitter tailshaft and stick it into my 65 c10 shortbed fleetside.
Loving the big blocks lately but if have to go with the blown 383 ls and make it fit in my 05 suburban!
No dislikes. You broke the internet
That 496 with a 6 or 871 would be epic in my 86 Monte SS. 🤘🏻 maybe a stout 383 small block and a 871.
8-71 is 4 digit territory
A low rpm build for daily driver cruiser 2nd gen camaro. 8-71 or eddy enforcer on a dart block, 4.155" bore ,9.025", 5.85" H beam rod, 3.25" forged crank. 1.55" blower cup dish Mahle piston, TFS super 23 175cc heads with 72cc chambers or different sizings, blower seal head gaskets, XR252HR style cam or other tiny retro roller like the XR264HR although target idle is a low 450 rpm. mated to a custom 7 speed close ratio automatic and tight blower onverter, with lower than stock stall, custom siphon fuel system, with more throttle more jets that develop same atomization consistently, Maybe use a smaller blower? Want overdriven low rpm engine at medium high boost blower with adjustable bleed off valve boost conroller. Daily driver with slalom equal track width tires 15x12 with p295 BFG's and full flare arches. Roll bar, X braces, front and rear bucket seats jegs or summit. Car candy pearl metallic medium charcoal grey with giant dry apply silver, black, grey metal flake. inside and out every part and interior panels and sheet metal bottom of car etc. Entire engine and every part bolted to engine is Ceramic chrome, aluminum, or ceramic grey and also exhaust to double barrel dual tips. 60 gallon gas tank. truck arm rear suspension and watts link, strut front coil over with rack and pinion. Dual master cylinders manual with mechanical assisted brake assembly and foot box. Engine set back. equal length headers, flowmaster 50 series quiet mufflers 3" exhaust. rear diffuser front air dam, transam fiberglass rear bumper cover, custom tailight panel, all led lighting, night vision and infra red internal window screens, Entire car sprayed max clr epoxy clear UV protect with 10% silica mix also the wheels inside and out, the driveshaft body color , the rear end as well as everything body color even the wheels.. Aluminum wheels everything finely balanced.
Thanks for your hard work.
I have a 6-71 blower that I'm going to install on my 454 with Bill Jenkins merlin heads. Want to see how mush horse power it will produce. Going in a 67 Firebird.
Id put that 671 on my stroked sbc in my 23 T-bucket altered. That would be a fun ride
I am considering a 671for my stroked 409(482) W head engine. It has a stock GM forged 454 crank, Scat rods, Edelbrock aluminum heads, Super Lobes (Dema Elgin) flat tappet cam and Ross pistons. It currently is using two Edelbrock 4V carbs with a 9.5:1 cr. It sits in my 1962 Bel Air 2-door post car with 4-speed M20 gearbox. A Ford 9” rear end and limited slip diff. I think this car would greatly benefit from a 671.
Hi Richard. Awesome channel!! Have you ever come across a 308 Holden ? Really popular here in NZ and Australia where they were built.
Keep up the great work!!
Very cool test 👍👍
What's cooler than a 6-71 sticking through the hood as you drive around on the street? A 14-71 Injected Screw Blower!
Great video
I want that 6-71 on my 383 original small block Chevy and in my 86 Iroc Z! Think that would be a good combo.
Things I would like to know and have never seen any test on. With a turbo or a centrifugal super charger: what is the effect of different size/kind of air cleaner and what happens when you use different kinds of air inlet pipes (straight, 90 degrees and 180 degrees. )
I would install the blower on a 9.7:1 destroked LS with a 5spd, stuffed into a Opel GT :)
Now that's what I want to see.
Hi Richard I’d love to see a 6.0 Ls stroked to a 418 or so with your preferred choice of parts tested in the same way including the 6/71 and 8/71 and also carby verse injected….for your followers here is Australia 🇦🇺 cheers cob
my dad just built a sbc 383 low compression and dynod it on 110 and made just over 630 at 11psi before being fine tuned. they dyno didnt wanna run it to 6500 but it was climbing at 6200 pretty good still. its in a 70 camaro now one of the pulls i taped but not the final pull its on my page
I have a 6-71 v mount on my home made roadster with a 350 sbc back yard motor.
Easy to decide what to build for this one. I have a really similarly spec'd 496 already bulit, now which to drop it in, my 67 Caprice that has a L88 spec'd 427 with a tunnel ram & TKO 5 spd or my '91 R2500 Suburban that the 496 was originally slated for?
A 6-71 on a 351W would bridge the gap between the SBC and LS engines, I'm a GM guy by preference but I'm not biased. I like a lot of different engines, a stout 408W is one of my favorites and can be had on a budget.
That supercharger on the small block is a lot of $$$ just for an oooh ahhh factor
I would love to see that 496 with the 6-71 or a 8-71 running 11psi pulley on e85. That is what my father in law wants to do to his chevy 2 nova lol and yes its a M22 rock crusher transmission. With a 3.73 rear. I think his blower is a 8-71 on it because he told me it made 1200whp back in the early 90s with it. He told me it scared the crap out of him because he's a ol'skool street racer and retired the car lol
Just when I was getting some sleep...
If you keep this up, I'll be single again
The LS would be nice in a factory 5 '33 Ford truck. Snap-on and Joey Logano did a good feature with that car.
Another option would be to use the 496 in a '72 Nova.
lol. The 496 would be much better.
Would love to see IAT before and after blower. Bet an after cooler would really add some power
its pretty cool with the carbs and low boost-even better with e85
It would have been cool to do this test with the same blower ratios to show how cramming the same amount of air into a small engine can make the same power as a big engine minus the efficiency difference. Of course I think this would mean you would have like 30 psi on the 350 and 2 on the 540.
I've been busy building up a 572 10-71 blown hemi. If you think about it the engine is an attachment to the blower! The stripped blower as a positive displacement pump that directly regulates how much A/F is burned (power) The engine just converts that energy into rotation, more or less efficiently, larger more efficient motor, more hp at lower rpm (HP is just torque x speed, that's why ALL engines make the same torque as HP at 5250 rpm) this is because of much less pumping losses. But still surprisingly close if similar breathing abilities in port cfm vs ci. It always amused me that the turbo guys push "efficiency" while roots types seem to make more power with much less boost! Yes, it's easier to get more from a turbo but at a loss of throttle response. I've yet to see a 71 series roots supercharger failure take the engine with it, saw several turbos do it tho! Saw several engine failures take turbos but only very rarely in non nitro applications (someone didn't read the manual!) take a roots out. I consider the blower a lifelong investment I can rebuild myself because I WILL be running an air cleaner! Get tired of the hemi, put it on a loose motor home 440 and go tens!
@RichardHoldener why does the file name on the 540 say 871 blower not 671?
it did-I labeled it wrong
138👍's up guys thanks again for taking the time for us all to see you in action
Big cam high cid LS in an off-road truck. I would love to see more roots LS action. LSA perhaps?
We run a 6-71 on our 481x Nostalgia A/Fuel car. Makes north of 1800hp has gone 6.3x at 220mph. Lots of things you can do to them!
a 6-71 making 1800?
Richard Holdener yes sir, I believe class record is 6.05@ 226 with a 6-71 at 1800lbs with a 2 speed trans. TBS XR1 are one of the good ones that can make that kind of power
I want to put a 671 on my 454 but, unless I'm missing something (nostalgia?), I could get a functional turbo setup for the price of a bare blower housing.
Just get the damn blower. You can't have something for nothing, and you can't get what you pay for.
I could have turbo'd my 4.3 vortec instead of get an LS. When I hit the start button, I never think "Aw man, I could have had a turbo 4.3 for sooo much less money."
The minute you fire up a cammed supercharged big block, you'll forget about what it cost. You'll feel invincible.
@@Dr_Xyzt I'm Swapping a gen 6 454 into a 95 Stepside with a 5 speed manual. It's waiting on a cam and other stuff before it goes in so it's already a big step up from the tired sbc that it came with. I got way to many projects and once I get one or two sold I'll probably splurge on something like that.
Only engine that comes to mind for a roots blower is a hemi. What I'd love to see is a gen 3 6.4 hemi with a 10/71 roots blower and put it into a 4x4 first gen ram d100
Honestly I think I would run the most mild combo. Would be easy to get parts if something breaks and I wouldn't feel bad if I trash the engine because its just a smogger 350. Also with the tame characteristics it would be sooo street-able. You might even take it on the highway if you had some overdrive too.
Hi there I would use the 496 and I would have it in my 1970 pro Street Nova
Why does the older videos of this and the dyno graphs show 8-71 and not 6-71. Which blower was used?
This would be fun in my 6.2l Gen1 Raptor!
I want to mount one of these to a 337 flathead Ford that's been bored and stroked to 400ci, with something similar to Ardun cylinder heads on it. The most power a flathead Ford ever made was 700HP, but I think that setup would surpass it with ease.
That would make for a very interesting time bomb
I would probably like to have that 496 in my s10 That would be nice that’s what I would use it for it would be a lot of fun
Richard, How come You did not use a stock 454, The Reason I,m asking A friend of Mine, Just picked up a 20,000 mile 454 from motor home, all stock, Bolted on a 671, 5,5 lb of boost, Made over 600 hp,, My Chevelle , had,s 671, But i have over 20 thousand invested makes over 700 hp and that's 20 under, Richard only reason I,m, People that can only afford so much, That want's hp can, With a blower That's why I wish you showed one, Love your Video's Keep them Coming, In my 60.s its nice to see all the new way,s of making hp. GOD BLESS
a stock 454 with 5.5 psi from a 6/71 doesn't make 600 hp
@@richardholdener1727 Richard He,s on youtube Showing it On dyno, Look for I found it A month ago, It say,a motor home motor
@@richardholdener1727 Hi Richard, I was wrong, He Did put on a set of used Edelbrock heads that were painted And a cam, Stock bottom, And it made 598 hp 554 foot, But in my defence, I,m blind i one eye and old, LOL And I did not know that my Brother remembered seeing that video
Id like to know if it would be worth putting a 6-71 on my basicly stock 308 single holly 650 square bore its in a 1976 holden utility bit like the American chevy el Comino. Its cammed and 60 thou over. Thoughts.?
I’d go for the crate motor 6-71 and put it in a 61 Corvette. Do a Day 3 car and drive it around like it’s the 70’s again.
I like the street sleeper attitude, so it would have to be on something that could be fit under the hood. How about on a Chrysler slant-6? Or a GMC 302. Or just plain weird; how about on a Mazda rotary? Or a little offbeat; on a Pontiac Grand Prix GTP with the transversely mounted 5.3. People would stare seeing the blower sticking through the hood sideways.
I would like to see the same blower on a 396 or 402 BBC, just to see what can be done with the under-appreciated engine.
Would love to see this on a bone stock 5.3.
My only complaint about any motor part popping through the good is most cars like my c4 Corvettes, the motor sits off to the passenger side an inch or more in some cars. Then its off center and looks odd in my opinion. It would be cool if they made a manifold with the correct offset to keep that beauty of a 671 centered in your hood. I've seen a lot of guys put scoops or blowers or whatever on the motor only to bummed when it wasn't centered on the hood. Hint hint to the manufacturer's...
Rich how about breaching the 2000 hp mark. I have some suggestions on doing that.
Bloodviking
hello i have a 74 corvette with 300hp i want a blower can you tell me everything i need just to get that look and sound i dont care of massive power just all i need kit wise please thank you
I would like to see a 871 blower on top of a 555 ci big block chevy cast iron head with a mechanical fuel injection and e85 just to see if you can get it to 1000 up that is what I am putting in my 55 chevy 4 door
I’d run a 6-71 on a 383 SBC in my 68 Camino... maybe even a stroked LS with EFI.
Why? The 496 kicked the crap out of all of them.
Put the blower on a 460 in a fox body. Then again the 460 build you did before made more power than this blower round and without the blower. I guess having the bucks for a well built normally aspirated engine would be good. Stroker kit with aluminum heads and a roller cam would make anything move along.
I would most definitely use that blower on a 454 and put it in my 48 Anglia.
Would look good on a V-drive drag boat
Great vid but we have not herd anything run in a few vids.
I'd like to see one swinging on a 455 Buick or Olds and a 510 FE. See if you can get them to make 700lbft and 600hp.
What about the lt platform i have an lt2 from a c8 and a 671 on it would be insane
I'd slap that aluminum goodness on a Poncho 455 and stuff it in a '71-'76 Trans Am.
I wanna see it on the 292 rich! Make it happen!!!! 😂
I put this on a 406 sbc with the bottom half of block filled with stock cast crank, H beam rods, forged pistons, and aluminum heads. Running it 1:1 on pump gas and going to install a 💯 shot on top of that just for fun.
My boss owen a 2003 chevy 2500 HD 496ci pickup truck I would love to see the 6-71 on!!!
I really enjoy your vids.
I have a 565ci big chevy being built for my 73 chevy k20 4x4 , engine will have AFR 335 heads , bds 10-71 , bullet racing hyd roller cam 4-7 swap .680 lift 255/265 @.050 112 lsa , boost target is 8lbs for premium pump fuel. Static cr is 8.5:1....what are your thoughts on this..?