426 HEMI Stroker - Headers VS Manifolds
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- Опубліковано 4 жов 2024
- Nick's Garage stickers and shirts! teespring.com/...
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Nick has had lots of people asking him how much power can be made by putting headers on a build. He decided to carry out a little experiment in the dyno' room and find out. Nick Panaritis loves power, and he loves finding how to make it.
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"Exit the Premises", "Immersed", "Nonstop", "Voltaic"
Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0
creativecommons....
Im impressed with how good those manifolds look
Rev up your engines !!!!!
Ooops, wrong guy
I really did enjoy this !
Scotty???
🤣
Scotty is a click bait fool
I have had several vintage 67-71 Mopars and it's nice to see someone keeping the old girls running. Thanks for the videos.
I feel like this is one of the best Video's Nick has ever done. And that's saying something considering all the video's Nick and his team have made. Doing a test on a Chrysler Hemi puts it in the top tier of all video's, but the dramatic difference in power is stunning and that combination plus the fact it has been an age old question going back to the 60's makes it a very special video. The mentorship being portrayed between Nick and Vasilis is one of the coolest things I've seen on the internet as far as car guy content is concerned. Like a Father and a Son. Bravo Team Panaritis.
the Jacques Cousteau of Hemi engines 👍
It runs Makuni oil injection pumps, thats what i would run on this if i had one.
Nick reminds me of an older version of Steve Dulcich.
Val West , Cool. This just showed up in my "recommended" box and I clicked, so it's the first I've seen him. Seems to be very experienced, thorough and professional. Thanks. Think i'll check him out.
Anteater....ua-cam.com/video/agRGY2aG0rQ/v-deo.html
Bruce Miller mikunis are bulletproof
i like this guy...solid info presented in a professional and entertaining manner...thumbs up!
Yeah, he's good. You can tell that he is nearing the point of true automotive enlightenment, and when that happens, he will switch from Mopar loyalty to Ford loyalty. That's how true enlightenment works! It's a journey, and those 'other' manufacturers(Chrysler & GM) are merely stepping stones in that path.....
Nick looks like a rocket ship captain when he's at the dyno consol :).
He's serious ! 😉😎
" I can hear the rocketdyne propulsion system is a little lean on engine #4, better increase peroxide flow 14% for optimal thrust..
-" yessir, setting the controls for the heart of the Sun now "
Those old V-8's sound Amazing !!😍
The header test was very interesting. I always was interested to see a test like that done. Before you gave us the readings, I predicted a 10% loss. I was not far off.
Barry
I love the way Nicks camera picks up the rumble of those monsters he tests.
We had the same thing at our shop. Same size engine, but we didn't have headers. The client wanted to test the engine with the manifolds because that's the way it's going into the car. We worked mostly with different timing settings to accommodate regular fuel.
Absolutely amassing and unbelievable.
Excellent video, very clear. Best part no crap music.
First time ive ever seen this test done anywhere.. awesome
What a beautiful sound
Thank you! Just finished building a engine for my baby, and have been struggling with the whole headers/stock manifolds deal... Very informative! Thanks again.
A very interesting test....What is nice about exhaust manifolds is the clean/unobstructed engine bay and lower engine bay temperatures.... But for over-all performance, headers can't be beat.... This is why this program that Nick does is so good... Great results of testing on a dyno.
Some day, maybe another test on a hemi with 3" headers!
Thanks very much , I was trying to find to find just such a test on a healthy big block of any kind any here in good old Canada we have Nick doing it very scientifically
Marc , thank you very much, and thanks for watching .
I love the videos I could watch them all day
Marc Rabinovitz
what a monster ! ! ! DOCTOR NICK Frankenstein....
Really informative test. Great information Nick and crew.
That is a major finding. Congrats Nick.
That nick is one smart cookie
Thank u so much for doing this comparison. I was wondering what I was going to put on my 426 hemi for my 68 hemi charger . Now I know, definitely headers.
The commentator reminds me of a golf broadcaster, this is the cinderella shot, is he gonna make it , the crowd gets quiet and the hemi roars, wow, cool vid, filled my house with smoke tho. think my laptop blew a valve cover gasket.
I remember the first set of headers I put on. I was definitely impressed. I would always start there. Helps everywhere in the rpm range and gives you a few more rpm of usable power.
I always knew about the advantages of headers, but never realized could b that much...
You won't see the same results on most engines. Hemi's were designed for Nascar with high RPM flow. Hemi's really need to breath and that's why they go batshit with relatively basic mods.
231mac checking the jetting between the 2 setups might help, but yea manifolds kill the beast.
Milder engines won't see extreme gains (or losses) as this beastie did.
Engine Masters did a test on a small block chevy and the results were in no way anything like this Hemi.
Thank for the videos. It’s good to have quality tests on engines.
I had the opportunity to see this live..............really amazing and professional.
Thanks Johnny!
Headers also change where the HP and TQ come in too. The size of the tubes and collectors makes a marked difference. We had a 472 stroker with 4:10 gears in a 71 Challenger. It ran out of gear and rpm with manifolds in the quarter. With 2 1/4" headers running 3 1/2" collectors, it moved the power curve up so the car could run through the quarter. In fact, it was able to outrun the new hellcat it was running against in the first 330 feet! Also, the size and length of the entire exhaust system will have an effect too.
Larry Drozd, I agree with you. Thanks for watching
I would love to have these guys build my modern 6.1 SRT Hemi! Great channel guys. Love your work. I am also a Canadian by the way.
Shayne Baldwin. We had just finished stroking a 6.1 into a 7.0 liter, and we had installed a set of 6.4 cylinder heads. It was a Chrysler 300 and we had it put on a Chassis Dyno and made easy 600HP. Thanks for watching.
Get those headers installed!
One of the best channels here....like to see a pull on a 318/390 stroker in the future? =)...closer to home for me, never gonna have Hemi-money..so I got my 318..and thinking of to turbo it or stroke it...and yes LS bores me haha.
Most of the hot rodding magazines had articles (some available online) on how to easily/cheaply get a 318" to 400 HP... by modifying stock '87 Fast Burn heads... flat top pistons... and a mild cam...
ah cool..yea this engine belongs in my Grand Cherokee Limited -98..so around 350-400 will be plenty for that car...needs a little more thump..and dont know how much the 44RE transmission can take either..
sorry if I spell or explain funny, Im from Sweden and dont know better..haha
makes sense that an LS engine that triples the performance of your "318" economy slug
stock while getting 20+ mpg would bore you,lolol.just dont get confused and think your 318
is something,throwing money at a "318"is like throwing a bundle of hundreds down a
toilet to watch the flush pattern.there's a reason ls is the new king of small block motors
that make a shit ton of power,turbo an ls and your close to 1000 hp,turbo a 318 and
youll have 250-300 MAYBE--HAHAH
There's not doubt the LS motors are impressive, but they've had 40 years to work on the improvements.
The 318 actually has quite a desirable bore-stroke-rod length ratio, so it will respond nicely to modifications.
There are several car magazines that each ran their own version of 400 horse 318's, all with pretty mild cams. The 318 is nearly the same size as an LS-3, and with just 7 pounds of boost, and some higher flowing aftermarket heads, the 318 would effectively seem like a 477 cubic inch motor.
yeah, because those "hot rodding" magazines are always right
I’m VERY knowledgeable about Old Engines but would LOVE to just stand around there a day with my hands in my pockets just watching. My 1968 Dodge Dart GTS Convertible has a Supercharged 360 bored & strokes to 407c.i. Making 691hp & 575 fp. Of Torque. It’s a Nice Car.
I'm glad he never says lets swap it out with an LS. He respects and sees the value of old school.
headers...headers...headers. The best horsepower adder for the price out there today. thanks Pete for showing how effective they are.
That has been true since the 60's.
The best automobile engine ever made in my opinion.
That was an awesome dyno run.
And Nick does it so scientifically it's like a document.
He has an incredible set up. Got to give that to him.
Chrysler probably had to use a manifold that was sturdy enough to hold up but compact enough to fit in the cars they intended to use that engine. Too often with mass production it comes down to using what will fit the most cars with the least amount of problems. The manifold had to clear suspension, steering posts, and still be accessible for the exhaust system. I didn't think the manifolds would be that much lower and maybe by adjusting the carbs Nick could get a slightly better number. But this proves you cannot discount headers that were tuned to that engine. Headers do more than just give it more room to dump exhaust, they actually use the power of the exhaust from one cylinder to help pull air into a neighboring cylinder. Where the pipes come together at the collector, when one is blowing exhaust the pipe next to it might have a slight overlap of the valves such that both are open for just a millisecond. The stream of air blowing past the one pipe creates a slight pull on the air of the pipe of the cylinder with both valves open. That has the effect of helping pull air into the cylinder that is about to begin the compression stroke. I know this only because I read a technical article on it way back when I still subscribed to Hot Rod magazine. Some brainy engineers figured that out for us. The tricky part is getting the correct length of each pipe and making them fit in the car. Some radical headers require hacking out parts of the fenders or even firewall. You don't want to do that to a factory original so you settle for the headers that will fit. Some cars use that principal by adding a crossover pipe between left and right exhaust pipes. My Harley lost torque and HP when I put different pipes on that did not have a crossover. I could make more power if I revved it to, 4,000 than with the factory pipes but I seldom needed 4,000 so I put the factory pipes back on and instantly noticed more torque, more HP at low rpms where I normally ride.
Yes headers is the way to go for power ! :) thank you guys !
Even the 3d gen Hemis love headers. I picked up around 25 rewhip with LT'S on my 5.7 Hemi
Viva La Canada eh!! Thanks for your great work, I spend all day watching these pulls. Stroked hemis, nice. Detroit approved!
Ronny, Since you like watching this on video, you would freak out being in the dyno room seeing this " LIVE" ..Thanks for watching.
NICK is THE HP MAN....! Fantastic video ...interesting beginning to end... BRAVO....!
tejastiger61.. Thanks for enjoying it.
You are a Great American Inspiration ... Hard tedious work that is most clearly done with love, wonderful.
For the record...Nick is Canadian....and...I'm sure that 99% of Canadians are a "Great Inspiration " to any American.....lol
awesome Nick you are the mopar Godfather !!!
Wow! Very surprising to see such a big difference. Great video enjoyed very much
If your old school mopar from the montreal area Nick is a legend.
Nick loves headers 😊
I never would have dreamed of losing 65 horsepower but this is an enormous motor putting out a lot of exhaust I would expect on a smaller motor like a 5 liter Mustang probably wouldn't make is dramatic of a difference
Super channel NicK! Invaluable info - HUGE new fan from Michigan.
Herman Moser had an idea... He and his drag strip buddies (the Ramchargers) proved it in a very famous old hot rod called the "High and Mighty" in 1959. ( You'd have to see it to believe it...) He was an engineer at Chrysler. However it was not then a good public relations move for Detroit engineers to be seen mingling with hot rodders who were looked upon the same way as motorcycle gangs at that time. The combination of both streamlined and tuned intake and exhaust manifolds made for mechanical efficiency (horse power). He sold it to his colleagues at MoPar and the rest is history. Herman Moser is a name to remember if you're interested in these things.
Thomas De Lello.. I read in the past that Chrysler Engineers used to talk with street racers and Drag racing teams, But I did not know Herman Moser was the man. Very Interesting. Thanks for the input.
Actually... many of the Detroit engineers and executives appreciated what the drag racers were about and had little covert projects going on in their Skunk Works. It was in 1959 that Wally Parks moved his "Nationals" annual event to Detroit in a PR move to court their sponsorship. It was a very hip thing for Wally to do, Wally was smart...! That, basically is how muscle cars came into being. Well... there were multi carburetor options available before that time but hot rodding really pushed the concept over the top and that's how it happened. Read up on Herman Moser, the Ramchargers and also Zora Arkus-Duntov.
Richgrons
I like nick , this channel deserves more subs for sure .
Thanks! Tell a friend?
Nick's Garage not a problem .
Hey Nick, love the channel, really good stuff! PLEASE do a comparison on a 383 or 440 with stock cast iron log vs. cast iron high flows vs. headers. Would be great to see the POWER differences, Cheers!!
mcshagger510. Next time I have a 440 on the Dyno, I will do the Manifolds vs Headers test and put it on video.
Fastest barracuda ( '67 440 1180 dubble pump ) I went against , mine was '69 442 w30 back in Calgary . Great Times ! ' 80's 4 Ever !
With the manifolds it seemed slower to rev up too - maybe my imagination. I don't know how I missed this vid. I'm glad I did because now I got one I hadn't seen.
How did I just find this channel ????? Keep it up,Love Mopar....I own a 68 Charger RT,440 built up a bit best time was mid 11's in the 1/4..But its not may racer,it felt really fast ,so took it out only 2 runs then enough for me,dont want to destroy it..It looks stock in/out and under the hood as much as possible..Looks stock but is my street car,daily nice weather driven..440,727,3.23 gears..My buddy sure kind of over built my Daily driver,but its reliable 30,000 miles so far and regular maint...My Dad is a original owner of a 70 Cuda 440 6bbl,well actually was a dealer demo with 2000 miles when he bought it...Same price as a new 383 Cuda they were selling,so no nrainer go with the Demo 440 6 barrel ! I also have a 72 340 4speed Challenger purple cam/heads/3.91's and solid high 12 second car with street tires again 275/60/15's..,but a nice quick street car again,never lost a street race with it either !! my uncle has a 426 Hemi and ran high 11's in the early 70's he had 3.54's and headers,slicks don't know what else he says its stock..
01trsmar. Real Mopar family, nice. Great cars!
Awesome comparison.....only at Nick's garage
Very cool video, thanks
Damm😳that thang sounds sooooooo sweet❤️❤️
I love it, keep up the great work and best of luck🍀with all you do.
I didn't think the difference would be that big. Those manifolds look like they'd breathe pretty good. Maybe if it was a stock engine and not punched out, the factory manifolds would've done better. WoW.
Got to be the coolest guy on You Tube!
I like to see you do a 340 its great motor but over looked.
thanx Nick, great video and enjoy really seeing what the diff is
2 years ago I did a 383/489 Mopar stroker, not a crazy build, but I picked a cam for power brakes, and for the hell of it, I tested it with manifold and headers, motor made 590hp and 610tq, with headers (tti) and then the manifolds, and it lost 60 hp! And 28tq, headers are the way to go for power!
agreed. I installed all new BBK cold air intake and throttle body and all new exhaust (JBA headers, high flow cats, and 2.75" pipes) in a 2001 5.4 F 150 with 200k miles. Runs so much better!
Love these series Nick, keep 'em coming. In the auto world, you can slide further on B/S than on gravel, and as you say, the dyno has the last word, ha! BTW, in the UK, many years ago, our guru was one David Vizard, one of your tuning ancestors I think, living/working in NC, and still turning out MONSTERS, I'm delighted to see. You should get your heads together?
Your videos are rad nick 👍🏽I'm a fan of all your work keep up the good work
Super interesting!! Thank you!👍
i think the real reason for this session is nick loves to hear these elephants roar😏
great... Now all these dudes are going to bolt long tubes on their stock ls motors, coyotes and 5.7 hemis and be like, "they add 65hp!" lol. I would love to see some tests of bone stock motors with before and after tests like this. Awesome video by the way.
Even if installing headers added 0 hp and torque, I'd still replace the factory exhaust manifold on the Hemi because original manifolds are hard to find in decent condition and very expensive.
I personally don't think this test was even fair. It was open headers. But he attached some tiny ass exhaust to the manifolds. Lol not sure what size it was but looks about the same size pipe on my small 302 sbf.
Great video. I am still on the fence about CHANGING the manifolds in my supercharged 2006 Z06 with LS7. The factory setup has a large oval collector and flow directors internally. But for this stuff I can see great results!
no motor in history scared so many people THE HEMI
They ran great.
The Ford SOHC scared Chrysler to the point where they pulled strings and got it banned.
I agree about the ford, the Hemi wasn’t deemed too powerful and banned the SOHC was.
The only reason the hemi is alone in its mythical status is the SOHC was killed before it was sold on the street in any quantity. (Minimum production numbers to qualify as a “stock” engine for racing)
Ps, id rather have the boss 429 personally
@@iqinsanity The last SOHC I saw for sale was $34,000. I think they claimed it put out 700hp,....normally aspirated.....
Nick, you also have to keep in mind how well made the headers are. If the primaries are mismatched with the collector sizes. If it is done right, there should be NO loss in torque or horsepower. I recommend to everyone to get a copy of an old Headers by ed catalogue and cassette tape to do headers right.
Have been waiting along to see what a typical 383 Mopar would make with simple add no’s like headers, cam, intake carb and ignition would make. There’s a lot out there.
gotta love his logic
cool, id like to see that difference on a standard 305,302 or 318 engine
I’d love to see this test on a stock ford boss 429 engine since that engine was a nascar choked up for the street
Will Butter. I wish I had a 429 Boss engine to test.
@@nickpanaritis4122 This one was a lot like the max wedge with factory manifolds, better than you would expect.
You wouldn’t see as big a change on a stock Boss 429. That engine, with less ci and a tiny stock cam just doesn’t flow anywhere near the amount of air that this 472 ci Hemi with a bigger cam flows. The more air an engine flows the more effect an obstruction like stock manifolds vs headers will make.
I love the reality TV suspense. The only thing that would have made it better would have been 2-minutes of commercials right before the cast iron manfold HP results.
+Anthony Munn haha! You hear that, sponsors?
Nick's Garage ....Hey Nick, I got a 94 tbird with 4.6L. v8 Can I and would it be worth it to put headers on that? Thanks for any help.
Old coinchaser. It will give you around 5 to 10 HP. with headers and free up the rest of the exhaust system.
Nick Panaritis ....Right on. thanks for the info. I'm a sub, so please keep up the great video's. God Bless
Anthony Munn lol
dual quad intake and afb's killing it .. one holley make atleast 30 more
Needed to be done with a Factory Motor and Iron Manifolds... Displacement was changed when bored out to 476ci.. Those Iron Manifolds were not built for that size motor.. Great Channel, got to see my old favorite motor..351 Cleveland.. Oh how I miss that 71 Ranchero...
that sounds F-n AWESOME !!! 👍
Hey nick 4 letters says it all. Hemi!!
Manifold looks nice
Great video !! These are actually very good designed factory manifolds.... Would have been a wider spread yet with some standard design where the exit hole is straight down the center between the middle two cyljnders.
Hi Nick, you have a great channel!
I think that in order to do justice to the manifolds they should exhaust into bigger pipes or ideally into some kind of volumes.
It is very possible that you could induce scavenging with a hollow mufflers of some significant volume right after the manifolds.
The main difference here is that the manifolds are not tuned on their own. Also, the headers have their joining section that has it's volume at a certain tuned length.
PenkillerDIY, Thanks for the idea, I will try that with big pipes after manifolds next time.
Nick is the god of engines.....................
Wow!!
Great info. Cool!!!
Doing the lords work
More than I thought
Port matched gaskets might be better than silicon but headers definitely better !
Headers may not make power but they sure let the power you have out!
Holly sacred cow, i mean, sacred engine.
he said "stroked out" like its your old Aunt Tess lol
Plus the difference in the wait between the two
Headers all the way !…Less weight & better sounding…& Obviously More HP🦾
I always heard people talk about gaining 50 HP with bolt ons like headers vs stock manifolds. I guess on some applications that's more than 100% true.
You don't really 'gain' 50 HP... you 'recover' 20 - 200 HP lost to most stock exhaust systems...
Absolutely. It all depends on exhaust manifold design and displacement. Thanks for your interest.
I had a 75 Trans am that had a 350 chevy with a 144ci B and M blower on it and their fuel injection set up. It had Hooker sidepipe headers on it for exhaust. When I swapped out the straight thru glasspack mufflers in the sidepipes for the turbo mufflers from hooker I thought I had dropped a cylinder or two the difference in performance was so extreme. So yes I can understand how changes in the motors exhaust system can make huge difference in performance. When I was at the track and run without any mufflers in the side pipes I only noticed a slight drop in performance over the glass pack mufflers.
The headers have at least 3" collectors fed into at least 4" pipes. The manifolds have 2 1/2 inch flanges. How does this outcome suprise anyone?
Not surprised at all, the engine configuration show it doesn't need bigger exhaust volume to scavenge efficiently
I think the surprise is how well the factory manifolds compared to headers, especially on an engine considerably larger than stock. This isn't a clean up bore.
A average set of headers is good for at least 25 hp. Full race headers make at least 100 hp. Once a engine runs good, Air to fuel ratio is a huge part of making big horse power.
Try compairing shorty headers like on a dragster vs. collector headers that will also blow your mind.
love this... but protect your hearing!
Nice test.
Before watching the video, i guessed 10 to 15 hp drop with the manifolds. Boy i was wrong