spread bore to square bore carburetor adapters explained.
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- Опубліковано 20 жов 2024
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Brother thank you I was stuck trying to figure out away to get pass having to spend unnecessary money on rebuilding my quadrajet carb when i have a holley 650 new just sitting around....i have a 1988 chevy monte carlo 5.0L I am getting a 383 stroker built and just need to be able to move around and man I watched your video and went and bought the adapter and man everything worked out great thank you brother
Great video. Just picked up my first square body and I was confused on how this s**t works and should work. Got the basics down and can now reassemble correctly. Thanks!
Chad, thank you this was helpful. Like usual presented well enough even I could understand.
I know learning things good and fun, but finding out younger me had a lot of things wrong hurts!! Keep up the good work
thanks for the thoroughness, just looking for a similar video for Fords
God Bless You. I am looking for the best info on the adapter I needed and you set me in the right direction. Thanks for the amazing video, which is very informative.
I'm glad my video helped out.
Found your video and was great help for my build!
One question though, I'm running a 351 Cleveland with performer dual plane intake, would you recommend a 1" inch: square, 2, or 4 hole spacer and why? I've read dual plane it's for better low-mid power. Thanks in advance 🤘🏻
I usually run an 1" open spacer on my dual planes. It helps to even out pulses in the plenum
@@SquarebodyStuff gotcha, and what would that lead to in terms of power, rpms, and driveability?
@@pibe8761 yes, but also not really hurt the low end either
@@SquarebodyStuff I will try it on and see the results I guess, thanks 👍🏻
Try different ones and see what works best for your combo.
This was very helpful, I’m building a 305 powered YJ and was on the fence about using the stock manifold with Holley carb.
junk the 305 your gonna spend alot of money and get nowhere. They cant breath!
@@jimmyharris6056 it was a free 305, when it goes boom then the 350 goes in.
@@jimmyharris6056 305s do just fine key example the l69 that was 190hp when the 350 of the same time was also 190hp in the z28 and the lb9 was 230hp while the 350 was still 190, nothing wrong with a 305 just need to know what youre doing with it
Ty brother the last one applied to me !
I always suggest to also find and use the thickest gaskets possible for the best chances of sealing and to help a bit with heat soak/vapor lock. Also to save you a few bucks in the future coat your carb gaskets with a thin coat of chapstick or bearing grease, if you do that you can reuse the carb gaskets most of the time if you don't then they usually stick and rip when you remove the carb.
There's another reason to use those adapters "upside down". I picked up an old holley 4175 from a junkyard, long ago pulled from some late 70s mopar. To save a few cents on their end, they spec'd it spread bore - well, to use it on my aftermarket intake on my chevy, I need exactly that.
Now that I think about it, I should just find a normal baseplate.. and 4165 secondary metering block et al... man, it never ends lol. or just use the stupid adapter for now and be happy
Good info for a non mechanic but a car painter./guy . Get older some of the basic stuff I have forgotten like the spread bore adapter solution.
Do you know if there are Adapter plates to put a Chevy Carb (factory Chevy TBI) on to a Ford 351W?
I got a propane work truck 1985 F-350 commercial dually flat deck I want to make it Dual fuel because Propane is nice and cheap, but it starts like trash in the cold weather and some towns don't sell Auto propane . I have some spare TBI around from my Square body Suburban and Love the GM TBI system. And TBI means I can shut it off easy and use propane when convenient. I'm planning on just sliding the TBI underneath the Propane mixer (propane carb) and wiring some shut offs switches.
Are there GM to Ford or Ford to GM adapter plates?
I'm not 100% sure on that one. Depends on if it's a 4bbl or 2bbl intake.
@@SquarebodyStuff Propane is always 4 barrel
@machscga6238 ok, I'm not familiar with the propane setups. I want to say there are tbi to 4bbl adapters, but you'd have to search the web for them.
@@SquarebodyStuff ok thanks...
Propane has a 3 stage set up equivalent to a carb. It goes from the tank into a safety valve, then into a vaporizing converter, then into a mixing Diaphragm. The mixing Diaphragm is like a carburetor but it's alot simpler because everything is pure gas at the mixer.
Here in Canada you can pickup all kinds of Propane trucks Chevy and Ford from the 70's 80's and 90's because they were easy conversions, and they were exempt from road taxes back then. Even today with Road taxes applied to the Propane is only $0.90 per liter ($2.49 US gal) vs Gasoline at $1.50 per liter ($4.14 US gal) and Diesel at $1.70 per liter ($4.70 US gal).
But Propane isn't sold for Automobiles everywhere, and about 10-15 degrees below freezing and you need a Block heater or you can't start the truck.
Thank u 🙏 very informative 👍👍👍👍👍👌👌👌💯💯💯
I also helps to round out the sharpe flate edges on the gaskets surfaces on the factory intakes including the flow holes on the intake for better flow if using open hole spacer plate
Thank You Sir thats the info i needed
You're welcome
I have 76 Chevy square body with a 302 Sm bl factory intake taking off the quadrajet replacing with a holly I have the adapter plate but also have a thick gasket for a Holley carburetor and I was wondering where you put it do you put it on the intake manifold or do you put it on that adapter between the adapter and the carburetor
I appreciate you not making it too short. Very useful. Question about the spacers though. On one of the many other videos I've been watching about fine tuning the edlebrock carbs, 1 guy recommended 1" or higher non aluminum spacers to insulate the carb from the engine. His reason was that with all the ethanol in gas now, he had run into instances where hot engines were boiling the ethanol and causing issues. Now he was a hot rod guy. Have you seen this in your daily driver?
Yes, I run 1" plastic spacers on all of mine.
Thanks for the video I know it's older but you know what it just helped me out a lot I almost put that spacer upside down cuz I was wanting to put another Brock carburetor on my Chevy with a 305 V8 engine the only thing is the studs would be nice because you could just reboot all the hardware for the throttle pedal right back down and just hook everything in line if hopefully it would line back up
I like your video and I was hoping to clarify something . You mentioned earlier in the video of people putting the adapter upside down and it caused problems. If I understood you right you turned one upside down intentionally to make the adapter fit? I have a Holley 4180 on a 460 that I need to replace with a quadrajet carburetor the kit I have is a spectrum adapter kit designed to adapt Holly and other carburetors to a quadrajet manifold. I need to do it the other way around. Can I simply flip over the adapter and as you mentioned get longer studs and be able to make it work with maybe a few small modifications? Thank you. very helpful video
I'm not sure with that specific brand and how it's designed, but most of them are already made to go either way. If it's not, I'm sure longer studs might work.
Lol. Back in the day I had a 69 nova with 350 4 bolt main. Spread bot intake. My car went bad I had no money. So I had a thermo quad of of a 340 it fit just fine. Ram good on low end. As far as driving around not much on top end. But it was a eye catcher. Everyone thought I had something special and I was tell them a lie. But get it was the truth.
Hey I just traded for a boat. I never saw it until it was delivered to my house. Found out it’s got a 350 Chevy motor.
Will it work in a truck. Just by looking at it I would have to change a few things. Can you answer this got me.
It should work
Hey off topic but you said your a Holley guy. I have the 625 street demon and a factory manifold. I am having trouble with hood clearance. Do you have any advice on a drop base for 13” air cleaner? That would clear the choke and throttle links on carb.
Thanks
I don't have much experience with them, but I'm sure summit or jegs would have what you need.
Hi! I am trying to adapt an edelbrock like the one in this video to the stock small block intake. You said that the butterflies will not open without the adapter. On a forum I read this statement. "A lot of 4bbl intakes have that asinine square bore to spread bore adapter on them, if so toss it and put on a phenolic spacer the same thickness".
Thoughts? Will the phenolic spacer be better or worse than the adapter?
Thank you and I liked and subscribed.
Depends on what intake you have. If it's a dual pattern performer, you still might need a thin adapter plate to get the phenolic spacer to seal. www.googleadservices.com/pagead/aclk?sa=L&ai=DChcSEwip4dvA3pmDAxVP98gKHTgjA48YABAJGgJxdQ&ase=2&gclid=CjwKCAiA-P-rBhBEEiwAQEXhH8lHcdEDElC2bQXQUEoVxlQwJSzyHjY3S7a9E4T76IPyUyZ3MQ11RxoCNIYQAvD_BwE&sph=&ohost=www.google.com&cid=CAESVuD29ZUfiQTRH0aV7FdHWxDQFeZcJt7AlOkD1TkN2XGFOUOeIUICD_tkbU8gh9GGlQK4WS0hU8DHEWYt9Er8kzGrElNj4OOULfVOU9df-LOmBsU7KVT1&sig=AOD64_0wr8Hd6Kt2ac-r2ek3ypjAZNdJQg&ctype=70&q=&nis=4&ved=2ahUKEwiQ79TA3pmDAxUwk4kEHTpkCL8Qwg8oAHoECAYQDA&adurl=
Edelbrock carb with performer intake on my AMC. I need a spacer (solid) to help with fuel boil. Should I get the square or spread bore spacer. And do I still need the adapter plate(2732)?
I would get a solid square one. You might still need the 2732 adapter to get a good seal.
Do you have a video on selecting carb cfm and avs vs mech secondary
@@diamatronyt no, what size engine do you have.
AMC 304 with Performer Plus Intake and Cam with Shorty Headers on my Jeep CJ7 1978. @@SquarebodyStuff
@diamatronyt 600-650 cfm will work great for that. And I would stick to vacuum secondaries for a street car.
Hey Chad I have a 1990 Ford F350, BBF and she suffers from vapor lock big time. How high can I go with spacers with a Edlebrock carb 1405 600 CFM’s, thanks, Ken
1" should be fine
Edelbrock manual says to NOT use the open adapter or you will experience vacuum leaks.The adapter with the four holes for primary and secondaries is the one they say you MUST use,so I am still confused as to why the open adapter would cause leaks.
Possibly not enough sealing surface around the perimeter.
would it not go upside down if you had a square bore performer rpm intake and spread bore 850 quadrapuke on it? im looking for the secondary valves opening and clearing.
I believe it will work that way also.
Have a edelbrock 1406 on a edelbrock intake. Was having some heat soak before so i grabbed a phenolic spacer. Im using the 4 hole insert because it was used to the factory intake. Just came across the packaging where it says i have to use the open insert for the eddy. Im assuming its less restriction,so will that mean more low end torque?
So the newest manual says to not use the open adapter and use only the one woth 4 holes. Give up,time to buy a holly and forget the adapter crap
If I want to put a spacer for a Quadrajet with a standard 4 hole spreadbore intake can I use a 4 hole spreadbore spacer?
Yes
Hey sooo... i may have missed you stating the answer to this question. I have a holley marine carb, its a spread bore my scottsdale is a spread bore im worried about throttle linkage clearance. Would a square bore adapter work to add spacing without causing restriction? Would i have to use spread bore gaskets on both sides of the spacer or... a combination of square and spread?
You would need a spread bore spacer with gaskets on both sides.
@@SquarebodyStuff hey thanks a bunch!
No problem
if you put a 2bbl on a ford 460 will it fall flat on its face when you drive it???????????? a friend o mine has a f350 with a 4bbl converted to a 2bbl carb n it dies out when you drive it. is it the wrong carb on the engine???????????????????/
It should run fine with a 2bbl as long as it's tuned right. It may not have as much power though at full throttle. Allot of dirt track cars have to run a 2 bbl.
installing a quadrajet on a dual pattern intake (edelbrock)like the small block intake up here. Is my understanding right that I don't need a plate?
You shouldn't need an adapter for the spread bore style edelbrock intakes.
@@SquarebodyStuff ok thanks man! Great video. I appreciate it
Will a SPREAD Bore Edelbrock fit on a Qjet intake? I cant find this answer anywhere lol thanks
I'm not 100% sure. I think it will.
@SquarebodyStuff I have a 350 Mercruiser with a Qjet that's just done. And I wanted to put a Edelbrock on it but the adapter plate might not allow me to use the same linkage. But I've seen guys same engine same intake running a 600cfm Edelbrock with no adapter and I'm like HOW! Lol but anyway thanks for your input
I have a 69 dodge d100 318. When I bought it, it had an edlebrock intake and carb on it.
I want to put a quadrajet on it. Is there an adapter to go from squarebore to spreadbore?
Same adapter I shoe in the video, just flip it the other way.
Uncle Tony just did a video on dressing up the adapter for performance
Why do you got that one carb adapter upside with the tape and screws ain’t it supposed to be the other way up?
they can go either way
How about a spread bore carb, going on a regular 4150?
Just flip the adapter over
Square bore to spread bore adapters an vise verso kills power and flow better off to get the intake your carb or efi needs
I’m having this issue. I replaced my quadrajet with a Edelbrock avs2 650 , I used the recommended 4 hole adapter and I cannot get rid of stumbling In the secondary’s no matter how I jet it or adjust the air valve
@@ryancobb7511 did you verify for correct ignition timing? If you don't have enough timing then the engine will be way down on power and can cause bad hesitation and stumbling, also make sure you have the correct power piston springs especially if your using a larger camshaft with more duration. But always check your timing for proper total timing and make sure the mechanical advance is functioning correctly first before making any carb adjustments.
@@briang4470 yes it’s doing better now with more advance. I was already 36* total timing but I put more advance and it seems to love it. I don’t hear any pinging and not having start up issues
@@ryancobb7511 there is a very strong possibility that you harmonic balancer could have slipped so just because it shows 36° on the light doesn't always mean it's accurate. For best performance you may want to try to add 2 degrees at a time and run the vehicle hard and see if it pings and keep adding timing until it pings just a bit and then retard by 1-2 degrees.
@@ryancobb7511 36° seems pretty high
Hello, my fifteen year old bought his first truck, 76 3/4 4speed, anyway has anyone ever cut the factory 4 barrel intake into a single plane? He's 15 and no money so it couldn't hurt especially since he's birthday is coming if it won't run right.
It won't be worth the effort.
What about putting a quadrajet to a edelbrock performer rpm intake?
Flip the adapter the other way.
@@SquarebodyStuff so revert to 13:45 on your video correct?
Yup.
@@SquarebodyStuff thanks I appreciate it 🤘
You might lose a little torque using an single plane spacer on a dual plane manifold ya ?
Maybe a little
I thought you was going to show us how to add the adapter to the intake you just showed us a whole bunch of adapters like you have stock in it
Whose an elder brock
👍🏾👊🏽
😅 fuel pump going out and it's in the tank on a 93 truck is Ben from TV on the card so I can I put a electric fuel pump on the frame of the truck
I need one of those shop shirts for when I go over
I might be able vto make that happen
Have the whole squarebody stuff work crew
Yeah
HE'LL YAH ELDABROK CARBONATORS
lol, eldebrock...
SO WHAT 👎
Thanks for the comment.
Really digging your new shop shirt with your channel logo on it
Thanks
@@SquarebodyStuff redcap?
Not sure what you mean
@@SquarebodyStuff Like Redcap shop shirts, or Dickies ?
Lol, I just figured it out and was gonna edit my post if you hadn't responded. They're Dickies.