Thoughts on a Four 2bbl intake Manifold

[custom10nut]

I have the opportunity to but an Offenhauser 4-2bbl manifold, complete with the fuel lines and linkage.
This thing pegs out the Cool Meter
For a long time now, I’ve been toying with the idea of building an engine and using a multi carb setup.
My concern is the total CFMs of all the carbs, and how much engine I would have to build to be able to handle them.
.
Any thoughts from the Old Timers?
Old School Rules!

[kwmech]

You'll have "the cool'' factor going for you, that's about it. Old tech. I think a single 4bbl would be easier to maintain and adjust

[Lee H]

I say go for it. That would be so cool at the car shows. I would try it. That being said most folks can’t tune a single carb correctly, let alone 2, 3,........ What’s the worst that can happen? You revert back to a single carb set up. Good luck, and post pics if you go for it. Lee.

[Steeveedee]

Originally Posted by custom10nut

I have the opportunity to but an Offenhauser 4-2bbl manifold, complete with the fuel lines and linkage.
This thing pegs out the Cool Meter
For a long time now, I’ve been toying with the idea of building an engine and using a multi carb setup.
My concern is the total CFMs of all the carbs, and how much engine I would have to build to be able to handle them.
.
Any thoughts from the Old Timers?
Old School Rules!

Cool, if you want cool, because it's zit point **** for performance. I'd rather see a manifold with 6 Stromberg 97s, which were still zit point **** for performance. As for what engine could handle them, you could go look at the Chevy 6-cylinder forums. Good luck with your project. Not meant to be offensive, believe it or not.

[truckster]

If what you're looking for is something unique for showing, I think it would be really cool. If you're thinking about performance, it's going to disappoint you. Aside from that, it's going to be a chore to keep those four carbs tuned and synchronized.

[dmjlambert]

It sounds outrageous. I like it. I wonder if you could put adapters on it and hook up 4 Quadrajets. It would be fun to custom cut and weld together 4 stock style air cleaner housings to make one massive air cleaner housing with a row of snorkels. That would be style.

[Grumpy old man]

Do it .

https://www.youtube.com/watch?v=H-DwOwpk_Nk

[Steeveedee]

Originally Posted by Grumpy old man

Do it .

https://www.youtube.com/watch?v=H-DwOwpk_Nk

That setup says, "Feed me, Seymour!".

[Grumpy old man]

Originally Posted by Steeveedee

That setup says, "Feed me, Seymour!".

He lives about 1/2 hr away from Pigeon forge / Gatlinburg Tn , Arguably one of the biggest cruise in / car show destinations . Whats a little gas when you could have a bunch of fun ?

[Ironhorse]

Have never seen or heard of a Offy 4-2BBL intake but have to admit the WOW factor at a car/truck show would peg the meter at top end. Just do not see very many multi-carb set ups anymore at shows. LS and EFI fever has taken over so many engine builds, even a single carb is less and less prominent. Getting a multi-carb set up be it on a BB or a SB engine can be a bit problematic to dial in but really, how often have you seen them at your local car show? Sometimes it's nice to step out of the box and venture forth. I'm running a SBC 283 with dual fours in my 57 Chevy 2 dr sedan and get a LOT of comments about it both in person and on a couple Tri-five boards I am on. Totally old school but then being almost 72 years young so am I, LOL.

Some what local to me board member Elliot949 has a really sweet 67 short bed , 327 with a Tri-power set up under the hood. When was the last time you EVER seen a 67-72 pickup with a Tri-power?

Agree with Grumpy, "Smiles per Gallon" sometimes means more to me than miles per gallon.

[special-K]

A four 2bbl set-up is appropriate for a small block, not a 6 cyl. 2-stage carbs would be cool and perform the best. Those multi-carb set-ups were all about WOT, just like a Torquer intake (straight runner/high-rise). It's style over performance with today's 4bbls available. If that's what you want then go for it. I think of the multi-carb set-ups, other that dual quad, as a '50s-early '60s thing on hot-rods with exposed engine. In one of these trucks it would be something you had to tell people or let them see with raised hood at a show. Dual quad would be period correct and was what I wanted on the 327 in my '67 project that is a period hot truck build. But I backed down once I considered while that is the look I want, the use I want from it is getting out of town... making long trips/touring around. Simple is good and so is using less fuel, so it's a single Quadrajet for that truck

[un4gvn!]

Adding all the cfm's together isn't your total cfm. There is a formula to use. Example; if you use two 1000 cfm dominators, the total cfm you would think will be 2000 cfm. That would be a lot of cfm. I can't remember what to divide the total cfm by.

[custom10nut]

The best aspect of this forum is the seemingly endless wealth of knowledge and experience.
I wholeheartedly agree with all of the input and advice.
For a long time, I’ve been dreaming of building an Old School Hot Rod engine, and then find something to put it in.
If I had a 28-34 Ford Five Window coupe, this would be a slam dunk.Just for the cool factor at shows.
I think the best app would be a Road racer or Dirt track car, and not a Drag Car.
The ultimate goal would be to have this car on an Old School trailer, with my 70 as the Tow vehicle.
Still can’t get my head out of the 70’s

[jocko]

Originally Posted by custom10nut

For a long time, I’ve been dreaming of building an Old School Hot Rod engine, and then find something to put it in.
If I had a 28-34 Ford Five Window coupe, this would be a slam dunk.Just for the cool factor at shows.
I think the best app would be a Road racer or Dirt track car, and not a Drag Car.

Herein lies your answer. I had the same thought - unless you are building some sort of nostalgic show truck (which it sounds like you aren't), that intake would be perfect for an older car, and the older the better (or more period correct). I love multi-carb manifolds, have run a tunnel ram in an old 57 chevy and it ran like a rocket at high rpm, but it was absolutely horrible on the street. If your long term goal is to tow around whatever vehicle you plan to put this manifold on, then I think that is a wise idea. Since you're going to be using the truck like a truck (which is awesome), I'd make the fuel system as efficient and trouble-free, with the best power improvements for your hard-earned $ as possible. 4-2's is the opposite of that.

[jocko]

Originally Posted by special-K

A four 2bbl set-up is appropriate for a small block, not a 6 cyl.

- Tim, I've never seen a 4x2bbl 6 cyl manifold, is there such an animal? (but I agree, would certainly not be approp for a 6)

[Steeveedee]

Early Vettes had 3 carbs, but I'm pretty sure they were one barrel.

[Grumpy old man]

I have a few of these oem 427 corvette tri power winters snowflake intakes and carbs , This one I sold to another member about 4 years ago $$$$, They start and run on the center carb that have the choke plate and idle circuit and the outer Matched carbs come in progressively and have no choke plate or idle circuit .


Did you buy the 4x2 intake ?

[Andy4639]

My good friend has this setup in his Hurst LeMans and it is awesome. I have drove this car a few times and I'm here to tell you this thing rock's! It is a fun vehicle. He is retired now but he set this up and it's a hand full when you step on it!

['68OrangeSunshine]

Originally Posted by jocko

- Tim, I've never seen a 4x2bbl 6 cyl manifold, is there such an animal? (but I agree, would certainly not be approp for a 6)

Offy has 1, 2, and 3V manifolds for the Late Chevy L6. Unless you were building an over-bored [L-25] 292 @ .060+ = 301>CI to pull a dragster or power a drag tractor, it would be impractical to fab a 4V L6 intake.

[zschary]

that setup is great. Do it without thinking about it too much.. Cant think of really anything under the hood that would look better or be cooler

[MARKDTN]

If you want to show it off and have a cool factor, go for it. If you want to drive it a lot and enjoy it, a single 4BBL will be much better. If you want to drive it and not worry about anything and get better mileage and way less fuel in the oil, fuel injection conversion.

[AU Doc]

First of all, I don't have a clue what I'm talking about. Fortunately, that never stops me from talking

I've wanted to do something similar for a while. I think it would be a much happier install with DBW throttle bodies. That would eliminate the hassle of fiddling with linkages, and it would let you tune each throttle body independently. There are controllers that do a fantastic job of tuning themselves these days. I know there is a cougar running a tunnel ram with dual TBs doing this. It's a street car with a small cube V8. It obviously gives up performance to run that intake, but it sure is cool. Particularly when you consider it has great street manners as well.

There are a lot of ways to slice this problem. At the end of the day, if you like it, go for it!

[Grumpy old man]

Originally Posted by custom10nut

I have the opportunity to but an Offenhauser 4-2bbl manifold, complete with the fuel lines and linkage.
This thing pegs out the Cool Meter
For a long time now, I’ve been toying with the idea of building an engine and using a multi carb setup.
My concern is the total CFMs of all the carbs, and how much engine I would have to build to be able to handle them.
.
Any thoughts from the Old Timers?
Old School Rules!

How much do they want for it ? I see lot's of responses of why not to do it , But not everyone is drinking the LS koolaid . Small block build parts are basically "cheap" every project starts somewhere . If you buy it I'll give you a new engine stand to help get your project going .I have a few extras in the way . I'm not saying you have to drop it in your truck but while your building the engine you can decide what to drop it in .

This one runs fine and who cares about MPG ? It's about Smiles per gallon ! and I have a good Muncie connection , Great now you've got me thinking about another project !

https://www.youtube.com/watch?v=FtVfuWy3-Ts

[tommy3horse]

Wow Grumpy, thats awesome! The fuel plumbing would need to be like artwork, love to see it hooked up and running on something...

[72c20customcamper]

Not to hard to set up multible carbs. Hardest part is syncing them but it's just like doing a motorcycle. Also my AMX has dual Carter competition 625 cm 4bbls. Took a while to get the jets dialed in but it runs well. And yes peoples eyes light up seeing multi carb setups