Technical GMC 471 blower Carb Options.

Need some help from people with real world experience running a small cubic inch motor with a blower. I dropped of the motor at the machine shop last night to get freshened up the specs are going to be as follows

331 - 327+0.030
New pistons
Stock rods reconditioned with ARP bolts
Stock Crank
Crank ,rods, and pistons will be rebalanced to 0 balance
Stock 462 heads completely redone
Howards blower cam

CR with be Static 9.28:1 Dynamic will be 7.24:1 and with boost of 5psi about 9.57:1

Super T-10 Trans with Max 3.55 gear out back.

car will weigh roughly 3000-3200lbs

So do I top my 4-71 with one 750 or 850 or two 480,500,600,650's??? and why??

Already have the top plates for both and no carburetors.

 

2 carbs would look good but to some might look too much for a 4-71....Any choice would be a good one.

I just have say this here since your the first one I've found after thinking if this....if anyone asks what is it? I'd say it's a 331 "stroker".. (302 with 1/4 arm)

 

Contact Gary Dyers (Dyers blowers), and ask his opinion. You won't get a wrong answer there.He' been in the biz a long time. Blowers do not like inlet restriction. Big is good!
Let's see some pics!

 

More pics in my 4-71 on a 327 post

 

You are very youthful looking.
Nice setup, love the triple belt drive.

 

If you are using a Cragar drive with V Belts, why not run 4 Strombergs to keep the traditional look?

 

If I could find an Original 2x4 intake for strombergs I might think about it. Wont put a milled or repoped one on it. That combo would be my go to 100% if it was a car from the 20-30's not sure if that's the right look for a 52 street rod.

 

I have a 177 Weiand Street Blower on top of my 400 SBC and ran a setup similar to this but I had Rochester carbs... I have since sold that setup with a 390 FE because it needed “something” and was a little roadster pickup with the engine exposed.

Vintage Speed sells a complete kit


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WOW I was expecting a bunch of opinions on this subject.

 

I like the looks of two Carters on a 4-71, and on my 6-71 I have two 600 Holleys, in line. I like the cleaner look of the simple linkage and fuel lines as compared to sideways mounted Holleys.

 

I was thinking about running two Carter AFB 9605S which i understand are 600cfm, and would keep the vintage look.