Carburetor choice
Thread Starter
Racer
Joined: Feb 2010
Posts: 494
Likes: 0
From: Leominster MA
Carburetor choice
Ok before we talk about rebuilding a q-jet and all that, if thats not an option....and i have a SQUARE bore Edelbrock rpm intake, what carb would you choose?? Make model?? Thanks.
Melting Slicks
Joined: Oct 2008
Posts: 2,154
Likes: 69
From: Regina Sk Canada
Your only other choice is the eddy carb or a holley? Depends what the rest of the specs on the motor are, as well as the intention of the car.
If its a daily driver, i would go with a vac secondary carb, if its a performance application, then a holley dbl pumper is the way to go?
Size is determined by cam heads compression and the rest of the combo etc.
If its a daily driver, i would go with a vac secondary carb, if its a performance application, then a holley dbl pumper is the way to go?
Size is determined by cam heads compression and the rest of the combo etc.
Thread Starter
Racer
Joined: Feb 2010
Posts: 494
Likes: 0
From: Leominster MA
For now stock l-48 , probably getting a zz383 next year but for now Im looking for other options. That said, since the q-jet pushes 750cfm, would the wise choice be another 750cfm carb? holley 4160?
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
With a square bore one should size it properly to the engine, so many sizes are offered.
The GM solution
Q-J- Small primarys huge secondary. With the spreadbore the small primarys allow velocity, response & fuel economy while the huge sec. provide capacity.
Used on nearly all GM V8s w/ 4 bl. since made from about 300-500 c.i. Basically the Q-J sizes itself to the engine so the "750" rating is not being used on stock 350 like L-48.
CARBS Tests TQ/HP
http://www.corvettefaq.com/c3/carbcomparo.htm
For stock L-48, Holley 600 would do it.
For 383, in general Holley 750.
The GM solution
Q-J- Small primarys huge secondary. With the spreadbore the small primarys allow velocity, response & fuel economy while the huge sec. provide capacity.
Used on nearly all GM V8s w/ 4 bl. since made from about 300-500 c.i. Basically the Q-J sizes itself to the engine so the "750" rating is not being used on stock 350 like L-48.
CARBS Tests TQ/HP
http://www.corvettefaq.com/c3/carbcomparo.htm
For stock L-48, Holley 600 would do it.
For 383, in general Holley 750.
Thread Starter
Racer
Joined: Feb 2010
Posts: 494
Likes: 0
From: Leominster MA
So my question is how can i tell what cfm my stock carb was? The only mods i have made to this motor so far are the intake man, fuel pump, electric fan, headers/exhaust, msd dist.
That said still 600cfm?
That said still 600cfm?
Racer
Joined: Jan 2010
Posts: 367
Likes: 1
From: Christchurch Canterbury
I just bought a holley 4150 double pumper from summitt racing for my 350, think it was $323 brand new, 650cfm, if you are going 383 prob need a 750cfm. I have had these carbs on a 350 before, they work well, simple and proven.
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