Identify this carb - Team Camaro Tech
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post #1 of 6 (permalink) Old Sep 10th, 05, 02:33 PM Thread Starter
 
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Identify this carb

Alright. How much CFM would most likely have been on a Rochester 4-bbl carb on a 327cu-in engine. Cause my uncle has the carb, he just doesnt remember how much CFM.

Also, what would be the right CFM to get for that engine. 1968 327cu-in .30 over with 350cu-in valves. He also says the heads are 350 but I think he is pulling my chain on that one.
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post #2 of 6 (permalink) Old Sep 10th, 05, 03:06 PM
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Tom
 
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Re: Identify this carb

on a 327 ? I would say a 600 or a 650. The newer Holley 670 would be ok too.

69 Camaro -originally a LM1 car. 327, Edelbrock E-streets, hooker, DUI performance distributors, ultradyne cam, stewart, TRW etc. Vintage Air, AGR steering, Corbeau GTSII seats, 700R4 transmission, 12-bolt w/Eaton 4.11:1
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post #3 of 6 (permalink) Old Sep 10th, 05, 04:39 PM
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Wally
 
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Location: Frederick Maryland
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Re: Identify this carb

Quote:
Originally Posted by crackyflipside
Alright. How much CFM would most likely have been on a Rochester 4-bbl carb on a 327cu-in engine. Cause my uncle has the carb, he just doesnt remember how much CFM.

Also, what would be the right CFM to get for that engine. 1968 327cu-in .30 over with 350cu-in valves. He also says the heads are 350 but I think he is pulling my chain on that one.
My 67 327 in the chevelle has a Qjet, they ar 750 cfm and set up right kick Mr. Holley in the a$$, IMHO.

Gold 67
M.C.C. 559
1967 Malibu
1971 Malibu

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post #4 of 6 (permalink) Old Sep 10th, 05, 06:36 PM
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Bill Miller
 
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Re: Identify this carb

They only made 2 sizes 750 and 800 CFM. I think the 800 was only used on very large engines. It should be a 750.

1969 RS convertible 327 1981 Z28 original unrestored
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post #5 of 6 (permalink) Old Sep 10th, 05, 08:16 PM
 
Join Date: Apr 2000
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Smile Re: Identify this carb

You tell the difference between the 750 and 800 cfm Q-Jets by looking in the primary, small, bores for a little bump way down inside the venturi's.

The one with a bump in each bore is an 800 cfm carb. Btw, the bumps are like a third of a dime sticking out on the venturis.... Sorta deal is all..........

Look close!!

AND yes, 800's came on the 454 and 455 (CBOP) and 472/500 (Cad.) GM motors

pdq67

PS., and I think a Q-Jet is a very under-rated carb. too.....



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post #6 of 6 (permalink) Old Sep 11th, 05, 02:14 PM
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Wally
 
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Location: Frederick Maryland
Posts: 91
Re: Identify this carb

PS., and I think a Q-Jet is a very under-rated carb. too.....

Yep, I went real quick with a Qjet on the Vega, 9.80/136mph. Not to shabby!

Oh yeh, it was a 364 ci small block, power glide and a 4.88 gear.

2450 pounds.

Gold 67
M.C.C. 559
1967 Malibu
1971 Malibu

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