CFM's

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Apr 21, 2003 | 09:43 PM

txhotRS

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Joined: Apr 2003

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From: Houston TX

CFM's

Does anyone know the stock CFM rating on the gm TBI set up (for a 305)... if I upgrade the injectors, the chip, and the manifold will it be able to support decent HP... 325+ ???

Apr 21, 2003 | 10:49 PM

vjo90RS8

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From: San Jose, CA

Car: 2002 Z28

Engine: LS1

Transmission: 4L60E

Axle/Gears: 3.23

if you are going to be running that much power you are probably gonna want either a 670cfm Holley TBI or a 454 TBI (600cfm). Both have 2" bores as opposed to the stock 1 11/16".

Apr 22, 2003 | 12:57 AM

Frik92RS

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Joined: Jan 2003

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From: Daytona Beach, FL

Car: Camaro RS

Engine: L03 305

Transmission: 700R4 Auto

Stock is 400cfm. The same unit used on V6s. It'll work fine for a stock motor but if you plan on running that kinda power you are going to need the 670cfm Holley unit.