305 tbi cfm
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Junior Member
Joined: Oct 2006
Posts: 98
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From: Grand Forks ND
Car: 1989 Camaro RS
Engine: 305 V8
Transmission: Auto
305 tbi cfm
i was wondering how many CFM our stock 305 TBI's flow i saw we can get 5% more by doing ultimate TBI mods but thats 5% more from what baseline?
Supreme Member
Joined: Jan 2007
Posts: 1,873
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From: OC CA
Car: 75 Beast
Engine: 383 +EBL Flash
Transmission: 700R4
Axle/Gears: 4.11 with 33"
Re: 305 tbi cfm
All SBC TBI (4.3, 5.0 and 5.7 L) share 43mm (1-11/16") bores and flow about 490 CFM. There was a big discussion a while back regarding how this flow rating was measured. In grand scheme of things it's adequate for most stock to near stock street SBC's.
//RF
//RF
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