Flow Rates

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Jul 17, 2002 | 03:39 PM

BillD91RS

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From: Boise ID

Flow Rates

What are the CFM on the stock TBI unit and the BB TBI unit????

someone please answer

thanks Bill

Jul 17, 2002 | 04:12 PM

My305camaro

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From: Yorktown, VA

Somewhere I've heard 410 cfm on the stock 305...not sure about the 454.

Jul 23, 2002 | 05:08 PM

camaro89rs355

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From: Paragould AR

Car: 89 Camaro RS

Engine: 355 TBI

Transmission: 700R4

im pretty sure that the flow on the 305 is 400cfm and the 454 is 670cfm like the holly tb.

Jul 23, 2002 | 07:23 PM

dimented24x7

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From: Moorestown, NJ

Car: 88 Camaro SC

Engine: SFI'd 350

Transmission: TKO 500

Axle/Gears: 9-bolt w/ 3.23's

ive heard 500 cfm for the stocker. Maybe someone knows teh exact number.

Jul 23, 2002 | 07:41 PM

Slade1

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From: Brampton, Ontario

I heard 480 CFM is the stock flow rate.

Jul 23, 2002 | 07:43 PM

kevm14

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From: RI

Car: 93 Caprice 9C1

Engine: L05

Transmission: 4L60

Axle/Gears: 3.42

Guys, I really don't think it's that good. My gut feeling is that the Rochester 220 flows more in the 300cfm range, and that's dry. Add some fuel and you reduce the amount of air going through there.

Jul 23, 2002 | 09:54 PM

dimented24x7

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From: Moorestown, NJ

Car: 88 Camaro SC

Engine: SFI'd 350

Transmission: TKO 500

Axle/Gears: 9-bolt w/ 3.23's

i looked at holleys page. They have a similar unit for 2.8s that looks like has the same tb bore size. Its rated at 400 cfm. Not quite that bad, kev, but bad.