Head Flow Info (and TBI)

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Jul 24, 2007 | 07:12 PM

Dale

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From: AR

Car: 1991 Camaro RS Vert

Engine: 350 S-TPI

Transmission: T5

Axle/Gears: GU5/G80/J65

Head Flow Info (and TBI)

Trying to find some specs to put into engine simulation.

First, it appears the stock TBI unit flows around 450-500cfm?

Next, trying to find some stock head flow numbers. Mainly swirl port 810's since thats what I have. Somewhere I know there is a thread with lots of head flow data, but I cant seem to find it when I need it

Can someone link me please, or tell me key words to search on.

Jul 24, 2007 | 08:34 PM

onebad89RS

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Joined: Jul 2006

Posts: 186

Likes: 4

From: waterford, MI

Car: 89 RS

Engine: 305 carbed

Transmission: 700R4

Axle/Gears: 3.42 auburn posi

Re: Head Flow Info (and TBI)

https://www.thirdgen.org/forums/tbi/...-headflow.html this has some helpful information. doesn't have 810 heads on there but i know they don't flow very well. I too have a pair of them so maybe someone else has some numbers.

Jul 24, 2007 | 08:39 PM

Dale

Thread Starter

TGO Supporter

iTrader: (12)

Joined: Jun 2002

Posts: 6,819

Likes: 3

From: AR

Car: 1991 Camaro RS Vert

Engine: 350 S-TPI

Transmission: T5

Axle/Gears: GU5/G80/J65

Re: Head Flow Info (and TBI)

Thanks for the link, that was the thread I was thinking of!!

Found out the TBI flows 574.1

Jul 24, 2007 | 09:08 PM

Fast355

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Posts: 10,404

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From: Hurst, Texas

Car: 1983 G20 Chevy

Engine: 305 TPI

Transmission: 4L60

Axle/Gears: 14 bolt with 3.07 gears

Re: Head Flow Info (and TBI)

The 810s are just HD versions of the 193s. They flow marginally better than the 193s and have larger valve stems with sodium filled exhaust valves. My 810s also have intake rotators in addition to exhaust rotators.