Throttle body Injector interchangeability (GM).

[Bruce Plecan]

----- Original Message -----
From: Rich Vandervoort <richvandervoort at hotmail.com>
To: <gmecm at efi332.eng.ohio-state.edu>
Sent: Friday, April 16, 1999 6:58 PM
Subject: Re: Throttle body Injector interchangeability (GM).

I do beleive the 7.4 with the dual 2" butterflies are the 670 CFM.
Not to be confused with Holleys new idea of injector sizes, and referencing
that ot CFM some how....
Bruce

> Well I thought the 4.3, 5.0 and 5.7 was about 400 cfm.  I guess I
> should have checked the archive instead of trusting my memory.
> <snip>
>
> > 1 Barrel - 300 cfm (4cyl engines)
> > 2 Barrel - 400 cfm (2.8L 6cyl engines)
> > 2 Barrel - 670 cfm (4.3L, 5.0L, & 5.8L engines)
>
>              Gadzooks, what have you done to need that much air?
>              Bruce
>
>              > I am thinking about putting on a throttle body with the
> 7.2 liter bore
>              > sizes on a 94 4.3 v6.  The flow rates of the injectors
> are in the
>              > archives(I'll probably stick with the 4.3 injector
> size). What other
>              > interchangeability issues exist with the different year
> and model
>              > applications for the TBIs?  Does anyone have a good set
> of equations
>              > for calculating intake runner and plenum volumes?  Has
> anyone had any
>              > experience with the Edlebrock TBI manifolds or the TBI
> to port fuel
>              > injection conversions?