[Diy_efi] Using Ford TB

[Chris Carson]

Hmm, then it looks like it's good to go. Any idea what kind of numbers the
5.0 throttle body flows? If it's not too much less than the 4.3 TBI then
I'll stick with it.
And about the external IAC...was it the Turbo Regal that used it? That
sticks in my mind.

Chris
----- Original Message -----
From: "frederic" <frederic at midimonkey.dyndns.org>
To: "A list for Do-It-Yourself EFI" <diy_efi at diy-efi.org>
Sent: Thursday, April 15, 2004 10:37 PM
Subject: Re: [Diy_efi] Using Ford TB


> > Continuing on the trek to EFI an Olds engine...In my quest to find a TBI
throttle body that's less than $30, I was offered a 5.0 Ford throttle body
for free. Does anyone know anything about these? Would the TPS/IAC be
similar enough to communicate with the GM ECM? And do they flow similar
numbers to the 4.3-5.7 GM throttle body? And why on earth can't I find a
cheap GM TB???????????
>
>
> The ford throttle body TPS should be the same as the GM, at least close
> enough it will work.  The TPS on my 89 460 feeds the GM ECM just dandy
> (730 and 749).
>
> The IAC is a little different.  GM uses a true stepper motor, with four
> leads, as two windings.
>
> The Ford in contrast, is more like a solenoid.  Pulse it faster and it
> opens more, pulse it slower, and it closes more.  Remove power completely
> and it springs closed.  The GM unit, when you remove power, stays in
> whatever position it is in.
>
> Funny that you asked about it, I just tested all this today, as I'm trying
> to graft a 749 to a Ford 460.  I concluded that I'd have to make a 1/4"
> thick steel plate and use a GM IAC with two angled holes, and bolt that to
> the Ford intake across its too holes.  Ford gasket on the bottom, GM
> gasket on the top.
>
> Also, some GM cars have remote IAC with hoses, if that helps you.  I have
> one, but I can't recall what its from quite honestly, been in a box for
> about six months.
>
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