Dual TBI units

[Frederic Breitwieser]

There is no reason why you can't do this.

Carbs and throttle bodies are nothing more than holes in the engine for air
to go in, and if you size the holes the same as the original EFI setup, as
well as size of the injectors (sum of all injectors) to be about the same
size, the ECM can compensate.  of course, a batch fire system is easier to
fangle, as all the injectors left or right will fire together, and slight
mismatches aren't that noticable.

Use the V8 ECM on a V8 engine, because the sensors (crank/cam) will fit the
timing code in the ECM, and you can adjust the injectors appropriately.

In a batch system TPI system, lets assume you have 8 injectors on a 350,
which are 22lb injectors.  If you want to run six injectors, one per side in
each of the three 2bbl throttle bodies, you'd multiply 22 x 8 which results
in 176lbs, divide by six, which would be 29lb iinjectors, assuming the cam,
timing, displacement, etc, are all the same.  Of course these calculations
don't take the runner length changes or the curveture of said runners into
consideration, but its a reasonable starting point.

-----Original Message-----
From: mswayze at truswood.com
To: gmecm at efi332.eng.ohio-state.edu
Sent: 12/16/99 9:56 AM
Subject: Re: Dual TBI units


I got to thinking about this the last
time this subject came up --only I was
thinking about 3-2bbl setup with
progressive linkage(tps hooked to
linkage instead of throttle body) and
using a v-6 port computer. cute???
(my $.02.)
byE
Mike

Frederic Breitwieser wrote:
> 
> Well, that depends how "cute" you want to be.
> 
.......
> lurking for quite some time now and while most discussions are over my
> head, I
> am picking up some here and there and will continue to try and learn
> from you
> guys!
> 
> Thanks in advance,
> Stephen Cranford
> 92RS Purple w/White Stripes
> 86IROC-Z Red w/black hood
> 
> http://cranford.home.texas.net
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