[Diy_efi] Converting from Carburation to TBI

[Scott Peitzsch]

>> You're looking for a setup from a '77-79 Cadillac Seville with the
>> fuel injected Olds 350.  It used an analog fuel injection system with
>> some fairly high flowing (~38#/hr or so) low impedance injectors.
>> I recently help a friend troubleshoot a few electrical gremlins on
>> one (in his case, a '77) as NONE of the local mechanics would even
>> consider touching it.
>> 
>> -Scott
> 
> Scott,
> 
> What I've read indicates that system had one injector per cylinder, more
> of a tuned port thing.  I'm looking to go to TBI, not TPI.  Perhaps I'm
> wrong.
> 
> I can understand why none of the local mechanics would touch it.  If you
> have oportunity to take some digital pictures of his setup, I'd sure
> love to see 'em.
> 
> Thanks,
> Dan

You're correct, this system has one injector per cylinder, but it does use
a throttle body that is quite similar to other "traditional" TBI setups.

Just out of curiosity, why wouldn't you be interested in this type system?
The throttle body is in the same location as a traditional carb, making
placement/fitment of the air cleaner a non-issue.  Either swap will require
a new fuel pump/setup, with the only significant difference being fuel
pressure.  Both TBI ECMs (like the 1227747) and TPI ECMs (like
the 1227727/730/749) are abundant in junkyards and well hacked.
If you're going with a homebrew ECM, neither is really a problem.

In your application, what's the benefit or motivation for considering
only TBI?

-Scott