[Diy_efi] Converting from Carburation to TBI

[Wallace O. Powelle]

If I'm not mistaken the 307 & 350 Olds were never available with TBI, the 
last ones I saw were feedback carbs.  The Seville with the 350 Olds block 
may have had special heads for the port injection setup.  Just my feeble 
memory, Wallace
----- Original Message ----- 
From: "Scott Peitzsch" <jlg-sep at comcast.net>
To: <diy_efi at diy-efi.org>
Sent: Monday, July 17, 2006 8:13 PM
Subject: Re: [Diy_efi] Converting from Carburation to TBI


>>> 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
>
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