Re: Engine swap computer & wiring question

[Todd Israels <israels@mnsi.net>]

At 03:27 PM 7/12/00 -0700, you wrote:


> Hi Tim,
>
> I read what everbody else has to say about this - and since I have a soft 
> spot for the GTs - I'm gonna throw in my two cents.
>
> First of all, you made an statement about the similarities of the engines, 
> which Bruce called you on.  I think you're right, it *must* be possible, 
> but the little things that you don't see coming *will* screw you up.  For 
> instance, if going to 5-spd, you'll need to get new motor mounts or your 
> drivetrain will be crooked!
>
> As for your actual question, I think the general concensus around here is 
> to stay as far away from OBD as possible.  It'll cause you a boatload of 
> problems and the seqential fire really won't buy you a whole lot.  So...
>
> Having considered this swap myself, I decided that the best thing to do 
> would be to use the wiring and ECM for a 3.1 (7730).  Because the 3.4 is 
> basicaly a bored 3.1 you should be able to keep the wiring close to stock.
> The cal will be close (closer than 2.8 anyway).  The 7730 is pretty well 
> known around here and you should be able to get help with the software.  I 
> have done some work on the V6 code and know that a few others have 
> too.  So with a little diligence, accomodating .3 liters and better head 
> flow shouldn't be a problem.   Running a Getrag 5-spd with OBD II, 
> however, sounds pretty scary.  Uh, you are doing 5-spd right?  'Cause I 
> hate to see you do all this work for nothing ;)
>
> Oh, one more thing.  The 7730 is good, also, for when you turbocharge that 
> guy!
>
> Jeremy
>
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        When the Z34 Lumina used the 3400 Twin cam that engine was also 
used in the Grand Prix and there was an option for a 5 speed stick but it 
was not very popular and is hard to find(next to impossible).  As far as I 
know the strongest manual transaxel GM made.

                Todd Israels


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