Looking for some imput , I have a 91 RS camaro 350 tpi from an 88 6 speed from a 95. The 91 is currently a 305 tbi 5 speed , was looking online found a guy that does tpi stuff wiring harness etc . He says can convert my tbi 5 speed harness and computer to run a 350 tpi , anyone done a similar swap suggestions ? Better options?

 

No change to the wiring is required for a 305 -> 350 swap, if you use the same intake. (no 9th injector change, no MAF add/delete, etc.) You may - more likely, will - need programming changes, but not wiring. Going from TBI to TPI or vice-versa of course opens a whole other can of worms. Not so much in terms of functionality, but rather more a matter of where things are, and how many of them... for example the TBI has 2 injectors and they're on top of the center of the intake, whereas the TPI has 8 and they're down the sides. It boils down to a matter of, in this case, tying 4 injectors on each side in TPI, to the 1 on each side in the TBI. Most of the wiring things are along that line: the differences are mostly out right at the ends.

For the T-5 -> T-56 swap, no change is required, except for whatever you might need to do for the different VSS. Different years of TPI & TBI cars used VSS outputs of 2000 or 4000 pulses per mile. The T-56 AFAIK all used 17000 pulse per mile. The T-56 has acoupla other electrical things, that can largely be ignored, if you so desire. (reverse lockout and such)

I see no reason that your harness can't be altered per your swap specs to give acceptable results. As far as "a guy", who knows. But it's not rocket science or anything, it's just a CAR, doesn't get much simpler than one of those, so it's not at all impossible that "a guy" would know the right things to do. There's A BUNCH of people right here on this forum that do, for all I know "a guy" might even be one of them.

 

Yea I heard of a guy that went by Pocket that did harnesses on here but I don't know if he still does them ,hasn't answered my messages if he ever got them? Anyways yea I don't mind spending the money to get someone to get me a plug and play harness and ecu , I have so much to do I need to take a few short cuts.

 

Repin the ecm to a 1227730 speed density
https://www.thirdgen.org/forums/tpi/...d-density.html

 

That helps thanks!