redhoss02

hey guys im new to this site and need a little info! i am in the process of swapping my 305 for a 350 tpi. and i think im going to need a new ecm. where can i get ahold of one and is there anything else i need to know about this swap? i have already bought new injectors so those are good! any info will help thanks guys.

69camaross

iTrader: (4)

Is the 350 TPI a stock L98 87-92 spec? If so all you need to find is a stock GM PROM "chip" from a same year car. 87, 88 (VATS), and 89 (cold start) will all be unique. 90-92 will use the same PROM.

You already have injectors which is the only difference in the TPI unit from a 305 to a 350 as they used everything else the same. FYI don't use anything bigger than a 24lb as with a stock L98 anything larger is overkill and may hurt performance.

Note**** the above info assumes that your car is currently a 305 TPI powered IROC or Z28, not a TBI 305 RS. If TBI, you'll need more parts.

redhoss02

thanks for your input i almost gave up! i am trying to get all my sensors hooked up and wiring harness ran and all connected but during the removal of the 305 tpi some connectors were pulled off and hmmmm now they are gone. this has been a long process so i have forgotten alot as far as where things went. if i knew someone local i could take pictures from under the hood that would be perfect but i dont. so any help would be greatly appreciated. thanks again!