RedRS90

Hey everyone, I already have the TPI setup, I would just like to konw what I will need besides the engine wiring harness to convert over to a TPI, the TPI is an 85, the Engine Block is a 90. Do I need a different Cam to expect the same amount of horsepower as the IROC's? or is there a Better cam that I could use to get more HP than the 305 IROC'S?

91banditt2

iTrader: (1)

you do know that you will have to modify the four inner bolt holes on the intake base right?

gettaway305

I hope you have a new ecm and all the sensors for the harness too...

Also I believe you need the TPI fuel pump

FLYNLOW92rs

iTrader: (53)

The tech article on the main page has a list of all the parts you need for the change.......

RedRS90

well I, guess I do now, is that gonna be hard? I mean I was told that it should just swap over easily, it may just be easier to rebuild the 350 and drop it in

r90camarors

Some people say the swap is worth it, others say it isn't. I don't know anyone personally that has done the swap so I can't say. My opinion would be to stick the TPI on a 350. Is it a stock tpi, or has it been modded to breath? If you decide to put it on your 305 L03:

TPI is stock and you plan on leaving it that way: You can use the stock TBI cam. The TBI cam is weak hp wise and dies out around 4,500-5,000rpm. A stock TPI can only breath to about 4,500rpm, so it should match up, and you should feel more mid range torque.

TPI is modded to breath or will be in the near future: Swap that old peanut cam out for a real cam!