I have a 305 tbi v8 and I wanted to switch it to a 350 TPI, what do I need to change? and do I need to change the fuel delivery? sorry if its a repeat question

tim

 

You need to change everything that's different between TBI and TPI.

That includes the entire induction system, upper radiator and heater hoses, throttle cables, air cleaner system, in-tank electric fuel pump, flexible fuel lines, ECM harness, ECM, knock sensor (and module, depending upon the year of the TPI). TPI also had dual radiator fans (most years).

Have you located a 350 TPI? If so, how complete is it?

 

well I was thinkin of grabbin one from hawksthirdgenparts b'cause their close but one of my friends who has 30+ years of experience workin on cars said it might be easier to get a crate enginethats the same size or bigger, so I dont know

 

Hawks will treat you right.

As for a crate engine, depends. You aren't going to get a TPI set-up with a crate engine. If you stay with TBI on a crate engine, the TBI system is going to need upgrades.

 

Would it be easier to stay with a tbi setup and a crate engine or should
i go carbed, which is easier?

 

What are you after? More street legal power?

A 350 TBI can accomplish that. A Hawks 350 TPI pull-out would probably be a lot easier to do (and perhaps less expensive).

There isn't a legal carb that you can install in a 1990 chassis.

 

im in the same boat..i posted something up in the TPI section but got no responces
five7kid what do u mean about the fuel lines having to b changed...are you talking about the the hard lines that run from the tank to the engine bay or just the engine bay to engine?

 

The soft lines, chassis to engine.