I recently bought my first camaro for $600 bucks.it came with a T.B.I. 305,but i went to the junk yard and found a T.P.I.305,its pretty much complete and i want to swap them.I still want to have a daily driver but i want to add some performanceparst to the engine where would my money be best spent?

 

Getting the entire TPI engine, harness, exhaust, computer, fuel tank (at least the fuel pump), and everything associated with the TPI engine that's different from the TBI would probably set you back again as much as you paid for the car. It would be a decent improvement, though.

Improving that would probably be cheaper than trying to improve the TBI engine/system as-is.

 

i have a 90 rallysport camaro thats in showroom condition, its equiped with the TBI. i think its a great set up, its simple, efficiant,
and very easy to work on. but you would only get maybe a 5-10 hp difference. you could do a few things to the tbi to get that.

 

I think that I would take the TPI over the crappy heads and injection of the TBI anyday. Well, I think Iwould rather have a carb than either one though.

 

TBI 350 rated at 170ish HP
TPI 305 rated at 205ish HP
TPI 350 rated at 240ish HP

Personally, if I was you I wouldn't bother spending the money to go from a 305 TBI to a 305 TPI. I'd save my money a get a 350 TPI for probably around $100 more than a 305 TPI will cost you. THAT would be worth the hassle and expense of what you are trying to do, and would give you the best "bang" for your buck.

 

yeah.i think im going to wait till i get a 350block.i have been doing some reading since i posted the last tread and i no longer want to rebuild the 305 but now i got two 305 block's

 

Not sure what it would cost, but the 305 and 350 block is supposed to be the same. Supposedly, you can just bore out the 305 and turn it into a 350 - if you're going to build the whole engine anyway, you might want to do some research on that. Since you've already got two blocks, might be the cheapest way to go at this point. Don't know if it'll work, but if it was me I'd check it out.

 

The 305 cannot be bored out to a 350. It can be bored, at best, .060 over. That makes roughly 315, I think. The 350 and 305 share the same stroke (3.48). YOu can stroke the 305 to 334, but you will spend as much as you would on a 383, so why bother? Get rid of both of them and get a 350.

 

There you have it!

The 350 still sounds like the best route to me. Time to sell the 305's??!!

 

I think that i'ts time for me to look for a new block.just one more question.what year block should i be looking for?I've heard that it has to be one that had a roller cam.is that true?

 

'87-up have the roller cam and one-piece rear main seal. If possible, I'd try to maintain that.

 

thank's for the help.saved me from making another dumb mistake.I almost got a 350 from a 72 malibu yeasterday