Thread: Semi turbo on grand prix gt?

Alright so I got to talking to my friend about turbo ing my 2001 grand prix gt. he said he can get me a turbo from a semi truck for $100. And he said is friend has done it and works good and he can put it in for me! But I might have to get different headers and then tune and get a dyno of it. Is this possible and safe for my car? I have 100,000 miles on it and it's in good shape just slight oil leak. Would it work from the same as a normal turbo?

ran one for years, made more power than 99.9% of the people that build "fast" cars on this site.

How much hp did it make?

Originally Posted by Kcgp

How much hp did it make?

125+ trap speeds, so idk, 430whp? I spent less than $500 putting it together.

Wouldn't that make the transmission go kablooey?

Damn alright I'm doing it haha what all supporting mods do I need? And so total you'd have around 325hp?!

Originally Posted by Kcgp

Damn alright I'm doing it haha what all supporting mods do I need? And so total you'd have around 325hp?!

Well, a built transmission for one...

So I'd have to get a new transmission too?

Or beef up the current one...I know nothing about tranny's though...I've never even BEEN to Thailand...

Yeah I'm only wanting to spend tops 1000

It's a GT, so wouldn't he also need exhaust upgrades like the top-swap guys have to do?

cheap injectors and a cheap walbro fuel setup will do 375whp pretty easily.... $200 there.
wastegate/bov/intercooler/install kit will run you about $300 on ebay prices.
A wideband is a good idea, not needed.
I ran a bone stock trans in a lighter car running really low 11s, so you really dont need a trans if you are not a stupid asshole that doesnt know how to drive a car making power.
Tuning is cheap, and you dont really need to even tune anything if you keep the whp under 375 (17psi) and run on a stock LT1 maf.

ghetto turbo kits have been done often, on stock transmissions... they work fine and are really easy to do.

...sub'd. this should be interesting