Hey all..n00b here..would like some build up advice

[snatchSS454]

Sorry about the post "lag", Ive been real busy. John just to make sure you know, I meant that the block has the same locations for the mounts, I just have to use my RWD mounts as opposed to the FWD ones. Hope that clears it up for you.
Now I have spoken to the person who Im buying the kit from and he stated that those are the appropriate specs for the turbo althought he didnt have a P/N to make sure it was the correct Garret turbo.
I have also spoken with someone who is doing the same project as mine and we swapped turbo specs and he has a smaller turbo(.50 compressor .82 exhaust 57 wheel trim) and runs 12.6 1/4 at 106mph at 7psi. He thinks that my turbo might be too big. I was kind of looking for some opinions from you fellows/ladies on the performance of the TA-49 or TE-44 with a Spearco Intercooler 30x6x3, ported heads and intakes, 3000 stall, 3.42GR, 8.5:1CR. Whats the lag gonna be like in street trim(ie. 93oct, 15psi)? Also is it true that the TE-49 has a sweet spot at 22-25psi?
Sorry for the a$$load of questions!
Thanks,
Shane

 

[JDEstill]

Hi Shane, thanks for the motor mount info, that makes sense.

Can't say anything about the intercooler. Turbo, since you are running the same displacement as us, same CR, similar boost levels and presumably similar rpm limits, as a matter of fact just about everything sounds the same as a GN, then I've got to say that I think you'd be real happy with a TA-49/TE-44. I wouldn't expect one of those turbos to be laggy at all, esp. with a 3000 stall. It ought to really get up and go. Anything that works on our cars ought to work on yours as well.

I wouldn't go smaller. Matter of fact, with ported heads and such, you might could stand to go bigger if you are thinking about running big boost in race trim. Now if you were only going to run 7 psi, then yeah, that would be too big. But if you are planning on running 15+, you need something that can move more air. The ideal turbo for 7 psi is different than the ideal 15 psi turbo, which is different than the ideal 25 psi turbo.

That being said, the turbine side is going to affect the lagginess more than the compressor side, and it's hard for me to tell exactly what that turbine you've got is and how it will work. It's not a real exact science anyway. I would say just go ahead and give it a try, and then swap it for a TA-49 if it doesn't run like you want, except that 4 bolt housing throws a monkey wrench in there - not to easy to bolt on a GN turbo with its 3 bolt housing after you've got your headers set up for the 4 bolt. So, you probably need to talk to a real expert (instead of us internet experts) to set you straight.

John

 

[snatchSS454]

Update...

Well, I received the turbo today(Garrett). The compressor cover is a .50 A/R and uses a .82 Lotus T3 turbine wheel that was machined to work with the kit. It is internally gated and uses a v-band discharge, 60 trim compressor and a p trim turbine. Still waiting on the piping and intercooler.
I have my ported and polished heads and intakes waiting. Im trying to dismantle the l67 shortblock to be machined and hottanked. Im probably going to buy forged diamond 8:1 or 8.5:1 CR pistons and I might bore it over .010. I will porbably have the whole short block cryotreated(cheap price so I might as well). Im thinking of paying 600 bones to have some turbo headers made, do you think thier will be a significant gain over Turbo forward swept log manifolds over mid length headers?
Well thats all I have for now.
Shane