Yes. The base kit has a 60-1, and the upgrade is a GT67 (search for this, I think I listed some info for this here in another thread). Not sure on all the other specs, but you can figure the turbine A/R will be pretty tight, like a .68.

 

is that .68 on the compressor or the turbine? and what is the a/r on the other?

 

Re-read please.

 

whoops sorry about that. i was just wondering how much their turbos would cost separately. thanks

 

Get in touch w/ Joe @ www.boostedsystems.com - he is on the Turbo Mustangs forum (which has an LS1, LT1, SBC, and other GM Turbo Tech section) and can get you a good price for either model. The GT67 (PT67) is not an inexpensive unit (about $975+), but the 60-1 is not too bad (about $580+). If you have enough airflow, I just saw a post for a brand new Master Power T70 in this forum for $500, which is a giveaway, although that unit would be better suited for a front mount as configured.

 

That $500 t70 is sold, but Joe sells them new for $700 I think with shipping.

Just out of curiousity why do you think that t70 wouldn't be good for a rear mount setup?

 

I think a T70 would be fine for a larger motor if sized properly. The one listed here is a .96 A/R, the 60-1 is using a .68. The T70 has bigger wheels and would need more air to spin them. The regular turbo sizing charts are not geared to the rear mount setup, since this is a new type of install it will be a while before anyone has published specific data.

For instance, the guy at Junkyardturbos has put a rear mounted Holset H2D on an '02 Z with a fairly stock LS1. I don't have any maps for this turbo & they list their specs differently than the other turbo makers, so I'm not sure how big this turbo is. He initially got 5 PSI with a few leaks, then over 10 PSI once the leaks were sealed (he states he has spent under $1K on the project BTW). There are no dyno runs on this setup yet, so we don't know how soon it spools or what it is capable of. For bang for the buck though, it is up there. His website is nicely laid out & he gives sources with links for almost all his parts.

I'm planning on running a 62-1 with "P" trim & a .68 A/R on the turbine on my 383. The nice thing about the T4 based units is the interchangability of the turbine housings, you can go from .68 up to 1.52.