Twin Garrett GT2871r
 

Hi, I have a twin turbo kit that rps made 5 of. I'm upgrading the turbos to gt2871s. I have a 94 auto twin turbo. The gt2871s i'm using have a .64 hot side. Does anyone have any idea what kind of hp and response I can expect?

Is that RPS twin kit sequential or parallel?

Twin gt2871s
 

They both run at the same time. They are mounted on seperate tubular exhaust manifolds.

Based on some quick research, I'd estimate that setup would be good for about 680rwhp at mid-boost levels (mid, for an mkiv is 24psi-ish) on race fuel (of course), with the oem cams, through a 6spd. If you upgrade the cams to 264s or 272s, and run high boost (32psi+) with very high octane race fuel you'd probably get close to 800rwhp through a 6spd.

As far as response, you won't see much useable boost below 4000rpms.

Of course, these estimates all assume your engine is in good shape.

FYI: Here are a few of the links I used for my estimates:
http://www.tweakit.net/shop/product_...oducts_id=5888
http://www.elitedubs.com/index.php/t....msg18582.html
http://www.ztechz.net/id1.html

GT2871s
 

Hi, thank you for your valuable information. I can't wait to get them on. Do you know of a source for earl's pre made stainless steel hoses?

Unfortunately no...but it's relatively easy to put the ends on yourself if you have a dremmel or die-grinder (for getting a clean cut), and some fibrous packing tape (to hold the strands in place while you put the end on).

wondering
 

How much hp can an automatic tranny hold before you should start looking into beefing up the tranny? And I guess the same goes for a stick? What kind of hp can a stick hold? And last bit, driving a manuel with a single turbo, pushing over 500, does that require a certain level of skill? To me it would seem thats not something you can just get up and go do. Correct me if I'm wrong.

The oem TT auto tranny can hold about 500rwhp, depending on how hard you drive it, and what kind&size of tires you run.

Yes, 500rwhp+ with a 6spd does require a certain level of skill. A forced-induction vehicle is variable-horsepower (depending on boost level). If boost hits while you're cornering, it's almost completely unmanageable. With lots of track time and lots of patience you can learn to keep it off the walls...

gt2871
 

Everthing is starting to come together but i'm not sure what size an hose I should go with for the watercooled turbos? Just bought 2 10 pound nitrous bottles. Anyone have any experience with a 2 stage setup?

3/8" (-6AN).
Yep.