Master Power Super T 70 with .68 A/R Turbine Housing for
Is that .68 too small for a ported S5 TII?

 

depends on how much boost you want to run, and where you want the boost to hit

 

.68 is a small hotside, it is mainly for quick spool(auto-x and hillclimbs)

~.96 is an interim and what most rotary owners will use, spools a little slower but peak power is around the 7500RPM range

1.15 and higher is a dyno queen turbo, slow spool but big numbers

 

.68 is pretty small. I wouldn't expect to make alot of power with it, but as Karack said, you'll make a nominal amount of power very quickly.

 

i wouldn't call 400RWHP+ any small amount though, i have that turbo as well and it is hardly anything to laugh at. (though i opted for the .96 hotside)

i have begun tuning one with this exact setup and .68 hotside and it was fully spooled by 3500, which is not bad considering it is a big turbo and is not ball bearing.

 

max boost 14 psi
w/o too much lag

 

should do about 350 to the wheels at that with full spool around 3500. the turbo is capable of 600WHP with a large hotside at 30PSI they claim.

 

i would of expected it to be a little more in the 370 ish range. Interesting. Thanks for the info

 

those are just guesses since with each setup the power put down will vary, that hotside is not designed for power, it's designed to spool the turbo quick.

 

Wow 350-370whp @ 14psi spooling at 3500rpm? Is that getting close to the max efficiency range of the .68 hotside, or would you have a little headroom left? I'm surprised at even those numbers from such a small turbine. "Small" being a relative term of course.

 

I was making 380-390rwhp at 13.5psi on the MP T-70 back in 05' and 480rwhp@19-20psi.

 

what back side?

 

.96