Faster Is Faster

To4B A/R 1,15
HKS cast manifold
RB street port
3" exhaust
...and the rest of it..


What kind of spool up should I expect(full boost rpm,max rwhp@~14psi etc..)? What do you think of turbo A/R is it too big/laggy for rotary?

Infini IV

What trim T04B wheel? If you don't know what trim, what are the measurements of the wheel?

Also, 1.15 turbine housing A/R is a divided housing. If coupled with the HKS cast manifold (which is collected), it would take longer to spool your turbo than it would if you just went with a collected turbine housing. I would suggest a .96 turbine housing A/R.

Assuming you are getting the largest T04B wheel (Super H), you should see around 350-380rwhp at 15lbs boost. I'm not sure what RPM you'll see full boost by, but I'm guessing not any later than 3,800 with a .96 housing.

10thAnivTurbo2

i had pretty much the same setup, and i didnt see 10 psi till little around 4000rpm(9.7 psi spring, boost controller turned off), the 1.15 does have a lot of lag, the .96 is prob the best sized exhaust housing for spool vs. top end restriction.