By the way, with an F-MAX manifold, FMIC, 3" exhaust, and JWT cams, there is a quick rule of thumb for calculating how much power is made at certain boost levels.
With this setup, it seems that the power increase rises almost linearly with boost pressure increases. Having looked at the dyno results of several SR20DEs with the above setup, the average hp gain per psi of boost is right around 13 hp/psi extra.
For example, a stock SR20DE puts down about 120 hp to the wheels. Install the above setup and turn up the boost to 10 psi.
10 x 13 = 130 hp extra
130 + 120 = 250 hp to the wheels, which is right about how much an F-MAX equipped SR20DE makes.
At 15 psi, you get about 315 hp to the wheels.
And, at 20 psi, you get about 380 to the wheels.
Remember, this is with the above setup and the turbo I spec'd above also. This is to be used *only as a guide* and may be different for different cars in different states of tune.
Variables may include:
headwork, lightweight flywheel, open exhaust, divorced wastgate to atmosphere, high powered ignition, etc...
Rememberm, this is just a rule of thumb, but it will get you in the ballpark at least.
I plan to plot my dyno results as a function of hp vs. boost pressure to see how linear it is on my GTi-R motor. I am thinking that the specific output of the GTi-R head will be greater than the SR20DE's, but I will just have to wait and see.
Good luck,
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Jay Whitely
Tampa, FL
1996 200SX SE-R
GTi-R powered with F-MAX kit