My A-Spec 500R Kit Dyno Charts

[TurboSquirrel]

Originally Posted by cewrx7r1

The boost curve is sloppy like your EBC is not functioning too well or not properly hooked up. It spikes and then drops off erraticaly.

Mine did that when I first hooked it up. Then I tried hooking my EBC differently than the manual showed. If you use the turbo outlet as your boost source for both the WG and EBC, then it senses a higher base pressure than the controlled pressure source. This is caused by the pressure drop in the IC.

I take my pressure source from my Greddy TB elbow and that "Ts" into the WG side and WG solenoid input. The IC also acts like a filter to smooth out fluctuations.

This made a great improvement in my boost control. You might also need to experiment with the GAIN to obtain the quickest spoolup that does not either cause spiking or boost start to increase.

You max HP was produced at 15 psi boost. Thus if it stayed at 16psi, you would have made maybe another 15 HP.
"Ray said I was making about 15HP / pound of boost."

Thanks Chuck, your guide has been invaluable to me learning this stuff and helping tune my idle / cruise! I'll see how adjusting the gain helps spoolup.

Quicker spoolup is my main goal.

I'm using an old Profec-B with the solenoid pressure sourced from the UIM. The "OUT" side of the EBC solenoid goes to the top of the WG, and the side of the WG is being sourced near the Compressor before the intercooler.

Previously, I had the side of the WG pressure source coming from the UIM and I would get boost creep consistently. Have not seen any creep since sourcing from the compressor.

Thanks

- Kevin

[dregg100]

Originally Posted by TurboSquirrel

Thanks Chuck, your guide has been invaluable to me learning this stuff and helping tune my idle / cruise! I'll see how adjusting the gain helps spoolup.

Quicker spoolup is my main goal.

I'm using an old Profec-B with the solenoid pressure sourced from the UIM. The "OUT" side of the EBC solenoid goes to the top of the WG, and the side of the WG is being sourced near the Compressor before the intercooler.

Previously, I had the side of the WG pressure source coming from the UIM and I would get boost creep consistently. Have not seen any creep since sourcing from the compressor.

Thanks

- Kevin

get rid of the pressure source from the intake manifold. run pressure from the compressor housing to the "in" on the profec and run the "out" to the side port on the wastegate and leave the other port open(could be the other way around for the the wastegate, i cant ever remember)that could be part of your problem, but damn, that is absolutely horrible for response. when i had my regular 35r on a stock port engine with the 1.06 housing i was seeing 18 psi by~3800. the 500r just has a differend comp wheel if im not mistaken. that just seems really odd, especially for a ported motor.

have you checked all your intercooler piping for leaks? intake gaskets?

:edit: just read the above post copied from the other forum. the sp has a different hotside, but is getting better response than the standard 500r according to sean. so you should be hitting 15psi under 4k no problem.