Boost Compensation tuning explained (again) MicroSecBit too!

[Gordo]

I have my car running fine without microsec and comp boost.

When I adjusted comp boost from 75 to 25 the biggest issue was hot-start.  Cold start was just fine, fired up and rpm hit 1400rpm.

But when it is hot, it might crank excessively or I have to give it throttle while cranking to get it to fire up.  In the odd case it fires up without throttle, it will stumble really bad at very low rpm (200) and then I have to either throttle to bring it back up or it might just come back up on its own.

I played with Crank Inj Time table.  Its at 35 now and after changing microsec from 75 to 25, I raised it up even as far as 200+ and it did not make a difference.

What else do I need to adjust?

[Concentric190]

anyon have a finished boost comp map i can take a look at?

[Gordo]

My cal file just before selling the car.

Setup (the important bits):

1998 SR20DET, GM 3-bar map, GM IAT, 740cc Nismo

With Microsec adjustd I believe.

[TheBoz2]

I have a Hybrid Boost Comp Map for a 1st Gen DSM.

http://forum.aempower.com/forum/index.php/topic,26131.0.html

It is for California 91 pump gas, and has been tested up to 18psi with 10.5-11.1 afrs, and great knock.  I am still working on the low load and vaccum parts of the map, but the boosted parts are looking really good.  I just turn the boost up and the AFR's stay where they were at 10psi.  I love boost comp, it is very fast to get your car running awesome.