TrustS13

I really need some assistance on setting the ignition timing to 15* BTDC on a stock S13 SR20DET.

I know it needs to be set to 15* BTDC and I know this is the second to last mark on the crank pulley. I have marked this with white out and have access to a timing light. My problem is this, what is the best way to set the ignition timing? When I set the timing by attaching the pickup for the light to the 1st coil pack, and the MAF is plugged in, car warmed up, the signal is somewhat jumpy, but when i adjust it to 15* on the crank, the CAS is maxed out almost all the way advanced (no gap between the CAS adjustmetn and where it bolts to it, its maxed all the way out almost).


If I unplug my MAF and set it to 15* it has a very smooth signal and it appears to be in the right area (the CAS is adjusted slightly advanced and there is a small gap between where it bolts to the head). I have read to unplug the TPS, rev it a few times to lock it in timing mode, then time it off the black wire in the back of the motor on the coil pack harness?

I'm really confused. Also, I know how to remove the valve cover and put the CAS back in that way (like the FR sport guide How To Set Crank Angle Sensor (CAS) Timing on the SR20DET Engine)

The main reason i ask is because currently my car has a Gt2871RS .64 set to about 9-10 psi. The downlow power just feels slow compared to my friends stock T25 car. He has a stock redtop and has never adjusted the timing. His car feels like it pulls harder down low and even when he is WOT past 5500 rpm, his car just feels awesome and we have very similar setups. I'm not sure if the lack of downlow power on the 2871 is from my timing or just because its that much larger than a T25?

My specs are
Stock S13 SR20DET redtop
GT2871rs .64 stock manifold
Brand new wiring harness (helped with idle and overall smoothness of car)
FMIC
3" turbo back
pretty standard, stock MAF, injectors and FPR

This is the only video I have of the car running/driving around.