AFC/MAFT needed with chip???

[90 GSX]

I have a keydiver chip (mods in profile) for my 550 injectors. My base timing is set at 5*. I get around 10 give or take 5 counts of knock at 11 psi. The only boost leak I have is at the shaft seals (not for long). Could that boost leak cause all that knock at such low boost? What should I look for. Believe me when I say this the car is built properly, with the best parts and all that. It runs very good, drivers excellent, makes no noises. Only recently my ISC went out (last week) and I am going to replace it when I do the shaft seals this weekend.

My main question is, do DSMs run well by themselves or do they need an afc/maft once you start tinkering with the car, even if you have a chip??

Are 1g timing maps the same as 2g timing maps? Could 5* base be too much? What should I look for here???

 

[DSM90AWD]

I have a keydiver chip (mods in profile) for my 550 injectors. My base timing is set at 5*. I get around 10 give or take 5 counts of knock at 11 psi. The only boost leak I have is at the shaft seals (not for long). Could that boost leak cause all that knock at such low boost?

Can you post a datalog showing knock, timing, O2, IDC% and Throttle Position when these knock events start? Also what do your LTFTs (Lo/Mid/High) look like?

My main question is, do DSMs run well by themselves or do they need an afc/maft once you start tinkering with the car, even if you have a chip?

I ran well for several years with a Stg3 chip and minor "tweeking" using S-AFC, but the S-AFC was not mandatory, just for fine tuning.

Are 1g timing maps the same as 2g timing maps? Could 5* base be too much? What should I look for here???

1990 Maps are <> 1991-1992 Maps which are <> 1993-1994 Maps which are <> 1995-1999 Maps. Jeff uses the 91-92 E931 Maps for all the 1Gs. He's also offers the "extended/optimized Maps" option which smoothes the fuel/timing maps and doubles each air volume plot (highly recommend this). You can also opt for the Phantom Knock option which ignores certain part throttle knock under low load.

5* BTDC is what the ECU assumes you are at. You should not have to tinker with it if set correctly