I have a B20Z2 stock with B16 intake and big tube header. I'll be street tuning with Crome. I'm not sure how to tune the timing map. I feel pretty good about tuning wide open throttle, idle, and cruising. But what about the rest? What about partial acceleration? Is there a rule for the general shape of the timing curves? Any experienced suggestions will help.

 

I wouldn't bother with the timing maps without ear muffs.

 

That, virtual dyno, plus a good smooth and flat stretch of road.

It's going to be tedious and time consuming without some form of RTP.

The good news is that you have the perfect engine to learn on. It's going to be tough to blow it up, and it's a simple setup so you can spend your time learning the fundamentals and getting good at reading logs, etc.

 

Im no expert, I did tune my turbo b16 myself and it hasnt blown up in 4 years (knock on wood). If you have no form of knock detection, I would be safe and use an oem ignition map, tweak your AFR's and be done. Sure your leaving power on the table but your also not blowing youe sh** up either. Mine is boosted so its different than yours, but I utilized oem ignition maps in vacuum, than retarded .7 degrees per psi. Yes I know im leaving a lot of power out there, and this is a relatively conservative, archaic approach considering the technology out there, but with out a dyno or real knock detection, I chose safety over peak power. I do not trust most tuners local to me, ide rather do it myself. Keep up the DIY, glad to see someone trying to learn and have fun.