It been a while since Ive been on the forum. But the old miata is giving lean problems.
I threw away the afpr, kept the bipes timing unit and got a TDR fuel tunner 3 (fuel management simular to Voodoo Box)

Running a non-intercooled M45 supercharged 1996 miata.

My afrs are 13.1 @ 7 psi @ 7000 RPMs. With 1.8L injectors.

I cannot get the AFRs to go richer. Guess the fuel pump must be weak.
What afr do u recommend for 7 psi.

 

I only understood about 60% of this post.

I'll throw in a vote for 12.5-13 seems ok, err on richer for non-intercooled.

 

welcome back, old timer
I recommend you embrace technology post 1989

 

Thanks, its good to hear from you 18 psi and everyone.
I thought 13's were fine, but couldnt remember.
i guess Ill change the fuel pump and shoot for 12.5 afr.

This little M45 gives a nice boost.... But its not extreme like a Garrett turbo.
The little controller should work fine for going back and forth to work and passing traffic. Lol

 

12.0 at least

 

what was the point of this exercise?

 

I run 12.5 at that boost level but I have a big turbo and intercooler for low intake temps. You should probably run a bunch richer, maybe 12 or 11.5 to be safe. But really you need an intercooler.

Also why are you running fuel/timing bandaids from 15-20 years ago?

 

Thanks, now you owe half a beer. That's what just came out of my nose.