I have about 11k miles on my REW motor (single...so maybe not REW anymore).

I have never been able to lean the idle anywhere near 14.7...its really happy around 11.9-12.5, unless there is heavy eletrical load then it can be happy around 13.5 which I'd love to have all the time.

Using a Haltech to tune (idle is 3* advance on 71 trigger angle), and under driving everything; crank, wp, alt, and ps (thought I'd mention since its happy a little leaner under electrical load)

motor has no problem cruising 14.7 - 15.5

I haven't checked compression, but it pulls as much in-hg since I broke it in (13-14 @950rpms). Street ported Intake/exhaust ports. Could the motor just be weak?

Any tips would be great...I'll try anything. Already adjusted trigger angle down to 65, and advance up to 10*...nothing seems to give a rock solid lean idle.

 

its not gonna idle anywhere near 14:1, they just dont. stock is around 10.8-11.2...

 

haha, thanks for trying though

my last motor (street ported intake only) held idle at 14.7; no problem. Stock ECU with PFS piggyback.

 

That's just the nature of things. If Mazda could have made rotaries run stoich at idle, they wouldn't have needed to install air pumps.

You *might* be able to try screwing around with timing to radical degrees, but then you would be compromising other facets of the tuning. Maybe if you had timing waaay retarded at idle, you could have the engine under enough load that it would idle smoothly at stoich... I've never bothered to experiment so I can't say for sure.

It's still a REW, as far as the block is concerned. FD engines are much different from other 13B's.