[Dimman]

Originally Posted by WingsofWar

i tune by EGTs on my rx7

AFRs are unreliable when it comes to a rotary, or any super high performance endurance engine for that matter.

Some veteran tuners told me once..reason why lean mixtures burn hotter is amount of oxygen present in the gasses after powerstroke. The more oxygen the more superheated the gasses get, and raises internal pressure..which damages seals, bearing, internals. Correct me if im wrong, but knowing that saved me from blowing up my current setup and running good power for a long time.

A stoich mixtures in my rotary shoots my EGT warning lights up the roof, and while i probably gain some power with a leaner mix..im also damaging my engine. Iv already blown 2 engines already tuning with AFRs only. Last time i check my AFR conversion tables I was at a happy average of high 10 AFR.

Tuning with EGT + AIT is the best tuning option because you can convert to EGT temps to AFRs and monitor before,during,and after...engine dynamic performance.

It's a rotary. Just driving it damages the engine.






heh...