Hi i have a fc3s with a cosmo semi Pp engine & garrett GT4788 and 10 160lb injectors, i'm going in a couple of days to the dyno and i need some information about the methanol AFR for my turbo application and the EGT temperature in the downpipe aprox? i think 6.4afr is for aspirated application.

i set my leading timing on 20deg for all RPM and my tgap on 10 deg for all rpm and cero on the Tmap.

right now my idle is 2500rpm with 4.78 of AFR? this is too lean or rich?
i want to run my car aprox 36psi does anyone can help with the AFR? Please!!!

 

At full boost run below 3.9 is a safety zone ..after tunning lean little to 4.1 ,,,

 

dont worry about the afr on idle. thats the least of your worrries
and 20 degrees @ 36 psi ?? good luck

 

he should have no prob running 20deg on methanol. we run 17deg at 54psi.

 

Hi and thanks for answer me, i dont worry about idle afr, i just want to know what is the best afr for methanol fuel at full boost, if you can help me because iam new and i'm trying to program my rx7?
my first time in the dyno we made 450hp at 18psi with 4.6AFR i dont know if this is good? i just want to make 800hp at 36 or 38 psi
i have my static tim=0, Trpm=20deg all RPM, Tgap=10deg all RPM, Tmap=0 in all boost pressure.
Just a little help!

 

we dont really worry about afr with meth. we primarily use egt only to tune our race cars. curious to see your setup, do you have any pics of it?

 

we like to shoot for 1150*F after turbo

 

heres a pic of our race car, running pure meth on a mechanical fuel injection system.

 

For simplicity's sake, what lambda are you seeing? It gets confusing when you talk about AFR and you are dealing with different fuels.

 

^thats why we use mainly egt. plus afr usually react way to slow to us with meth. we had a problem fouling out sensor too quick also.