Isnt 14.7:1 supposed to be the most efficient AFR? I was wondering though, if all this would change with alltitude, and temperature and stuff.

 

Guys, can someone clrify this please. Is it 12.5, 13 or 14.7? Oh BTW, this is still SPDST3R

Anyway, I tried to richen things up to 13:1 and it seemed to loose some power. So last night I reset my SAFC to 0% and gained some power back. Should I try for 14:1 at this time? I'm just afraid that I'll blew up my engine. Help again please. Thanks.

 

Each car will be different. But re-read my post about leaning it out. Remember what I said about riching it up? Try leaning it out and you find it will do wonders.

FYI, to get a n/a engine to ping hard enough to blow up, is very, difficult. I've had detination running nitrous on carbon apex seals before. Never popped. And this happend like 5 different times. Now turbo motors, are a complete different story.

CJ

 

Ok, great. I'll try to lean it out tonight and see if it'll make a difference. Thanks.

 

13.5-14.0:1 is fine for an n/a motor.

the reason you are so lean at the beginning of your run is because the ECU is probably in crusing mode. It looks like you are in 3rd gear for the run.

I would do a 4th gear run, because it is a 1:1 ratio, and it will probably be more accurate. take it all the way up to redline, it looks like you let off @ 6700 rpm or so. With a full exhaust, most of your power will be in the upper RPM range, even past redline.

Jameson