AFR x Load Clarification- updated
Mar 27, 2012, 09:41 PM
#1
AFR x Load Clarification- updated
So During spool up the afr should be around 12.5ish and 11.5ish peak boost tapering to 10ish by redline do rpms affect this as well? for instance in a formula NMAFR = DAFR X MAFR / AAFR what if its at 14.2 aafr at 270 load 3400 rpm should the desired afr be at 12.5ish since thats still spool up rpm range or should it be diffferent?? This would help me with my learning path to evo tuning 
NMAFR = ? X 11.1 / 14.2 ...What should my desired afr be at these levels to get my NMAFR?
NMAFR = ? X 11.1 / 14.2 ...What should my desired afr be at these levels to get my NMAFR?
Last edited by DormantBeast; Mar 28, 2012 at 12:31 AM.
Mar 28, 2012, 12:59 AM
#2
At 270 load you want to be a lot richer than 14.2. even richer than 12.5. I would start at 11.5 at 270 even though you're only at 3400rpm. How thats even possible beats me.
Forget that formula and tune for what your car likes. Some like it lean with more timing. Some like less timing and richer mixtures, like mine. Tune for what your car wants.
12.5 afr at spool up is for like 4-5 psi from there you want to get progressively richer. Also you might want to start out with richer mixtures and slowly lean it out. Instead of starting lean and adding fuel.
Forget that formula and tune for what your car likes. Some like it lean with more timing. Some like less timing and richer mixtures, like mine. Tune for what your car wants.
12.5 afr at spool up is for like 4-5 psi from there you want to get progressively richer. Also you might want to start out with richer mixtures and slowly lean it out. Instead of starting lean and adding fuel.
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