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AFR and Timing Tuning (02 Regal GS 223k!!!)

PWNED said:
How are the initial #'s found though? Going from stock to bigger injectors to start off where you need to be.

I can't seem to find the post now but I thought I came across you saying 21% would need to be modified for a 42 and 19% for a 39#.

I didn't understand.
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Stock injectors are 33.7# and yours are 41.5#... Math says how much bigger the bigger ones are.
 




Gains for MPG is 100% done in the timing table on these cars. And your right foot.

Most will increase the timing during "cruise" parts of the table to help get an extra 1-2 mpgs on the freeway.

I took a 2004 GTP file and ninja rigged it with my 00 GTP file. The 04+ cars got a more aggressive timing map than the older years, pretty much just have to combine them and make it nice.
 
Wrong. Tons of real mpg is gained by disabling cat warmup... close guess with the overtemp its usually a good idea to set those numbers to 11.00 because you should never hit those and if you did it would effect wot too.
 
darkhorizon said:
Wrong. Tons of real mpg is gained by disabling cat warmup... close guess with the overtemp its usually a good idea to set those numbers to 11.00 because you should never hit those and if you did it would effect wot too.
Click to expand...

Is that the correct temp?

Would putting all of that at 11.0 make it run rich in general? How does making it all 11.0 instantly net better mpg's?
 
Look at what the table is for, its only for "cat overtemp protection".

Thus the only time it will ever go to a commanded AFR of 11 (if set to it) is when the coolant temp is above 240º.
 


There's probably some other "hidden" feature that only darkhorizon knows about ffdp. But in all seriousness max out that temp for cot. Set Afr to what your p.e is set at and leave alone. I would completely agree with ffdp. Timing in cruise areas is very important and can net you 1-2 mpg more.
 
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