For those of you with RRMs Piggy Version 2 could you please post your AFRs at WOT and what octane gas you are using. Just tryin to see what everyone else is hitting using rrms piggy.

At WOT i usually get around 12.0-12.3 AFR. This is in second gear from 2k rpm to redline using 89 octane.

Thanks everyone

 

interesting isn't optimal 13ish on 89-91?

 

If I remember exactly, optimal AFR for 87-89 is arround 12.5-12.8

for 91 and + is 13.0.... RPW tune around 13.5 for 91

I saw that in old few post.

 

yah, roughly 12.8-13.0 is what I consider optimum. Tune that extra 1 AFR and feel a nice difference.

 

you guys have to consider what gear you're in. a 2nd gear pull is gonna be richer than a 4th gear pull, which is what gear you want to tune in.

 

Update... i rerouted the vacum lines on the intake mani(removed that brass bracket), opened the screw on the MAF about 3 turns and increased the fuel pressure to 40 psi and now at WOT my AFR is ~13.5ish. I also reset my battery and currently have no CEL on. And all i can say is it is a nice difference from when the AFR was ~12.0. Is the leaner AFR due to the ecu still learning and will it richen up as it learns? or should it stay where its at now for the most part? Thanks!

 

you mean the biss screw?

 

uh... the screw on the bottom of the MAF... oh and my cel came on and afr is now 12 again =( hopefully i'll be getting my hands on a 501 maf soon so i'll see how that goes