I would like your opinion on something. I recently replaced the stock fuel line with -8/-6 supply/return line with a Hobbs switch kicking in the 2nd pump on a Full Blown double pumper setup at 15psi. I re-adjusted my FPR for 43psi atmospheric, reconnected the vac line to the FPR and went to do some logging with Evoscan and my UEGO wideband to make sure everything was cool. I am rocking the:

FP Black, 27psi max (for right now )
2.3L Kit from MAP
FIC 1450 inj
FB double Pumper
FuelLab FPR
E85 Tuned by MAP

Now it seems to me that I am running a bit lean across the board and shut her down a tad early in RPMs because I didnt want to detonate or knock at all which i didnt see I did from the log attached (no KnockSum).

Please take a look and let me know what you think.

Thanks!

 

You are definitely running lean, even for e85. You will likely not see knock with e85 unless you are running too rich. Interested to see what your injector duty cycles are, which might give a better indication as to why you are running lean.

 

I know.. I was wondering that myself. Im not sure why Evoscan didnt log it. I had it checked... hmmm

 

You can plug your ipw's into a online calculator along with various rpm's to get your idc's.

 

Ok.. I updated my .txt file that has the IDCs on it which where calculated with the addition of "dead time" of 1.17ms on my FIC 1450cc @ 13v. IDCs shouldn't be above 64-65%. Thanks SoCalRed! That was a good call to find out the IDCs from the IPW and RPMs.

 

How bad is it if it is not knocking but runing this lean? What is the ideal AFR for E85? Ive been reading that 12.8-13 for spoolin with 11.8-12 on the rest. Is that a safe assumption?

 

You are correct in the WOT being 11.8-12. I would run things a little bit more rich with your spooling AFR's. You won't knock on E-85 in most cases, that is why you really have to be careful when tuning it, especially with regards to timing.

 

I would be more concerned on the high 12s afr around 4.4K rpms, you need to have it tuned to high 11s to low 12s especially on higher boost/rpms.. spool would be better if you go rich, 13s is kinda lean for spooling