PSmalls::AnalRetentiveNumbNut

Big thanks to RokSpedS4 for showing me where there is race gas at the pump ($5.69/gallon). He went along with me for the ride this afternoon and I pumped in just under 5 gallons to an otherwise empty tank.

I made absolutely no changes from my pump gas Lemmi settings, but I did pull the ECU for 15 minutes tonight in hopes of speeding up the adaption process.

I pulled 2 FATS runs in either direction, but ECUx cut out most of the data on my 3rd run as you'll see.

Boost: ~24.5 PSI spike tapering to ~22 PSI
Temperature: ~45F
Weight: ~3650 lbs

MAF...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FMAF.gif">

Timing (X still pulling back on race gas w/o CF!)...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FTiming.gif">

IAT...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FIAT.gif">

Knock Voltages...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FKV.gif">

Correction Factors (definitely reset after 15 min ECU disconnect)...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FCF.gif">

Desired AFR...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FDesired.gif">

02 voltages...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445F02.gif">

EGTs...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FEGT.gif">

Fuel Injector On Time...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FFIOT.gif">

Fuel Injector Duty Cycle...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FFIDC.gif">

FATS...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FFATS.gif">

<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FTime.gif">

FATS +...
<img src="http://img.photobucket.com/albums/v654/DocSlow/HomebrewStage310-21-0610445FPlus.gif">

Nye's HP estimates and FATS calculations...
<img src="http://nyet.org/fats/uploads/Typical-10-21-2006_12-16-45_AM%2045F%20JD.png">

It seems like I'm far from the only one seeing timing pull back without correction when running race gas on X chip. I'd like to "upgrade" to the tweaker file that has X and XR so I can switch when changing octanes, probably would get more consistent timing this way and would eliminate the need to unplug the ECU for a "full" reset. Furthermore, I hate seeing that desired AFR curve that leans as RPMs rise...really hoping that a file change could eliminate that entirely so I can see flatter AFRs as other homebrew guys here do. Heh, now I'm just being a picky bastard. =D

spt@lubzu

does that a/f seem too rich?or am i reading wrong?whats stoich for our cars,11.5?

PSmalls::AnalRetentiveNumbNut

Stoich is stoich no matter what the car, 14.7:1

spt@lubzu

tnx,nice fats.does the phen.spacers cause a need for spacers to the fuel injectors or rails.

PSmalls::AnalRetentiveNumbNut

Thanks. No, not AFAIK...

jettatoS4 (Chad)

God I wish what all that meant

noSup4u

was wondering where that user name change came from.

Mike2kS4

Everything I've come to expect, but faster

PSmalls::AnalRetentiveNumbNut

cylinder 5 has 2 misfires and cylinder 2 has 1 misfire...that's it.

Warm idle is the same, only cylinder 6 is misfiring a bit.

It's probably about time to change plugs, they have 30K miles on them.

Car is just amazing, so damn good to me, drives really stock-like, couldn't ask for more except for ditching the cyl 6 hatred. ;-)

Mike2kS4

Cyl 6 is a weird one. I hope the new plugs sort it, but I'm not that confident.

A flatter AFR prolly won't make you any faster since, at your boost level, the turbos are running out of compressor about as quickly as the fuel is tapering. It would be nice to see though.