Ever since I put these new heads on and fired up the car, with no other changes, it ran rich at idle, lean at full boost 14+PSI.

Well, today I took the car to meet my daughter at Panera Bread for lunch. I passed a car under 'some' boost (Not sure how much) and as I rounded in front of the passed car, I heard a distinctive 'Pop!' and the car started running poorly. I thought maybe it had popped off a coupler. I took a quick look at the Wide band and it said "19", "20" and "LEN" (for dead lean). I pulled over and took a look under the hood. Aha..the up pipe had popped off it's coupler just prior to the Blow off valve. I looked at it for a minute, musing over the fact that it had never came off that Bead rolled pipe before... Then I thought... "Hey...it's running like a non-turbo mode now. Like normally aspirated...why is it running so lean? Is the turbo *that* much of a restriction at ilde and Bryans tune compensates for that? Or is my intercooler stopped up?"

So.. my question for you guys is,... When/if you pull off your up-pipe, does it run lean?

 

I purchased a used MAF Translator and hooked it up a little bit ago with the intentions of offseting the lean idle and cruise settings. But here's the 'lay of the land'...
Without the MAF Translator in use...

• Start the car (starts right up w/o hesitation) and turn on the wide band AFR gauge
• AFR starts at 14.7 and hovers there for a few seconds, the starts going to 14.6, 14.5, 14.3, etc till it's in the 13.9 range.

I introduce the MAF Translator into the circuit with it set to 'Base' of 5% lean.

• Start the car (starts right up with a 'little' hesitation) and turn on the wide band AFR gauge
• AFR starts at 14.7 and hovers there for a few seconds, then goes to 15.3
• I'm thinking "Nice!".... but then...
• The AFR goes to 15.2, 15.1, 15.0, etc until it goes to 12.9...WTH?

I turn the MAF translator to %10 lean and restart the car...

• Start the car (barely starts since I have to pedal it) and turn on the wide band AFR gauge
• AFR starts at 14.7 and hovers there for a few seconds, then goes to 15.9
• I'm thinking "Nice!" again.... but then...
• The AFR goes to 15.8, 15.7, 15.6, etc until it goes to 12.9 again. Damn!

I'm going to remove the MAF Translator and restart it and see if it's still only drifting down to 13.9.

 

Well, all is well with the MAFT in place now. The above behavior was only because it was warming up from a cold motor. After it's to temp, it's behaving fine.

I drove it with the 10% lean for a couple of days but it was running at like 19.x and just 'LEN' (completely lean) at idle once it was fully warmed up. I put it at 5% lean and it's perfect at idle (17.x) and cruise (14.9/15.3). I still have an lean issue at WOT at full boost(15.6 psi the other day) and the MAF Translator can't compensate for that. I'll have to do that in the tune. I'm due to get my AKM USB cable back in a day or so and I'm going to set the MAF table 5% lean across the idle/cruise definitions and add fuel to the WOT PE tables to see if I can get on top of the Lean out at WOT issue.