Ok, so I'm out doing some datalogs...

When I nail it, I've got my TPS AE increased pretty good, so it immediately drops to 11.50 a/f, but then over .109 seconds, the a/f SPIKES to 16.70, then drops to 10.2 a/f, over 2.7 seconds.

This was on a 4th gear to 3rd gear drop... so I let my foot off the gas, pushed it into 3rd, and dropped the clutch whilst flooring it.

With it at 1470rpm, running it until 5000rpm in 3rd gear, this is what I find -

I'm cruising between 14.8-15.2:1 a/f, I punch it, and my AFR immediately spikes to 17.1, then over .328 seconds, bottomed to 9.9:1 afr...

Foot still in the floor, over the next .798 seconds, the AFR climbes back up to 13:1, makes its way down to 12.5-12.6:1, and at 2700 rpm (about the time boost starts to kick in) my AFR drops to 10.5:1 and climbs slowly to 11.0-11.3:1 (under boost still) Right around 4600rpm, my AFR starts to slowly climb to 11.7:1....

I'm thinking I may have too big of a TPS shot, and not enough LV8 AE in there...

Another odd thing, is that I always seem to have a leaner spot (from ~11.6:1 climbs to 12.6:1, and then back down) between 4700 and 5000 rpm. WTF. It is ANNOYING! I've increased my "%change Fuel to Air Ratio @ WOT vs RPM" but it is still there...

Something else I've noticed, is that I always seem to be a little leaner on the next gear up (comparing 2nd vs 3rd, or 3rd vs 4th) by approx .5 AFR than the previous gear...

Obviously, I've still got some AE tuning to do in there... I'll host my ZT-2 datalogs in a few minutes, but I thought I'd see what some of you guys think

She's running pretty hard @ 7psi, btw

*EDIT*

Right click, save as - Zeitronix datalog -

http://members.***.net/doward/wot090405.zto

 

still playing with the 302 ??? $3a code ? if so then you mght wanna do a scope sweep on your TPS and make sure you dont have a flatspot. sure as **** sounds like it. also remeber that MAF is pretty slow to respond. thats why the TPS table has order over the delta AE table.

 

Of course

Haven't seen a problem with the MAF being slow to respond... I mean, in TunerPro, any change in airflow is immediate, for the most part

 

trust me that maf is a turtle. is pretty slow. hmm there should be a decay rate and a AE delta constant. email me a copy of the bin ill look it over.

youve got me email,.

 

Yep, I've already re-worked the delta LV8 vs AE constant, as well as the decay rate.

As far as the MAF responding slowly, the only instance that has been a problem, is mashing the throttle from a stop. That's to be expected though - I mean, with my current setup (MAF upstream of the turbo - ala stock GN) simply fluid dynamics is going to clearly show that there is no way the MAF can get a good change in signal, until well after the gas has been mashed.

Once the signal is there, the MAF responds fine - I have zero problems with it. I understand the MAF is not going to get a change in signal quickly, due to the fact the 'pressure wave' for lack of a better term, has to travel down the intake tubing, through the intercooler, through the turbo, before ever reaching the MAF.

I can not blame the MAF - only the placement I have put it, due to the fact I can no blow through the MAF. I'm just working around it, via the TPS AE, and length of time I use it (similar to a carb's pump shot)

I think that slightly lean spike over the 4700-5000 rpm range is what I'm really wondering about... has anyone else ever experienced that?