I've been toying with a buddies 93 Z that he has a 396 in. The original chip he had was from Ed Wright and the car ran pretty good. But we know that there is quite a bit more in it.
Recently I've been playing with the ve tables and trying to get the blm's around 124-128. So far it's worked pretty well, but there has to be an easier way to do this than exporting datamaster logs into a spreadsheet and grouping the blm's from similiar map and rpm.
VE Master would be very nice and Joe Georger is toying with it...but right now that's not possible.
Should I lock the blm's at 128 and use the short term ones to tune? Should I just keep using datamaster logs and exporting them into spreadsheet form and doing it the hard way?
How have you other guys with 93's done it?

 

Dan,

I may be missing the obvious but why force the block learns to a small range? The beauty of closed loop is that the engine will respond to the sensors and keep the AFR in a narrow range by varying the Block Learns and integrators. Now at WOT you lose the feedback and I can see working real hard on that, but that is basically just getting on a dyno and varying the PE tables for fuel and the timing tables for spark, I believe.

BTW, I did V1 through V3 of my 93 40ths 383 today. It was running pig rich and I noticed that the PE enrichment vs coolant table runs way richer for a Vette than for the FBod. So I pulled out some enrichment there and pulled down the PE enrichment v/rpm table pretty good (based on a recent dyno run or 3). That seemed to work nicely with my O2 sensors still at 900 or better so there is some more room to find with a wide band and dyno. I also used datamaster runs to track knock and ended up (V3) pulling out a couple of degrees of timing at kPa values 90, 95 and 100 at most all rpm over 3400 rpm (from the values in my Formato chip).

Seems to run nicely. I also cleaned up the idle and startup enrichment, cause it was so rich at startup that my eyes burned in the garage. Much cleaner cold startup and idle warmup now!

Perry

 

Perry,
The blm's are stuck at 108 most of the time so I'd like to lean out the VE tables a little and see what happens.
So far leaning out the ve tables 5-10% at different map and rpm has worked pretty well and the blm's are starting to get under control. I'd just like to see them not stuck at 108. I was hoping for the low 120's or so. Besides, the 93's rely heavily on the VE tables since they don't have a MAF sensor, correct?
Anyways....just messing around and trying to make part throttle better is all.
The WOT stuff is ok too. Adding some timing over the Ed Wright file I sent you and the O2's are between 870-900 and I didn't really mess with them. Figured that was ok until we get it on a dyno with a wideband.