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Pretty easy to do via BLM, WB would help on PE for accuracy.
Is this your 1991 Suburban? If it's a towing torque monster you'll be fine. These PCM Injector Duty Cycle to go static 100% around 3500 RPM. Even stock engines in trucks seem to run out of VE at stock pressure.
Mark,Quote:
Originally Posted by EagleMark
This seems to be true as you have seen my datologs showing that.
However, I believe in PE mode, fuel is still added. you can see the 02 sensor peg at .900mv even when the injector supposedly goes static. Why/How is this done? Async flag still is off?
thoughts?
edit: I guess i'm not static after all. Remember when you did the idc calculation fix? I'm only hitting 81%IDC and 7.0BPW
Yes, this is my 91 Burb. 266HR Roller cam and 9.5ish compression with dome pistons and cleaned up peanut port heads. Doing the math, I figured I could go to 18PSI and have enough headroom for WOT, but my main goal for this weekend is to clean up the low RPM VE table so it's not fouling plugs rich while idling and driving normally. Then I can go from there. It has a fresh pump in it. Noisy as hell, but seems to be strong. :)Quote:
Originally Posted by EagleMark
When it enters PE the calculation for BPW changes to new AFR, so more fuel. But available on time is still the same, as RPM increases available time get's shorter. 7.1 BPW is about 85% IDC at 3600 RPM, but the same 7.1 BPW at 4600 RPM is 108% IDC
Vane drive pumps are better but noisier... not bad in tank, but man do they whine external...Quote:
Originally Posted by 1BadAction
My mind is now blown. I spent a year trying to burn a new chip for my '92 k2500 and couldn't figure out what I was doing wrong. Perfect timing, too, since I just rebuilt the motor. Any advice for me, I'm still a tuning virgin technically lol. I'm a bit of a nerd tho so I should catch on fast once I get burn to actually work. 357-flat top pistons, ported stock truck heads, 2.02/1.60 valves, summit 1103 cam(288/298 duration, .444/.466 lift) roller rockers, torker2 carb intake, 454 tbi (I got 65# and 80# injectors) and short tube headers (for now). 4l80e stock trans, 4.10 geared 14bolt.
I think using a Moates.net Ostrich 2 would be an option to consider? https://www.moates.net/ostrich-20-th...eed-p-169.htmlQuote:
Originally Posted by Hillbilly
No need for chip burning equipment. Just upload the binary (.bin) file from TunerPro RT. The Ostrich 2 can be "flashed" while driving!
dave w
Is eaglemark or sixshooter still around or did I miss them by 4 years ?
....
Eaglemark isn't with us anymore, sixshooter is rolling around here somewhere I think, but it seems since Mark left us it's gotten real quiet :sad:Quote:
Originally Posted by dktool
Sadly it has. In addition to Mark's passing, my job now requires many hours and my family seems to get much of the rest of my free time. I miss the fun of playing with cars and EFI. :(Quote:
it seems since Mark left us it's gotten real quiet
But I do appreciate the all help from the folks who watch the board daily. :rockon:
I'm in a similar time crunch as 1project2many. I keep an eye (keyboard) on the site as best I can.
dave w
X3, I'd love to spend more time finishing my current projects(and helping out others where I can) let alone starting new ones, but it's really difficult as it is with our work schedules now.
Maybe it is useful to somebody:rockon:
AWBP $85 5,7TBI 4L80 1991 V2500 Suburban
AWTU $D8 5,7TBI 4l80 (stock chip w/o EGR and О2-sensor)