Yup, couple times but still have not been able to make mine work, I get readings on all three channels without anything hooked up and more on all three channels when hooked up, but more on one of three. Awaiting next response and have the autoprom hooked up to test bench.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
I got all this figured out and did a writeup on it. Here's the ADX file for $42 with all three channels for AutoProm added. Channel 1 has volts and AFR set up, Channel 2 and 3 are just 0 to 5 volts.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
nice... i will give it a try
Reviving an old thread, here. I've also got a wideband that I'd like to hook up to my Autoprom. Except I'm 7730 $A1 for v6 with an AEM. If this would be better off in its own thread I can repost or a mod can move it.
If I'm digesting this right, it sounds like I need the packet set for 63, 65 or 67 in my ADX.
And my wideband says the 0-5v output is v * 2.375 + 7.3125 offset. I originally thought that meant X * 2.375 + 7.3125, but if the Autoprom shows 0-1024 instead of 0-5v, that should mean X * .02319 + 7.3125, right?
80 Camaro Z28 - 550hp AFR 383 / T56 6spd (Holley HP EFI)
91 Beretta "SS" - 260hp 3400 MPFI / HM282 5spd (7730/$A1) sold! for crazy money...but I miss it
94 Silverado Z71 - 300hp Vortec 357 TBI / NV4500 5spd (7427/$0D) gone but not forgotten
96 Beretta "T56" - 4.8 LS RWD swap / 6spd (0411/2156)
01 Silverado 2500HD - stock Vortec 8.1 / ZF6 6spd (0411/8322)
https://www.youtube.com/c/GEARHEADdezign
To get a reading of the voltage the formula is x*[5/1023]. But for a AFR formula I need to know the AFR range of the tool.
It looks like the ADC channel is 10 bit wide. That`s why it reads 0-3ff in hex or 0-1024.
The scalar in adx should be 16bit also or you will get scrambled data.
Ok I found this how-to thread that is hugely helpful: http://www.gearhead-efi.com/Fuel-Inj...=autoprom+data
My wideband's 0-5v makes things kinda difficult though. It is only accurate from 0.5-4.5v.
http://aemelectronics.com/files/inst...line%20AFR.pdf
So of the 1024, 0-102 and 921-1024 should be ignored when figuring the 9.5 AFR difference (8.5-18 sweep), 9.5 / 819 = .01159951. So I finally got it!
I checked the table on the AEM PDF and at 2.5v the AFR is 13.25.
1024/2 = 512
512 * .011599 = 5.9386
5.9386 + 7.3125 = 13.2511
Checked it vs the chart at 1.25v and it also came out right.
So for an AEM 30-5130 Analog Wideband the equation is (X * .0115991) + 7.3125.
Hopefully this can help someone in the future. Cause it definitely tripped me up.
Last edited by woody80z28; 03-11-2018 at 10:43 PM.
80 Camaro Z28 - 550hp AFR 383 / T56 6spd (Holley HP EFI)
91 Beretta "SS" - 260hp 3400 MPFI / HM282 5spd (7730/$A1) sold! for crazy money...but I miss it
94 Silverado Z71 - 300hp Vortec 357 TBI / NV4500 5spd (7427/$0D) gone but not forgotten
96 Beretta "T56" - 4.8 LS RWD swap / 6spd (0411/2156)
01 Silverado 2500HD - stock Vortec 8.1 / ZF6 6spd (0411/8322)
https://www.youtube.com/c/GEARHEADdezign
7747 ECM Question: 1990 GMC Jimmy 4X4 383 CID Stroker with mid-range hyd Roller Cam .485 lift, Edelbrock 50 state legal heads, 50-state legal Edelbrock 8502 Intake and Multi-port (gang fired) FI conversion w/29 GPH injectors. (CA Vehicle) (sorry). 700R4 trans, 32 in tires, 3.08 gears soon to be changed to 3.73. Using Tuner Pro software to flash a modified, programmable , 7747 ecm . Any good tunes for this out there? also would like to add WBO2 to control fuel trim to keep the catalyst working correctly. (yeah I know, cat wtf?) I have to keep it installed. maybe a test pipe between smogs? Oh yeah, 10.2:1 compression.
Last edited by JimmyRon; 03-30-2018 at 09:05 PM.
I have several good 16197427 .bin files (with WBO2) for an engine like yours. Ever think about upgrading to a 16197427 computer? It's an awesome upgrade, with a baud rate 50 times faster than the '7747! Imagine a TBI computer with the Processor Power as good as an early LT1 computer!
Link to write up: http://www.gearhead-efi.com/Fuel-Inj...out-Directions!
WBO2 Link (16197427): http://www.gearhead-efi.com/Fuel-Inj...g)-Spreadsheet
dave w
I'll consider anything to maximize performance and efficiency. Thanks for the input, any links you can provide would be greatly appreciated.
Dave, I should have added that I have a Dynamic EFI 7747, with the flash & multi port mod. I haven't installed the engine or the ecm yet. I plan on doing this within the next couple of months.
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