What changes should I make to the prom to help it run. I have not got it yet, but I'm trying to fix problems before they start. Thanks in advance.

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Mods: ZZ4 engine w/stock TPI, adj, fuel pres. reg., MSD 8.5, HI6S ign. w/ PS-91 coil, K&N filter, TPI air foil, Hooker comp. shorties, American Thunder flows. 160* stat., TB bypass, 3"cowl, bat. relocate, AC delete, stock T-5 w/ 3.42 rear, ported plenum, 24# inj.

 

Your fuel requirements are going to change dramatically above 5000 rpm. I have also found that the MiniRam responds to ignition timing. I have a 383 with 11.5-1 compression and found that the car runs best with 38 degs total timing. This was not a seat of the pants, it was done at the dragstrip.
www.geocities.com/dzperf

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D&Z Performance
"Putting Power to the Pavement"

[This message has been edited by HiTech5 (edited September 29, 2001).]

 

It really depends on your modifications and the type of ECM you have. I have a friend that has a Miniram. When his engine was a 350 and not too radical, the ARAP bin for his 89 worked very well with only minor tweaking. But now that he has gone 383 and made extensive mods, the ARAP bin is not working out that well.

Further, he is maxing the MAF around 5,000 rpm, so he will have to go to SD as there is not enough ability to adjust the eprom via PE beyond 4,800 rpm with MAF. With SD, you can continue to adjust the fuel via the VE Tables to 5,600 rpm and the PE tables to 6,400 rpm. Since his enigne will make good power past 6,000 rpm, SD is his only alternative at this time.

 

Where can I find the software/hardware to do this. I have a SD car. Which is the easiest to use? I am NOT comp. literate. Please let me know about how much it costs. Thank you.

 

Glenn, I guess you didn't see my previous response to this. The PE vs. RPM table in the $6E code also goes to 6400 rpm, at least it does in GMEPro. I'm sure it should in TunerCat too. No need to change to SD.

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Greg Westphal
'87 IROC 355TPI/A4

 

Greg, I just checked the newer version of TC and on the 89 (WOT %Fuel Add vs RPM) it does appear to go to 6,400 rpm. I am suspecting I may have been looking at the wrong table or something was funny with the older version of TC which I was using at the time.

 

Freebird, head over to the DIY PROM board and start by reading the article by Trax, its on the top of the initial page. After reading the article a few times, then start by searching through the archives for things you have questions on. Chances are they are already answered.

Brendan

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1987 IROC-Z L98,SR,EB 6085's,LPE 219/219 Cam, Crane 1.6RR, EB TPI Base, 58mm TB, Stock T5, 30lb SVO, AFPR, K&N, EB TES, Catco Cat, 3" Borla Cat-Back, Accel cap,rotor,distro/other crap, Aluminum DS, 94 Disk Rear, Adjustable Prop Valve, Precision 3.73 Gears, Weld in Sub-Frame Connectors, Hotchkis LCA's, KYB Shocks/Struts, Poly Bushings all over the place, Moog Upper/Lower Ball joints and Tie Rods ends/Idler Arm, Big stereo, 730SD Conversion.

To see the ROC, Check out the webpage Here