GhostStar Posted February 28, 2008 Report Share Posted February 28, 2008 i want to be able to run the pri/sec injectors rather than both firing back and forth. if i switched to an 89 ecu and 89 injectors would this be all that i would have to do? Let me know, and is it worth it. Link to comment Share on other sites More sharing options...
Shelby Posted February 28, 2008 Report Share Posted February 28, 2008 if your doing it expecting a lot more power for get it, esp if you can't do the work your self,,theres pages of material on swaping the harness's and ecu's take some time and do a little reading know a bit more about what your gona have to be doing Link to comment Share on other sites More sharing options...
Boosted77. Posted March 14, 2008 Report Share Posted March 14, 2008 The swap directions are located in FAQ's. You have to either swap the harness or mod it. Also you have to change the igniter box, computer, TPS, and MAS air (which is a perfect time to get a 1G-MAS). This alone will help, but add to it a DSM translator and GM MAS and you'll be smiling ear to ear. I myself am about to do this very thing. I have everything except the injectors. I just cannot get a 1G-MAS to work on my '86. I've tried and tried but with no luck. If I could get a 1G-MAS to work, I wouldn't do the whole swap, but... Link to comment Share on other sites More sharing options...
BOHO Posted March 14, 2008 Report Share Posted March 14, 2008 if your doing it expecting a lot more power for get it, esp if you can't do the work your self,,theres pages of material on swaping the harness's and ecu's take some time and do a little reading know a bit more about what your gona have to be doing you don't have to change the TPS or the ignitor...ECU ISC MAS and injectors...Good luck... Link to comment Share on other sites More sharing options...
JAinsworth Posted March 14, 2008 Report Share Posted March 14, 2008 you don't have to change the TPS or the ignitor...ECU ISC MAS and injectors...Good luck... To put it another way, go standalone if you own an 86 and want more than stock performance with the easiest conversion that is also fully tune-able. Jimmy Link to comment Share on other sites More sharing options...
Chad Posted March 14, 2008 Report Share Posted March 14, 2008 To put it another way, go standalone if you own an 86 and want more than stock performance with the easiest conversion that is also fully tune-able. Jimmy I converted my 86 to an 88 by modifying my 86 harness and a 1-g MAS. I skipped the ISC portion and set my idle with the throttle stop screw. It wasnt' perfect and cold start/running was an issue. It ran very well, up to 19 PSI on a T-4, but the idle/cold starts prompted me to go MPI. That was 6+ years ago and I've not looked back I never got more than 13 PSI with that T-4 on the 86 ECU, even with the FCD and hacking on the MAS etc. The 86 ECU just won't make much power. If I were to do it agan, I'd do MPI if I wnated lots of power or planned future mods. I'd do a full harness/sensor swap if I planned a tame street setup with mild mods (for which an 88 ECU is fine). Link to comment Share on other sites More sharing options...
Boosted77. Posted March 15, 2008 Report Share Posted March 15, 2008 Chad, exactly. I bought an '86 modded ECU off EBAY proly 6 years ago with a JETPeformance chip in it. It said on the cover "25 psi boost cut" Still had a 13.5 psi cut. Hmmm. So I went to Radio Shack and grabbed a 10K Pot.. It worked... Basically, I came to the conclusion that the only way I'm evr going to see 15-18 psi on my 20g w/o fuel problems that is to change over to a '88+ set-up. All I need still is some decent Pri/Sec injectors. I've already got everything else for the (upgrade). The swap is a definate improvement. Link to comment Share on other sites More sharing options...
Chad Posted March 15, 2008 Report Share Posted March 15, 2008 i could get 23 PSI on a stock 12A turbo, but the bigger turbos flow more at lower pressures than that. It's not a boost cut, it's and air flow limit. Link to comment Share on other sites More sharing options...
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