Im new to the tuning scene...I have a 94 cobra with a built motor. I have read alot of things about tuning this computer, and have a couple of questions. My motor is as follows 331 10.5 comp AFR 205s set up by Ed Curtis comp xe270hr scorpion 1.6s Victor 5.0 efi stage 3 portjob Accufab 85 race tb-fox style 4in powerpipe PMAS 6" velocity mass air calibrated to j4j1 ecu Kooks 1 3/4 widebolt longtubes factory ls1 injectors Accufab adj reguator 190 intank pump Since I put this together it has run flawlessly, power everywhere-idle to redline, I couldnt be happier...when I had it dynoed it put 382hp and 370lb on a Dynojet. I am located at 4600 ft in Utah. Everyone on here has issues with idle problems, surging, running poorly...etc. I have just let the ecu do its thing, and Im happy. Everyone turns to the Tweecer, but I dont trust myself to tune it properly. I know theres more in there, but how much exactly? do you get more driveability than power? I would like to pick the brains of the experienced, and to learn in the process...thanks
so your running a stock j4j1 computer without a tune? do you have a wideband? how was the a/f ratio on the dyno?
I pulled in for my real world numbers, no cool down time. first pull... this one I added some fuel, but pulled the belt to see what a Merzire electric waterpump and power pulleys would do...
You'd get both drivability and max power if you optimized your pcm I can tell you my sig combo was just awful before I used a Tweecer to make it behave like a little stocker It surged, bucked, stalled out at lights, and would not idle at anything less than 1200 rpm After I got all the drivability issues half way decent I picked up a good bit of max power with the maf transfer, spark/fuel tables Yes you can use a Tweecer but you can use other methods as well I would have to say ... ANYONE ... can tune their own car :Word: Then again ... some just don't want to They don't have the time or patience or ... what ever I could not say if self tuning is the right thing for you I had a lot of fun learning about the pcm and how it goes about doing its thing and I dealt with some really cool peeps in the self tuning community as well Grady
I am kind of in same boat i have a 95 sc 5.0 with tfs stage 3 top end.I just purchased the QH tuner from moats and EA AND BE.MY car ran really good with my mods on stock comp.it ran flawless on the street.also had good performance.ran 12.20@125.i have only changed my maf curve and tring to get inj slopes correct.i cant believe the better power band.before i only ran a 56%load now im at 70% its noticable.im way off because im so comp. stupid but if your good with comp. and have the time to make small changes then datalog i think its good.you can also do cool things loke lower coolent temp/turn off rev. limitor and others.so go for it
