tyler031734 Posted May 29, 2010 Share Posted May 29, 2010 Ive been working on this 73 for a few years now. In its newest form its powered by a 83 hydro lifter head l28et. Ever since it was first installed it had a strange cut in the high rpm high boost area like a Total fuel cut, I figured I was to high of an RPM and just stayed away from it. Tack doesn't work so its by ear, anyways onward... I have a MSA down pipe to 2.5 crappy "turbo" reverse flow muffler, 75 intake, 2.5" IC piping and recently a Intercooler... with just piping and BOV (for drivable mock up)works great. Ran a little lean bone cold but as expected with stock ECU. BUT when the IC was put in it acts lean very easily now. I even bought a FPR with gauge and bumped FP From 32PSI right? to 40PSI. Seamed better but Its still not good. This set up ran 9 of 10 before the IC, now Its down to a 5. Isn't anyone else running an IC on the stock ECU? MSnS is in the future, its just so hard to let go of all that cash as I need one assembled... Any help is appreciated. Oh can I hook the old 83 tack wire directly to my 73 tack? Quote Link to comment Share on other sites More sharing options...
stravi757 Posted May 29, 2010 Share Posted May 29, 2010 Ive been working on this 73 for a few years now. In its newest form its powered by a 83 hydro lifter head l28et. Ever since it was first installed it had a strange cut in the high rpm high boost area like a Total fuel cut, I figured I was to high of an RPM and just stayed away from it. Tack doesn't work so its by ear, anyways onward... I have a MSA down pipe to 2.5 crappy "turbo" reverse flow muffler, 75 intake, 2.5" IC piping and recently a Intercooler... with just piping and BOV (for drivable mock up)works great. Ran a little lean bone cold but as expected with stock ECU. BUT when the IC was put in it acts lean very easily now. I even bought a FPR with gauge and bumped FP From 32PSI right? to 40PSI. Seamed better but Its still not good. This set up ran 9 of 10 before the IC, now Its down to a 5. Isn't anyone else running an IC on the stock ECU? MSnS is in the future, its just so hard to let go of all that cash as I need one assembled... Any help is appreciated. Oh can I hook the old 83 tack wire directly to my 73 tack? you need a resistor for the tach. Have you checked for any leaks in your I/C piping. Quote Link to comment Share on other sites More sharing options...
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