mom'sZ Posted January 29, 2007 Share Posted January 29, 2007 I have a 1977 280z. It is being prepared for SCCA improved touring road racing. Currently in improved touring, there is a move afoot to change the current ECU rule as it pertains to fuel injected cars. A little history, currently, you are allowed to put any ECU in that fits within the stock ECU housing. You must retain all stock sensors and the stock harness, you may not add any sensors or wiring. The rule was made, most feel, because some guys were reflashing the stock epprom chip and there was no way to police it. It was felt that opening the rule up would at least give everyone the same advantage as the cheaters. Most in the class have felt the rule change sucked and want it changed. Some want to go back to stock ECUs only, but that would be impossible to police. Others want the ECU to be completly open, allowing any ECU, sensors and harness. The problem is that many models have a very tiny ECU housing. Some big dollar teams have figured out how to stuff a MOTEC in there box and have fully programable injection but it's expensive to do. A third camp wants to allow only reflashing the original chip or replacing the original chip but retaining the stock board. Most modern ECUs have a epprom chip that can be unsoldered and replaced. So... here is my delemma and my question, the stock 280z does not appear to have an epprom. I had originally planned to put a megasquirt inside my original box, it's pretty big and fitting it would be no problem. I had figured out how to run it using only the stock sensors. If the rule change is made only allowing reflash or rechip, how to proceed? I have search, and read what information I have. The factory service manual contains a block drawing of the circuit, and an explanation of how the components work. Has anyone tried to work on one? Does anyone have any information about it or modifying it? I know JWT supposably has cracked it and can change it. Does anyone who knows more about electronic know how to at least get started? ANYONE having ANYTHING that might help me? Sorry for long post... thanks everyone. Quote Link to comment Share on other sites More sharing options...
TimZ Posted January 30, 2007 Share Posted January 30, 2007 I have a 1977 280z. It is being prepared for SCCA improved touring road racing. Currently in improved touring, there is a move afoot to change the current ECU rule as it pertains to fuel injected cars. A little history, currently, you are allowed to put any ECU in that fits within the stock ECU housing. You must retain all stock sensors and the stock harness, you may not add any sensors or wiring. The rule was made, most feel, because some guys were reflashing the stock epprom chip and there was no way to police it. It was felt that opening the rule up would at least give everyone the same advantage as the cheaters. Most in the class have felt the rule change sucked and want it changed. Some want to go back to stock ECUs only, but that would be impossible to police. Others want the ECU to be completly open, allowing any ECU, sensors and harness. The problem is that many models have a very tiny ECU housing. Some big dollar teams have figured out how to stuff a MOTEC in there box and have fully programable injection but it's expensive to do. A third camp wants to allow only reflashing the original chip or replacing the original chip but retaining the stock board. Most modern ECUs have a epprom chip that can be unsoldered and replaced. So... here is my delemma and my question, the stock 280z does not appear to have an epprom. I had originally planned to put a megasquirt inside my original box, it's pretty big and fitting it would be no problem. I had figured out how to run it using only the stock sensors. If the rule change is made only allowing reflash or rechip, how to proceed? I have search, and read what information I have. The factory service manual contains a block drawing of the circuit, and an explanation of how the components work. Has anyone tried to work on one? Does anyone have any information about it or modifying it? I know JWT supposably has cracked it and can change it. Does anyone who knows more about electronic know how to at least get started? ANYONE having ANYTHING that might help me? Sorry for long post... thanks everyone. The stock ECU for the '77 does not have any sort of EPROM - as far as I know it's all analog, so good luck 'cracking' that. I seriously doubt that JWT can change the calibration of the stock 280Z ECU. You are probably thinking of the 300ZX ECU swap that they do. As I see it, your only way forward (aside from just using the stock ECU) would be to stuff a progammable ECU in the stock housing. If the rules won't allow it, then you are SOL (or you can always cheat ). Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted January 30, 2007 Administrators Share Posted January 30, 2007 Tim is right... there is nothing to re-flash. If you're the creative type, you can stuff a Wolf V500 in the OE case.... Let me know if you need one of those Quote Link to comment Share on other sites More sharing options...
alexideways Posted January 30, 2007 Share Posted January 30, 2007 You ca get good prices on Wolf ECUs Ron??? Quote Link to comment Share on other sites More sharing options...
AK-Z Posted January 30, 2007 Share Posted January 30, 2007 Or you can do the z31 ecu conversion and re-flash that. Quote Link to comment Share on other sites More sharing options...
Administrators RTz Posted January 30, 2007 Administrators Share Posted January 30, 2007 You ca get good prices on Wolf ECUs Ron??? I'll knock $100 off retail to anyone donating $25 to HybridZ in the preceding 12 months. Quote Link to comment Share on other sites More sharing options...
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