Guest das280zx Posted July 11, 2004 Share Posted July 11, 2004 Recently I was kind of looking into the specs on haltech's as I wanted to get one when I had that much disposeable income. Well anyhow I found out that they don't have knock control (as far as I know). I want knock control because I might sometimes want to run something other than 92 octane, plus on a turbo car I believe it can be good ensurance, especially when you are fidling with fuel maps boost. Well the zxt already has some form of knock control, I was wondering if the stock ecu would still control the spark if you disconnected everything else and used a fuel only computer such as the megasquirt to control the fuel. Just an idea. I could set that all up pretty cheap if it did work. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted July 12, 2004 Share Posted July 12, 2004 A computer may control knock, but first knock has to occur and then the sensor picks it up. That is still better than it just continuing to happen, but the point is that it still occurs with even knock control. I wouln't try to run in a condition that will cause knock and just rely on the ecu to keep your engine together. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted July 13, 2004 Share Posted July 13, 2004 BTW, i wasn't putting down your idea of using MS with the stock ECU. I thought about it before my conversion, but it seems that you have to keep many stock sensors and it is hard to now exactly which ones. If you have to keep the AFM that is a big downside, because the MS conversion gets rid of the AFM. I would say go ahead to MSnS that has spark control and use a bosch knock sensor unit with it. I believe a few people are doing this on the MSnS yahoo group, you might check into that. The more you push the limit of boost the less you can count on the knock sensor to save your bacon. Quote Link to comment Share on other sites More sharing options...
Forrest Posted July 14, 2004 Share Posted July 14, 2004 If you want a really kickass knock sensor that will retard ignition on only the cylinder that it detects knock on, check out http://www.jandssafeguard.com -Forrest Quote Link to comment Share on other sites More sharing options...
ToplessZ Posted July 14, 2004 Share Posted July 14, 2004 For some reason that does not look like cheap solution. Although if you were pushing your engine to its boost limits it may bee a good investment. Quote Link to comment Share on other sites More sharing options...
fl327 Posted July 14, 2004 Share Posted July 14, 2004 the zxt knock sensor is a joke, ask any of the turbo guys running or ran with factory fuel systems. j and s knockguard is good. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted July 14, 2004 Share Posted July 14, 2004 the zxt knock sensor is a joke, ask any of the turbo guys running or ran with factory fuel systems. j and s knockguard is good. I'm glad to hear that, as my Z31 ECU knock signal would not work with the L28. I just disconnected it to kill the error code, and I hope I don't get knock. Quote Link to comment Share on other sites More sharing options...
fl327 Posted July 14, 2004 Share Posted July 14, 2004 If I have mine off or on,it makes no difference. Quote Link to comment Share on other sites More sharing options...
Guest das280zx Posted July 15, 2004 Share Posted July 15, 2004 Thanks for the replies. I don't plan on really pushing the limits, just thought it would be nice to have, especially if somebody put low grad gas in or something. I am going to look into this megasquirt more, as it looks like a fun thing to tinker with. Quote Link to comment Share on other sites More sharing options...
Forrest Posted July 16, 2004 Share Posted July 16, 2004 I said good, not cheap. Most of the time those things mean polar opposite. Quote Link to comment Share on other sites More sharing options...
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