madkaw Posted April 27 Share Posted April 27 I’ve been using Megasquirt 3x on my 3.2 for a while now . I had a knock sensor module installed on my X board . For some reason I can’t get it to work . I have a feeling there is a defect in the pin out during install . I’m not good enough to troubleshot bad install of a module and I’ve been reading about the usefulness of a cheap audio version that could made for 50$ . Background - I had to tear down my 3.2 because I had remove the crank to clean up the snout from a bad balancer . When I popped out #6 I found a broken top ring and evidence of detonation . Admittedly I was aggressive with timing and it bit me . There were no signs of the broken ring and the pulled 225 rwhp on the dyno . In fact that cylinder showed the highest CR = 220 psi This engine trans package is very noisy . I had straight cut gears and Kameari chain tensioner and a loud exhaust . I thought I heard ping around 4300 and attributed it to a rattling shifter - oops . # 6 was the only cylinder with any damage . I also pulled coolant from #6 at the head with a bypass to help mitigate problems . This time around I want to make sure this doesn’t happen again . I followed this you tube video. i was skeptical but it really works well. I drilled a hole above the freeze plug around 5&6 . Plenty of met there and there is a flat boss area for the sensor to sit flat against the block . You can hear the valve train clearly but you can also hear the ping clearly . I ended up pulling 4 degrees out of total timing on 93 octane . Megasquirt 3 allows for individual spark trim and I am going to try and isolate the issue to number 6 if that’s the case . Anyways - it’s not as good as real time retard available on ECU’s , but it is very effective to show some limits . 1 Quote Link to comment Share on other sites More sharing options...
zboi Posted April 28 Share Posted April 28 Can you share your ignition timing chart? Quote Link to comment Share on other sites More sharing options...
madkaw Posted April 28 Author Share Posted April 28 2 hours ago, zboi said: Can you share your ignition timing chart? Not a final version , but this is where I left it last run . This eliminated all pinging . I just started to dial in more fuel to see if I could raise timing . I also having trim tables to isolate #6 if that’s the offender Quote Link to comment Share on other sites More sharing options...
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