Gtech performance Posted August 9, 2022 Report Share Posted August 9, 2022 Hey guys how are you? IV got a thunder in a vl with an rb30. It was running wasted spark with an el cool pack and I have just wired up 6 r35 coils using 6 ignition out puts. I have change the ignition mode to direct spark. The car doesn't start. And looks like the timing out. Should the car start? Or is this normal and Im not doing something to get it going? Quote Link to comment Share on other sites More sharing options...
dx4picco Posted August 9, 2022 Report Share Posted August 9, 2022 If your trigger system didn't change then you may just be 360° out. Change your offset by adding or subtracting 360 Adamw 1 Quote Link to comment Share on other sites More sharing options...
Gtech performance Posted August 9, 2022 Author Report Share Posted August 9, 2022 hi dx4picco yeah the trigger system is still the standard rb crank angel sensor. thanks heaps for that. il give it a go in the next few days and let you know Quote Link to comment Share on other sites More sharing options...
Gtech performance Posted August 9, 2022 Author Report Share Posted August 9, 2022 3 hours ago, dx4picco said: If your trigger system didn't change then you may just be 360° out. Change your offset by adding or subtracting 360 Sorry quick question, did you mean 180 or 360? Quote Link to comment Share on other sites More sharing options...
dx4picco Posted August 9, 2022 Report Share Posted August 9, 2022 If you are in wasted spark, you are sparking once every engine rotation. On end of compression /power stroke and once during exhaust stroke. If you now change to direct spark, you will only have one spark event per cycle. Every 720°. If you trigger is adequate (cam sync, map sync) you engine knows where he is in that cycle and can spark before you compression tdc. Now let's say you set up this point to be during the exhaust stroke when you had wasted spark, it was still working properly because it was sparking 360° after anyway. Now that you spark only once, then you may spark on the exhaust stroke and it doesn't work. The best way to be sure is pull the plugs and watch with a timing light where you are related to you tdc. If it is correct but doesn't start then you may be on exhaust stroke and changing 360° may solve that. Vaughan 1 Quote Link to comment Share on other sites More sharing options...
Gtech performance Posted August 10, 2022 Author Report Share Posted August 10, 2022 Ok cool so if I'm understanding correctly, my offset at the moment is 276 so do i change it to 636? Quote Link to comment Share on other sites More sharing options...
Vaughan Posted August 10, 2022 Report Share Posted August 10, 2022 16 minutes ago, Gtech performance said: do i change it to 636? -84 Quote Link to comment Share on other sites More sharing options...
Gtech performance Posted August 10, 2022 Author Report Share Posted August 10, 2022 ah huh got it thanks heaps for your help guys il try it and let you know Thanks again Vaughan 1 Quote Link to comment Share on other sites More sharing options...
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