Nismo280zEd Posted November 10, 2009 Share Posted November 10, 2009 Ok... so by some dumb luck I stumbles across some outstanding information on the COP units I'm trying to run with megasquirt. I have a chart showing current (amps) in relation to battery voltage (Ubatt) what the charge time would be for the COP unit. I was trying to figure out at redline (6,500rpm) how many ms exist between each spark event. Then I could compare that number to the one I have for charge time and figure out if the COP can charge up before being asked to fire at redline. So... here is the math I did (6,500revolutions/1 minute)(1minute/60 seconds)(1second/1000ms)(6sparks/1revolution) that gives me (sparks/ms) which is .65 so we take the inverse of that which gives us (ms/sparks) which is about 1.538. So in theory I have 1.54ms between each spark event at 6,500rpm right? And my cop @ 7.5amp and 14v require between 1.8 and 2.0ms to charge. Now... I running MSnS and trying to configure it as wasted spark 2 coils fire at the same time. So... my question is... My 6sparks/revolution... is that correct for say OEM type ignition distributor and coil? Also... with my wasted spark setup.. will this change to 3spark/revolution or... would it change to 12..? Little tired from work and wanted to run this by somebody else to see what they think. Thanks, -Ed Quote Link to comment Share on other sites More sharing options...
olie05 Posted November 10, 2009 Share Posted November 10, 2009 you should be using 3 sparks per revolution. but really if you are doing wasted spark ignition, you are only interested in 3 sparks/2revolutions as it relates to coil charge time. If you are doing a true COP ignition setup then you are only interested in 1 spark/2 revolutions for coil charge time. You should not be running into a situation where coil dwell time is limited by anything more than 3 spark events/2 revolutions if you are running either COP or wasted spark. Edit: Care to share the information you stumbled upon? Quote Link to comment Share on other sites More sharing options...
Nismo280zEd Posted November 10, 2009 Author Share Posted November 10, 2009 lol I'd love to man, but UH and my laptop haven't gotten along this past week. Ever since I updated AVG the firewall has locked me out of UH wireless. Spent 4hrs thursday, finally got it to work, now it took a crap again. It's on Bosch website. I'll post the link when I get home. -Ed Quote Link to comment Share on other sites More sharing options...
Nismo280zEd Posted November 12, 2009 Author Share Posted November 12, 2009 Ok, Here is for the specific coils I'm using http://www.bosch-motorsport.de/pdf/components/ignition_coils/Single_P50_P50_M.pdf I'm trying to get the base site that had the list of all the coils... but I'm a genius and didn't book mark it. I know I tracked it down through a Pelican thread. EDIT.. found the linke http://www.bosch-motorsport.de/content/language2/html/2847.htm that is the base site for the coils. -Ed Quote Link to comment Share on other sites More sharing options...
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