I have a stock car that has ~50ms dwell time when cranking (scoped), then it ramps down to 4.0-6.0ms after starting on the stock ECU.
I can only get up to 25.5ms with the MS3, and that's after I change the crank_dwell upper limit value from 8.0 to 25.5.
Obviously this being a U08, it can't go above 255, ie 25.5ms.
I would love to be able to go above 25, ie 50ms like on the stock car, just to see if it starts any better when completely cold.
Comments?
Cranking dwell limit
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Cranking dwell limit
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2005 Audi A3 2.0L TFSI DSG AWD - Extreme MS3
2002 Mazda Miata 1.8 6sp - Enhanced MS3 1.4.0, sequential injection, sequential ignition, big turbo, lots of boost
2005 Audi A3 2.0L TFSI DSG AWD - Extreme MS3
2002 Mazda Miata 1.8 6sp - Enhanced MS3 1.4.0, sequential injection, sequential ignition, big turbo, lots of boost
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Re: Cranking dwell limit
If you scope the coils current I am sure you will find it goes into saturation well before 50 mS even if that is what the factory uses for crank. Going beyond saturation is useless and very hard on the coils.
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Cheers Luke
Cheers Luke
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Re: Cranking dwell limit
It is indeed true that some cars deactivate dwell limiting (entirely) during cranking. I have never seen this really neccessary though.
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