MSD 6010 not enough coil dwell time?
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On The Tree
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MSD 6010 not enough coil dwell time? I have been fighting getting my 402" LS2 to turn over 6900 rpm, at first i blamed valve springs but now i believe it is a ignition break down from inadequate coil saturation time? Can anyone help me with this?
MSD is looking in to this for me, no answers yet.
MSD is looking in to this for me, no answers yet.
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On The Tree
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The engine violently shakes and pops when you reach 6900 rpm, no valvetrain damage or spring tension loss occurs. I talked briefly with a tech at MSD and he feels it could be a problem with controller coil dwell time being inadequate, he is consulting the engineer that designed the LS1 controller.
I figure they didnt reallize customers would be looking for over 7k operation ?
I figure they didnt reallize customers would be looking for over 7k operation ?
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On The Tree
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My friend Joe Sherman and i have considered this and he nor i have ever seen anything like the phenomenon we witnessed first on his dyno than in the car at several different race outings. Detonation from inadequate octane does not show up as a chaotic missfire like this motor is experiencing, there are no signs of detonation on the spark plugs either. I'm open minded to anything that could be causing this problem but it seems to be ignition breakdown to me. I dont believe most people using carb conversion MSD controller are spinning above 6900 rpm so this problem is mostly being uncovered by me. Any help appreciated.....
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You could try switching to a truck type coil. I know that the required dwell times are different for each coil, and it just might be the ticket. I know we run the 6012 boxes just fine so far to 7400 on dirt modifieds.
Are you using the software to set the timng, or the chips?
Are you using the software to set the timng, or the chips?
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On The Tree
Joined: Nov 2005
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You could try switching to a truck type coil. I know that the required dwell times are different for each coil, and it just might be the ticket. I know we run the 6012 boxes just fine so far to 7400 on dirt modifieds.
Are you using the software to set the timng, or the chips?
Are you using the software to set the timng, or the chips?
Thread Starter
On The Tree
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Staging Lane
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Have you tried tightening up the plug gaps? Since dwell time is basically how much time the primary side of the coil gets saturated with voltage before releasing the secondary spark, a smaller gap may help by making it easier for the spark to jump the gap. From the way you describe it, it does sound like spark blow out or a weak spark.
Does it do this real bad on the 2-3 shift (if you have a auto trans)? I have tried alot of different engines, 5 to be exact and alot of different valvetrain options. My most troublesome proplems, have been in the proper valvetrain set up (harmonics).
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Yes it does it on 2-3 shift but its rpm related, i am seriously thinking my plug gaps are too large for the MSD and factory coils, i will tighten them up and retest sunday. I have upgraded my valve springs once and it had zero effect on problem.
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On The Tree
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I closed up my spark plug gaps and the problem was still there, any more people successfully running MSD 6010 above 7k with pump gas LS2?
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Ok i found my problem finally, the engine goes into a uncontrolled combustion with over 6800 rpm and 34* of advance with 91 octane pump gas. First i reset total timing to 26* and it revved clean to 7500 no problem. Next i pumped all the 91 octane out and added c-16 VP and i reset timing back to
34* again, this also ran great to 7500 with no hiccups or glitches.
Thanks to everyone who chimed in, i plan on running 34* with a mix of race gas and pump.
34* again, this also ran great to 7500 with no hiccups or glitches.
Thanks to everyone who chimed in, i plan on running 34* with a mix of race gas and pump.
Uh huh! 
