Theres been some testing done that showed some of the truck coils put out more than the LS1 coils, but nobody sees any dyno results I don't think. I would only use them if I was going to relocate under the cowl for more clearance, since they're smaller. On a side note, whens about a good time to replace the stock coils? Mine have probably 150k on them now. Where could I get some decently priced stockers?
__________________ 1999 Trans Am : '03 LS6/T56 swap 422rwhp/402rwtq Tuned by Ryne@CMS
my friend put these on his procharged c5 z06 and had nothing but problems with them. the build quality seemed pretty shotty. kept getting corroded and grounding themselves out against his valve covers causing misfires all over the place. he ended up just putting the stockers back on and throwing the MSDs in a box in the closet.
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2005 C6 Corvette--Eh, it does alright
2003 Cobra--Sold, but another may be en route
1996 Jeep Cherokee--6.5" lift, BFG A/T's, Mud/Winter Vehicle
1995 BMW 540i M-sport--Daily
1967 Mustang--331 stroker
I was reading over the weekend that the problem with the msd coils is that the factory settings for dwell time is too much. Think of dwell time not as discharge time, but rather charging time. If you charge them too long, they will burn out. Someone had actually contacted MSD and found out that the factory ls1 settings were charging the coil packs too long, which is what was causing them to crap out because you were overheating them by having too high of a dwell time.
I just switched over to the Yukon/Truck 6.0l coil packs and it helped to reduce some of the random misfires and throttle response is a little cleaner as well. Who knows if I gained any full throttle hp, but for better drivability, it was certainly worth the $130 I spent.
After my first set of 8 MSD LS1 coils purchased about 3 years ago, I have replaced 5 and 4 of them at my $. Talked to MSD reps at the local dragstrip to see what was happening? Missfire at high rpms? No help, so have been running stock LS1 coils for about 2 years.
__________________ -2002 Sierra, 408 Lunati Stroker, Lunati Voodoo cam , L92 Heads, L76 Intake, Circle D +4C Converter, 4L65E Baby Boy built, 9.5" 14bolt rear end, 4.10 Trutrac.
