Plug wire, spark plugs and dwell, New info on post 24 |
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Plug wire, spark plugs and dwell, New info on post 24 |
VaccaRabite |
Apr 18 2019, 04:02 PM
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#1
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En Garde! Group: Admin Posts: 13,432 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
So my car starts bucking again on todays shakedown cruise (and with the PA roads this spring it is REALLY SHAKING!). I pull back home guessing the #3 lead came off again. With the car running I touch the lead pull it off the #3 plug. While I'm doing this the plug wire is shocking the hell out of me!
Like an idiot I stand there looking at it (as it continues to shock the hell out of me) until I drop it and I hear it arcing against something in the engine bay. I turn off the car and remove the entire lead (I have coil near plug, the lead is only about 6 inches long). Flexing it all over, I can't find ANY breaks in the insulation. these leads are almost brand new, and only have about 200 miles on them. They are very flexible and the insulation seems to be in great shape. The pulse was jumping through the insulation on the wire and arcing against the powdercoated #3 intake runner, causing the bucking. The coil pack is certainly strong! I moved the wire as far as I could from the intake runner (the pack is bolted right next to the intake runners, so I can only move it so far) and the car ran flawlessly. I went on a 30 minute drive and it was AWESOME. So... what next. On a wet day its going to be arcing everywhere. I've sat through that ride before. Maybe make new leads with thicker plug wires? Do I need spiral wound? @mcmark @spoke |
VaccaRabite |
May 23 2019, 08:39 PM
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#2
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En Garde! Group: Admin Posts: 13,432 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
After the lightning, thunder, hail and a possible tornado I got to drive the car this afternoon.
These are the NKG BP5ES plugs gapped to .045. First thing I noticed was that the car was idling more evenly. But I just chalked this up to new clean plugs. Second thing I noticed was that my CHT was reading about 25-50 degrees hotter. You could really notice the one range hotter plugs on the CHT. The car has a bog just off idle that needs to be tuned out. It’s drivable but you have to be ginger getting going from a stop. It also pops a little on over run. Not loud, and not all the time, but it’s there. I’m looking for a place in the area that 1) knows aircooled and 2) knows Microsquirt for some dyno tuning. I think I have the plug issue fixed. I’m thinking either Steve Limbert at Aircooled Racing or Paul at Euro something in Harrisburg. Translog here in York knows my car, but I don’t think he really knows MSII. Or at least did not a few years ago. But I’ll give him a call and see. Zach |
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