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Message: <blockquote data-quote="swampratt" data-source="post: 3056732" data-attributes="member: 15054">It is higher if it needs to be.My wife's corolla well mine now.. would have carbon tracking lines on the porcelain very faint but you could see it was miss-firing.I had to tighten the gap to .0025" and it smoothed out and I had tried many different spark plugs..Seen the same on one of the dual turbo Forv V6 engines. tighten the gap and all solved.I had used a Big Allen oscilloscope to check spark voltage and watch it on the big screen.I tested a factory GM HEI VS a GM single point distributor.45,000 volts on the HEI at idle and to about 2000 rpm then voltage took a steep curve down and by 5000 rpm it was down to 15,000 volts.The single point started at 35,000 volts and at 5,000 rpm was at 25,000.I tested the same 2 at the track and this was a high compression 350 11.9 compression and 245 psi crankin pressure.The single point was 2 tenths quicker with the same curve.. shift point on that little cam one then was 6900rpm.But yea the majority of vehicles do have a hotter spark available.</blockquote>