If you had a high speed miss before you installed the Petronix - you had something wrong with your original system. I.e., you are comparing "apples to oranges." And a 4 MPG gain? Again, your breaker system obviously was not working as designed.
Standard Petronix Ignitor kit offers no difference in potential firing voltage. Ignitor II and Ignitor III does raise "potential" voltage if you opt for a different coil.
I've got over 50 old farm tractors and crawlers. For the ones with gas engines? None miss-fire at high RPMs when tuned correctly.
Also have a 1970 Chevy Nova with a 307 V8. Ran fine with breaker points but needed a tune up once in awhile. Stuck in a later OEM GM breakerless high-energy ignition. Runs just the same and MPGs didn't improve AT ALL. But, no more tune ups and if a part fails - I can easily get at an auto-parts store since it's OEM GM parts and not after-market.
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Today's Featured Article - Usin Your Implements: Bucket Loader - by Curtis Von Fange. Introduction: Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he rea
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