Re: electronic ign. for an H

Posted by Bob Kerr on July 04, 2007 at 21:42:21 from (64.12.117.8):

In Reply to: Re: electronic ign. for an H posted by Bob Kerr on July 03, 2007 at 22:04:07:

One thing I can add to this is "marketing" has convinced a lot of people it is better across the board for every engine. on a low compression engine low RPM engine, you just flat out do not need 50,000 volts unless you want to screw up TV reception for a square mile. In a low compression low RPM engine the piston moves much slower and has the time to ignite the fuel mixture. In a High compression High RPM engine The piston moves much quicker and there is less time to get the complete burn, PLUS and this is the big point with high compression, The plug air gap acts as an insulator so if the specification is for a wide gap it must use a hotter coil, Higher compression, more air in less area, higher insulation factor. The last time I checked , most farmalls have about 6-1 compression and some older ones only have 4-1, and don't run at 8000 RPM (at least for long they won't) and that is a far cry from needing racing parts. Like one other guy said, it is your tractor and your money and I am not saying rip it all off and get rid of it, but I can see the marketing people smiling, they did thier job well. They have also managed to sell refrigerators to eskimos!(no kidding!) A set of points if everything is set right will last 10+ years. The points in Dads ferguson have been in for over 20 years worked hard every summer and not one problem, but we don't leave the key on when not running, that will cook a set. Here is a good example of Marketing driving a way of thinking. Bosch came out with the platinum spark plugs back in about 1990 or so. They had a HUGE marketing blitz about the benefits. Everyone and thier mother ran out and bought those things.Same thing happend with those "splitfire plugs", can you even buy those anymore?. (Platinum plugs are not a new thing, I have an ad from 1909 for platinum plugs) I was working in a shop doing engine runability and tune ups, and after a while when a car would come in with a miss, first thing I would do was pull out those botched bosch plugs. 9 times out of 10 it was problem solved. I wasn't putting in just one brand either, I put in the type that came from the factory whether AC autolite or champion. Some of the Bosch plugs I pulled out were brand new less than a week old. There is only one aftermarket igition system I have heard of that acually does improve performance in car and truck engines and it is the MSD, but in the average car the benefit is only minimum. In race engines, it is big! Sorry to rant, but hey guys, just be critical of what the marketing people "say you need". Chances are the CEO needs a new wing on the mansion to house his Rembrants.

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