HEI vs TR - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 11-11-2002, 01:38 PM
MaineJeep
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HEI vs TR

I'm looking for opinions on this. I've done the TR Upgrade to my 87YJ and it seems to work OK, although I don't notice any big improvement, if any at all. I have gone through 2 Modules since doing the conversion(the NAPA brand that came with the Jeep and a Wells-AutoZone) since last summer and only 1500 miles. I'm not saying it has anything to do with the TR upgrade but I'm thinking I'd like the supposed overall reliability of the HEI over the Motorcraft.
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post #2 of (permalink) Old 11-11-2002, 02:01 PM
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Re: HEI vs TR

Have you checked the voltage at the coil after your upgrade?
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post #3 of (permalink) Old 11-11-2002, 03:51 PM
 
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Re: HEI vs TR

Make sure your module is at full battery or alternator voltage. Some guys are making the mistake of supplying the module with the resisted voltage instead of full battery or alternator voltage. I have heard of a couple modules frying and one that overheats because of this.
The coil should be at battery voltage when starting and 7-9.5v when running. It depends on your resistance wire values.
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