Join Date: Sep 1999
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Re: Speaking of GM HEI
Well, I referred to the Jeep Owner's Bible and I didn't recall correctly about what was written there. Ludel mentions on pg. 288 in the section concerning performance up grades for the Chevy 2.8L V-6 that Chevy Performance people recommend eliminating the separate coil for racing purposes. Now I don't believe I would EVER want to race my 1986 stock XJ. (although I know it would blow the doors off an original VW Beetle--ha ha!)
I suppose there are some advantages to a HEI w/separate coil, one being clearance. My distributor is mounted behind and under the air cleaner and the coil is above the passenger side valve cover, towards the fire wall. Both put of the way of road water spray. I know that some GM engines, like the ones in Chevettes, the distributor is mounted forward on the driver's side and is very prone to getting wet. A friend of mine had an 81 to get around in and always was out in the rain, spraying WD-40 on his distributor on the side of the road. He finally bought a new Cherokee.
Another problem with the coil mounted in the cap might be heat build up but this might not be a major concern, though. Air moving thru the engine compartment would be able to cool the coil better if it was separate from the cap.