Quote:
Originally Posted by cg285
i'll let you know after i finish playing with another eng for one of my trucks. i am going to start off slow and change a few items at a time so i can compare to a baseline vs making multiple changes at once.
what i can assure you is changing to an hei will have absolutely no affect on your mileage or hp. (and here is where a bunch can chime in to tell me i am wrong - but i am not) what you will get, by changing to hei, is loosing the periodic points replacement (although points will last 50k + if matched to the correct condenser) but that will be replaced by changing the module, periodically, while you are stranded dead in the water - UNLESS you use only delco components - especially the module - and follow the directions with the heat paste. and use plugs with a gap of .045 vs .060
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When converting to a bigger carb like I did on my 292...I'm running a 600 edelbrock 4 barrel...an HEI will make a difference..And No I'm not wrong...I've done tests of my own. When I was running points, my plugs were blacker then heck because a stock points coil maybe puts Maybe out 30k volts...where as a DUI or speed master ignition will put out 50k-65k volts. I converted to a 65k volt hei and now my plugs are showing a tad bit on the lean side. So an HEI Will make a difference...but if yer starving the engine of fuel using those original single barrels yer not gonna notice much of a difference. And alot of HEI's call for a gap of .045 anyway....but you Can gap the plug UP to .055 or .060.
