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Spark plug heat ranges
I’m trying to understand spark plug heat ranges, I know the ac delco heat ranges starting at 41 going up get hotter, what I don’t understand is I see ac delco iridium plugs and others listed on summit with heat ranges of 16 +/- ! How do these heat ranges compare to the 41-46 heat ranges with 46...- 82BBC20
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- Replies: 19
- Forum: Tech Discussion
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TBI to Carburetor trans issue
Hey guys I need a little help, just completed a carburetor swap from tbi on a 92 suburban 2500 with a 454 & a 4L80 trans 2wd. Transmission is not shifting right & no OD, I was told 91 & 92 4L80’s were non computer controlled but after doing more online research it sounds like I may need...- 82BBC20
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- Replies: 1
- Forum: Tech Discussion
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Low Beam vs High Beam
My 82 C20 has the dual stacked headlamps, when lamps are on the low beams come on up top then hit the dimmer switch (floor button) & it switches the lower lamps on but the upper lamps go out. I thought all 4 should be on when brights are on, Anybody know for sure?- 82BBC20
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- Replies: 8
- Forum: Tech Discussion
