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mppickett mppickett is offline
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Join Date: Oct 2005
Location: Barrington, RI
Posts: 593
You've got it right about NGKs - low numbers are hot & high numbers are cold. I was guessing that my engine profile was most like a 993 (EFI/EDIS ignition). As far as I can tell the OEM NGK for the 1997 993 turbo is a "6" heat range. So I went one colder and am using a "7." So far they're the right color and I'm not getting pinging.


Quote:
Originally posted by sand_man
I think with NGKs as the numbers decrease the plugs get hotter...and with Bosch as the numbers increase the plugs get hotter...I THINK. So I think the NGKs that you are running are actually hotter than stock.

EDIT: or maybe I'm just talking out of my @ss and I've got this hot/cold thing all wrong!
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Old 12-14-2006, 12:04 PM
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