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Cole Man II
05-24-2005, 01:11 PM
Hay buddy,
My question is regarding a plug check. After making a WOT pass, shuting down and coasting to a stop, do you usually check all your plugs or just one or two? If only one or two, are there certain cylinders that give a more accurate reading for one reason or another?
Thanks,
Fiat48
05-24-2005, 01:40 PM
Usually #5 and # 6 will show the most heat. Not always but the best ones to check. If you read plugs the way I do.....makes no difference if you idle or cut it clean. You are reading cad burnoff.
Cole Man II
05-24-2005, 01:45 PM
I have been looking at the color. Do you have any good photos that show the cad burn off.
Fiat48
05-24-2005, 01:56 PM
These are alcohol but still looking at the same thing:
Picture #1. Ground strap heat only. Base cad not burned off. No insulator spotting. Dead Fat.
http://www2.***boat.com/image_center/data/520/3745-med.JPG
Picture #2: About 1/2 the base cad burned off. No spotting. Still fat but better.
http://www2.***boat.com/image_center/data/520/3743-med.JPG
Picture #3: All the cad burned off. About as far as you need to go.
http://www2.***boat.com/image_center/data/520/3741-med.JPG
THIS IS ONLY FOR NKG PLUGS. Standard disclaimer applies. :messedup:
Cole Man II
05-24-2005, 02:59 PM
Fiat48,
Thank you very much for those photo's, a picture is worth a thousand words.
Can I expect the same results on the plugs when running race gas vs. you running alcohol?
Fiat48
05-24-2005, 04:49 PM
Yes. The plug insulator may be darker and you may have to wipe a light soot from the plug but cad burns all the same. You may have to do a few runs to get cad burn unblown also.
blowngas
05-24-2005, 07:57 PM
use some brake cleaner to wash the soot off of plugs when running gas---will not remove discoloring on plug or remove any cadium----just cleans it up so you can see how much cadium got burned----NGK plugs
Fiat48
05-24-2005, 09:13 PM
use some brake cleaner to wash the soot off of plugs when running gas---will not remove discoloring on plug or remove any cadium----just cleans it up so you can see how much cadium got burned----NGK plugs
Blown Gas tuneup: NGK 6 or 7 heatrange. Lean it or bump the blower till it saws the ground strap. Fatten it 10 and go to cold plug. :squiggle:
Ever do that?
Cole Man II
05-25-2005, 11:05 AM
Thanks for the tips guys.
blowngas
05-25-2005, 11:08 AM
Lean it or bump the blower till it saws the ground strap. didn't get quite that aggressive, but yeah, that's about what we did :jawdrop: