Sparkplugs? all 9's?
Sparkplugs? all 9's?
10-15-01, 11:45 PM
#2
GTR eater
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you can, but if your stock you won't see any benifits. colder plug also means you can't idle as long you WILL foul the plugs. me for instance i run 10's and 11's for driving on the street and 4 11.5's for race day!
10-16-01, 06:57 AM
#3
Greek Power
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Originally posted by soul assassin
you can, but if your stock you won't see any benifits. colder plug also means you can't idle as long you WILL foul the plugs. me for instance i run 10's and 11's for driving on the street and 4 11.5's for race day!
you can, but if your stock you won't see any benifits. colder plug also means you can't idle as long you WILL foul the plugs. me for instance i run 10's and 11's for driving on the street and 4 11.5's for race day!
Upgrading to 9s all around is not only for performance, but for convenience too (instead of 2 9s and 2 7s, just 4 9s). Anyway, in Greece I cannt even find 7s, so I'm stuck with 9s or colder...And who cares if the car will idle 5% "worse", when you'll most definitely see differences up high (especially in a TII).
10-16-01, 07:25 AM
#4
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i did notmean they would instantly foul out, just the colder you go the less you can put around 9's are no big deal though you start with 10's and up u better have a heavy foot. i still stick to my opinion on runnig 4 9's on a stock motor will bring you no more performance, you need to run more boost then you should notice a difference
10-16-01, 08:48 AM
#5
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if you are using NGK brand spark plugs the heat range is backward form most other manufacturers, the higher the number the "colder" the heat range. an "11" is colder than a "9". so going from 11 to 9 will resist to a certain degree fouling at idle. for a stock motor there is no reason except for sustained freeway driving to lower the heat range of the recomended spark plug. even on my race only street ported motor I run the stock heat range.
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10-16-01, 12:59 PM
#8
Soul Assassin is right... I have ran 11.5 before and they don't last long, as they tend to foul up easy on the street. The reason why you would run colder plug in the first place it to prevent detonation at top end. Another drawback of a race plug is that you might have starting problems if you are in a colder climate.
...jk i think its around 60k
10-16-01, 10:30 PM
#12
mad scientist
My 90 GTU eats spark plugs. I just replaced my leading plugs that were 8K miles old. They were worn to the point where I was losing power. The center electrode was completely rounded off and much smaller than it should be, and the gap was about double that of a spark plug. I cleaned them every oil change too.
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