clocking spark plugs?
Melting Slicks
Joined: Mar 2007
Posts: 2,100
Likes: 12
From: Frederick Maryland
For a street car it means nothing. For a car running such low times at the track...every little thing you can do is a help...even if it's just a feel good thing.
The performance gains might be technically measurable, but in the real world of street driving, it's likely no more than a mirage. Keep your entire ignition system in top condition and something like clocking your spark plugs is unnecessary.
For a car with nitrous, I'd be more concerned about making sure the engine doesn't blow up from overdoing it.
The performance gains might be technically measurable, but in the real world of street driving, it's likely no more than a mirage. Keep your entire ignition system in top condition and something like clocking your spark plugs is unnecessary.
For a car with nitrous, I'd be more concerned about making sure the engine doesn't blow up from overdoing it.
Instructor
Joined: May 2010
Posts: 113
Likes: 0
From: Shelby Twp. Michigan
I've been running Nitrous on my cars for years and never indexed the plugs. I think it's more important for the guys runnin' big kits, or multipable stages. For a street car fuel pressure and ignition is all you'll need to be worried about.
Race Director
Joined: Jan 2000
Posts: 13,022
Likes: 2,265
From: Corsicana, Tx
2020 C2 of the Year - Modified Winner
2020 Corvette of the Year (performance mods)
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The interesting part when you dig into it is that there are several versions of what *optimum* indexing of the plugs should be. Some have big domes on pistons and need to keep from hitting ground straps. Some don't have any fire slots in domes and want to get fire over the dome, some want to keep plug cool with fuel wash, some want to aim it to hottest part of chamber, some want it up, some want it down...........
The only way to know what your motor might like is to do a lot of testing. Might help a hair....might mean nothing.
JIM
The only way to know what your motor might like is to do a lot of testing. Might help a hair....might mean nothing.
JIM
Burning Brakes
Joined: May 2008
Posts: 860
Likes: 0
From: Stratford Ontario
Clocking was originally done because domes were hitting ground tabs. I wouldn't waste too much time on this unless You think its not firing right on some cylinders. Its a lot of work for nothing. Also be carefull what You use to mark the plugs with because that could be the easiest ground for Your spark, and You could weaken spark to cylinder. Just My 2 cents.
