plug gap
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New User
Joined: Dec 2005
Posts: 18
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plug gap
hey anyone change their plug gap if they have intake upgrades. I read on a super charger site that it's usually required to reduce the gap with the amount of air being pulled. I know I am not pulling anything near as much. but just wondering. I've got a K&n air intake with the airaid throttle body spacer. whistles like a turbo. sounds great
Lead Driver
Joined: Sep 2003
Posts: 5,844
Likes: 6
From: Albuquerque
For your application...just keep the factory recommended spark plug gap. The gap is .052 - .056 inch per my '03 SD Owners manual. But with mods to the intake...then usually more mods to the ignition anyway. The reason is to have a complete burn. I suppose it all depends on what the final objective is for the V10 in question. 
biz
biz
FTE Leadership Emeritus
Joined: Jul 2002
Posts: 42,561
Likes: 423
From: Long Island USA
The theory with tightening the gap with a blower is that the much denser air impedes the spark. So, you have to tighten the gap to get a consistent spark. Or, upgrade to a higher voltage coil, which is kinda impossible (so far).
Go by the manufacturer's gap, I doubt you've improved your volumetric efficiency enough to require changing your spark plug gap
Go by the manufacturer's gap, I doubt you've improved your volumetric efficiency enough to require changing your spark plug gap
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