spark plug index washers

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Jun 8, 2011 | 02:16 PM

XParatrooper

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spark plug index washers

Hello, has anyone used spark plug index washers, or just indexed the plug so that the opening of the plug is turned toward the ports ? thanks for the help

Jun 8, 2011 | 02:19 PM

fat daddy

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From: Florida

I did it on my street rod use the washers

Jun 8, 2011 | 02:23 PM

hobobiker

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From: Somewhere, PA

I've done this on performance builds over the years, but I haven't really found much value in doing it for street use...

Jun 8, 2011 | 02:29 PM

slothy

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From: Michigan

i understand the reason/concept for them, but is it even noticeable?

Jun 8, 2011 | 03:52 PM

fabrik8r

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From: earth

Even if you can't feel it on the butt dyno, indexing will make a slight power improvement. You will at least gain the benefit of the incomming air/fuel charge constantly washing the plug gap area, keeping them cleaner longer, providing your engine a stronger more consistient spark over the life of the plugs. I place plug indexing in the category of sound routine maintenance practices, I don't always have to gain 10 HP to justify doing something beneficial. It's a pretty cheap mod that only takes a couple minutes, the effort is worth it to me.

Jun 8, 2011 | 07:27 PM

speakerfritz

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From: NYC

putting your piston ring spacing 120 degrees apart will give you max compression....of course....the ring gaps move after a few hours of use...so don't expect the result to last long.

Jun 8, 2011 | 08:23 PM

fabrik8r

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From: earth

Quote:

Originally Posted by speakerfritz

putting your piston ring spacing 120 degrees apart will give you max compression....of course....the ring gaps move after a few hours of use...so don't expect the result to last long.

I think we have an apples and oranges situation here, while ring gaps may move, spark plug gaps do not.