Spark plug question

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11-30-2000, 09:27 AM

theformula

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Spark plug question

I was looking at acdelco.com and noticed that stock plugs, R45TS, have an extended tip. (same plugs from the factory)

The ones I bought today ,R44T, are one level colder and are shorter, WITHOUT an extended tip.
Will this hurt performance?

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'92 Formula
305 TPI 5speed
1LE package
Mods: SLP headers,SLP catback,SLP air foil,ported plenum,Crane AFPR (42psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch, Macewen white face gauges...ZZ9 cam (i still have to install it

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12-04-2000, 12:12 PM

jrr

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Just my personal experience. The further in the plug can reach, the better the combustion from the spark. Unfortunately, long-tip plugs tend to be hotter. Plugs that are too hot create detonation problems or make them worse.

Engines that REALLY respond to a long-tip plugs are...LAWNMOWERS! It's amazing how much better any Briggs & Stratton engine will run if you chuck the J-8 plug and put in a really long-tip plug. My chainsaw runs and idles much better with a longer-tip plug.

[This message has been edited by jrr (edited December 04, 2000).]