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Date: Sun, 15 Aug 2004 23:33:37 +0100
From: Grunff <>
Subject: Re: Wrong Spark plugs?

Fred W. wrote: > While cars with DI are *very* picky about the plugs due to their being used > to sense combustion by the ECU, the more standard coil and dizzy engines > from says of yore are not so sensitive... IME the turbos really are - it can make a difference of several PSI. I believe it's a combination of things. In turbos, plugs have to work across a significantly bigger temperature range than NA engines. They also have to produce a consistent spark under increased pressure - higher pressure requires a higher voltage to initiate spark propagation. -- Grunff

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