[Supras] Colder plugs, when do yall use them?

[Walker, Brian (Rich. Dist)]

I was thinking 7 was the stock range but the 2330's are BCP6RE, is the 6
designation not the heat range? Also, I've noticed I get some plugs
(NGK) that have a silver base and some are gold (cadmium?) I try to
match them, just wondering if anyone else noticed that?

Anyone else have the number written near the phone so you can call and
see who has them in stock?
Brian


Date: Thu, 14 Jun 2007 09:38:44 -0500
From: "Chris Smyczek" <csmyczek at molbiores.com>
Subject: Re: [Supras] Colder plugs, when do yall use them?
To: <supras at supras.com>
Message-ID: <000a01c7ae91$b623f810$0800a8c0 at JOE>
Content-Type: text/plain;	charset="us-ascii"

Cold plugs transfer more heat. Increased boost creates increased heat
generally. A lower heat range, ngk 6, will start to glow like a glow
plug and lead to preignition under certain conditions. Using a plug
which is too cold, ngk 10 heat range for example is safe but may end up
fouling. If you are racing, the engine is not run enough at low rpms to
foul plugs which otherwise may be too cold (on the street). Chris