Re: hotter plugs on hopped rebuild

["Programmer" <nwester@eidnet.org>]

If anything, go a range cooler and stick with the stock gap (or .005
smaller). A hotter plug will always erode quicker, can cause detonation--yet
however, fire easier with a wider gap. The ol' thought was wider gaps fire
leaner mixtures--which is true. Under
higher compression, the wider gaps caused more emissions due to
miss-fire...my
personal experience is that colder plugs are better overall. We race with #7
range NGK's in our BBC. Anyone ever pay $35 bucks for a spark plug ?? <g>
Lyndon.
-----Original Message-----
From: lpwcruzr <lpwcruzr@netzero.net>
To: gmecm <gmecm@lists.diy-efi.org>
Date: July 28, 2000 11:40 PM
Subject: hotter plugs on hopped rebuild


>I just had my LO5 TBI350 truck motor rebuilt. It was bored 30 over and now
>has a cam with 204/214 duration, 420/440 lift and separation of 110. The AC
>Delco book list a plug of CR43TS with a gap of .035. I am wondering if
>moving to a CR45TS and widening the gap would be beneficial. .035 seems
>awfully tight for a HEI ignition. Anyone see a problem with the hotter
plug?
>
>Paul Washburn
>lpwcruzr@netzero.net
>
>
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