[DeTomaso] WARNING: .050 may be the wrong kind of Bomb

[Julian Kift]

The plug electrode damage may be self destruction due to heat/detonation. Too hot a plug in some cases will create detonation, especially if you are on the verge of being there anyway. FWIW I run the Autolite AR-32 plug, which as I undestand it is one of the colder plugs Autolite manufacture. 

 

Julian
> From: dfcex at pacbell.net
> To: rimov at charter.net
> Date: Sun, 24 May 2009 08:14:11 -0700
> CC: detomaso at realbig.com
> Subject: Re: [DeTomaso] WARNING: .050 may be the wrong kind of Bomb
> 
> Paul, very high dome pistons.
> This is why I had to go with large cc heads, to keep the compression around 
> 10.5:1.
> The valves are brand new Ferera's, not cheap.
> But I'm not sure the damage to the plugs was caused by contact. On #6 the 
> tip is still intact, yet the electrode is eroded aprox. 1/4" below / inside 
> the threaded case. On #5 the tip is 1/2 intact, and the electrode is about 
> 1/3" down. I don't see how the electrode could have been impacted while 
> being "blocked" by the tip. The tips don't look bent, either.
> If the bits and pieces are already gone, I'll proceed to check the 
> compression and leak-down.
> Assuming it checks out I'll add a couple more rings and go with .045, then 
> take it to the Dyno Shop to check the advance, etc. I was thinking about 
> having it dynod anyway.
> 
> Dan
> Dan F. Courtney
> 
> La Jolla, CA
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