Re: the Navarro Six, O-ring questions

[farna@xxxxxxx]

wow! double o-ringed block!! That's unusual, typical 13:1 drag engines only run a single o-ring. Barney was planning on LOTS of cylinder pressure! That or it is just a fail-safe for reliability. remember, drag engines only build high pressure for short burts, Indy cars all day! 

On July 16, 2005 Tom Jennings wrote:

> Nick or Bruce, I assume you guys know O-ringed heads? I've only
> heard of them.  I may have heads that don't match the block... but
> I don't know crap about this stuff.
> 
> The block still has it's O-rings (copper?) in place. I measure
> 4.175" groove diameter, approx. .150" from the combustion chamber
> (that's a guess, I didn't measure that).
> 
> However, the heads are also O-ring'ed, at 4.225" diameter.  That
> means the block and head o-rings sit right next to each other,
> .025" apart center-to-center. I didn't measure the O-ring thickness,
> but it means they probably jam side by side.
> 
> Is this right?


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