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[Fot] quench clearance

Subject: [Fot] quench clearance
From: rick.parent at att.net (Rick Parent)
Date: Tue, 31 Jul 2018 22:42:32 +0000 (UTC)
References: <4AE9A4DF-91E6-463A-8E4C-D582D27DF40D@dcphotos.com> <164ec83b593-c8c-13f72@webjas-vac232.srv.aolmail.net> <B238857F-E529-4189-BB81-F3A8E3FC56B0@mhc-law.com>
.035 is fine with the stock gasket. 

    On Monday, July 30, 2018 6:08 PM, John H. Hasty via Fot <fot at 
autox.team.net> wrote:
 

 Not apples to apples, but just for info. We used a squash of .020, no gasket, 
O ring, & turned 13 to 14 rpm with our 2 stroke 250cc motors. Cannot remember 
the cc?s for the heads. But it took many, many hours with 400 wet paper, WD40 & 
a surface plate to achieve the desired combo.

Sent from my iPhone
On Jul 30, 2018, at 4:56 PM, fubog1 via Fot <fot at autox.team.net> wrote:


If you have good race rods and all of the clearances are to spec, you could pop 
it up a few thou but I wouldn't go any less than .030.Yes you can run it a 
little tighter but that's the point where there won't be any carbon buildup on 
top of the piston, and all it takes is a missed-shift to turn it into junk.
Considering that the gasket may compress a few thou, depending on what gasket 
you're using, you'll likely be fine with 0-deck, as you're planning.Glen


-----Original Message-----
From: don--- via Fot <fot at autox.team.net>
To: fot <fot at autox.team.net>
Sent: Sun, Jul 29, 2018 7:27 pm
Subject: [Fot] quench clearance

Amici,?
Building a small journal 1296cc Spitfire.Running Venolia?s over Carrillosbeen 
know to go to 8500K rpm (occasionally).
Going to have the block/pistons decked to zero. (can someone tell me a better 
way to say this?)Anyway, I realized that my quench clearance would be the crush 
thickness of the head gasket..035 ~.0385In the Comp Prep manual it states .025 
as plenty of gap.?

Just want to see what y?all say.Thanks,?Don

DON COUCH PHOTOGRAPHY
www.dcphotos.com
(512)-680-3540
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Archive: http://www.team.net/pipermail/fot



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