[6pack] [TR] TR6 Cylinder Head

[Dave]

I'm running 10.5+ with absolutely no problems.  of course, that requires 
premium


-----Original Message----- 
From: glemon at neb.rr.com
Sent: Thursday, September 05, 2013 10:01 PM
To: triumphs at autox.team.net ; Jonas Payne
Subject: Re: [TR] TR6 Cylinder Head

You would get the most bang for the buck from shaving the head 9.5/1 is 
usually considered a safe CR for a street car. A machine shop guy told