[TR] [6pack] Compression boost

[Robert Lang]

Hi,

Once you get above 9.5:1, you can run regular or mid-grade fuel, but you 
have to watch for pinging and if you get ping, you have to back off the 
timing. Note that the higher the compression ratio, the more critical your 
ignition timing becomes.

Once you go over 9.5:1, you really have to use high octane fuel. Some 
states only have 91 as the premium so that would limit your optimal max. 
compression ratio. For states that can get 93, you might get away with 
10:1, but you need to plan you "trips" to places where you can get fuel of 
you have to tote around bottles of octane boost.

Richard Good has a nice chart of how to have your head milled.

Oh, once you go above 9.5:1, you  have to start thinking about reshaping 
the combustion chambers to reduce possible "hot spots" as those are a def. 
item in promoting pinging in a high compression motor.

In my travels, I have seen streetable TR6's with reported 10:1 motors, but 
I have to hear a motor before I believe the claims of CR. 12:1 motors 
sound way kool. But forget about pump gas.

:-)

rml
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Solo Chair 2008       TR6 40 F Prepared        |  Triumph!
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