There's no compression/volume limit that I'm aware of (unlike in the NMRA Pure Stock class). However, you need to be keen of several factors when milling. Piston to valve clearance could become a problem if too much is removed. Also, you may tend to over-shroud the exhaust valve by milling too much and hence reducing the combustion chamber. Also remember that in T/S we've got to run PUMP gas (no race gas & no additives) so too high of a compression ratio can get you there.
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Jeff Chambers
T/S #4
12.55 Seconds/109.3 MPH
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