simply grinding the head is certainly not enough to get extra power. You should
also consider to replace and to smooth the in/outlets. A *must* is to check
whether the length of your push rods (valves) arenít too long.
I highly recommend to overhaul all bearings in case the engine already ran many
miles. If you only rework the head without doing the bottom, you will soon have
some push rods / crank shaft bearing failure.
Never modify a cylinder head without an engine rebuild unless the engine is
fairly new or just ran 10000 to 15000 miles.
Other than that, a 10:1 CR need higher rated gas, which maybe not a big issue
the US but it is in Europe. Gas is very expensive (tax) here, the high
rated more of cause.
Hope that helps,
Robert J. Carley wrote:
> Can someone tell me whether or not a 10:1 compression head can be put on
> a regular TR6 engine? What are the benefits, and what are the
> complications? Will it increase horsepower, or will other changes have to
> be made to the engine in addition?
> I see these advertised once in a while, and just wonder whether or not it
> is worthwhile to pick one up, perhaps even for future use.
> Mine is a North American 73 TR6.
> Robert Carley
> Ontario, Canada.