[TR] TR-6 Cam

[Randall]

> Before
> installing the new cam, I dial-indicated the lifts for each lobe and
> was surprised that they are only 0.213". Is this the actual
> specification for a stock cam?

That appears to be correct for the early 'emissions' cam, which is the
mildest of all the stock TR6 cams.  I have no experience, but I would guess
that you could go to an early PI cam or perhaps the GoodParts GP2 with no
other changes, to get some significant extra oomph without sacrificing too
much drivability.

While it's apart, you might want to consider raising the compression ratio a
bit.  Milling the head is usually a simple, inexpensive operation that
doesn't require any other changes, and it is practically the only
performance enhancement that works by actually improving the efficiency of
the engine (meaning you'll get better gas mileage too).  Others will have
more experience with the 73 TR6 motor in particular, but generally around
9:1 will still run on regular pump gas and provide significant extra
mid-range torque (where it's the most useful on the street) even if it
doesn't do that much for peak power.

-- Randall