Message text written by "Andrew H. Litkowiak"
>You're not going to pick up 50% by simply porting and polishing. You'll
need a
cam, probably different valves, mill the head, etc. You're not going to
simply
slap the old bearings back in. Are the original pistons suitable? Maybe,
maybe
not. What about head service?
What other old parts are you not going to take a chance on? The crank needs
to
be inspected and polished, and possibly ground. The block needs service, at
least cleaning and honing. And on and on. One doesn't boost HP by 50% and
slap
the old parts back in. At least not with any expectation of the engine
surviving.
<
You started with a fresh engine (from GM) so keeping the comparison fair
(what's the point in comparing a fresh GM motor to a 25 year old tired TR
motor?) then with porting, manifolds, cam and a compression ration increase
will achieve 150 HP with not much fuss at all. After all the euro spec TR6
motors achieved this from the factory. And the internal parts - pistons,
rods, crank, etc - should be up to the task. Going to 200+ hp (achievable
but not cheap) is another story.
Dave
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