I rebuilt my TR6 motor back in 1988 or so... it's got roughly 30,000 miles
on the rebuild now. I wonder if I could appeal to the Triumphlist Gods to
give me your collective, intuitive, scientific wild-ass GUESS at how much
power a person should expect to gain from doing the things I did to the
motor. I suppose the biggest influence on power is going to come from the
camshaft selection. I used a reground cam from Delta Camshaft that is
supposed to be EXTREMELY mild and basically a "torque improvement" cam.
Unfortunately, I cannot locate the specs for the cam... I knew them by
heart at one point!! (Actually, I DO remember that it calls for a valve
lash of .014"... but that's all I remember!)
Other engine stuff: .040" over pistons (A/E), balanced crank, rods,
pistons, flywheel, clutch, high performance valve springs, all new valves,
stock valve seat angles (no trick valve seat mods), stock pushrods, head
milled to 9.5:1 compression, ports matched to manifold/header, ingition
system is Allison, with an Allison sport coil.
That is all the relevent stuff I can think of. So, the question is
(ridiculous a question as it is) if the stock engine made around 105 bhp
and 133 ft. lbs of torque (or whatever!) then how much power and torque
might the above parts and machine work yeild? 110 bph? 120? How much
difference does that stuff really make? Barely noticeable without a dyno
test? Significant? Impossible even to GUESS at because of all the
variables or lack of specs on the cam?
My own Seat-Of-The-Pants dyno test demonstrates to me that the horsepower
gain was minimal, if there even WAS a gain. This has been a slight
dissapointment to me, although I don't require a HUGE amount of bhp.
Thanks for your input.
Pete Chadwell
1973 TR6
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