Congratulations for the good work with your 1980. 35+% horsepower
increase, how pleasant.
Although you may be having troubles with the OD clutch, you can do a
few things from under the car that are likely to solve some vexing
problems. WHat I would suggest is to remove the pump, valves, etc, etc,
and replace all the O-rings, the valve balls and seats, then put it back
together. It may be that simple. I had erratic operations on our 72B,
and found all the O-rings to be hard and worn.
Good luck,
Bob
On Thu, 28 Aug 1997 11:13:00 -0700 "White, Richard H."
<White@courier3.aero.org> writes:
>I've returned to the MG list to share / retreve data from fellow MGB
>owners.
>Its been a few years since I signed off, and many things have
>happened.
>
>The 80 MGB, (gutless wonder) now has power, much more power than the
>original
>65 HP. With early model pistons, mild hipo camshaft, and weber
>downdraft
>carb. More than that, slightly ported and polished the head, used an
>early
>model cast exhaust manifold and recurved the mechanical advance in the
>
>distributor. The flywheel was lighted to 15 lbs and engine balanced.
>The
>static compression ratio is about 9.3:1 and doesn't knock on mid-grade
>gas.
>Since the car only had 65 horsepower new, this rebuild really made a
>drastic
>improvement. I want to think that its about 100 to 110 horses per the
>
>"DeskTop Dyno" software package, but dont really know. The book, How
>to
>power tune MGB four cyl engines , by Burgess, was a real help and a
>must
>read book for rubber bumper car owners. (The sister book on Midgets
>is
>worthless) First impression was, Wow, the car actually accelerates
>when you
>push of the gas (at highway speeds).
>
>Now the overdrive transmission is starting to flake out, and I need
>help.
>The clutch shutters when releasing and has done so ever since I
>replaced the
>original clutch (not related to lightened flywheel). The OD unit is
>working
>but only when gas is applied. The unit drops out when coasting
>downhill or
>decelerating. Typically it jumps back and forth, in and out, until
>gas and
>acceleration is resumed. Anyone with ideas?? I measured the hyd
>system
>pressure and found that the needle fluctuated wildly but dont know if
>thats
>normal. The average value of the fluctuation is about 420 psi and
>normal.
>
>Richard White
>80 MGB, Brooklands Green
>
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