After
several hurdles, we were finally able to get
some numbers out of our 400
Horsepower 302 project engine.
As we mentioned in the January issue, the
engine was placed into our 1967 Mustang coupe,
which we enthusiastically titled "Project
11.99". Our first hurdle came when
we fired up the engine and, although it ran
great, it had lower than desired oil pressure.
We attributed the problem to the standard
volume pump combined with our race-oriented
bearing clearances. We talked to Melling and
on their advice swapped over to a high volume
(M68HV) pump. This did the trick, and our
pressures were now 40 psi at hot idle and
75 psi at 6000+ rpm, using Royal Purple 5W30
race oil. With that figured out, we put a
couple hundred miles on the engine to ensure
the rings were seated and to break in the
Centerforce clutch. Finally on January 8th
we headed out to Sacramento Raceway to make
some passes.
The plan was to make a couple easy shakedown
runs before really hammering the clutch and
engine. We rolled into the waterbox did a
small burnout to clean off the Mickey Thompson
ET Streets, and then launched the car at 2000
rpms. The tires spun quite a bit off the line,
resulting in having to short shift into second
at about 6000 rpm. Second gear was taken to
about 6300 rpm before hitting third. That
is when the problems started. Third gear seemed
to feel odd, as if the rpms were climbing
faster than the car was actually accelerating.
The shift into fourth told the rest of the
story; the shifter would not go into fourth,
indicating a clutch or transmission problem.
After coasting the car back to the pits, we
got underneath, hoping for just a linkage
problem. Instead we could visibly see shreds
of clutch friction material wedged in between
the engine plate and bellhousing.
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