Dan has queried:
> Ok, i confess. This shadetree mechanic is DYING to
> know what the #%!! a jackshaft is!?!
It's a camshaft with no lobes :-)
The 2000 engine is really just a stroked 1600 with an overhead
cam. Stroking is easy: change the crank, conn rods and pistons.
That overhead cam was a bit harder to fit in, but Nissan managed
to do it without any major redesign: replace the camshaft with a
jackshaft - use the same gears and chain setup as is in the 1600.
The distributor and fuel pump get driven by it.
Now, add a second gear on the jackshaft, and run a long chain
up to the real camshaft mounted in the head. Presto - OHC engine
out of a pushrod design. Clever (kinda), cheap ('til the chain breaks),
and 39 more horsepower.
My apologies to everyone that already knew this..
-- John
John F Sandhoff sandhoff@csus.edu Sacramento, CA
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