Iâ??m building a new motor for Peyote from the bits of itâ??s previous engine.
I discovered the front main bearing cap was cracked in half when I decided to
freshen the motor. Iâ??ll work on replacing the cap laterâ??maybe get a billet
one made, but in the meantime Iâ??ve run into a minor problem. I donâ??t know
for sure what cam I have or how it should be set. Tony Garmey says itâ??s a
BFE cam, but I canâ??t find any specs for those and canâ??t get ahold of Ken.
I ballparked where I think the cam might want to be and got this for
measurements:
Reading the Intake and exhaust valve movement from the spring retainers I use
0.033â?? as the open/close height which is .050/1.45 which as I recall is the
ratio of the stock rockersâ??
Intake open .033 @ 36 BTC
Intaake close .033â?? @ 76 ABC
Exhaust open .033â?? @ 76 ABC
Exhaust close .033â?? @ 42 ATC
By my calculations that gives:
Intake duration 292.0 degrees
Exhaust duration 298 degrees
Intake lobe center 110.0 ATC
Exhaust lobe center 107 BTC
Overlap 78
Lobe separation angle 108.5
Pretty sure this isnâ??t exactly where it needs to be. I have a vernier
sprocket so I can adjust the timing precisely. My questions are:
What cam is this?
Where should it be set?
How much advance?
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