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I've got a bit of cam bind in a new cam I'm installing in the GT6. It =
appears to be a combination of slight run-out (i.e., the cam is slightly =
bent, 1/1000 of runout in the middle), journal size right at the factory =
maximum spec, and installed bearing I.D. that is at or below the factory =
minimum I.D.
It's also possible that the block is not bored perfectly straight as the =
binding is not consistent around the rotation, but another cam I have, =
with journal diameters 5/10,000 smaller, turns freely. I have not =
checked that cam for run-out.
Question is, is there a tool to "expand" the bearings into the block and =
possibly gain a bit of clearance? I'm told the factory manual for one =
of those Octagon cars calls for such a tool. I'm using the typical =
Spitfire bearings.
Next stop is a machine shop with a crank straightening machine to see if =
they can use it to straighten a cam.
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<html><head></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I've =
got a bit of cam bind in a new cam I'm installing in the GT6. It =
appears to be a combination of slight run-out (i.e., the cam is slightly =
bent, 1/1000 of runout in the middle), journal size right at the factory =
maximum spec, and installed bearing I.D. that is at or below the factory =
minimum I.D.<div><br></div><div>It's also possible that the block is not =
bored perfectly straight as the binding is not consistent around the =
rotation, but another cam I have, with journal diameters 5/10,000 =
smaller, turns freely. I have not checked that cam for =
run-out.<br><div><br></div><div>Question is, is there a tool to "expand" =
the bearings into the block and possibly gain a bit of clearance? =
I'm told the factory manual for one of those Octagon cars calls =
for such a tool. I'm using the typical Spitfire =
bearings.</div><div><br></div><div>Next stop is a machine shop with a =
crank straightening machine to see if they can use it to straighten a =
cam.</div><div><br></div><div><br></div><div><br></div><div><br></div></di=
v></body></html>=
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
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