New Cam Runout

[rbeeson]

Hey everybody,
I have a new cam and checked the round out. Cam gear end is dead on, middle is 0.00125 out of round, and the flywheel end is about 0.0005 out of round.
Is this enough to bind up during mock up. It doesn't lock up just hard to turn. I took the flywheel end bearing out and torqued it all back and it doesn't bind at all.
Thanks again,
Reese

[Ohio Tom (DdK)]

That runout shouldn't make it hard to turn. Is the thrust tight?

[rbeeson]

That runout shouldn't make it hard to turn. Is the thrust tight?

I actually took off to much on the thrust. It is about .006 to .007 so I have to replace them.

[Ohio Tom (DdK)]

Hmm, still with that runout, still should be easy to turn.
I have seen when cases get old (and pounded out), they will get tight on the cam bores.
I have one in my garage shelf that's just the same. Not sure why I'm keeping it. Otherwise a good case.  It's a sad reason to retire a case, but it does indicate that the case is out of true and may have other plainarity issues.
I think I'll remeber to throw that old case away now..

[Ohio Tom (DdK)]

Oh yeah, if it is cam bore issue, I think Rimco can re-bore it for you.

[rbeeson]

It was the cam journal next to the fly wheel end. I took emory cloth and "polished" the journal and rechecked until plastigage said the bearing to cam clearance was with in specs.
Thanks Tom

[rbeeson]

Oh yea...I also (with dial indicator) marked the high side and low side of the cam runout and then using our press "straightend" the cam to no runout.
Now on to making my lifter/pushrod tool for degreeing the cam. This is my first in depth build and first stroker build...very enjoyable!
 In touch with John @ Aircooled.net to set up my IDA's for E85, shooting for 9.5 to 1 DCR and 200 psi cranking psi.
 Should do a little better than the 'ole 1835cc w/44 IDF's with 8.6 to 1 SCR.

[rbeeson]

I have a .015 dial indicator on the way. I was playing around with the block and cam today and I Emory clothed the flywheel cam bearing journals (Incase I'm not clear, I used Emory cloth on the case halves not the cam or bearing) until the oil clearance between the cam and bearing (using plastigage) is within specs. The cam and crank turn freely in the case now when its torqued down but the cam has NO endplay. With the case haves apart I have .004 endplay for the cam on both halves.
the pulley end bearing and the middle bearing look good but the flywheel end is wearing "shiny" on the inner edge of the bearing. this is just spinning by hand during mock-up (using engine building grease). I put my 1" dial indicator on the flywheel end journal and it is about .001 out of round.
Do I need to send the block and case off to be line bored and cam straightened or is there something I can do here at home?