How will this run? 1995 Road King

[bill57]

1340 .030"+                                 
Crane 310 Fireball cam
OEM cast pistons
.030" head gasket
.020" base gasket
83cc stock heads
squish calculates at .032"
elevation 1050'

8.57:1 static
7.91:1 corrected
151.8 cold cranking compression

Thanks,
Bill

[Ohio HD]

That cam needs more compression to work well.

[bill57]

Thanks Ohio HD
I guess the question is would it be less expensive and or better with buying different pistons or milling the heads? If I got the heads to 75cc I would have this:

9.3:1 static
8.58:1 corrected
168.7 cold cranking compression

Do you know the cc decrease per thousands of an inch taken off of these heads? If I went with the milling would I still be able to use stock pushrods?  What pistons if I should go that route? I will be buyig a S&S Super E to put n her also, if that matters any.

I will be riding alot of two up and some distance riding.

Bill

[Ohio HD]

If I were planning to use that cam, and the heads are to be stock, I would use Wiseco 10:1 pistons, stock head gasket. Another option, since it doesn't sound like you're try to make a road burner, rather a decent running daily use bike, look at the Crane 300 Fireball. It'll work ok with stock head and the 0.030 head gasket. Adjustable push rods makes life easier later if you have to get in there cam chest for anything. I would also use a new Torrington cam bearing, and would look at new lifters too, assuming a '5 has a decent amount of miles on it.

Added: If memory serves, about 0.006 to 0.007 gives you 1 cc on milling an Evo head.

Added more: I strongly recommend CCing heads before, during and after milling to know where you are going, if that's the route you take.

[Ohio HD]

Hold on!

I just looked at the old EVo spreadsheet that I was using cam values from, apparently he the info for the 310 is wrong, or Crane changed it. Looking at a Crane catalog, the 310 should work pretty well at the 9.3:1 you spoke of. 10:1 might be a bit high based on the data in the catalog, not my spreadsheet.

Old spreadsheet info
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Old Crane catalog
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[bill57]

Thanks Ohio.