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401 Roller Motor Update
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SKeown View Drop Down
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Joined: Jul/30/2009
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Points: 3085 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SKeown Quote  Post ReplyReply Direct Link To This Post Posted: Aug/07/2012 at 9:03pm
 
 I used the same length with both Johnson and crane lifters, when using shaft rockers there's not much room for variation either.
 
 SKeown
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Ontario Automotive View Drop Down
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Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ontario Automotive Quote  Post ReplyReply Direct Link To This Post Posted: Aug/08/2012 at 1:10pm
we used crane pushrods and chevy big block roller lifters we straightened the strap out that holds the lifters together and they fit perfectly
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Points: 5122 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Rebel Machine Quote  Post ReplyReply Direct Link To This Post Posted: Aug/08/2012 at 7:56pm

Lifter bores measure okay, about 0.905" with some around 0.9053".

Machine shop phoned several places including Comp Cams. They said they make them 0.903" in diameter even though they advertise 0.904. They don't think the diameter is the problem.

I'm going to order a flat tappet cam like the one that was in it so I can make Cordova. We'll figure out all this roller cam stuff later.

-Steve-
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SKeown View Drop Down
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Points: 3085 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SKeown Quote  Post ReplyReply Direct Link To This Post Posted: Aug/08/2012 at 10:48pm
 
 "They don't think the diameter is the problem". 
 
 Could it be because their's are too small? I can tell you definitely that it matters. Bushed lifter bores incteased my oil pressure 10 psi across the board and eliminated the fluctuation too.
 
 SKeown
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