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 Post subject: Cam vs. Clearance
PostPosted: Sat Sep 07, 2002 7:40 pm 
For my first performance duece and a quarter slant six, I want to use the Mopar Perf. 284-.528 cam. Using cast pistons with no valve notch, how much can I cut the block and head before the valves start banging the pistons. I'd like to be able to cut a total of .200 off the block and head. If I can't get close to this number, I'll look at a different game plan. Using Mopar's formula, this cam figures to be 241@.050 duration.

ceh52@quik.com


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 Post subject: Re: Cam vs. Clearance
PostPosted: Sun Sep 08, 2002 9:29 pm 
with stock rods and piston pin hight you should be able to go 100 off the head and 100 off the block easy. I ran that combo for years.

Will
Quote:
: For my first performance duece and a quarter
: slant six, I want to use the Mopar Perf.
: 284-.528 cam. Using cast pistons with no
: valve notch, how much can I cut the block
: and head before the valves start banging the
: pistons. I'd like to be able to cut a total
: of .200 off the block and head. If I can't
: get close to this number, I'll look at a
: different game plan. Using Mopar's formula,
: this cam figures to be 241@.050 duration.



slantsix@netzero.net


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 Post subject: Re: Cam vs. Clearance
PostPosted: Mon Sep 09, 2002 11:11 am 
Thanks Will. I'll go ahead and order the cam since I can get the compression I want. When I get it I'll put it in a stock motor to make sure there's .290 clearance (.100 headcut, .100 blockcut, and .090 valve clearance). I didn't want to buy the cam, make the cuts and then find out the valves are too close to hitting. If I can get .100 block and .060 head I'll be happy.

ceh52@quik.com


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 Post subject: Re: Cam vs. Clearance
PostPosted: Tue Sep 10, 2002 5:49 am 
Quote:
: Thanks Will. I'll go ahead and order the cam
: since I can get the compression I want. When
: I get it I'll put it in a stock motor to
: make sure there's .290 clearance (.100
: headcut, .100 blockcut, and .090 valve
: clearance). I didn't want to buy the cam,
: make the cuts and then find out the valves
: are too close to hitting. If I can get .100
: block and .060 head I'll be happy.


You should have no trouble with that combo.

Happy building,

Lou


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