True enough!! and good point!!!!
but according to (I think this is wear I read it) Kammer and Kammer the
total valve lift a magnum engine can handle is .512 (or maybe .518) and
with the 1.7s Ill be right at .5, so I should be safe. I think that .2"
seems a little big cuase if your stretch steel .2" it wont go back, so you
would be out side the elastic limit. So it has to be less.
Clay
84 Dodge Ram, scrapin pavement w/ 440 8bbl
96 Indy Ram, scrapin EVERYTHING w/ 360 Magnum!' -(www.indyram.org)
69 Road Runner 440 6bbl, project car
http://expert.cc.purdue.edu/~cooke
On Tue, 29 Feb 2000, Mike Schwall wrote:
> At 07:02 PM 2/29/2000 , you wrote:
>
> >Ok everyone, with the new light on the roller rocker buy I have a
> >question.... I am going to install a crane cam in my in 5.9 Magnum in two
> >weeks, over my spring break, now the question remains, can I run my new
> >cam with 1.7 rockers with no problems? Or should I wait and let the cam
> >get broken in on the factory ones before I put the 1.7s on??
> >
> >Thanks!
> >
> >Clay
>
>
> Clay the pistons Clay! Go to the local hobby shop and get a pound of
> modeling clay. Take a head off. Put a wad of clay on a piston that's high
> in the bore. Make the clay 3/8" thick, and make sure it will get under
> both valves. Slap the head on (torque the bolts down), turn the engine over
> by hand a couple times. Take the head off, get a razor knife, cut off the
> material around the valve imprints (*important* don't disturb the clay
> where the valve imprinted it) Get a caliper, measure the thickness of the
> clay where the valves hit. I believe the optimum clearance between valves
> and the piston is like .200". That's off the top of my head, my books are
> still in San Antonio. I'm sure someone could look it up. After that, it's
> just math. Add the current cam lift plus the current rocker lift. Add the
> new cam lift with the 1.7:1 rocker lift. Subtract. If you still have
> .200" (or whatever the safety limit really is) your in luck, if not, how
> much different?
>
> Mike
>
> __________________________
> mschwall@flash.net
>
>
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