On my race car, after shaving the heads and installing 1.7:1 rockers
on the intakes, I started pushing pushrods through the rocker arms. I
opted for lash caps, caps that fit over the top of the valve stem to
help restore the geometry. They stopped the carnage. I'm not sure if
they would be cheaper than custom pushrods though.
Kirk Hillman wrote:
>
> Alan,
> Shorter or longer pushrods in these scenarios will affect rocker
> geometry. If you talk to Roland at ACR he would likely say that it wouldn't
> matter that much. However, if you talked to Mr. Turner there is some
> imminent engine failure due you in 10,000 miles.
> What it does is move the contact point on the rocker closer or farther
> away from the tip. Also, side loading becomes an issue with the related
> extra wear on the valvetrain. This is one of the reasons a high lift cam is
> less long lived than a standard one. For my money I would worry too much
> about it (though I have no real experience... just listened in on people who
> should know.)
>
> Kirk
>
> ----- Original Message -----
> From: "Alan J. Richer" <mrchurchill109@yahoo.com>
> To: <lro@koan.team.net>
> Sent: Tuesday, January 14, 2003 7:25 AM
> Subject: RE: [lro] 2.25 pushrods and milling heads etc.
>
> >
> > Chalk this up to a dumb Yankee engineer, but it seems to me
> > that from 7:1 > 8:1 and 8:1 > 9:1 that the longer and
> > shorter stock pushrods should work, no? After all, we are
> > only altering the head height .1 inches in either instance.
> >
> > I've used 7:1 pushrods on an 8:1 head....worst case just
> > use two gaskets on the valve cover or a thicker gasket to
> > space things out a bit?
> >
> > Or am I missing something basic here?
> >
> > ajr
> >
> > =====
> > The journey is the destination. Anything else is illusion.
> >
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-- Jim Hall 1966 88" Elephant Chaser http://webs.purplemountain.net/jimfoo/Foospage.htm "You know, I never really damaged my Rover 'till I started wheeling with Jim." Mitch Stockdale _______________________________________________ LRO mailing list LRO@land-rover.team.net http://land-rover.team.net/mailman/listinfo/lro
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