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
>
> =====
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