[Tigers] Valve train geometry help

[Sandy Ganz]

On some heads the norm is to use the Chevy valves which have a longer stem,
usually means longer pushrods to keep the geometry right. Go through the comp
cam exercise will get you the info you need to properly size the pushrod.
Sandy



----- Original Message ----
From: Tony Somebody <achd73 at yahoo.com>
To: tiger <tigers at autox.team.net>; Alan Zeni <tiger at missiongranite.com>
Sent:
Thursday, September 4, 2008 4:01:52 PM
Subject: Re: [Tigers] Valve train
geometry help

Alan- do you have solid or hydrulic lifters? Also the guy doing
the head work should have taken care to make the valve stems the same length.
Maybe someone knows for sure if the hyd. lifter will allow for the legth. You
have some adjustmet on the roller rockers as well. Good luck, TtT


--- On
Thu, 9/4/08, Alan Zeni <tiger at missiongranite.com> wrote:

> From: Alan Zeni
<tiger at missiongranite.com>
> Subject: [Tigers] Valve train geometry help
> To:
"tiger" <tigers at autox.team.net>
> Date: Thursday, September 4, 2008, 5:49 PM
>
I was wondering if anyone else has run into this issue - I
> had my heads
>
rebuilt and had larger intakes put in.  Late model valves
> were used.  These
> valves have a longer tip above the retainer.  Now, taking
> both
measurements
> from a catalog and micing the two style valves, there seems
>
to be about a .154
> difference in length.  With the 1.6 ratio roller rockers
> that I am using, it
> seems to me that if I take the tip difference and
divide by
> the ratio
> (.09625), I could install pushrods that are .1 shorter
and
> eliminate all of
> the issues with grinding down the tips.  Do my calc's
> sound kosher?
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