I believe that they are refering to intake/exhaust valve lash. The
intake valve is staying open longer at 13/1000 lash compared to
16/1000. Joe(B)
----- Original Message -----
From: <N197TR4@cs.com>
To: <GRMTim@aol.com>; <BillB@bnj.com>; <fot@autox.team.net>
Sent: Thursday, August 09, 2001 8:34 PM
Subject: Re: Basic Question...Expected Hp Difference
> Timing 34 to 28: that's interesting...and consistant with another
piece of
> information that I recieved.
>
> But what does 16/16 and 13/16 mean?
>
> Good thread.
>
> joe a
>
>
> > Where a chassis dyno is valuable (and I don't see how any of you
tune
> > without
> > one now a days) is to change things and then compare runs. We
picked up 3-4
> > horsepower just messing with timing. And no, timing it until it
pings and
> > then backing off is not the right answer. We picked up power by
backing
> > timing off from 34 degrees to 28 degrees.
> > Adjusting the valves from 16/16 to 13/16 was worth another two hp!
> >
> > Tim Suddard/GRM
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