Bob---Can't argue much with that. We know that the higher rocker ratio furthers
mechanical disadvantage. Seems like a good reason to stay with the stock ratio,
and just get more performance from the camshaft.
Dick
-----Original Message-----
From: Robert Lang
Sent: Thursday, June 19, 2008 12:22 PM
To: Sally or Dick Taylor
Cc: 6pack@autox.team.net
Subject: Re: [6pack] GP2 cam idle characteristics
On Thu, 19 Jun 2008, Sally or Dick Taylor wrote:
> Vance---Why would "higher ratio rockers" require more valve lash?
I'm not Vance - he can speak for himself. But the dudes that make higher
ratio roller rockers warn you to "adjust" your valve lash based on the
rocker-arm ratio. I think it has to do with reducing the shock on the cam
and lifter due to the larger "ramp" load - with a high-ratio rocker, the
cam is actually lifting more (or technically there is more inertial load).
Undoubtedly, someone will find error with my reply, but the Goodparts cam
sheets warn you to adjust base on which rocker setup you have. I am 100%
certain of that as I just read one on Sunday.
> Dick
rml
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Bob Lang NER/SCCA | This space for rent
Solo Chair 2008 TR6 40 F Prepared | Triumph!
Voice:781-438-2568 FAX: 617-258-9535 | Cell: 339-927-4489
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