[6pack] GP2 cam idle characteristics

[Sally or Dick Taylor]

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 at 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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