<VV> Re: rocker arm ratios
kirbyasmith at gwi.net
Mon Oct 17 16:27:26 EDT 2005
BobHelt at aol.com wrote:
> In a message dated 10/17/05 10:33:54 AM US Mountain Standard Time,
> kirbyasmith at gwi.net writes:
>>the rocker arms are slotted where
>>they mount to their studs. Wouldn't this make the differential ratio
>>variable over the valve cycle?
> Hi Kirby,
> Well, while I agree with the slight change in ratio at the tip, during a
> rocker cycle (due to the rocker sliding over the valve tip), I can't agree that
> there would be any change due to the slots. Wear patterns on worn engines show
> that the rocker pivots right on the ball without sliding in the slot. Thus, if
> I understand your question, I'd say no.
> Also as I referenced making a rocker measurement with two dial mikes, I don't
> see that your question changes that suggestion.
> Bob Helt
Thanks for the clarification Bob. I was not disagreeing with your
suggestion, I was thinking that the two mikes' measurements would have
to be interpreted differentially if the slot were moving (in
translation) relative to the stud.
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