<VV> Re: rocker arm ratios

[Kirby Smith]

If I am not misremembering (I last looked at them 20 years ago and I 
don't have any spares handy to check), the rocker arms are slotted where 
they mount to their studs.  Wouldn't this make the differential ratio 
variable over the valve cycle?

kirby


BobHelt at aol.com wrote:
<snip>
> 
> Tests run by several Corvair nuts have shown that all stock rockers had the 
> same ratio, probably 1.57. The only way to know for sure would be to run some 
> tests on several stock engines using TWO dial micrometers, one at the pushrod 
> and one at the valve stem to measure lifts. Then do a calculation.
> Regards,
> Bob Helt