<VV> Re: rocker arm ratios

[BobHelt at aol.com]

In a message dated 10/9/05 6:15:33 PM US Mountain Standard Time, 
djtcz at comcast.net writes:

> My April 1962 Chevy Service news covering the Corvair Spyder says the 
> rocker arm ratio is 1.5
> 

Yes, the early model Chev literature does say that the rocker ratio is 1.50. 
But most Late Model literature states a 1.57 ratio. Why the change? Who knows? 
Other Chev data seems to be confused too. How about 1.53?

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