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#5 Re: what is the ratio of a series standard rockers?
Dodgeman Posted on: 2010/3/22 13:56
When I bought my roller rockers I spoke with someone at Yella terra who insisted that the roller rocker ratio was in fact 1.54 to 1 & that the standard rocker ratio was 1.44 to 1.

If the factory published literature says 1.42 for stockers then I would go with that & if the roller ratio is really 1.54 instead of 1.55 then I guarantee that your engine will never know the difference.


#4 Re: what is the ratio of a series standard rockers?
benny Posted on: 2010/3/22 12:14
Just had a quick look in my Nissan factory "Service Manual - Model A10 and A12 Engine" issued 1st Mar 1970.

It lists the rocker arm ratio is 1.42:1

As for the YellaTerra rockers. I have seen them in 1.55 & 1.65:1 ratio, not sure if the later are available anymore though


#3 Re: what is the ratio of a series standard rockers?
Dundee1000 Posted on: 2010/3/22 12:03
i heard mentioned the stockies are 1.45..


#2 Re: what is the ratio of a series standard rockers?
clyons8 Posted on: 2010/3/22 11:54
Spot-on I reckon?


#1 what is the ratio of a series standard rockers?
woody Posted on: 2010/3/22 11:41
hey guys just after the ratio of a series standard rockers. As i have a set of yella terra 1.55 ratio rockers and just need 2 know if it is the same






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