Rocker Ratio
Rocker Ratio
Senior User
Joined: Nov 2008
Posts: 276
Likes: 0
From: Nashville NC
Do you know on that year model, what size bolt holds the rocker arm fulcrum down.
If its a 5/16" hole, Crane has a push rod guide & 5/16 to 7/16 stud set you can get to change over to roller rockers.
Dont know how good of quality they are, but theres a set of 1.73 roller rockers on e bay right now for $99.00 Christmas special.
Neil
If its a 5/16" hole, Crane has a push rod guide & 5/16 to 7/16 stud set you can get to change over to roller rockers.
Dont know how good of quality they are, but theres a set of 1.73 roller rockers on e bay right now for $99.00 Christmas special.
Neil
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Senior User
Joined: Aug 2008
Posts: 124
Likes: 0
From: Tuscumbia , Al
Done some searching talked to Melling , Sealed Power , and Pioneer for stock replacements they all told me stock is 1.75 ratio ..... That being said guess they will work not much difference in 1.73 and 1.75 
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Hotshot
Joined: Dec 2003
Posts: 18,423
Likes: 9
From: iowa
actually when you do the real measurements you are likely to find that 1.75 ratio stock style rockers measure out to about 1.65 in reality, even the aftermarket roller rockers that I was playing with came up considerably short. Me and another guy measured actual lift at the valve with various rockers and found a lot of variance between them. example my FRPP rockers ended up at .795 ACTUAL lift when the cam was supposed to be .808, another set I had of cheaper rockers only yielded .780 approx (don't remember the exactly numbers now been a couple years back) Crower stainless were the closest and any of the BBC rockrs were the worst on a BBF (Harland sharp and scorpion were a couple examples of that)
So honestly there probably isn't going to be any difference between a 1.73 and an advertised 1.75. But stock is 1.73 in reality.
So honestly there probably isn't going to be any difference between a 1.73 and an advertised 1.75. But stock is 1.73 in reality.
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