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need stock rocker arm ratio for 504.


 
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1070rocker
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PostPosted: Fri Oct 25, 2013 6:30 pm    Post subject: need stock rocker arm ratio for 504. Reply to specific post Reply with quote

Could anyone tell me the stock rocker arm ratio for a 504 case engine? I think it is 1.5, need to make sure. Thanks engine is from a 2290.
 
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John Saeli
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Joined: 19 Dec 2009
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PostPosted: Sat Oct 26, 2013 2:17 pm    Post subject: Re: need stock rocker arm ratio for 504. Reply to specific post Reply with quote

They say the only stupid question is the 1 not asked, so here goes,; What is "Rocker Arm Ratio"?
 
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desert eagle
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PostPosted: Sat Oct 26, 2013 2:53 pm    Post subject: Re: need stock rocker arm ratio for 504. Reply to specific post Reply with quote

I have a 930 with a 504 out of a 1370 with 2290 heads for the better injectors anyway yes they are 1.5 ratio and you can buy 1.6 roller rockers from a place called Murphy's for 700.00
 
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chuck machinist
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Joined: 05 Jul 2011
Posts: 1130
Location: Chesapeake va

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PostPosted: Sat Oct 26, 2013 3:39 pm    Post subject: Re: need stock rocker arm ratio for 504. Reply to specific post Reply with quote

I believe John that it has to do with how far you sit back in a rocking chair , and then the number of times you rock it before your cat"s tail gets caught in it! My 2 cents worth.
 
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Ken in AZ
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PostPosted: Sat Oct 26, 2013 4:08 pm    Post subject: Re: need stock rocker arm ratio for 504. Reply to specific post Reply with quote

John,

a 1.5:1 ratio refers to how much the valve moves for the amount the lifter moves. Lifter moves up say half an inch and the valve moves 1.5 times that, for example. At least that's how I remember it.

Hope this helps.

Ken in AZ
 
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santa clause
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PostPosted: Mon Oct 28, 2013 2:59 pm    Post subject: Re: need stock rocker arm ratio for 504. Reply to specific post Reply with quote

I thought the rocker ratio was 1.42 in and 1.43 ex that whatn I alwas have been told
 
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