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Pugdog1 New Member

Joined: 11 Dec 2008 Posts: 16
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Posted: Sat Oct 31, 2009 6:24 am Post subject: Mopar 440, how to increase rocker ratio |
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Good morning Mopar Experts
I am not very experienced with the mopar 440's. Can the rocker arm ratio be increased by simply swapping rocker arms, as in a small block chevy?
Thanks
Dan _________________ "Ignorance is a powerful tool if applied at the right time, even usually surpassing knowledge."
E.J. Potter, The Michigan Madman |
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panic Expert


Joined: 11 Dec 2004 Posts: 837 Location: Ecbatana
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Posted: Sat Oct 31, 2009 8:24 am Post subject: |
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By "swap", if you mean is there another rocker that fits? No, but many manufacturers make 1.6 rockers for the B/RB.
If the cam is stock/small/mild you can use both, but if the cam is already working use the intakes only 1st. |
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andyf Expert

Joined: 05 Oct 2004 Posts: 558 Location: Oregon
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Posted: Sat Oct 31, 2009 10:31 am Post subject: |
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Shaft rockers are available from most everyone for the BB Mopar in ratios of 1.50, 1.60 and 1.70.
Once you step up to the good stuff like Jesel rocker arms then you can go as high as 1.85 ratio on standard BB Mopar heads. Some of the aftermarket BB Mopar heads will support up to 2.0 ratio rocker arms.
This picture shows 1.85 intakes and 1.70 exhaust rocker arms from Jesel on a 505 inch BB Mopar running Indy EZ heads.
 _________________ Andy F.
AR Engineering |
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Pugdog1 New Member

Joined: 11 Dec 2008 Posts: 16
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Posted: Sat Nov 07, 2009 9:07 am Post subject: Thanks guys |
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We are building a mild 440 and I was just curious. Don't want to spend the money on this high dollar stuff and will probably go with the stock set-up.
By the way Andy, I am fixing to order a copy of your book.
Dan _________________ "Ignorance is a powerful tool if applied at the right time, even usually surpassing knowledge."
E.J. Potter, The Michigan Madman |
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andyf Expert

Joined: 05 Oct 2004 Posts: 558 Location: Oregon
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Posted: Sat Nov 07, 2009 10:38 am Post subject: |
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If you're new to Mopars then I'd recommend spending some time on the Mancini Racing website as well as the Hughes Engines site. Between the two of them you'll find most everything you need. If you're on the west coast then Bob Mazzolini Racing is also a good resource. _________________ Andy F.
AR Engineering |
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Pugdog1 New Member

Joined: 11 Dec 2008 Posts: 16
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Posted: Sun Nov 15, 2009 8:11 pm Post subject: Thanks andyf |
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Thanks andyf _________________ "Ignorance is a powerful tool if applied at the right time, even usually surpassing knowledge."
E.J. Potter, The Michigan Madman |
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