High ratio roller rockers, for Aluminum heads

Posted By John Mummert 11 Years Ago

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High ratio roller rockers, for Aluminum heads

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John Mummert	Posted 11 Years Ago
Supercharged Group: Forum Members Last Active: 3 Months Ago Posts: 911, Visits: 7.4K	One of the things we changed about the aluminum head was to move the rocker stand bolt closest to the intake manifold farther from the existing lower row.That left room to move the rocker shaft father from the valve making rocker ratios above 1.60:1 possible. This new rocker is longer from the roller to the shaft so it can't be used on factory heads.We just got our first set of samples of the new rockers Modern 1.70:1 rocker ratio similar to all Ford V8 engines (except SBF) since 1958 With so many of the popular cam grinds being low lift designs this will put nearly all of them in the .450-.500" lift range. Price has still to be determined. http://ford-y-block.com 20 miles east of San Diego, 20 miles north of Mexico
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High ratio roller rockers, for Aluminum heads By John Mummert ( 11 Years Ago )

Darn John are you following in the steps of Edelbrock? Of course I... By MoonShadow ( 11 Years Ago )

Chuck, yeah I still have a few ideas in the works. Finding a good... By John Mummert ( 11 Years Ago )

[quote][b]John Mummert (4/5/2013)[/b][hr] Finding a good foundry that... By pegleg ( 11 Years Ago )

Frank, is there some "I told you so" in that comment? By John Mummert ( 11 Years Ago )

Naw! I'm sure you told me that! I'm really glad you found a reliable... By pegleg ( 11 Years Ago )

Put our new rockers to the test this weekend and was really happy with... By John Mummert ( 11 Years Ago )

Investment casting ? By pegleg ( 11 Years Ago )

Frank, the rockers are 2024 billet aluminum, all CNC machined.The 1.7... By John Mummert ( 11 Years Ago )

Very pretty. Too bad i can't convince the tech inspectors at the Pure... By pegleg ( 11 Years Ago )

Paint the heads Frank, They'll never know the difference and I won't... By speedpro56 ( 11 Years Ago )

Gary, I expect those rocker arms would give the game away! By pegleg ( 11 Years Ago )

Speaking of rocker covers. John; Did you have to make any valve cover... By marvh ( 11 Years Ago )

Frank Frank!! you have to keep a straight face:rolleyes:at all times. By speedpro56 ( 11 Years Ago )

Considering that no respectable speed equipment house would EVER have... By MoonShadow ( 11 Years Ago )

What, do they make you remove your valve covers? By charliemccraney ( 11 Years Ago )

Frank, these rockers are actually factory items. My uncle worked at... By John Mummert ( 11 Years Ago )

You see Frank, we're with you all the way in using these factory... By speedpro56 ( 11 Years Ago )

So if Frank buys a set of these rockers, and if I decide to again race... By Hoosier Hurricane ( 11 Years Ago )

And he has no idea how "correct" you car is John. :Whistling: Chuck By MoonShadow ( 11 Years Ago )

John's right about Bobby-boo. He's definitely an Indian Freak. But,... By pegleg ( 11 Years Ago )

Frank: Your remark about the 4 spd 57 Ch-v-s, reminds me that was one... By PF Arcand ( 11 Years Ago )

You got it Paul. Don't forget the Sedan Deliveries with 4 speed... By pegleg ( 11 Years Ago )

Back to the rockers, as you move the ratio higher the shaft gets... By Y block Billy ( 11 Years Ago )

[quote][b]Y block Billy (5/13/2013)[/b][hr]Back to the rockers, as you... By Ted ( 11 Years Ago )

Hi Ted, I'm sure that what you just said is correct, but I'm... By NoShortcuts ( 11 Years Ago )

[quote][b]NoShortcuts (5/13/2013)[/b][hr]Hi Ted, ... Is there any... By Ted ( 11 Years Ago )

Frank and Ted, Thanks for the information. Truth be told I'm still... By NoShortcuts ( 11 Years Ago )

If the spring is 200 lbs. at a given point, the pressure on the lifter... By pegleg ( 11 Years Ago )

One thing that should be added to the good info given is that the... By John Mummert ( 11 Years Ago )

John . Thanks for elaborating further on the additional forces... By Ted ( 11 Years Ago )

No, it's no good because I now have more questions :P Wouldn't the... By charliemccraney ( 11 Years Ago )

Charlie, The larger base circle will allow a larger contact area with... By pegleg ( 11 Years Ago )

I understand how it is being represented. By nature, I'm trying to... By charliemccraney ( 11 Years Ago )

Charlie a larger radius has more contact area than a smaller radius I... By John Mummert ( 11 Years Ago )

I guess I'll have to accept that "a larger radius has a larger contact... By charliemccraney ( 11 Years Ago )

Charlie, you're right, but the flatter or larger radius does carry oil... By pegleg ( 11 Years Ago )

Charlie mechanical engineers use Hertzian Stress calculation for... By John Mummert ( 11 Years Ago )

I always assumed that the reason lifters had a concave face, was to... By Glen Henderson ( 11 Years Ago )

Thank you, that is awesome. I realize what the simplicity of my... By charliemccraney ( 11 Years Ago )

Charlie, and THAT'S why when I visit John, I sit and listen.... By pegleg ( 11 Years Ago )

Having a larger base circle and higher rocker ratio creates a stronger... By CK and his 55Tbird ( 10 Years Ago )

Spring type clothespins do a good job of holding the lifters up for a... By Hoosier Hurricane ( 10 Years Ago )

[quote][b]CK and his 55Tbird (3/4/2014)[/b][hr]Having a larger base... By aussiebill ( 10 Years Ago )

The service manual shows the wooden clothes pins that John is... By Ted ( 10 Years Ago )

And here’s the link to the thread showing a picture of the... By Ted ( 10 Years Ago )

wooden clothes pins aren't exactly that common anymore either! :)... By bird55 ( 10 Years Ago )

Alan: You're right. My wife still uses the solar clothes dryer in... By Hoosier Hurricane ( 10 Years Ago )

John, my wife could supply the Canadian market if your wife wants to... By lyonroad ( 10 Years Ago )

But that's what Hot Rodding is all about. Finding something close to... By CK and his 55Tbird ( 10 Years Ago )

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