Roller rocker ratio

greg fulk · 11-24-2011, 11:52 PM

So if I read the rule right I can put 1.70 arms on the 230 6cyl instead of "factory" 1.75? (Harland Sharpe makes a 1.7 for the 230.....the factory arms that are on the car are anywhere from .354 to .382 lift .388 is spec)

Adger Smith · 11-25-2011, 04:16 AM

This no rocker ratio listed has just opened a can of worms. When you just have a lift rule there are all sorts of ways to design the cam and rocker ratio to get the job done. Talk about different lobe designs. One thing I would not do is use a rocker that had it's actual ratio or any ratio stamped on it. Ask Jeff teuton about that!!

Reed Granrt · 11-25-2011, 03:02 PM

Quote:

Originally Posted by Adger Smith

This no rocker ratio listed has just opened a can of worms. When you just have a lift rule there are all sorts of ways to design the cam and rocker ratio to get the job done. Talk about different lobe designs. One thing I would not do is use a rocker that had it's actual ratio or any ratio stamped on it. Ask Jeff teuton about that!!

NoNoNo Adger, You missed the point. Have the rockers stamped with the ratio you want on it. They will not know how to measure to see what it really is.
reed

Jason · 11-27-2011, 11:39 AM

Quote:

Originally Posted by Reed Granrt

NoNoNo Adger, You missed the point. Have the rockers stamped with the ratio you want on it. They will not know how to measure to see what it really is.
reed

Is that so? I would think a techman knows to measure the lift at the retainer and then at the lifter. Simply divide for the ratio.

Good luck if you think you can slip that past anyone.

Ed Wright · 11-27-2011, 12:17 PM

Quote:

Originally Posted by Reed Granrt

NoNoNo Adger, You missed the point. Have the rockers stamped with the ratio you want on it. They will not know how to measure to see what it really is.
reed

That's funny right there! I don't care who ya are.

SS Engine Guy · 11-27-2011, 10:58 PM

Quote:

Originally Posted by Jason

Is that so? I would think a techman knows to measure the lift at the retainer and then at the lifter. Simply divide for the ratio.

Good luck if you think you can slip that past anyone.

Been done for years.

11-24-2011, 11:52 PM	#1
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Roller rocker ratio So if I read the rule right I can put 1.70 arms on the 230 6cyl instead of "factory" 1.75? (Harland Sharpe makes a 1.7 for the 230.....the factory arms that are on the car are anywhere from .354 to .382 lift .388 is spec) __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

11-25-2011, 04:16 AM	#2
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Roller rocker ratio This no rocker ratio listed has just opened a can of worms. When you just have a lift rule there are all sorts of ways to design the cam and rocker ratio to get the job done. Talk about different lobe designs. One thing I would not do is use a rocker that had it's actual ratio or any ratio stamped on it. Ask Jeff teuton about that!! __________________ Adger Smith (Former SS)