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Re: Indy 360-1 Roller Rockers [Re: Kindafast] #2732228 01/11/20 07:10 PM 01/11/20 07:10 PM
Joined: Oct 2005 Posts: 1,927 Seaford, Va Kindafast OP top fuel
Kindafast OP top fuel Joined: Oct 2005 Posts: 1,927 Seaford, Va	I will tell you what , Todd at Marsh Performance is one of the most stand up guys out there. I talked with him today while he was building an engine and he stopped what he was doing to shoot the breeze with me. Told me to call him Monday and he would get me straight with the parts I need to fix these rockers. I will make sure the car is still running okay and then most likely get with a nice member here about getting his TD rockers for the real fix.. Thanks again for all the advice guys.. 6.50 @105.26

Re: Indy 360-1 Roller Rockers [Re: Kindafast] #2732275 01/11/20 09:40 PM 01/11/20 09:40 PM
Joined: Aug 2003 Posts: 43,129 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,129 Bend,OR USA	I've used a bunch of different single shaft aluminum roller rocker arm set up's including T&D and Harland Sharps. I've seen a small variance in the net lift on both the H.S. and T&D, I prefer the H.S. as they will custom make the exact ratio you want if your willing to wait a week or two I just finish dealing with a issue on a set of T&D single shaft that where suppose to be 1.65 ratio that ended up being 1.76 or so on a set of 440-1 heads That really messes with the coil bind when setting up the valve springs based on net lift Luckily I ended up checking the net lift at the retainer and discover that issue before delivering the motor to my customer, it was a pain in the butt to fix it on the engine also I will buy H.S. before I buy another set of T&D single shaft sytem Last edited by Cab_Burge; 01/11/20 09:41 PM. Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Indy 360-1 Roller Rockers [Re: Cab_Burge] #2732404 01/12/20 11:14 AM 01/12/20 11:14 AM
Joined: May 2005 Posts: 1,968 Apollo, PA. B1MAXX top fuel
B1MAXX top fuel Joined: May 2005 Posts: 1,968 Apollo, PA.	Running lash too loose/ weak springs will contribute/accelerate the life of those rockers. Valve bounce/float is very hard on rockers.

Re: Indy 360-1 Roller Rockers [Re: Kindafast] #2732408 01/12/20 11:39 AM 01/12/20 11:39 AM
Joined: Oct 2007 Posts: 4,206 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,206 New York	Single shaft high ratio rockers will always have the pushrod cup/ball closer to the shaft CL (unless the shaft is moved over) because that's where the ratio change comes from: there's no way to increase the length of the long (valve side) lever w/o pushing the roller over to the far end of the stem tip. Boffin Emeritus

Re: Indy 360-1 Roller Rockers [Re: Cab_Burge] #2732432 01/12/20 12:50 PM 01/12/20 12:50 PM
Joined: Sep 2014 Posts: 4,457 Washington M madscientist master
madscientist master M Joined: Sep 2014 Posts: 4,457 Washington	Originally Posted by Cab_Burge I've used a bunch of different single shaft aluminum roller rocker arm set up's including T&D and Harland Sharps. I've seen a small variance in the net lift on both the H.S. and T&D, I prefer the H.S. as they will custom make the exact ratio you want if your willing to wait a week or two I just finish dealing with a issue on a set of T&D single shaft that where suppose to be 1.65 ratio that ended up being 1.76 or so on a set of 440-1 heads That really messes with the coil bind when setting up the valve springs based on net lift Luckily I ended up checking the net lift at the retainer and discover that issue before delivering the motor to my customer, it was a pain in the butt to fix it on the engine also I will buy H.S. before I buy another set of T&D single shaft sytem Are you checking the ratio with checking springs or the springs you will use? Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston

Re: Indy 360-1 Roller Rockers [Re: madscientist] #2732448 01/12/20 01:21 PM 01/12/20 01:21 PM
Joined: Aug 2003 Posts: 43,129 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,129 Bend,OR USA	I did both on that motor, less than .005 differences at the retainers Manton series five 3/8x .142 wall pushrods Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Indy 360-1 Roller Rockers [Re: Cab_Burge] #2732510 01/12/20 05:06 PM 01/12/20 05:06 PM
Joined: Oct 2007 Posts: 4,206 New York polyspheric master
polyspheric master Joined: Oct 2007 Posts: 4,206 New York	Never mind Boffin Emeritus

Re: Indy 360-1 Roller Rockers [Re: polyspheric] #2732590 01/12/20 10:27 PM 01/12/20 10:27 PM
Joined: Aug 2012 Posts: 300 Willow Spring dagohman enthusiast
dagohman enthusiast Joined: Aug 2012 Posts: 300 Willow Spring	http://www.hughesengines.com/Index/...e=partnumber&page=3&partid=34443 Hughes has 1.5 and 1.6's. Ive never used them, but Id bet they are just as good if not better than the Dove ones. Last edited by dagohman; 01/12/20 10:29 PM.

Re: Indy 360-1 Roller Rockers [Re: dagohman] #2732627 01/13/20 01:18 AM 01/13/20 01:18 AM
Joined: Aug 2003 Posts: 43,129 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,129 Bend,OR USA	I've used the Hughes Cyro treated 1.6 rockers for the Eddy Victor M.W heads on a roller cam 400 block bracket race motor and ended up putting a set of Harland Sharp on that motor after two failures with the Hughes parts No more rocker troubles after that Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

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