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5/16 pushrods with performer rpm springs #1479968 08/05/13 09:51 AM 08/05/13 09:51 AM
Joined: Jun 2006 Posts: 115 Sydney, Australia T tuff440 OP member
tuff440 OP member T Joined: Jun 2006 Posts: 115 Sydney, Australia	I have some trw moly 5/16 pushrods that i bought years ago and i would like to know if they will be strong enough for my combo which uses performer rpm heads with the supplied hydraulic springs and comps xe285hl cam.

Re: 5/16 pushrods with performer rpm springs [Re: tuff440] #1479969 08/05/13 10:28 AM 08/05/13 10:28 AM
Joined: Nov 2009 Posts: 2,177 ill D dennismopar73 top fuel
dennismopar73 top fuel D Joined: Nov 2009 Posts: 2,177 ill	You should be good to go, just check the lenght make sure they will be correct for what you have!

Re: 5/16 pushrods with performer rpm springs [Re: tuff440] #1479970 08/05/13 10:29 AM 08/05/13 10:29 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: I have some trw moly 5/16 pushrods that i bought years ago and i would like to know if they will be strong enough for my combo which uses performer rpm heads with the supplied hydraulic springs and comps xe285hl cam. If you knew the wall thickness it would be easy to say.. but on a hd cam I would say yes you can use them.. I am running 5/16" push rods on a 620# springs but the wall is .120

Re: 5/16 pushrods with performer rpm springs [Re: dennismopar73] #1479971 08/05/13 10:47 AM 08/05/13 10:47 AM
Joined: Oct 2003 Posts: 7,506 Az Crizila master
Crizila master Joined: Oct 2003 Posts: 7,506 Az	Quote: You should be good to go, just check the lenght make sure they will be correct for what you have! Fastest 300

Re: 5/16 pushrods with performer rpm springs [Re: Crizila] #1479972 08/05/13 11:19 PM 08/05/13 11:19 PM
Joined: Jun 2006 Posts: 115 Sydney, Australia T tuff440 OP member
tuff440 OP member T Joined: Jun 2006 Posts: 115 Sydney, Australia	Not sure on the wall thickness. The part number is 48821, I will try and find some details somewhere. 7803949-DSCN0623.JPG (98 downloads)

Re: 5/16 pushrods with performer rpm springs [Re: tuff440] #1479973 08/05/13 11:25 PM 08/05/13 11:25 PM
Joined: Jun 2006 Posts: 115 Sydney, Australia T tuff440 OP member
tuff440 OP member T Joined: Jun 2006 Posts: 115 Sydney, Australia	Will try that photo again 7803959-DSCN0623.JPG (89 downloads)

Re: 5/16 pushrods with performer rpm springs [Re: tuff440] #1479974 08/05/13 11:33 PM 08/05/13 11:33 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Not sure on the wall thickness. The part number is 48821, I will try and find some details somewhere. Is that gonna be the proper length for your set up

Re: 5/16 pushrods with performer rpm springs [Re: MR_P_BODY] #1479975 08/06/13 12:43 AM 08/06/13 12:43 AM
Joined: Jan 2003 Posts: 20,813 A collage of whims topside Too Many Posts
topside Too Many Posts Joined: Jan 2003 Posts: 20,813 A collage of whims	I don't think those springs are all that stiff, maybe 350-360# or so IIRC. Those pushrods are probably about .080 wall or so. Hope the cam doesn't have a lot of lift or fast ramps. For a mild/stockish setup it wouldn't seem to be a problem under 6000 RPM.

Re: 5/16 pushrods with performer rpm springs [Re: topside] #1479976 08/06/13 12:47 AM 08/06/13 12:47 AM
Joined: Jul 2010 Posts: 2,091 Delray beach, Florida P Performance Only top fuel
Performance Only top fuel P Joined: Jul 2010 Posts: 2,091 Delray beach, Florida	On the Edelbrock springs I've tested lately, they seem to only be around 120 seat and 295 open. A lot of the old TRW pushrods were only .060 wall. machine shop owner and engine builder

Re: 5/16 pushrods with performer rpm springs [Re: Performance Only] #1479977 08/06/13 03:45 AM 08/06/13 03:45 AM
Joined: Jun 2006 Posts: 115 Sydney, Australia T tuff440 OP member
tuff440 OP member T Joined: Jun 2006 Posts: 115 Sydney, Australia	I wont know if the length is right until I get the heads back. I was originally going to use some 452 castings and bought those pushrods to work with them. If there to short I will get some 3/8 pushrods instead. Just unsure about the wall thickness and the XE285HL cam is an aggressive lobe. My head guy called today and said most of the guides were tight and the seats were offset from the guides. Glad I had them checked.

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