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Silent lash valvetrain

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peeeot
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Posts: 130
Joined: Thu Feb 07, 2008 5:07 pm

Silent lash valvetrain

Post #1 by peeeot » Sun Sep 08, 2019 3:52 pm

Which components are required to complete a silent lash valvetrain? I know that the camshaft and rockers are unique—what about the pushrods, rocker shaft, and shaft supports?

Will the silent lash rockers fit under the 1960 valve cover?

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bubba22349
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Location: Flagstaff, Az. 86005 near the old Route 66

Re: Silent lash valvetrain

Post #2 by bubba22349 » Sun Sep 08, 2019 5:57 pm

To my knowledge when I had the new zero lash parts and compareing them to the solid lifter parts only the cams profile and the rockers arms were different. The rest of the parts such as the mushroom lifters, rocker shaft, and the rocker stands are all the same. I am not sure about the push rod lenght though. Good luck :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

peeeot
Registered User
Posts: 130
Joined: Thu Feb 07, 2008 5:07 pm

Re: Silent lash valvetrain

Post #3 by peeeot » Sun Sep 08, 2019 8:31 pm

Ok, good! Do you have any idea what the rocker ratio is on the silent lash units? I am assuming since the cam lift is reduced the rockers must be higher ratio... plus they look longer.

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bubba22349
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Posts: 9084
Joined: Sun Jan 03, 2010 4:46 pm
Location: Flagstaff, Az. 86005 near the old Route 66

Re: Silent lash valvetrain

Post #4 by bubba22349 » Sun Sep 08, 2019 10:36 pm

I don't think there was any big differance in the cam specs between them unforchaneatly I didn't do a profile of the two cams. Both were solid lifter cams so I don't see any reason for the lift or cam ramps to be modded. One differance in the zero lash cam is that it is cross drilled, this is to send more oil to those special rocker arms, another differance maybe that the distribtor drive gear could be different at 12 tooth I didn't get to verify this though. Sorry I don't know the rocker ratio of the zero lash rockers, my hunch though is that they would need to be close in ratio to the stock adjustable ones. Good luck :thumbup: :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

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