question about rocker arms
03-09-2001, 12:02 PM
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question about rocker arms
how come when I take the valve covers off, I never see the rocker arms in 'mid lift' .. or full lift? their always all flat. i dont understand how they could all be flat(or all are at 0 lift), because the cam doesnt let pressure off all the lifters, or does it?
03-09-2001, 01:32 PM
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Next time you take the valve covers off, hold a straightedge across the rockers. You will see that they are not even.
Remember that you're not dealing with a lot of movement here. Even an aggressive street engine will probably be running around .500" valve lift give or take, which translates to about .333" lobe lift (assuming stock 1.5 rocker ratio). If your engine is stock, the valve lift will probably be no more than .350/.233 valve/lobe lift. That's difficult to see when you are looking at all of the rockers from the top.
If all of your rockers really are flat, I think it's time for a new cam
-Phil
Remember that you're not dealing with a lot of movement here. Even an aggressive street engine will probably be running around .500" valve lift give or take, which translates to about .333" lobe lift (assuming stock 1.5 rocker ratio). If your engine is stock, the valve lift will probably be no more than .350/.233 valve/lobe lift. That's difficult to see when you are looking at all of the rockers from the top.
If all of your rockers really are flat, I think it's time for a new cam
-Phil
03-09-2001, 02:52 PM
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Car: 2002 SOM z28
Engine: LS1
Transmission: T-56
Hehe... just adjust all those that "look" flat to 0 lash and start up the car. I bet 1/2 will tick like crazy!
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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock with the exception of the Holley 750vac... all the suspension stuff... 9-bolt posi disk is in...
-=ICON Motorsports=-
------------------
1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock with the exception of the Holley 750vac... all the suspension stuff... 9-bolt posi disk is in...
-=ICON Motorsports=-
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