Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

are harlands adjustable?

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Old 04-27-2010, 07:38 PM
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Are harland sharp LS rockers adjustable? I had a motor built and just cranked it up so its the first time the lifters have had oil in em and I want to know if the rockers are adjustable or not to set the valve lash. Valvetrain isnt noisey but didnt know if maybe they were tight.
Old 04-27-2010, 09:27 PM
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They make an adjustable rocker for Gen III heads but I don't believe they do on Gen IV heads.

Lifter preload is set by pushrod length with the non adjustables most people run. Just need a $20 PR checker to measure PR length and add in required lifter preload. Let me know if you need more info on how to measure and I can help out.

Who did your motor BTW. I used to live there and am familiar with a few of the shops that way....
Old 04-27-2010, 10:47 PM
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Mayhem Motorsport did, not to pleased but its what I got. Prelode should have been checked as the valve angle was changed with my heads and a shorter pushrod was required. I just didnt know if the harlands were adjustable, never saw em b4 they went on
Old 04-28-2010, 12:57 AM
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If they are quiet I think you are OK. I have never had any personal experince with them but they have been at a while so I gues they should be decent...

Having said that RPM in Garner would be my first choice in the Raleigh area. Those guys have helped me out a couple times and flat out know there ****. Just stop by there shop sometimes and check out what they are doing. Always 2-3 NASTY builds going on...
Old 04-28-2010, 06:41 AM
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ya iv delt alot with RPM, at the time they didnt want to build an engine so I had Mayhem do it. RPM will be doin the dyno thou
Old 04-28-2010, 03:03 PM
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Originally Posted by BigDB
ya iv delt alot with RPM, at the time they didnt want to build an engine so I had Mayhem do it. RPM will be doin the dyno thou

Yeah Ryan tuned my car too. I am getting ready to port my FAST and do a bigger MAF and lid and will be back up there for a tune tweak soon if nothing else pops up..

Not sure but I always thought somebody did RPM's shortbocks and they finished them off but I could very easily be wrong.

Any way tell Jason and Ryan up there SOMbitch said "hi" and good luck with your setup
Old 04-28-2010, 11:23 PM
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Originally Posted by SOMbitch
Yeah Ryan tuned my car too. I am getting ready to port my FAST and do a bigger MAF and lid and will be back up there for a tune tweak soon if nothing else pops up..

Not sure but I always thought somebody did RPM's shortbocks and they finished them off but I could very easily be wrong.

Any way tell Jason and Ryan up there SOMbitch said "hi" and good luck with your setup
Will do man and thanks for the help




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