The after market offer roller tips, this helps in the wear dept. and faster rpms.
Rocker Arm question ..............
Thread Starter
Burning Brakes
Joined: Sep 2002
Posts: 924
Likes: 0
From: Dothan AL
Rocker Arm question ..............
..I have a ZO6 with Kooks headers, Off road Xpipe, Halltech stinger and a few more bolt on goodies and dyno tune.
Thinking about changing rocker arms to roller rockers. Any suggestions on ratio and any increase in HP.
Also looking to do underdrive pully's and I see some kits that are only the crank pulley.
Is it worth the trouble to get different pullys for accessories ?
Thanks in advance for your help.
Thinking about changing rocker arms to roller rockers. Any suggestions on ratio and any increase in HP.
Also looking to do underdrive pully's and I see some kits that are only the crank pulley.
Is it worth the trouble to get different pullys for accessories ?
Thanks in advance for your help.
Melting Slicks
Joined: Jun 2003
Posts: 2,156
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From: S.W. Ohio
I may be wrong but here it goes. The factory units are rollers already. The aftermarket units are stiffer than the stock units and more reliable at high RPM's. If you change to the aftermarket rockers you have a higher lift option of 1.85 instead of the stock 1.7. I looked into this swap and was steered away. For the price of the rockers you can buy a cam and some of the needed hardware to make a cam change.
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Originally Posted by gojo
You're right that you are wrong. The stockers are not rollers. 
Welll, half right.
Stockers are rollers, but at the fulcrum only. The tips are not.Aftermarkets are rollers at both locations (fulcrum and tip). The good thing about roller tips is not only the additional decrease in friction, but the added longevity of your valve guides too.
I agree that is a big expense for relatively little gain in power, unless of course you're doing a lot of other serious mods at the same time.
Safety Car
Joined: Nov 2003
Posts: 4,979
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From: San Diego, CA "leaf" "tee" "e"
Roller tips are supposed to help the engine run cooler too. I guess I'll find out since soon I just ordered a set of new Harland Sharps on Wednesday for $300 shipped, which is the same price or cheaper then any cam I've seen. I'm mostly doing it for better reliability, and it'd be nice to enjoy a quieter engine and maybe a couple HP too.
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Thread Starter
Burning Brakes
Joined: Sep 2002
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From: Dothan AL
Originally Posted by leaftye
I sent you a PM. It was part a GP you missed, but they do it every couple of months.
Let me know where you got them also. Maybe we can get a group purchase going.