M8 Roller Rockers.
M8 Roller Rockers.
just finished building my M8 and would like to know if anyone is making roller rockers for them yet? (Newbie so sorry if this has been discussed on a thread but can’t find anything)
One thing you may consider is the adjustable rocker arms that are offered by Screamin' Eagle. They're not very expensive and they allow you to make sure there is no variance in clearance on both of the valves on one rocker arm.
I read about your build on "Sumping Sorted", but you never mentioned what cam you are using. Basically the lift heights on M8 cams aren't enough to require roller rockers. They are not recommended on lifts of less than .600 on the TwinCam and I don't know if any of the aftermarket cams available for the M8 are even approaching those kind of lifts. You also didn't say anything about any head work. Lifts above .475 with M8 cams require high lift springs. S&S offers those now as well as Wood Carbs and Screamin' Eagle.
One thing you may consider is the adjustable rocker arms that are offered by Screamin' Eagle. They're not very expensive and they allow you to make sure there is no variance in clearance on both of the valves on one rocker arm.
One thing you may consider is the adjustable rocker arms that are offered by Screamin' Eagle. They're not very expensive and they allow you to make sure there is no variance in clearance on both of the valves on one rocker arm.
I didn’t mention head work or cam on my sumping question because I thought it was irrelevant. Yes I’m running .600 lift Woods with his springs and retainers along with CNC ported heads and 1mm OS int & exh V&H valves. The seat pressure is well over 300pounds on the nose. I ran S&S roller retainers and you really can’t get more lift as the lifter will hit the retainers. CNC machining was done by RAMS in Australia who done a lot of homework on these heads and yes they are still flowing at .600. 1 pushrod rocking 2 valves is very old technology and I don’t see the advantage of having adjustable tips on a hydro lifter but the rockers for now are sitting 100%. Imo .600 * over 300p of spring pressure along with heavy roller lifters long thick walled push rods is not ideal.
Check with www.baisley.com in Portland, Oregon. I know they have converted stock TwinCam rocker arms to roller rockers, but I don’t know if they are doing anything with the M8’s yet.
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