Differences
This shows you the differences between two versions of the page.
Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
techtalk:ih:engmech04a [2019/06/14 18:58] hippysmack [Pros and Cons of Functionality] |
techtalk:ih:engmech04a [2019/06/14 19:19] hippysmack [Pros and Cons of Functionality] |
||
---|---|---|---|
Line 44: | Line 44: | ||
Your pushrods are doing the same thing 29 times a second at 3500 rpm. \\ | Your pushrods are doing the same thing 29 times a second at 3500 rpm. \\ | ||
The last thing we want is to make things less rigid. \\ | The last thing we want is to make things less rigid. \\ | ||
+ | |||
+ | The pushrods have enough trouble with harmonics without adding another place for the valve train to flex. ((mrmom9r of the XLFORUM http://xlforum.net/forums/showthread.php?t=1682099&highlight=splitting+rocker+box)) \\ | ||
+ | I've seen flex as high as .025" just rolling an engine with big valve springs over on the bench. \\ | ||
Even on dead stock valve train the naked eye can actually see the pushrod end of split boxes flex when pushing the kicker thru. ((DR DICK of the XLFORUM http://xlforum.net/forums/showthread.php?t=1719533&highlight=splitting+rocker+box&page=2)) \\ | Even on dead stock valve train the naked eye can actually see the pushrod end of split boxes flex when pushing the kicker thru. ((DR DICK of the XLFORUM http://xlforum.net/forums/showthread.php?t=1719533&highlight=splitting+rocker+box&page=2)) \\ | ||
Line 74: | Line 77: | ||
To keep the strength of the center bolt design, you can weld up the oiling cross hole and run external lines from the outside. ((ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1998127&highlight=split+rocker+box&page=2)) \\ | To keep the strength of the center bolt design, you can weld up the oiling cross hole and run external lines from the outside. ((ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1998127&highlight=split+rocker+box&page=2)) \\ | ||
That is better than splitting the boxes. \\ | That is better than splitting the boxes. \\ | ||
+ | |||
+ | To dual plug the heads, the plug electrode location is what is critical, not the angle the plug screws in from. ((ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1682099&highlight=splitting+rocker+box)) \\ | ||
+ | You can use a small spark plug 12mm or even 10mm. A big plug doesn't make any bigger spark. \\ | ||
+ | {{:techtalk:ih:engmech:dual_plugging_ihs_1_by_ryder_rick.jpg?direct&300|}} ((photo by ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1682099&highlight=splitting+rocker+box)) \\{{:techtalk:ih:engmech:dual_plugging_ihs_2_by_ryder_rick.jpg?direct&300|}} ((photo by ryder rick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1682099&highlight=splitting+rocker+box)) \\ | ||
====== General Process Of Splitting the Rocker Box ====== | ====== General Process Of Splitting the Rocker Box ====== |