so it was mentioned to me that mabey i should invest in some rockers & rollers. What exactly do these do? Were can i get some? What kind of gains should i expect? i have a 4.0 sohc

 

Save your money. Your 4.0 SOHC came from the factory with roller followers.

 

What the heck is a roller follower??

 

Roller Follower [ THK ]

 

In the case of the 4.0L SOHC, the roller follower assembly is a device that contacts a hydraulic lash adjuster at one end, the valve stem at the other and has a roller for the camshaft in between.

In the diagram, the roller follower is #3, the lash adjuster is #4.

 

Don't question the Great Bob's vast bank of knowledge...

 

On engines where the cam is in the block (ohv) you can usually sneak in a shorter "rocker arm". What this does is to open the valve a little more with the same cam. That increased valve opening allows more air in.. and there-for you can make a little more power.

However a OHC (over head cam) engine has the lifter -to- cam -to- valve distance fixed. A different set of lifter won't open the valve any more than it already does.
You could maybe get a lighter set.. or maybe one that will give less friction. But you can't gain any mechanical advantage and open the valve any further.

Rich

 

sorry for the thread jack but bob i've been stalkin your posts and you are the MAN!!! btw i freakin LOVE your truck!!!! thats my dream ranger!!!!

{end thread jack}