Monday, December 9, 2013

Rocker Arm Mania

Good evening. Recently I have been working on locking vtec within a set of z6 rocker arms. 

vtec pins photo vtecpins001_zps549509b9.jpg

I read on a few forums that people would swap the long and short pins to lock vtec. That might work well for a B series but it does not for a single jingle.

vtec pins photo vtecpins007_zps6d0bd56e.jpg

I used a .25" thick nut to space out the vtec pins so they penetrate into each rocker arm equally. 

vtec pins photo vtecpins011_zps4d0991a5.jpg

This seemed to work okay. 

d16 rockers vtec locked photo 112413pictures028_zps70d0e962.jpg

d16 rockers vtec locked photo 112413pictures027_zps497b2ce5.jpg


The only problem is this:

 photo vtecpins010_zps7f85cc19.jpg

The third rocker has a spring loaded pin. With my spacer pushing the vtec pin completely down into the third rocker, the trio assembly seems to bind. Not like a complete bind, just enough to notice a difference. Without vtec locked, the rocker arms move up and down freely on the rocker shafts. Once locked the rocker arms don't move as freely; as if something is misaligned making it harder to move up and down. I think that either the rockers need align bored or the spring loaded pin is somehow putting pressure on the assembly making it appear binding by feel. I have a hunch that the spring loaded pin is the culprit. 

I don't like the bind at all. In fact I am going to make modifications to eliminate this bind. How so you may ask? By removing the spring loaded pin and having one long vtec pin custom machined. Stay tuned!

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