PDA

View Full Version : Cobbled together DIY rocker arm Q?



zillarob
10-23-2019, 09:42 PM
Hi, new here. Usually play with VW and Audi, but these goofy little cars are sucking me in =)

Typically work with the mentality that if I cant make it better, or completely fk it up while trying to make it better, then I didnt try hard enough =).

The feeble rockers on these motors look like they would be a pretty simple thing to make better, or completely fk up (basically what I am really good at lol)
Have a 3d printer for mock up stuff, and working on an MPCNC (or something similar) that will do light milling.

Trying to do something similar to this https://www.bimmerforums.com/forum/showthread.php?1464720-FS-M10-Billet-Rocker-arms

I have the geometry taken care of (pad runs nicely on the cam and adjuster swings well on the valve stem), but curious if any of you guys know where to get the cam pad gizmo?
I ripped one out of some rando rocker just for fun and mock up stuff. Was fkn scary how easily that arm exploded! I think I had Matchbox cars back in the day that put up more of a fight lol.

The part I am struggling with now is the pad I pulled out has a rough square cast/forged? post sticking off the back of it, but dudes pics in the link above show a round hole.
I could just ram it in there and hope for the best, I mean it aint going nowhere, but do any of you guys know of somebody that sells the pads separately, or a mfg that does them with the round post that I can rip out and will press in easier?

Eta Here is a pic of one at some point. Its still rough and just a mock up while looking at the geometry, will pretty it up after the proper adjusters get here an I am happy with how it works.

https://lh3.googleusercontent.com/YhyqOPOEPEBN-s14Buce3Po-egcNuGlDb2fHiW0_BZbjC_8tloQhvpTwScEqrifsdQvSR2wCYc tGVMr0oOgRZQXNJVWCjQZ2REkcvlMsjEYqCDbhxoIhURwQNJ2n kVAtpC7C_ChUicm-634znUtXhpdx_O1b492Xf0fZS8KDyeVbAcjRAsgDEE20JbKNUh HVWoGTVh2SWOedXrlU4G7Dzxl7uybyEfOasTvMPhUXas4BNw71 G1Q4gFcgQd5gisqTKJaVZVTjo6Xi3Qo51PuVtr3AAjfbMnCVi7 GH70BRlQpwkF0siW3kB3MxgSMRsKRKcUrqIsuZ-xROogJgXGi_sNujrr4bqR0Z-pA5fdC_x3fZj4SrJCh4DByWy7Xq7xQoGN5Gd1dD3Hy_z0x-5mm1lJMKNg81dM_x7qF9g-YH8-hSgfg7IzSdi4HhLGKtw1P3Iwm_QtYl1tUhaHpPqsVJHa7R7eF6 XhrspFUcGt8AjnRiGQ-4YhF93JkvjVzapoNS2GiWq2pxYlASJFvirATZlkSS4gejcU_wb 2PG_DuD8CIfuuG8i9WYwqkd_FR02UiIn1nHV1AR5VDLUXnhj3E-cMuQC9eE2w7QtS0Qhr3yBttYfLJx8Es5CbS1EqiZ5PBTMxkLSu dL5gQ3DJssF7xwYbqTz1mzV7OcOkYZPkEN5igaEv7Dc089BEY= w1010-h757-no

KeysCoupe
10-30-2019, 09:36 PM
Old Buicks from the early '60s-up have alloy rockers with pressed-in hardened pads that ride on the valve stem.
If your going to all the trouble, why not look into a roller setup?
Good luck -Donny

zillarob
11-10-2019, 11:26 PM
The bolt is just there for mock up, they are set up for the porsche style adjusters.

I considered a roller, but would need a roller specific cam. Too rich for my blood =)