dw10 crank swap 400HP

[japie]

Here the promised "low pressure" pressure regulator mod which controls the pressure of the hydraulic studs of the valve train.
Warning: setting it to high will keep your valves open and can cause serious damage!

   
Here the position of the regulator in the head.

   
Here the disassembled regulator, drilled the cover plate with spring holder out with an 6.8mm drill so we can use M8 treats afterwards.
Pay attention, drill little bits at the time until the spring and ball comes out, if you go to deep in one step you will damage those tiny parts.
When the spring and ball are removed drill with the same 6.8mm drill up to the bleed off holes that go trough and trough, after that put some M8 treats in it but use a "blind hole cutter" else you won't get deep enough.

   
Here the finished parts before mounting and adjusting.
I used a M8x10 grub screw :-) and made a little spring holder 2mm long 3mm diameter on the lathe, the max. pressure I can get out is 4bar, the original setting is 2bar. (using a tire pressure gauge and some hoses to adjust)
Since I use 30% stiffer springs and the cam is a bit wilder I set the pressure at 3bar.
Before mounting glue the M8 with Locktite (else it will leak) and make sure you adjust it before it hardens.