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That's a pretty remarkable gain -

July 14 2017 at 8:58 PM

Wyo  (Login WyoMan)
YF12


Response to Stuffing the HW40/P3/P17 piston

no doubt your ported channel idea allows for greater piston shimming (stuffing). Tolerances will probably vary, but with the conventional approach, my best effort was with a .025" shim and an o-ring change to U90D 117 (this is a little larger, oem is metric iirc):

[img][linked image][/img]

I never had much luck with foil tape as a shim. I think that the pressure, combined with the lube and moisture condensate, had their toll with the adhesion. But, it's great for testing...easy on, easy off. Well done!

Wyo


 
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