Discussing with Utabintarbo.
The 3/16 o-ring is too big. The bolts wouldn't fit. In order to use a 3/16 o-ring, we'd have to make the block longer and wider, which means stepping over the cam box, which means putting a 2mm clearance notch (wich happens to be the baseplate thickness).
So back to plan A: a 1/16 o-ring. I still prefer EDPM, and I have to point out that buna-N won't work with meth, so it's out, at least for me (but I suppose that I could swap it later).
Got the quote back: "$100". I'm thinking of going with the McMaster offering, with a durometer rating Shore-A of 70.
What I don't get is this:
Quote:
Originally posted by unregistered
- when the component surfaces make contact, as they must, there should be 30 to 40% compression of the crossection
- the o-ring's volume should be between 60 and 70% of the groove's
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If the compression is 30 percent, and the o-ring volume is 70% of the groove, isn't the o-ring filling the channel?
If the compression is 40 percent, and the o-ring volume is 60% of the groove, isn't the o-ring filling the channel?
What's the gap supposed to be, if any?
In the mean time, here's Utabintarbo's latest render (without the top).