W
I bought Fluoroelastomer, I got 6 of each size and it was right at 20 bucks, considerably less than what psi wants. And I didn't have to give Bruce a card number.
Dial-A-Dome heads
- Thread starter w browning
- Start date
1
The ones up inside the head don't see the heat like the one around the bore itself, so it really isn't that big of a deal if they're viton or not. If you do need some viton o-rings, you can have your local hydraulic shop measure them and get them or mc master carr has just about every o-ring you can imagine if you know the sizes you need.
W
The o-rings I bought are rated to 400 degrees so they shoulf be fine. I also ordered viton for the outer water jacket and compression ring. I got off a lot cheaper than dealing with PSI. I got them from McMaster-Carr, received in four business days, unheard of here in the sticks.
E
Hey guys, just stumbled across this post. Does this mean I should steer clear of the Dial a Dome head? I liked the idea of being able to adjust the squish as my riding typically consists of either 2-3000 feet or 5-7000 feet.
I have been toying with the idea of a RK Tek 827 Big Bore as well.....
I have been toying with the idea of a RK Tek 827 Big Bore as well.....
W
I got mine back together today and they adjust relatively easy. I checked the compression and it went from 140 to 175 psi. I settled on 150 and I mixed 32 oz's of torco accelerator with 10 gallons of 91 oct ethanol free gas. Race fuel is 150 miles away so I'll try this stuff. The concept of adjustable compression is a cool idea but from what I gather leakage is common place if the domes are moved frequently. The o-rings are easily replaced if in fact the threads don't lock up like mine did. I let them soak in pb blaster over night and when they broke loose they came apart easily.
B
i just bought a psi motor, i know tghe stories..... im leaking antifreeze out of the top of the dial a dome.... whats the process for rebuild? anmd anyone have orings they want to sell