Monday, November 8, 2010

90 valves

The valves for the 90 have been done.
Thinned down the shaft for the length it sticks into the port with full lift on the cam.
This means more space for fuel to get thru and a reduction in weight, this will help in the higher revs.
Also they have been ground into the seats to see where the contact is, and the edges sticking out have been removed and rounded to let fuel pass by the valve easier.

Also removed weight from the side of the valve that is in the combustion chamber, the loss in compression is minnimal, but you will notice the reduction in weight.

Sharp edges removed from the combution chamber.
Now only to wait for my titanium valve spring retainers to come in and then the engine can be completed.

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