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-   -   New Valves for my FE! (http://www.clubcobra.com/forums/arizona-cobras/142201-new-valves-my-fe.html)

Phx Mike 04-04-2019 07:19 PM
New Valves for my FE!
 
Unfortunately they are just a little big...my son bought me this for my birthday...it’s a new original stock intake valve for a Wright Cyclone R-1820 radial engine. These are the engines used in the B-17’s in WWII.

Face diameter is approx. 3.060”.

Beautifully made part....and HEAVY!

https://i.postimg.cc/tTDBJRJ5/137-C4...-F37-A7-B5.jpg

https://i.postimg.cc/XJn2nBjq/496-D1...730-C5-FE4.jpg

Bob Broberg SPF667 460BB 04-04-2019 07:31 PM
That might fit in 405 Doc's 959ci mountain NOS motor on Street Outlaws.
You building a B-17 Kit Plane?
AZ Bob

Cobrakeith 04-04-2019 09:02 PM
Nice paperweight

moore_rb 04-06-2019 09:11 AM
Looks just like the intake valves I used when I built my 7000Hp nitro methane Craftsman lawn tractor...

My neighbors all thought I was crazy.

2bars 04-06-2019 02:13 PM
I say find a way to put it in the Cobra...you need more power

Danr55 04-06-2019 02:42 PM
Careful with those. They may be sodium core valves

Phx Mike 04-06-2019 06:08 PM
Quote:
Originally Posted by 2bars (Post 1460195)
I say find a way to put it in the Cobra...you need more power
The R1820 had a displacement of 1823 cubic inches. Bore of 6.125” and stroke of 6.875” (9 cylinders). So about 3.78 times the displacement of my 482. Valve area is 1.85 x that of my FE valves. I don’t know the valve lift but I doubt it is more than 2x the FE and the duration is probably less. So in very rough terms of breathing the valves actually seem a little undersize esp considering peak power was made at 2000 rpm. However these engines had supercharging so quite a bit higher intake charge density. 1000 hp at 2000 rpm.

Only the exhaust valves were sodium filled.

Mike


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