Coates Spherical Rotary Valve - why hasn't anyone produced these large scale?

[NeufUnSix]

why?

Indy cars can hit 20,000 rpm

An indy motor isn't a street Lincoln V8. They simply aren't designed to handle that kind of stress and piston speed. Most I've heard is about 8000 from a pushrod V8 in a top fuel dragster, and those things are designed to go down the quarter once without blowing (and many don't make it that far). Obviously they have a fair bit of tuning work to achieve that.

[junior varsity]

and super light unobtainium internals.

[Mother]

An indy motor isn't a street Lincoln V8. They simply aren't designed to handle that kind of stress and piston speed. Most I've heard is about 8000 from a pushrod V8 in a top fuel dragster, and those things are designed to go down the quarter once without blowing (and many don't make it that far). Obviously they have a fair bit of tuning work to achieve that.

true

however

My pops used to spin his 4.3 ltr Chevy V-6 in his sprint car at 12,500

so it is possible for a modified motor

a Lincon V-8 in stock trim is questionable unless they were doing it via the crank with a secondary power source

and not with combustion

[Speedbag]

Seems to me Rotax messed with a rotary valve engine a while back and it didn't go so well.....

[Mad Duc]

http://finance.google.com/finance?q=COTE&ie=UTF-8&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&sa=N&tab=we

I'm not buying a lot of what they are selling. If they really had something good they would be in production with someone. If you have a truly radical idea (that actually works) then you don't need the cheesy PR they have.

[Capt baz]

just the name of it makes my brain hurt.

[mitt]

Another rotary valve system different than this one is a system (I don't remember the name) where the bore sleeve spins, and there are side ports like a 2 stroke almost that open and close.

[Speedbag]

Another rotary valve system different than this one is a system (I don't remember the name) where the bore sleeve spins, and there are side ports like a 2 stroke almost that open and close.

That almost sounds like the thing I mentioned above.....