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Old 05-29-2013, 08:52 PM
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coates spherical valves

I have never heard about them. were mentioned in other post. I would love to hear about this, 15k wow. whats the deal?

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Old 05-29-2013, 08:55 PM
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look at f-1 type engines with rotary valves
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Old 05-30-2013, 06:33 AM
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Or this site for the Coates system: CSRV System - Coates International Ltd.
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Old 05-30-2013, 09:41 AM
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the big deal would be obtaining a license to build heads for one of the engines we use from those guys..That business dealing woudl have a great bearing on the practical availablity of the heads...

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Old 05-30-2013, 02:02 PM
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I would like to know how they obtain a good and reliable seal on those rotating ball valves.
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Old 05-30-2013, 09:19 PM
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Many benefits are in that design. No oil in valve train. The valve not hammering open closed open, but spinning constantly. No resistance from heavy spring pressures. It looks awesome. Gimme a block with a bunch of crank thrust bearings so you can hammer it good.

The reid valve or vibrating valve was a pretty simple idea too that never caught on.
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Old 05-31-2013, 10:24 AM
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Quote:
Originally Posted by Silver Surfer View Post
I would like to know how they obtain a good and reliable seal on those rotating ball valves.
Click the link that Road Warrior posted, then click the CSRV Advantages bar in the gray box and play the animation video that comes up. The sealing rings are located at the entrance to the cylinder.
IMO this is one of the coolest advancements in internal combustion engines that I've ever seen. Could almost certainly be combined with VVT for even more advantage. If auto engineers aren't working on making this system affordable there's something wrong, JMO!

Last edited by 68NovaSS; 05-31-2013 at 05:20 PM. Reason: Change are to aren't
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Old 06-04-2013, 03:23 PM
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I get the idea they are waiting to be bought out? Not sure?
One thing I am sure of is the typo's
Anybody notice the statement about 50's and 60's compression ratio's in the 12to1 range. Sure they were!
Went as far to say most sixties and seventies engines were 12 to 1.
Oh brother! Did I miss something?

Cool tech regardless!
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Old 06-04-2013, 03:34 PM
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Originally Posted by Nonhog View Post
I get the idea they are waiting to be bought out? Not sure?
One thing I am sure of is the typo's
Anybody notice the statement about 50's and 60's compression ratio's in the 12to1 range. Sure they were!
Went as far to say most sixties and seventies engines were 12 to 1.
Oh brother! Did I miss something?

Cool tech regardless!
Yeah that is why they had dome pistons and angled spark plugs...to achieve that high compression ratio. The 1962 Dodge Dart 413 was 13.5:1. 12:1 was not unheard of.
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Old 06-04-2013, 03:44 PM
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It is cool US tech. And it is valid technology. Unfortunately it is a game of patents, lawyers and LLCs I think. But I don't really know. I know metal.
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Old 06-04-2013, 03:58 PM
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Originally Posted by Silver Surfer View Post
Yeah that is why they had dome pistons and angled spark plugs...to achieve that high compression ratio. The 1962 Dodge Dart 413 was 13.5:1. 12:1 was not unheard of.
I get that. The point I was making was they made no mention of "race only"
Sure a few cars made it on the streets like that but it was rare. Very rare.
Not common like they made it out to be in there website.

Had they spelled it out more clearly it would not be worthy of mention.
As it is, its very misleading. That's all!
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Old 06-04-2013, 05:54 PM
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Popular Hot Rodding did an article back in the 90's on these heads. I seem to remember them putting the heads on a small block ford and running them up to something like 13k rpm. The claim was around a 40% increase in power because of gains from reducing friction.

I believe they tried to get a few auto manufacturers to use the heads on their engines. For some reason it never happened. I think for a while they had heads available for sale for the sbc and maybe ford w.

Last time I heard they were manufacturing heads for diesel generators.
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Old 06-04-2013, 09:10 PM
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nonhog

Quote:
Originally Posted by Nonhog View Post
I get that. The point I was making was they made no mention of "race only"
Sure a few cars made it on the streets like that but it was rare. Very rare.
Not common like they made it out to be in there website.

Had they spelled it out more clearly it would not be worthy of mention.
As it is, its very misleading. That's all!
there are 12:1 CR engines now? they are, and were not rare.different technology now.
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