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#1 | ||
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OHVs and DOHCs are yesteryear. This valve system freaked me out, man!
Coates SRV - V-8 Racing Engine ![]() Coates Patented Rotary Valve System ![]() CSRV 6-Cylinder Engine Head & Components ![]() http://www.coatesengine.com
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#2 | |||
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There was an article in Motor awhile ago, maybe 1 yr?..
Went through the workings of the Spherical valve system, also noted a couple of advantages & disadvantages...
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FORD GIVING POWER TO THE PEOPLE Alloy headed 347ci EDXR8 13.21 @107.7mph Quote:
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#3 | |||
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Well, here's the positive spiel on the system...
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#4 | |||
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#5 | |||
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#6 | |||
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Increased engine efficiency
adaptable to all fuel types Reduced lubrication requirements Lower manufacturing costs Lower emmissions
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FORD GIVING POWER TO THE PEOPLE Alloy headed 347ci EDXR8 13.21 @107.7mph Quote:
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#7 | ||
Last warning
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someone make one for eseries :P
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#8 | ||
LPG > You
Join Date: Dec 2004
Location: Sydney, NSW, Australia
Posts: 4,277
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I posted about CSRV on the old Ford Forum. And yes, it makes OHV and DOHC look like a total waste of time.
Coates put his Spherical Rotary Valve setup on a stock Ford 302W that was producing 260hp 260ftlbs... and from that simple change, the engine was producing 450hp 450ftlbs, able to spin 14,750rpm, and was driven 275,000 miles (440,000km) on the street to prove its reliability. Bring on CSRV I say! |
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#9 | ||
LPG > You
Join Date: Dec 2004
Location: Sydney, NSW, Australia
Posts: 4,277
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Oops... didn't notice what I posed was already in the article on Post #3...
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#10 | ||
X-Series Club Moderator
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Yes, sure. I'll bet any windor could run to 14,000 RPM with just a head change. I mean, what would subjecting any stock (or 99.99% of aftermarket) pistons/con rods/cranks to speeds 2-3x higher than they were intended?
I'll give you a hint.... and it involves engine pieces normally found on the inside winding up on the road underneath. The technology might be workable one day, but seriously, that is a load of crap. |
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#11 | ||
Regular Member
Join Date: Jan 2005
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would it be that hard to change over for manafacturers eg Ford and Holden?
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LPG > You
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#13 | ||
FF.Com.Au Hardcore
Join Date: Dec 2004
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Yes but explain how they got stock Wheezer rods/crank/piston to endure 15000rpm? It isnt possbile.....
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#14 | ||
LPG > You
Join Date: Dec 2004
Location: Sydney, NSW, Australia
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The CSRV setup doesn't use the factory piston. It eliminates the camshaft completley for a start.. its a completley new top end, and reduces the rotating parts in an engine by a great amount.
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#15 | |||
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This shit is pure gold, it gives me a fat just thinking about a GTHO that will rev to 14,ooorpm. |
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#16 | ||
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Im willing to pull my Boss apart as a test car for these new heads. Who's going to donate them to me.
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#17 | ||
FF.Com.Au Hardcore
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Location: South Australia
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Pistons may have changed but that doesnt make the rods or crank any more durable... less top end friction would make a slight difference but nothing like 3 times the normal engine speed! its just not possible even as xdc351 said with 99.9% of aftermarket parts...
BTW im not doubting that there are some benifits of these heads..
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RIP...
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Quote:
It has nothing to do with how reliable or efficient the intake system is, it's to do with piston speed, conrod strength, block strength, etc. I'm not doubting the system, however the test seems ot be a little one sided if they compare a Wheezer which is only producing 260hp to there head which produces 450hp. It's pretty common knowledge that a good 5L Wheezer can produce in excess of 500hp (and more) with the right combination. So whilst there system looks good, it will take a more sensible comparison to prove the sceptics. Rick.
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#19 | |||
^^^^^^^^
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![]() Read more here;http://www.dself.dsl.pipex.com/MUSEU...aryValveIC.htm I agree with those saying it has potential but there are issues that I'm not convinced have been overcome. The main one being the forces created in the combustion chamber acting on the rotary device during the combustion stroke creating friction. Convince me that's not a problem without just quoting the promotional material. In a convential setup (poppet valve) this force acts to seal the combustion chamber and isn't creating any friction.
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#20 | |||
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Quote:
If the rotary valve technology were that good, I'm sure manufacturers would seize the opportunity to launch it as it has fewer moving parts...
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#21 | |||
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I agree its still interesting technology, I mean so is variable length intakes :P
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FORD GIVING POWER TO THE PEOPLE Alloy headed 347ci EDXR8 13.21 @107.7mph Quote:
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#22 | ||
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I'm still hanging for a flux capacitor (non-ebay) to come out on the market!
That valve concept is fascinating... Even if it is old-skool '30s stuff, by comparison the turbocharger was invented in 1925, and look how long it took before they became truly popular (80s/90s). -Dave- |
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#23 | ||
FF.Com.Au Hardcore
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Give me BMWs Valvetronic technology any day. Tried and proven valve and rocker technology with a very interesting method of dynamically varying valve lift. Combine this with BMWs VANOS variable cam timing system and you have dynamically variable lift (0mm - 9.7mm) and dynamically variable cam timing (up to 60'). This, in my opinion, is the next best thing to a camless engine.
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#24 | ||||
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I wonder why the website hasn't been update since 2003?... http://www.coatesengine.com/news.html
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#25 | |||
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this is after 2003?
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#26 | ||||
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#27 | ||
Ute Forum Moderator
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There was a rotary-valve head for Holden grey sixes in the fifties built by a guy by the name of Dunstan in South Australia, allowed the Grey motor to see 9000rpm apparently.
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#28 | ||
Grinder+Welder = Race car
Join Date: Jan 2005
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My RG500 has rotary valves, however thats a slightly different form of the technology...
The thing I see that I don't like is the port shapes, and the fact that you can't control how fast the "port" opens... Its one of the reasons why rotary valved 2strokes were over-run by reed valved 2 strokes.... Sure, you can make the ports huge to overcome the poor shaping, but then you get low flow velocities etc. Nice Idea, sure it has applications, but not in high po cars Bish
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#29 | ||
An Old Boss™©
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If you can't get valve bounce with this then you're NOT TRYING HARD ENOUGH!!!
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#30 | ||||
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![]() ![]() There had to be someone...
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FORD GIVING POWER TO THE PEOPLE Alloy headed 347ci EDXR8 13.21 @107.7mph Quote:
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