www.omnivalves.com

There's a thread going on about this over on ls1tech http://www.ls1tech.com/forums/showthread.php?t=612959


I saw these and my first thought is that they're heavy, they'll detonate, rev slow, and just plain all around suck. However, I am far from even well educated in these areas so I thought I would throw it up here and see if there's any reason we all should stray from conventional thinking.

 

My opinion if they do what they say is that it is a low rpm application. Say under 4500rpm. Just fine for Jeeps and rock crawlers that like low rpm torque.

 

Sounds like a good valve for an L98 (low redline) build up... assuming the valves actually survive more than 30,000 miles without puking their guts (or ring ).

Seems like the beefy valves would be less likely to tulip the edges though. Add-in some fast-bleed lifters and you could get some wicked low-end torque from a cc306 or something similar... assuming you could actually rev it up to the point of using that big cam.

Drawbacks? It's designed would have the most benefit on big cams with lots of overlap... and yet big cams need to run high rpms to really get to their sweet-spot, which these valves would prevent you from getting to.

If they came up with a titanium version they may overcome the RPM/weight issue... but then you're right back at the durability issue.

Probably a great thing for diesel engines though... assuming it's durable enough to last.

 

I have seen them too.
They look heavy and on another message bord it looks like an omni valve sales person found us.
He won't answer my heavy valve or high RPM questions.
He is kind of pushing them as a street car or gas milage thing and says that the major auto mfrg's won't look at there valves.
He also claims that you have to change you cam timing, I asked how several hours ago and he has not gotten back on that site yet.

 

Thanks for you interest in OmniValves ...........

A couple things , Weight the valves are about 20 to 40 percent heavier, depending on the Omni Ring total amount of lift. The lift on the valves varies depending on the use. Also on the weight, the ring floats, since it floats it is not always added to the weight. If you remove the weight of the ring the valve is only about 10 to 30 percent heavier. If we make the valves out of titanium that makes the valve about the same weight as a stock valve.

With stock springs we have had no problem with valve floating or any other problems at RPMS up to 6500 with our omnivalves.

As far as pre ignition, we have no problem at all with pining.

The cam timing does not have to be change, it is the ignition timing that has to be changed, about 10 to 12 degrees retarded. We run most of the motors at 20 to 24 degrees total advance.

Our valves do work good with big overlaps, because there is no negative effect from the overlap, only the good and none of the bad.

But we believe we get the biggest gains on the compression overlap. Something that is rarely talked about because until now nothing could be done about it.

Thanks for your checking out OmniValves. Mike @ omnivalves

 

tieman55 you had a couple of engines being assembled with the Omni-Valves. Any dyno results yet?