Cheetah powervalves operation

[vainavic]

I have a cheetah 420cc and someone told me that the valves will not open if I dont connect the hoses (from the powervalves) to a intake ports that I have to drill myself, I was wondering if anyone had some info on this. Firehead put up some pics but I would like to hear from some other people before i drill into 2k worth of cylinders, Does making the connect help or whats the story, I think if it was needed the jugs would have came with the ports already.

[FireHead]

It's cool that you don't believe me. At the same time it is quote clear that you don't know what you're doing.

 

Not that the link below is to the best company in the world but if you call them, they will answer your question.

http://www.trinityracing.com/index.html

[vainavic]

Hey your right I have no idea what Im doing, I am only 20 years old and have lots to learn, but I didnt say I didnt believe you, I just wanted to hear other peoples thoughts,

[FireHead]

Hey your right I have no idea what Im doing, I am only 20 years old and have lots to learn, but I didnt say I didnt believe you, I just wanted to hear other peoples thoughts,

 

Give Trinity a call and ask them where the lines go. Don't let them try and sell you anything. :thumbsup:

[FireHead]

Give Trinity a call and ask them where the lines go. Don't let them try and sell you anything. :thumbsup:

 

You should post up what you find out. I am sure you are not the only person to ever run into this. :thumbsup:

[Ruko]

The power valves use exhaust pressure to open them. The exhaust gas pushes agaisnt a plunger inside, so the higher the rpm the more pressure there is so they will open more. There are what look like two jets on the outside of the pv to let the air inside out when the plunger moves. The hoses normally go onto them and then just run them down under the engine somewhere. The other end is left open. If you do a lot of low rpm riding you will get some black goo coming out of those jets, the hoses are there to run it down under the engine so it dripps on the ground and doesn't get all over the front of the engine. I have never heard of running the hoses back into the intake... that might be a good idea but I'm not sure. The goo that comes out is unburned oil and fuel so if you run it back into the intake it should just reburn it. That would be much cleaner and enviromentally friendly I guess. I'm not sure if that would do anything to the way the power valve works though... but you would be adding a vaccum to the hose so it would probably have some affect, :ermm: If anything I would guess it would make the valves open sooner so drag guys might like that. I would be interested to know if anyone else has ever done this.

[Handyman]

My powervalves have no drilling done to them. The hoses coming off the jets are not routed back into any vacuum lines or any lines for that matter, they run down the frame and pointed down to let the unburned fuel/oil drip and not get all over the frame. Firehead might have his set up differently for his type of riding. I do a little recreational hillshooting and duning and let the engine push the powervalves up on it's own. If you have any real technical questions call trinity like firehead said and see what they say.

[FireHead]

My powervalves have no drilling done to them. The hoses coming off the jets are not routed back into any vacuum lines or any lines for that matter, they run down the frame and pointed down to let the unburned fuel/oil drip and not get all over the frame. Firehead might have his set up differently for his type of riding. I do a little recreational hillshooting and duning and let the engine push the powervalves up on it's own. If you have any real technical questions call trinity like firehead said and see what they say.

 

I suppose it skipped over the part where I should have asked what type of powervalves that he has. There have been a couple different style put on Cheetahs. The type that open with exhaust pressure look more like what you would find on a T-Rex cylinder. The valves that open with engine vacuum are all that is being put on any new Cheetahs, including the DM cylinders.

 

I actually didn't know the valves that open with exhaust pressure had lines that came off them. I have never seen anyone actually using them may be a better way to put it.

 

If you don't know what you have try starting the engine. If the bike runs like crap and falls on it's face at any speed higher than idle, then you have vacuum operated valves. The Cheetah engine I had was used very similairly to the way Handyman uses his it sounds like.

[vainavic]

I have the stage four powervalves, if that helps, please any information would be great. I tried to call trinity yesterday but either the phone just rang or it was busy

Edited March 24, 2007 by vainavic

[lonestar]

I have stageiv p.v. on my 535 trinity When I first got my motor I called jimmy at trinity thoes main jets no# 230 coming off the p.v are just for drain-age the black goo. He told me to connect vent line hose on them and point them down ward to drain under frame. He also said you should have some black-goo venting it's normal. If not you my have a problem. This is all that I know. Never heard anything over plantsand drilling your cylinders and venting it back into the intake track. I won't do it. If you deside to call trinity ask for jimmy or Harry no wone else. I haven't delt with trinity for some time now. Not sure if jimmy still works their. I heard that he quiet & then came back. Hope this helps

[bansheeseat$$]

I have the stage four powervalves, if that helps, please any information would be great. I tried to call trinity yesterday but either the phone just rang or it was busy

 

I have built a few cheetah P.V's and the stage IV power valves,You put hoses on the vents and run them down your frame to vent only.Do NOT hook them up via a vacuum source.If you need them to open sooner or later they make spring kits to to that.

[Speed freak]

I am also having some issue's with my 421cc cheetah power valve setup. I live in florida so I am at sea level ..got it all put together on thursday and was very dissapointed I am assuming that I need to correct the jetting or something can anyone give me a good starting jetting start point also how much tiiming advance I am only set at +2 right now

[FireHead]

I have the stage four powervalves, if that helps, please any information would be great. I tried to call trinity yesterday but either the phone just rang or it was busy

 

Someone told me that they are in the process of moving from there current location (next to a strip club) to a new one out in Rancho SomethingorOther. That maybe why you couldn't get ahold of them.

 

I have never owned a Trinity powervalve setup. Apparently these are quite different from what alot of people are running? I know alot of people wind up removing and blocking off the powervalves on Trinity purchased cylinders for what ever reason. :ermm:

[lonestar]

Someday i will buy the block offs just to try it to see the differance. I will report back on it. I will lose a little on my low-end but I can afford it with this motor. Way to much wheel spin. Tires Tires Tires

[glamisrat]

I was in Trinity a few days ago and yes they a in the process of moving to a new location.

James at Trinity recomends running clear tube available at the local hardwear store on the

power valves so that you can see that they are flowing and that the tubes are not cloged.

I have a Cheetah 400 PV with a clean-up port and 35mm pwk's trinity stage IV pipes and

DYNA ignition., and I run 158 mains at sea level. This may be a little rich but I had an over heating problem so I went as rich as I could and still run ok.

I have another question for you guys. I have 19cc domes with this setup.What should my compresion be? and what octain do I need to run at sea level? I have been running 111 but at the price I would like to run a little less babe 50/50 with pump 92 or ?