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pair system
by: dyoung1167 - Apr 17, 2013 16:34:25 GMT -5
Post by dyoung1167 on Apr 17, 2013 16:34:25 GMT -5
what is the easiest way to eliminate the pair system on the valve cover. can i just plug the port on the valve cover that i think is supposed to go to the exhaust or do i really need to put a plate over the lower left port on the head where the piping begins?
putting a new engine set up with a pair head and valve cover in a scoot that never had pair to begin with.
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pair system
by: jeffery5568 - Apr 17, 2013 16:57:32 GMT -5
Post by jeffery5568 on Apr 17, 2013 16:57:32 GMT -5
Rip it all out and make a block off plate out of a thin piece of metal using a dermal or something like that. Then you can throw everything away and plug the vacuum line off of the intake elbow. But it does not make any change in power you gain nothing from taking it off other than losing a few pounds of crap.
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pair system
by: alleyoop - Apr 17, 2013 17:06:53 GMT -5
Post by alleyoop on Apr 17, 2013 17:06:53 GMT -5
Block it off at on the head and take the pipeing off. Think about it to adjust your valves you need to take the valve cover off. If you leave the piping connected to the head and block it off by the valve attached to the Valve Cover the PIPING is in the way to pull the valve cover off.
Take the whole crap off.
Alleyoop
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pair system
by: jeffery5568 - Apr 17, 2013 17:16:05 GMT -5
Post by jeffery5568 on Apr 17, 2013 17:16:05 GMT -5
If you don't want to make a block off plate you could get some jb weld and fill the hole in the head. It just keeps exhaust from coming out.
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pair system
by: dyoung1167 - Apr 17, 2013 17:43:11 GMT -5
Post by dyoung1167 on Apr 17, 2013 17:43:11 GMT -5
i intend to remove it completely but do to an accident my drill and such is at work but i will have it tomorrow. can i get through a day just plugging the port off the valve cover?
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pair system
by: yelloscoot - Apr 17, 2013 21:36:04 GMT -5
Post by yelloscoot on Apr 17, 2013 21:36:04 GMT -5
Could look for a cover w/o the pair system.... For Ex: goo.gl/D5Bgc |
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pair system
by: Abscooters - Apr 18, 2013 12:21:36 GMT -5
Post by Abscooters on Apr 18, 2013 12:21:36 GMT -5
Could look for a cover w/o the pair system.... For Ex: goo.gl/D5BgcThat does not plug the hole on the head. You can just take that S-tube and cut, crimp and bend it over. That will get you by until you can make or buy a plate for it. |
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pair system
by: carasdad - Apr 18, 2013 12:30:46 GMT -5
Post by carasdad on Apr 18, 2013 12:30:46 GMT -5
Is it EGR or PAIR? PAIR sucks as they share vacuum with your fuel petcock. When my PAIR valve failed. Scoot would not run. I was getting no fuel. New petcock..still no fuel. On a whim I pinched the PAIR vac line off at the 'T' where it joins the intake vac line..sucked on the vac line and behold! Fuel flow. So I took the system off and replaced the 'T' connector with a straight nipple. Problem solved. If it is the vent line from your cylinder cover to the airbox...ya don't wanna block that off. That is to allow blow by to vent out.  |
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Post by millsc on Apr 18, 2013 13:13:31 GMT -5
Dont block the hose on the valve cover i did a job and it got kinked when i opened the oil screw i got a face full of hot oil  |
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pair system
by: Abscooters - Apr 18, 2013 16:13:30 GMT -5
Post by Abscooters on Apr 18, 2013 16:13:30 GMT -5
It is not a rubber hose, it is a steel tube that connects the exhaust port to the pair valve. Usually all steel (S shaped) to the pair valve on the valve cover but sometimes it is remote mounted pair valve and there is a heat resistant hose connected to the steel tube attached to the exhaust port.
millsc, you are talking about the vent hose at the top of the valve cover, and yes that must not be blocked or kinked.
And yes block off all vacuum lines that go to that emissions crap when removing it.
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pair system
by: alleyoop - Apr 18, 2013 16:42:08 GMT -5
Post by alleyoop on Apr 18, 2013 16:42:08 GMT -5
If you have this it is a PAIR System:  The Pair system is a one way VALVE, what it does is SUCK IN FRESH AIR that is all it does. If you notice the hose coming off the Pair Valve goes to a canister that has a Vacuum hose coming from usually a "T" or "Y" or right to a connector on the Right Side of the Intake Manifold and one hose from the CANISTER just hanging down loose(that is where it sucks in fresh air). If you have this it is a EGR System:  The EGR system is a one way VALVE, the Valve is welded onto the exhaust pipe and what it does is it send unburned exhaust gases back to be re-burned. Here again the hose from the EGR goes to a canister just like the PAIR system, has a Vacuum hose and a HOSE from the Canister going to your AIR INTAKE side of the CARB. If something goes south on this it will MELT the Canister. If you have a Canister like this you have a EVAP System:  The EVAP system is a VENT for the Gas Tank, the vent hose from the Tank goes to a Canister which also has a Vacuum line and a hose from the Canister back to the air box or tubing so the gas fumes go back into the intake again to be re-burned. What can happen with the EVAP is actual gas gets into the hose going to the canister and clog the charcoal in it and that will stop the venting of the gas tank. If that happens once the gas tank builds enough pressure it will not allow fuel to flow to out of the gas tank. All the above can cause lack of Vacuum to your fuel pump and or petcock if something goes south to cause the vacuum applied to the canisters to be open. Alleyoop |
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Post by joaoeu on Apr 19, 2013 20:28:06 GMT -5
Dont block the hose on the valve cover i did a job and it got kinked when i opened the oil screw i got a face full of hot oil Good to know. I was about to do that on my next motor that had the PAIR system. I love how certain valve heads have the shape to connect "EGR" valve covers, but it's completely blocked. It saves a lot of hassle from having to "blocking" it yourself. |
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..BAD TO THE BONE..
