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Old 03-19-2007, 04:44 PM   #1 (permalink)
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ram/qev ???

I picked up this 05 prostock in a deal.
The less than cranial gifted person that originally owned it, drill out the ram to install a QEV. (and destroyed it)
I picked up an extra ram with QEV to replace the damaged stock. (as part of the deal)
My question is...what exactly does the QEV do/work and how do I hook this one up with the pneumatics.
Do i need the qev that is on the end of this ram or is it extra.
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Old 03-19-2007, 04:48 PM   #2 (permalink)
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QEV's allow gas to escape quicker after they have finished what they are doing (in this case pushing the ram one way or another). You want both qev's- basically this will relieve the pressure behind the ram when the ram is pushing from the opposite direction- allowing you to get more cycles per second. As for hooking it up- you hook it up just like the standard ram was- most guys face the qev's towards each other and run their hoses from there (the one should nearly double back on itself)
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Old 03-19-2007, 05:00 PM   #3 (permalink)
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IN slightly less laymans terms

The QEV vents the pressure behind the ram after it pushes the ram to cock the bolt/hammer so that there is no pressure acting on the ram in the opening direction when the pressure acts on the ram to close it... and then the reverse happens. Basically it's a valve that opens when no pressure is acting on it from the input in side.

Very nifty little buggers

Some people say that you really on ly need the one on the input in of the ram (the one sticking off the end)

E
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Old 03-19-2007, 05:34 PM   #4 (permalink)
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I agree with the 1 qev thing.. they can make timing a bit more touchy, or at least make it easier to shortstroke with both of them on there and a non e-grip.
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Old 03-19-2007, 06:11 PM   #5 (permalink)
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QEV

Quick
Exhaust
Valve


you can just attach pneumatic hosing to the barbs... it (as stated above) just makes timing slightly more touchy
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Old 03-19-2007, 07:28 PM   #6 (permalink)
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OK.
I think what confused me is the fact that the ram on the gun didn't have a barb on the end.
I very quickly looked at the diagram and missed the end connection.
Looking at the other cocker and the diagram again helped clear the brain fart.
I'll put it on and see how it works.
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