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Old 01-25-2009, 06:47 PM #1
Join Date: Dec 2008
Bt Erc 4

cronoed my gun and it was at 144fps .. i adjusted the scew out until it almost fell out and it only went to 244 ... i was on HPA with good pressure .. the only mod is the polished insides and i was useing a remote ...there was a brand new BT ERC 4 and his gun was shooting slow fps to!!! Do i need a different spring ?
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Old 01-26-2009, 08:39 AM #2
Join Date: Aug 2008
yep u need a standard black spring the newer ones because of some european fps laws are coming with shorter springs
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Old 01-26-2009, 04:02 PM #3
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The remote may be bottoming out and cutting off your air to the gun. There is a mod where you concave the front part of the part the screws into the asa. Feyd.........

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Old 01-26-2009, 08:22 PM #4
Join Date: Dec 2008
tried it with and without the remote ..same fps , I ordered spring kit
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Old 03-16-2009, 09:26 PM #5
Join Date: Jan 2009
i like the red spring, its the heaviest and if you shoot fast it will give you the best performance.
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Old 03-17-2009, 12:07 PM #6
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Are you using a high pressure HPA tank?

Also the possibility that the asa could also be starving the marker.

Last edited by Whiteyboy : 03-17-2009 at 12:11 PM.
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Old 03-18-2009, 11:55 AM #7
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Join Date: Dec 2007
be carful tho, dont use too heavy, the heavier the spring the lower your efficency, for best results use the lightest spring possible, only use a heavier spring if you absolutly have to.
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