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 Post subject: benjamin classic mods.
PostPosted: Tue Dec 31, 2013 12:55 am 
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Joined: Tue Oct 29, 2013 9:03 pm
Posts: 10
Just finished installing the quest 1000 piston and spring.The piston is 1.815" shorter the the stock one.The spring is 3/16" longer and the wire dia is .005" bigger.So giving that it had 1.875" stroke new it now has a piston stroke of 3.690". A lot more air volume to push the pellet.When i bought it i was getting around 440fps im guessing. Bought a chrony and I did my own mods [[ cut 1" off the piston adding 1" of stroke,and added 3/8 " spacer behind spring ,, this increased the fps to 640.Today i installed the quest 1000 piston and spring and im getting 710 fps.I'm using .22 cal crosman hollow point ,14.3 grain pellets and at 710 fps that gives me 16 footpound of muzzle energy.I'm happy with these results. Any guestions feel free to ask.


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 Post subject: benjamin classic mods.
PostPosted: Fri Jan 03, 2014 9:13 am 
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Joined: Fri Jan 03, 2014 9:07 am
Posts: 1
Did you tried to block the bleed hole in the piston? I am wondering how much fps you could gain with that thing blocked plus your mod!?


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