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FPE from CR600W
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GOODold308 View Drop Down
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    Posted: 01 Sep 2024 at 10:33am
Hi guys what is the average FPE or FPS you get out of a modified cr600? I am trying to work out a plenum size and from my research it is recommended to have 1cc per FPE.

I know co2 gas pressure can change a lot but if I can make the plenum a bit bigger it should hopefully help when the pressure is on the low side.
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Billbobnz View Drop Down
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Posts: 882 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2024 at 2:33am
I'm getting 565fps average from my cr600, modified valve, ports and bulk filled
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Billbobnz View Drop Down
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565fps is with JSB Stratton Jumbos 15.89 grn pellets. These preform the most accurate through the gun.
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kruzaroad View Drop Down
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It's a sweet little gun too bb. I rather liked it. Was expecting it to be heavier but it's still preety light.
308, there was some one talking earlier in the year about putting a heating pad around the co2 bottle to control the temp veriation.
What happened with that idea and if it became part of build I have no idea.
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GOODold308 View Drop Down
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Posts: 23 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GOODold308 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2024 at 7:07am
Billbobnz thanks for that it will help me figure out the plenum I will make it a bit bigger as I like to run heavier pellets.

kruzaroad it is a very nice little gun I was quite surprised at the weight too.

The bottle heater is a good idea not sure what could be use as it will need some kind of thermistor to regulate the heating element but I'm sure someone with knowledge of electronics could easily make an insulated sock with heater using a lithium battery or something, it would be greate for night shooting.
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kruzaroad View Drop Down
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Posts: 2492 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2024 at 7:14am
I'm a bit more primitive than that.
I'd just put a couple of the handwarmer packets I got around the cylinder. ( they are some sort of chemical reaction, not unlike the ones you get for heating those field meals the army has)
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GOODold308 View Drop Down
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Posts: 23 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GOODold308 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2024 at 7:17am
😂 that primitive idea is a pretty good one, I'm not sure how long they last but I know they get pretty warm. I think I'll pick some up from chemist wearhouse and see how they do.
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GOODold308 View Drop Down
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Posts: 23 		Post Options Post Options   Thanks (0) Thanks(0)   Quote GOODold308 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 2024 at 7:21am
Chemist warehouse do a body warmer too for cheap 😂 I'm liking this idea just need to find some pipe insulation now
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kruzaroad View Drop Down
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The hand ones go for hours, I'm assuming the body ones do too.
I'd check temps,diff temps for the different applications of them I guess.
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mercs View Drop Down
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CO2 warning from Crosman.
Do Not Expose to Heat or Store Above 48.9 degrees.
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