FPE from CR600W |
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GOODold308
Groupie Joined: 27 Aug 2024 Location: Napier Status: Offline Posts: 23 |
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Posted: 31 Aug 2024 at 3:33pm |
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
Senior Member Joined: 13 Jun 2020 Location: Ashburton Status: Offline Posts: 862 |
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I'm getting 565fps average from my cr600, modified valve, ports and bulk filled
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Billbobnz
Senior Member Joined: 13 Jun 2020 Location: Ashburton Status: Offline Posts: 862 |
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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
Senior Member Joined: 02 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2226 |
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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
Groupie Joined: 27 Aug 2024 Location: Napier Status: Offline Posts: 23 |
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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
Senior Member Joined: 02 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2226 |
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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
Groupie Joined: 27 Aug 2024 Location: Napier Status: Offline Posts: 23 |
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😂 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
Groupie Joined: 27 Aug 2024 Location: Napier Status: Offline Posts: 23 |
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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
Senior Member Joined: 02 Jul 2022 Location: Hastings 4 now Status: Offline Posts: 2226 |
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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
Senior Member Joined: 24 Apr 2020 Location: Stratford Status: Offline Posts: 262 |
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CO2 warning from Crosman. Do Not Expose to Heat or Store Above 48.9 degrees. |
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