FPS Issue

[Cody C.]

Ok so here's the rundown. I upgraded my KWA CQB to shoot harder. Ive done tons of mods and have many hours spent tuning and tinkering but my FPS sucks.

I chronoed it with a Brand New GUARDER SP150 and it shoots 355 FPS. It's 352-355 extremely consistently, but shouldn't it be shooting harder with an SP150?
The air seal is good through the air nozzle but I feel I'm losing FPS somewhere. I have a cylinder with slightly less than a Mid-cylinder port and a 363mm prommy barrel.

I am using the stock KWA 2GX bucking, Flat hopped. Also, the hop unit is split version design. Should I modify the body to fit a one piece hop up and then use a Madbull bucking?
This would get me more FPS but would this get me to 500FPS?

What I really want to know is if 355 FPS is par for the course on a SP150 and a 363mm barrel.

[Star_folder]

Try using a different cylinder. Also, what bbs are you chronoing with?

[Cody C.]

I'm using .25's. What kind of porting if any do you reccomend?

[Star_folder]

Anything less than what you've got now. That CQB has some really, really, really deep ports. Way more than it needs. A Type 2 should sufficiently volume a 363mm barrel. My guess is that you're system is very under volumed, and it's really killing the fps output.

[Villid]

I have the same gun and did the same thing. All I changed was the cylinder and got up to around 375 with .25s. I'll see if I can find a pic of the one I used.

[Cody C.]

so should I go with a full volume cylinder or go with something like this? http://www.airsoftgi.com/product_info.p ... s_id=10004

[Villid]

Something like the link. The one I used had a larger port than thay

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