Where is my air leak?

[incrediboy729]

Hello. I recently installed some parts on my CA m4. Here is the list:
G&P m160 motor
G&G super torque helicals
12v elite mini battery with deans
ARES double o-ring cylinder head
Prometheus POM NEO piston head
Systema area 1000 spring guide
King arms m150 spring
Systema bucking
CA tightbore
My fps is VERY low for an m150. I cannot punch through the bottom of a coke can. Through the sides, yes, but not the bottom. A compression test with the cylinder, cylinder head, piston, and piston head gives no leakage. However adding the air nozzle and putting my finger over the hole gives much air leakage. So is the problem my nozzle? Where is my air going??? Haha.
Thank you so much for your time.
-Brett

And just for reference, I'm not a gamer, in case you were scared of me using an m150 on a person

[Styrak]

If air is leaking out your nozzle, then yes, it's your nozzle

[chaosnemesis]

it just sounds like your air nozzle doesn't match well with your cylinder head. if it's worn or tolerance is off it will leak out the base of the nozzle. Some nozzles have an o-ring or even two for a better seal, you might look into these. but you really should stick to one company for better compatibility.

[Thenooblord]

I agree, get an Oring nozzle, but i must ask, why do you need an M150 spring? thats way overkill

[Blackthorne]

I was about to order the o-ring nozzle for my M4s but I can't seem to get to airsoftparts.ca? Can anyone else get to it?

[Primus]

down for me too

[Blackthorne]

Crap.

Anyway...on topic. Yes, you are having the same leakage that I am having and it's normal with a stock nozzle.

Get a nozzle with an o-ring inside and you should solve the problem. Tha'ts what I am going to do anyway.

[incrediboy729]

If air is leaking out your nozzle, then yes, it's your nozzle

Well, I wasn't sure exactly how to compression test a nozzle. Being the tapplet plate moves it into a different position before the air gets released, I wasn't sure if simply pushing it against the cylinder head was the right thing to do to test for air leakage. But thank you for your help.

it just sounds like your air nozzle doesn't match well with your cylinder head. if it's worn or tolerance is off it will leak out the base of the nozzle. Some nozzles have an o-ring or even two for a better seal, you might look into these. but you really should stick to one company for better compatibility.

Thank you. I was looking at those, and i'll get one ASAP.

I agree, get an Oring nozzle, but i must ask, why do you need an M150 spring? thats way overkill

Like i said, I am a plinker not a gamer. I am willing to put the money, time, and upgrades into running an m150. Even if I did decide to game, i can switch out the spring in a half hour.

I have had this problem before, and I assumed i (and everyone else on here also thought) the piston head and cylinder head were to blame. My CA has been down for quite some time now, and I really want to solve the problem. Heck, if it isn't the nozzle, i don't know what i am going to do. Thats the last stock part in my gearbox. Then i am really screwed.