TM P90 - Hurricaine Tune-up 120 - 350 fps?

[|2acerX|]

Hey guys,

Just recently got a
HurricanE Tune-up Kit for P90 M120S.....
It is installed, seems to shoot right...

but when i did a chrono for my gun i got 350fps....
i did my brother's gun who doesn't have any major upgrades...
(TM G36C) and he gets 350 fps as well

do i have a leak somewhere? and if soo any one know where it most likely is?


http://www.redwolfairsoft.com/redwol...l?prodID=18382

thanks in advanced

[m102404]

The G36c and the P90 have the same 247mm-ish barrel...

M4's have a barrel in the 370-400mm range.

With a M120 in a M4 you end up with high390-420fps depending on a bunch of different factors...

Same setup with a 247mm barrel nets you just around 350fps...

So, it sounds like it's working just fine.

It's been a while since I ran those numbers in different builds...so I might be off a bit. Short story is...your short barrel is the cause of a lower than expected FPS.

It's not the size...it's how well you use it...

[cbcsteve]

3 Reasons for Air lose

1. Piston head is not screwed on tight enough
2. Air seal has O-rings that were not lubed enough
3. O rings are busted or have a slight knick
4. The Spring was not put in right (Irregular part on the spring guide)

[The Saint]

Is that cylinder ported? Can't tell from the picture. A 247mm barrel should be running with a ~3/4 ported cylinder, not an unported cylinder.

[Gsr_2000]

it's not ported i think