QUOTE(tjasean @ Jan 30 2010, 09:08 PM)
ooo...
if it's simple i might give it a try to tweak..
dun wanna spoil it though..
coz the problem is the shooting power..
i was wondering if it was the spring's problem..
any guide to improve the power?
If you are referring to your Furyfires, the issue is more due to the gap between the auto-rotating barrel and the spring plunger nozzle. This gap causes most of the air to escape outside when firing, so there is some room for improvement.
To improve the seal, you could get a rubber washer or o-ring and trim to attach between the auto-rotating barrel and the spring plunger nozzle, creating a tight seal, then apply some synthetic grease on the washer/o-ring to ensure that the barel can still rotate freely.
Nerf blasters have Air Restrictors (ARs) to cushion the plunger compression and protect the parts, but this also reduces air flow, therefore removing them will allow maximum air flow. But note that without the ARs to cushion the plunger impact, the sound when firing will be much louder and stress on the parts is higher, then padding will also need to be added to the plunger for protection.
Replacing or adding a stronger spring will accelerate the air compression, which increases the propelling power behind each shot, but also note that it will then require more strength to prime too.
All that being said, the results from modding blasters will depend on the blaster model too. Models like the Furyfire and Maverick naturally generate limited results from modding (due to their design) compared to blasters like the Longshot which have much more modding potential. See my next post for some explainations.
Btw, if you want to have an idea of how the modding process is like for Nerf blasters, do have a look at my Mod Works blog for various blaster mod guides:
http://www.modworks.blogspot.com