Airsoft Canada
https://blackblitzairsoft.myshopify.com/

Go Back   Airsoft Canada > Discussion > Upgrades & Modifications
Home Forums Register Gallery FAQ Calendar
Retailers Community News/Info International Retailers IRC Today's Posts

Spring Comparison Chart - Updated April 1st, 2006

:

Upgrades & Modifications

Reply
 
Thread Tools
Old August 27th, 2004, 15:13   #31
ILLusion
GBB Whisperer
 
ILLusion's Avatar
 
Join Date: Jun 2002
Location: Toronto
I'm considering getting my hands on a brand new PDI 170% just so I can test it out on my platform... the last time I worked with one, it was putting out close to 430fps. Although I don't want to buy one just to test since I know I'll have a hell of a time trying to sell it.

The materials between the 170% and 150% must be different, hence the different lengths.
ILLusion is offline   Reply With Quote
Old February 12th, 2005, 18:45   #32
Droc
Guest
Ok, so im getting confused with all this.
Im stock right now...SR16, but I have a set of systema super torque up gears comming, systema reinforced piston, systema steel bushing, and systema piston head...All these were spares a friend of mine has, so Im not picking and choosing.

I don't wanna blow my mechbox, so whats the most powerful spring I install and stay safe...while getting as many FPS as possible....
  Reply With Quote
Old February 12th, 2005, 19:19   #33
bruce
Super Moderator
 
bruce's Avatar
 
Join Date: Aug 2003
Location: Montreal
Send a message via ICQ to bruce Send a message via MSN to bruce
Quote:
Originally Posted by Droc

I don't wanna blow my mechbox, so whats the most powerful spring I install and stay safe...while getting as many FPS as possible....
If you want to play with the guys at the LZ and PQAC, you'll have to limit your fps to 400. Use a PDI 150% max. I'm using it with a TN barrel and it'll be very close to 400fps or slightly over.
__________________
bruce: Team Bad Karma-(BK-05)
: Special Battalion East-(SBE-01)
bruce is offline   Reply With Quote
Old February 12th, 2005, 19:48   #34
Droc
Guest
my only concern is that my finds wont allow for a reinforced mechbox for awhile yet....so keeping FPS high, without blowing the mechbox
  Reply With Quote
Old February 12th, 2005, 21:06   #35
bruce
Super Moderator
 
bruce's Avatar
 
Join Date: Aug 2003
Location: Montreal
Send a message via ICQ to bruce Send a message via MSN to bruce
That's the gamble we all take when it comes to the Version2 mechboxes my friend. Especially if we play in the winter with an upgraded spring. A M120S will for sure crack your mechbox in the winter. I've crack a Progear and a Systema one already.

I'll go with a Top Power 150%, PDI 140% or a M100 spring to be safer. I hear Top Power springs are better for the mechboxes but I gave mine to Vondnik before I could use it.
__________________
bruce: Team Bad Karma-(BK-05)
: Special Battalion East-(SBE-01)
bruce is offline   Reply With Quote
Old February 13th, 2005, 00:55   #36
vondnik
Ban-Fu Sifu
 
vondnik's Avatar
 
Join Date: Nov 2002
Location: Socialist republic of Kebekistan
Send a message via MSN to vondnik
Quote:
Originally Posted by bruce
I hear Top Power springs are better for the mechboxes but I gave mine to Vondnik before I could use it.
ANd he loves it over any other spring he ever installed in any guns... Now the only catch is finding more of them damn it...
__________________
Vondnik, team Bad Karma, PQAC

Murphy's second rule: Nothing is impossible for the man who does not have to do it himself.

vondnik is offline   Reply With Quote
Old March 16th, 2005, 22:21   #37
ILLusion
GBB Whisperer
 
ILLusion's Avatar
 
Join Date: Jun 2002
Location: Toronto
Quote:
Originally Posted by vondnik
ANd he loves it over any other spring he ever installed in any guns... Now the only catch is finding more of them damn it...
You might want to consider KM/Head 1950 springs... they're short and "feel soft" like Top Power springs as well. They don't hold their initial velocity too well, but once settled in, they're damn consistent. In my tests, they were more consistent than Top Power springs.

That's why I have a couple of them on the way...
ILLusion is offline   Reply With Quote
Old March 17th, 2005, 08:30   #38
CDN_Stalker
Official ASC Bladesmith
 
CDN_Stalker's Avatar
 
Join Date: Jul 2003
Location: Ottawa, Ont.
Send a message via MSN to CDN_Stalker
The PDI 150% in my MP5 shoots roughly around 340fps. I know, I chronied a number of shots. Doubt a tightbore would knock the fps that much (as said above). And Apoc has a PDI 170% spring in his SR-16, and it's only sitting around 360-370fps. Will be up a bit more soon, as I'm installing a bearing spring guide this weekend.

I'll vouch on the length difference between the PDI 150 and 170 springs. Couldn't figure out why the 170 was shorter. I'll just say that the 170 is easier to compress and hold to get the mechbox back together.
CDN_Stalker is offline   Reply With Quote
Old March 31st, 2005, 16:03   #39
ILLusion
GBB Whisperer
 
ILLusion's Avatar
 
Join Date: Jun 2002
Location: Toronto
That's incredibly low... 340fps with a PDI 150% and 360-370fps with a 170%??

Can I ask what chronograph you are using? And is it optical or radar? Optical chronies are much more accurate and radar's usually have difficulty picking up BBs or give results that are too low or too high.

The length differences between the PDI 150 and 170 can be attributed to different materials used. A softer steel is used for the 150, but a greater length must be attributed to get it to perform where PDI wants it to perform. That material is used because there is no ecconomical grade of steel between what's used in the 150 and the 170.
ILLusion is offline   Reply With Quote
Old April 3rd, 2005, 17:44   #40
Prowler
 
Prowler's Avatar
 
Join Date: Feb 2004
Location: Surrey, BC
Send a message via ICQ to Prowler Send a message via AIM to Prowler
With my MP5 I used an M120 spring and was shooting around 440-450fps with some shots as low as 403. My mp5 is since retired and am looking at getting a good spring for 390 fps.
__________________
Prowler is offline   Reply With Quote
Old April 3rd, 2005, 17:47   #41
scott_
Banned
 
Join Date: Dec 2004
Location: Mississauga
Send a message via MSN to scott_
PDI 150 should do you well.
scott_ is offline   Reply With Quote
Old August 16th, 2005, 12:37   #42
mashymre
 
Join Date: Mar 2005
my g3 with pdi 140% spring installed shoots at about 385fps
mashymre is offline   Reply With Quote
Old August 16th, 2005, 16:28   #43
ILLusion
GBB Whisperer
 
ILLusion's Avatar
 
Join Date: Jun 2002
Location: Toronto
What's your spring guide, piston head and inner barrel?
ILLusion is offline   Reply With Quote
Old August 20th, 2005, 03:01   #44
mashymre
 
Join Date: Mar 2005
origional piston head with 4 small holes. origional barrel
hurricane bearing spring guide
mashymre is offline   Reply With Quote
Old August 22nd, 2005, 03:34   #45
ILLusion
GBB Whisperer
 
ILLusion's Avatar
 
Join Date: Jun 2002
Location: Toronto
the nut on the original piston head compresses the spring more - putting more preload on it, and giving it a higher output. Its height is almost double that of the bearings on the piston head I used for testing the springs in my spring chart.

As well, the chart is not here to tell you exactly what velocity you will get exactly with what springs. It's there so that you can compare springs against other springs as well as to give you a *general* idea of what velocity to expect with a particular spring.

The Airsoft manufacturing process is not consistent enough to allow another P90 upgraded with the exact same parts I used to output exactly the same velocity. The chances of that happening are pretty slim, given all the variables.
ILLusion is offline   Reply With Quote
ReplyTop


Go Back   Airsoft Canada > Discussion > Upgrades & Modifications

Bookmarks

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Airsoft Canada
https://blackblitzairsoft.myshopify.com/

All times are GMT -4. The time now is 19:57.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.