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Discussion Starter · #1 · (Edited)
***Contributions to this thread are appreciated, and you will be credited for your data!***

Since most of the guns in this section will be born from an AEG... Most of the guns will have a gearbox. I'll start by saying I have always had some problems distinguishing FPS differences between springs across all of the companies.

A lot of factors can add into the FPS output of a spring such as compression, cylinder volume vs barrel length vs bore size, proper seals, piston weight and etc etc.

I found some good information here I am pulling from an archive on my home site C3. The data was originally mined from Amplified Airsoft. The list here should give you a rough estimate of what FPS a spring will give you if you are running stock internals.

Be warned of course... Running stock internals with a Guarder SP170 will strip your teeth pretty quick. But, if you've dealt with gearboxes for long enough, you should already know that =)

Again...THIS IS NOT ALL OF MY OWN DATA. I have found it to conform with most of my applications pretty closely, but either way, use it wisely. I am not responsible for your day getting ruined when you're 5 FPS over the field limit and don't have a backup!:bird:

To the best of my knowledge, I can only conclude from researching that this is advertised/marketing data provided by manufaturers.

---- Systema Springs ----

Systema Spring M90
- 290 fps to 300 fps .20g BBs varies by AEG.

Systema Spring M100
- 340 fps to 360 fps .20g BBs varies by AEG.

Systema Spring M120
- 395 fps to 405 fps .20g BBs varies by AEG.

Systema Spring M130
- 420 to 430fps .20g BBs varies by AEG.

Systema Spring M140
- 450 to 460fps .20g BBs varies by AEG.

Systema Spring M150
- 470 to 490fps .20g BBs varies by AEG.

Systema Spring M160
- 500 to 550fps .20g BBs varies by AEG.

---- Prometheus Springs ----

Prometheus Spring MS 110
- 340 fps to 350 fps with .20 BB's varies by AEG.

Prometheus Spring MS 135
- 380 fps to 390 fps with .20g BB's varies by AEG.

Prometheus Spring MS 150
- 390 fps to 420 fps .20g BBs varies by AEG.

---- PDI Springs ----

PDI Spring PDI 100%
- 290 fps to 300 fps .20g BBs varies by AEG.

PDI Spring PDI 120%
- 320 fps to 330 fps .20g BBs varies by AEG.

PDI Spring PDI 140%
- Estimated performance a Systema M100.

PDI Spring PDI 150%
- 350 fps to 360 fps .20g BBs varies by AEG.

PDI Spring PDI 170%
- 385 fps to 405 fps .20g BBs varies by AEG.

PDI Spring PDI 210%
- 420 fps to 430 fps .20g BBs varies by AEG.

PDI Spring PDI 240%
- 350 fps to 460 fps .20g BBs varies by AEG.

PDI Spring PDI 270%
- 480 fps to 490 fps .20g BBs varies by AEG.

PDI Spring PDI 300%
- 520 fps to 530 fps .20g BBs varies by AEG.

---- Guarder Springs ----

Guarder Spring SP90
- 280 fps to 290 fps .20g BBs varies by AEG.

Guarder Spring SP100
- 320 fps to 330 fps .20g BBs varies by AEG.

Guarder Spring SP110
- 350 fps to 360 fps .20g BBs varies by AEG.

Guarder Spring SP120
- 380 fps to 390 fps .20g BBs varies by AEG.

Guarder Spring SP130
- 415 fps to 425 fps .20g BBs varies by AEG.

Guarder Spring SP140
- 450 fps to 460 fps .20g BBs varies by AEG.

Guarder Spring SP150
- 480 fps to 490 fps .20g BBs varies by AEG.

Guarder Spring SP160
- 520 fps to 530 fps .20g BBs varies by AEG.

Guarder Spring SP170
- 540 fps to 550 fps .20g BBs varies by AEG.

---- CA Springs ----

* Classic Army Spring PDIx 170% Advanced Power
* Classic Army's version of the PDI 170%.
* Expected performance 10 points stronger or similar to Systema M120.

**** Test Run Indexes ****

All data is measured with .20g BB's. Sizes can range from 5.95mm-6.00mm, and barrel bore sizes/lengths will be provided when available.

ATTENTION! BOLD TEXT DATA IS PROVIDED BY A USER ON ASF

Matrix
M90 = 328 (timmah w/ 300mm TK twist barrel)

ICS
M100 = 330-370 (Killer w/ 363 extended block ICS m4)

Element
M165 = 560 (Hallos w/ 509mm TBB Dboys M4)

CA
M100 = 320-330 (Killer w/ 363mm M4)

SHS
S130 = 380 (Aoi Jun w/ 509mm JG AUG)

Prometheus
MS90SP = 310

MS100SP = 340

PDI
120% = 330

130% = 370

PDI
100% = 295

120% = 327

150% = 360

170% = 380

190% = 390-405

210% = 425

240% = 457

270% = 490

300% = 530

Guarder
SP85 = 310, 298 (TheTJ w/ 385mm TBB APS UAR)

SP90 = 290, 340, 333 (TheTJ w/ 385mm TBB APS UAR)

SP100 = 330, 390, 373 (TheTJ w/ 385mm TBB APS UAR)

SP110 = 360, 405, 365 (Hallos w/ 363mm TBB Dboys M4)

SP120 = 390, 420, 380 (Aoi Jun w/ 509mm JG AUG), 420 (Aoi Jun w/ 363mm JG M4) 425 (TheTJ w/ 509mm TBB JG G3), *412 and 426 (Hallos w/ 363mm TBB Dboys M4, *varying setup), 428 (TheTJ w/ 385mm TBB APS UAR)

SP130 = 425, 430, 420 (Aoi Jun w/ 509mm JG AUG), 460 (Aoi Jun w/ 363mm JG M4)

SP140 = 460

SP150 = 490, 570 (TheTJ w/ 509mm TBB JG G3)

SP160 = 523

SP170 = 550
 

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Discussion Starter · #5 · (Edited)
Adding to the list. That's funny that the guarder sp120 worked that way for you. For my v2 gearbox it was actually pushing 430 fps! I had to cut two and a half coils off to keep it 400 or below for my field limit. I feel like the data that I mined is split by gearbox types, as it seems.
 

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Brief list of some test results

Hi everyone!

First of all, i'm a recently inciated airsoft player... so don't expect much...this 1st post is just to give some test results i got on my mod's...

All of this have been chronoed with an UFC Pro chronograph...

The gun is a low cost Dboys M4 SD (modified to M4a1 version) with stock torque gears...
Motor - BIG DRAGON M140 Ultra Custom Motor
Piston - ICS 7 teeth metal
Piston Head - Stock
Piston Head Ring - X-Ring
All parts (Mech/Air Seal) lubbed with Super Lube, PTFE lube...

RESULTS:

JBU 363mm Barrel - 6.03mm
Guarder SP120 + Prometheus Soft Bucking - 426 [email protected]
Guarder SP120 + Stock Bucking + Teflon tape - 412 [email protected]
Guarder SP110 + Stock Bucking + Teflon tape - 365 [email protected]

Prometheus 509mm Barrel - 6.03mm
Element M165 + ICS Bucking + Teflon - 560 [email protected]

All this tests have been conducted in order to start a DMR build.... and the 1st conclusion... for myself... M140 should be enough... for the intended role!

Hope you enjoy...
 

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Adding to the list. That's funny that the guarder sp120 worked that way for you. For my v2 gearbox it was actually pushing 430 fps! I had to cut two and a half coils off to keep it 400 or below for my field limit. I feel like the data that I mined is split by gearbox types, as it seems.
Well, I also found it funny. A friend of mine use the same spring and got this result.

Guarder SP120 420fps
Guarder SP130 460fps

All this using JG M4A1 363mm inner barrel.

We believe it's because of the quality of air seal and different inner barrel diameter and lenght.
 

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Discussion Starter · #10 ·
Hi everyone!

First of all, i'm a recently inciated airsoft player... so don't expect much...this 1st post is just to give some test results i got on my mod's...

All of this have been chronoed with an UFC Pro chronograph...

The gun is a low cost Dboys M4 SD (modified to M4a1 version) with stock torque gears...
Motor - BIG DRAGON M140 Ultra Custom Motor
Piston - ICS 7 teeth metal
Piston Head - Stock
Piston Head Ring - X-Ring
All parts (Mech/Air Seal) lubbed with Super Lube, PTFE lube...

RESULTS:

JBU 363mm Barrel - 6.03mm
Guarder SP120 + Prometheus Soft Bucking - 426 [email protected]
Guarder SP120 + Stock Bucking + Teflon tape - 412 [email protected]
Guarder SP110 + Stock Bucking + Teflon tape - 365 [email protected]

Prometheus 509mm Barrel - 6.03mm
Element M165 + ICS Bucking + Teflon - 560 [email protected]

All this tests have been conducted in order to start a DMR build.... and the 1st conclusion... for myself... M140 should be enough... for the intended role!

Hope you enjoy...
Great information Hallos, thank you. Just be sure to post an introduction post on the new member section of the forum. I'll add your information to the chart.
 

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Discussion Starter · #11 · (Edited)
Just purchased a new APS UAR which will allow me to quickly check FPS ratings of just about any spring... So I grabbed the entire Guarder family of springs up to the SP120. I'm still waiting on an SP110 but I will post my results from the SP85, SP90, SP100, and SP120 right now. I'll be the first to say that the SP120 slowed down the gearing in the box, so I don't plan to be using it in the gun regularly. Either way, check above for details!

Note: All of my FPS tests were done on a stock setup in this gun! :tup:
 

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Discussion Starter · #13 ·
Typo on the guarder M170 spring.

Guarder Spring SP150
- 480 fps to 390 fps .20g BBs varies by AEG.
That's mined data so I never really bothered to filter through it. Thanks!
 

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Discussion Starter · #15 ·
Yeah I know the physics behind it. I'm more looking for hard evidence, i.e. chronographs and etc. Also, some springs are not measured the same way like PDI's, or they may not have the same irregular pitch as the next spring... Or whatnot.
 

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Discussion Starter · #19 ·
I wasn't under the impression that systema made any other kinds of springs. If it's not bold, it's not proven by someone on ASF. That means it's just data I mined from another site. Take it for what it's worth.
 

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Just realized this was out there... Want to add Matrix M90 (1J spring) + 300mm TK twist barrel = 328 (+/- 2 fps) Was placed in a CA 8mm gearbox (not sure if that matters). Madbull Ultimate hopup, with the blue bucking was also used (again, not sure if it matters or not)
 
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