Spring Comparison Chart - Updated April 1st, 2006

[Skruface]

Brian, did you ever manage to get the info on the PDI 170% all squared away? Inquiring minds want to know.... :roll:

[ILLusion]

oh yeah... I actually have a PDI 170%, SystemA M100 and a KM 140M sitting beside me, just waiting to test. I haven't had much time for airsoft lately.=(

I will see if I can get it done on sunday.

[ILLusion]

The chart has now been added. Three more springs added: PDI 170%, M100 and KM 140M.

[Skruface]

Thank you

[ILLusion]

I just upgraded a bone stock Tokyo Marui P90 TR.

In stock form, it was shooting 290fps.

I threw in a PDI 150%, Guarder metal bushings and nothing else and it was spitting out 410fps.

[SUPER BAD ASS SWEET DADDY JONES]

Originally Posted by ILLusion

I just upgraded a bone stock Tokyo Marui P90 TR.

In stock form, it was shooting 290fps.

I threw in a PDI 150%, Guarder metal bushings and nothing else and it was spitting out 410fps.

OMFGZ!

UPGRDAE MASTAR!!!11one~

[ILLusion]

It's not about upgrade mastery.

I just want people to be aware of what results they may get with certain upgrades.

To be honest, although my personal P90 has almost every part tricked-out, some of those parts actually lose velocity in an attempt to gain higher shot consistency.

So do not be surprised if a stock gun can shoot higher than a fully done up gun with the same spring.

[tomcat52002]

I have a question.
Maybe this has been asked before, but i did not see it.
While doing your testings, did you have the Hop-up on or off?
This would make a difference because it is noted that with Hop-up ON the fps is consistantly lower than with it off.
If this has been mentioned before sorry.

[Kedirkin]

Originally Posted by tomcat52002

I have a question.
Maybe this has been asked before, but i did not see it.
While doing your testings, did you have the Hop-up on or off?
This would make a difference because it is noted that with Hop-up ON the fps is consistantly lower than with it off.
If this has been mentioned before sorry.

Velocity measurements are typically made with the hop up turned off.

KD

[ILLusion]

Taken directly from the spring chart:
http://www.airsoftcanada.com/SpringChart.html

Originally Posted by Spring Chart

BB: Excel 0.20g
Piston: SystemA Red Polycarbonate Piston (modified)
Piston Head: SystemA Aluminum w/ Bearings
Cylinder Head: Prometheus
Cylinder: KM TN Taper
Nozzle: SystemA
Spring Guide: Prometheus v2 w/ Bearings
Inner Barrel SystemA 6.04mm BS (335mm)
Chronograph: Shooting Chrony F-1
Average Temperature: 24.54º C
Hop Up: KM Triple Camber RH 55 set OFF

Note the last item.

[tomcat52002]

ok - great, sorry then i didn't see that.

[socom1]

so helpful

[Gish]

This invaluable spring guide is missing!
must have been misplaced with the upgrade.

[ILLusion]

it did.

i will have it online tonight.

[lt_poncho]

Originally Posted by ILLusion

I just upgraded a bone stock Tokyo Marui P90 TR.

In stock form, it was shooting 290fps.

I threw in a PDI 150%, Guarder metal bushings and nothing else and it was spitting out 410fps.

I made the same mistake with the PDI 150% thinking it was less than the 170%. Im sure there's a good reason why it's longer than the 170%.