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Spring Comparison Chart - Updated April 1st, 2006

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Old March 27th, 2004, 20:20   #16
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Brian, did you ever manage to get the info on the PDI 170% all squared away? Inquiring minds want to know.... :roll:
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Old March 27th, 2004, 23:22   #17
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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.
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Old March 29th, 2004, 22:40   #18
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The chart has now been added. Three more springs added: PDI 170%, M100 and KM 140M.
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Old March 29th, 2004, 23:49   #19
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Thank you
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Old April 22nd, 2004, 22:01   #20
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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.
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Old April 22nd, 2004, 23:31   #21
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Quote:
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~
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Old April 23rd, 2004, 00:50   #22
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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.
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Old June 15th, 2004, 12:48   #23
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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.
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Old June 15th, 2004, 13:07   #24
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Quote:
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.

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Old June 15th, 2004, 14:49   #25
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Taken directly from the spring chart:
http://www.airsoftcanada.com/SpringChart.html

Quote:
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: 24.54ยบ C
Hop Up: KM Triple Camber RH 55 set OFF
Note the last item.
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Old June 15th, 2004, 16:09   #26
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ok - great, sorry then i didn't see that.
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Old June 22nd, 2004, 02:18   #27
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so helpful
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Old July 27th, 2004, 17:50   #28
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This invaluable spring guide is missing!
must have been misplaced with the upgrade.
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Old July 27th, 2004, 17:59   #29
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it did.

i will have it online tonight.
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Old August 27th, 2004, 00:38   #30
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Quote:
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%.
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