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

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.

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

Thank you :)

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~

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.

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

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

Note the last item.

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

so helpful

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

it did.

i will have it online tonight.

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%.