G&G GR-16 R-4 (Plastic Edition)

Well here is one example, That motor you specified is 25000 rpm's, which handles the stock spring fine, This systema motor spins at 30,000 to 35000 rpm's, and matrix motors claim to outperform systema. I know this was just one example, but I can prove the same thing with the other parts, putting in a stronger spring, will most likely be the wrong decision.

but those motors are for high speed and i'm looking for torque

No its not here is the link, http://www.airsplat.com/Items/AC-UPI-SY-MLST.htm.

This same motor is available at evike. Read it Systema motor long type torque magnum.

link doen't work
and i think i seen the chart you were trying to link... and it doesn't say anything about G&G motors or what size spring each motor can pull.

I am not just talking about the motor, like I said, the whole gearbox should be checked before attempting to put in that spring. I would not chance it.

what spring were you looking to put in, to start.

kkoerber u know that the g&g is a sportline...
Which means that its probly "upgraded to shoot like a stock g&g professional series
So ask yourself the same question
"would i put a bigger spring in a stock rifle without doing anything to reinforce it?"
and of course your answer will be no, im with DJ on this one...