Airsoft Canada - View Single Post - Can you tell a spring rating by looking at it?

Trev140_0 · May 23rd, 2014, 13:37

Here is what I do.

To give me a ball park.

Take a very long and thick screw driver
Then take the spring put it over the screwdriver and push the spring down till its totally compressed.Careful not to stab yourself.
Then take another spring and try it. Do that a few times and you will quickly tell the difference between the 2. One will most likely be WAY stronger than the other.
Then do another, then another till you are finished
Eventually on a batch of 10 you will immediately be able to get a super strong one and a super weak one.
Take those 2 and put them on one side of a table and one on the other.
Then, take the remaining 8 and do the same. Strong to weak.
Once you are done you will have a very good idea of sorted from strong to weak.
Then take the strongest one and install it. Once chronoed you have top limit of that spring
Then take the weak one and do the same. Bottom limit.
The ones in between will be steps of X fps more or less.
If strongest is 440 FPS and weakest is 350 and you have 8 springs gaining strength in between they are likely 11FPS apart. 440-350= 90. Then take the 90 and divide it by the 8 springs gaining strength moving up.

This is a good start point to get you on track. Remember, we all know out of the box most springs are out by a solid 10 FPS +/- in reality.

And before guys pile on saying springs unwind at different speeds etc, this is not a method to measure microns

Its to sort and put you into a category of 10 springs that are in a zip lock bag. There is ZERO way the weakest spring on a pull test will be anything but the weakest on FPS.

Try it---you will be surprised on how obvious the spread is.

May 23rd, 2014, 13:37	#12
Trev140_0 raging hedrosexual Trader rating Join Date: Sep 2011	Here is what I do. To give me a ball park. Take a very long and thick screw driver Then take the spring put it over the screwdriver and push the spring down till its totally compressed.Careful not to stab yourself. Then take another spring and try it. Do that a few times and you will quickly tell the difference between the 2. One will most likely be WAY stronger than the other. Then do another, then another till you are finished Eventually on a batch of 10 you will immediately be able to get a super strong one and a super weak one. Take those 2 and put them on one side of a table and one on the other. Then, take the remaining 8 and do the same. Strong to weak. Once you are done you will have a very good idea of sorted from strong to weak. Then take the strongest one and install it. Once chronoed you have top limit of that spring Then take the weak one and do the same. Bottom limit. The ones in between will be steps of X fps more or less. If strongest is 440 FPS and weakest is 350 and you have 8 springs gaining strength in between they are likely 11FPS apart. 440-350= 90. Then take the 90 and divide it by the 8 springs gaining strength moving up. This is a good start point to get you on track. Remember, we all know out of the box most springs are out by a solid 10 FPS +/- in reality. And before guys pile on saying springs unwind at different speeds etc, this is not a method to measure microns Its to sort and put you into a category of 10 springs that are in a zip lock bag. There is ZERO way the weakest spring on a pull test will be anything but the weakest on FPS. Try it---you will be surprised on how obvious the spread is. __________________ www.Hill437.com *"....Your life is ending one minute at a time..."* Last edited by Trev140_0; May 23rd, 2014 at 13:46..