Doing some some spring testing over the next few days and I thought I’d see what peoples expectations vs reality is on springs.
All being tested on a j10 acr ( by far my easiest blaster to repeatedly tear down , just stock removal and 3 pins) which is a perfect nylon stock box with green oring and air seals epoxy’d etc.
In the running for top spot is from left to right ,
¹_1.1mm x 165mm from a new spare gen 9 gearbox i bought.
²_1.1mm x 150mm with almost 1 coil less than the next spring , from a gen 8 jinming spare box
³_1.1mm x 150mm with almost 1 coil more than last spring , from the acr’s original gen 9 box
⁴_1.2mm x 140mm from a spare skd ss gen 8
5_ 1.25mm x 140mm with more coils ,from another skd ss gen 8
6_ M90 - already been tested and the obvious winner at 300+ avg fps.
Place your bets on what will achieve the best fps based on whats known.
Edit : finished and here are the results
All are avarages…
Spring 2: 230
Spring 3: 250
Spring 4: 250
Spring 5: 210
Spring 6: 300
So nearly 1 coil more ina 1.1mm gives me 20fps more lol. And the same as a 1.1 thats 15mm longer? Weird.
And weird the 1.25 was the worst at 219 fos average