Ok so I have just crono’d my Gen8
It has green o-ring, double o-ring cylinder head (taped with tefflon), alloy inner & outer barrels and of course a 1.2 spring.
It was pushing 175 - 195 FPS. I was thinking air leak somewhere I missed. Surly it should of been up around the 250 or so right?
Before pulling down I thought I would just check to see what a 1.3 spring would do.
315 fps on average now.
Dodgy 1.2 spring perhaps?
On another note, I did find an issue while installing the new cylinder head and nozzel. The nozzel didnt slide freely off the cylinder head shaft. The nozzel internal o-ring seemed to grip the shaft of the cylinder head so I wasnt closing into the T piece properly. Bit of lube and it was all good but just thought I would mention