FX Masterclass on Impact tuning

[FX-USA]

We have a new and much requested FX Masterclass video hosted by Ernest Rowe showing how he tunes an FX Impact. The same principles apply to any of the modern adjustable FX rifles, so hopefully you'll learn something new!

https://www.youtube.com/watch?v=9K9uG2KOPt0

 

[cahil_2]

Thanks FX, I learned a lot and applied it to my impact. 

 

[ImpactX]

I feel bad for those using 30 cal and slug. Gonna be expensive lmao.

 

[Teaboy]

Thanks Ernest, I applied the techniques to a sub 12 in the UK. Obviously the fps is a lot lower (8.4 g at 780 fps) and the start reg pressure is low compared to you unlimited guys. But the process and techniques work. Remove the HST and valve limiter from stage 1 by maxing the HST and backing out the valve. Slowly increase reg pressure to get slightly above desired velocity. Then back out the HST until the velocity drops, then tweek back in. This gives max velocity at that reg pressure. Then use the valve limiter to drop the velocity that tiny bit to the target. I got 10 consecutive duplicate readings on the chronograph. Been waiting for this info for a long time. Thanks Ernest. 

 

[AirGunnerOK]

Ernest, you're the man! Thank you for taking the time to walk us through the process. It all seems much clearer now.

Time to go in the backyard and apply what I just learned.

Thanks again Ernest!

 

[Paio]

Thanks Ernest and FX.

I think it would be very helpful if you guys can provide us with some "targets" for max FPS before adjusting VA and FPS after using the VA for different pellets and calibers. I am interested on JSB 25.39 grains and .25 caliber.

 

[Bob_O]

Thanks Ernest and FX.

I think it would be very helpful if you guys can provide us with some "targets" for max FPS before adjusting VA and FPS after using the VA for different pellets and calibers. I am interested on JSB 25.39 grains and .25 caliber.

Target velocity is your choice. Some like to shoot those fast, like 950fps. Others like them slower, like 830fps.

I feel bad for those using 30 cal and slug. Gonna be expensive lmao.

Why would you feel bad for them, it's their money and their choice.