I have a new FX with a power plenum. I have the pre-load tension spring at max, 105 bar on the reg. My FPS on Max power wheel is slower than on Min. Anyone ever have this issue and can recommend a solution? Thanks.
Tuning FX MK2 power wheel problem
- Thread starter BobS
- Start date
Way too much hammer spring especially for only 105 bars. Turn the HS adjustment screw down until your speed drops on max.
watch ernest row’s master class video on how to tune the impact and it will make a lot more sense.
watch ernest row’s master class video on how to tune the impact and it will make a lot more sense.
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Qball hit it. The Reg and the hammer spring need to be balanced. If you have them on opposite ends of the spectrum, you will have this problem.
Definitely watch the videos. You don’t want to crank on those adjustments if you don’t know how they work.
Definitely watch the videos. You don’t want to crank on those adjustments if you don’t know how they work.
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To follow up on Qball’s answer, which is absolutely correct, here is a copy from a thread that I researched when I had this problem on a Dreamline Tactical some time ago:
”Here are some reasons why no speed difference between min and max on the power wheel.
1. the valve adjuster is over adjusted CW on min so increasing PW to max has little affect.
2. HSTA preload is over adjusted to a given reg pressure—-> reg pressure speed max out on min so no speed increase in max.
3. Excessive lock tight on C9 will jam HSTA so adjusting has no affect.
4. On high power mods with high reg, max preload on max PW there will be slightly speed change to min on PW.
5. PW is controlled by the VA, Reg pressure, HSTA preloud not the other way around.
Ernest
FX Team”
Chris
”Here are some reasons why no speed difference between min and max on the power wheel.
1. the valve adjuster is over adjusted CW on min so increasing PW to max has little affect.
2. HSTA preload is over adjusted to a given reg pressure—-> reg pressure speed max out on min so no speed increase in max.
3. Excessive lock tight on C9 will jam HSTA so adjusting has no affect.
4. On high power mods with high reg, max preload on max PW there will be slightly speed change to min on PW.
5. PW is controlled by the VA, Reg pressure, HSTA preloud not the other way around.
Ernest
FX Team”
Chris
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By the way, Qball was completely instrumental in helping me fix my problem back then too!
Chris
Chris
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Think of it this way. HSTA maxed out is like your PW=Max is really Max++++ it’s holding the valve open too long where you waste air with no increase in speed for that reg pressure. And as such....
PW5 is like Max+++ ie same velocity
PW4 and it’s Max++, same velocity, etc.
Finally you get to true Max velocity down around PW=Minimum.
So you back off the HSTA while at PW=MAX until the speed starts to drop and that is the true Max at that reg pressure. Your valve opens and shuts with no wasted air
Now, PW=5 becomes Max-1
PW=4 is Max-2 etc.
and each lower number is lower speed.
PW5 is like Max+++ ie same velocity
PW4 and it’s Max++, same velocity, etc.
Finally you get to true Max velocity down around PW=Minimum.
So you back off the HSTA while at PW=MAX until the speed starts to drop and that is the true Max at that reg pressure. Your valve opens and shuts with no wasted air
Now, PW=5 becomes Max-1
PW=4 is Max-2 etc.
and each lower number is lower speed.
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