If your pellet is very accurate at 900fps, does it matter if that velocity is at MIN, MAX, or somewhere in between?
Tuning Impact tuning question (harmonic)
- Thread starter Corvid_hunter
- Start date
No because you can set your gun to shoot max speed for the reg setting on whatever number or letter you want just by turning the hammer spring screw. Most set their max speed for the reg setting on max on the wheel. That way you can tune under the plateau as far as you need to find peak efficiency.
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No...But if you’re OCD like me and it has to be on Max, you can change it to the Max position and just adjust the preload! 
Stoti
Yeah, like he said...Posted at the same time.
Stoti
Yeah, like he said...Posted at the same time.
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With and without the OEM factory "harmonic tuning" barrel o-rings is another simple tuning option as well as carbon fibre tube.
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Good question. Matt Dubber has a new tuning video and he starts his tune on power wheel 3
I’m curious as to his logic there. I always tune on MAX
I’m curious as to his logic there. I always tune on MAX
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I just checked my new Impact and it's shooting the 33.95gr pellets around 826fps on Max (didn't test any other speed). Any guess as to what the 25gr pellets will be going at? I have some on the way, but none to test. The factory settings (.25cal 700mm barrel) are:
Regulator - 110 bar
Hammer Spring - 19.5mm
Valve - 9.04mm
Regulator - 110 bar
Hammer Spring - 19.5mm
Valve - 9.04mm
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I think your gonna be just above the 950’s with the light 25.39’s on that tune. I’m pretty close to that tune on mine slinging 27.2’s at 880 or so with reg at 115 bar roughly.
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I have the Huma dual hole port V2 (and the probe on order) to install once I get this thing figured out and comfortable with it. I should be able to dial back the reg a bit and keep the same velocities. Or go faster.
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Not necessarily. Document where you are before you change to the new Huma port and pin probe. I would recommend just the dual port first and tune to optimal for your projectile choice. Pin probes in my testing have minimal gains above the TP change and more of a pellet / slug seat issue. DIY standard FX probe mods yield slight gains and consistent pellet/slug seating. This has proven true for me on my Impact, Dreamline and Maverick. YMMV of course.
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To answer your question.....
If it's really accurate at your setting....., just leave it there.
And now to complicate things ( and you can ignore this if wish), I have noticed that with certain PW settings you get a better ES and SD. BUT a difference of a few feet per second up to say 10 fps, will not affect your POI that much. My gun seems to get best groups and best ES/SD at PW3....go figure.
So if where your gun is set now is giving you groups that put a smile on your face....then keep the smile....don't change anything.
IMHO
Regards,
KP
If it's really accurate at your setting....., just leave it there.
And now to complicate things ( and you can ignore this if wish), I have noticed that with certain PW settings you get a better ES and SD. BUT a difference of a few feet per second up to say 10 fps, will not affect your POI that much. My gun seems to get best groups and best ES/SD at PW3....go figure.
So if where your gun is set now is giving you groups that put a smile on your face....then keep the smile....don't change anything.
IMHO
Regards,
KP
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