BRK Ghost Review

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I experienced the same thing until I turned up my reg. I wanted to shoot the JSB heavies 915fps at 95% of max. I set the power wheel on max and kept turning up reg pressure until I was shooting 964ish, then turned the power wheel down until I hit 915. It is set on level 4 with the reg around 125. Nice light hammer strike and it is very consistent. Loving the Ghost!
 
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Conventional wisdom with PCPs is to set the regulator at a pressure no higher than needed for the desired fpe. The common way you'll see guys word that is "tuning to the knee."

The Ghost doesn't fit that conventional wisdom perfectly though. If using the minimum reg pressure the shot cycle is burpy and you get nothing out of the power wheel adjustments. With the Ghost, using a higher reg pressure than necessary for desired fpe output gets you a more crisp shot cycle and actually changes the fps when the power wheel is moved.
 
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First, thank you for the replies. I have the regulator set to 2000 psi (140 barg).
I think that part has something to do with it not changing the velocity…but as stated before i cant find any online troubleshooting aricles or videos on it..

IMG_8330.jpeg
 
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Franklink said:
Those two grub screws hold the cocking shoe to the hammer. Are they snug? They don't need to be gorilla tight, but if they're loose and the cocking shoe is sliding in the dovetail of the hammer.....then yes I suppose that could be your problem. Ie If the cocking shoe moves the whole hammer beneath it should also move.
Click to expand...
What is the correct location of that shoe? Should the probe protrude unless you pull back on the cocking lever?
 
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Cocking shoe looks to be in the correct position, which is simply fully seated to the rear in that dovetail of the hammer.

These should give you an idea. Your hammer doesn't probably have the cutouts on the side like mine, but the cocking shoe configuration is the same.
PXL_20221018_041439340.jpgPXL_20221018_041432823.jpgPXL_20221018_041843757.jpgPXL_20221018_041506877.jpgPXL_20221018_041423486.jpg

As for shooting the 10.65gr Barracudas @ 1026....that's pretty fast for that particular pellet. Have you tried to change the regulator pressure at all, lower or higher? What's your goal (projectile and fpe)?
 
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Shoe moved to a more forward position: Wheel pos (Reg press psi/vel ft/s)
Min 2165/1034, 2138/1039
Max 2131/1038, 2128/1037
Min 2110/1033, 2113/1029
Max 2105/1039, 2104/1043, 2101/1039
Adj Reg
Max 2269/1064, 2227/1060
Min 2215/1040, 2208/1045, 2200/1041
Max 2200/1054
I can see that me and Mr Hill Pump are going to have as much fun as we did yesterday.....
 
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I think you're probably opposite of what I initially suspected.

I figured your fps was lower than you wanted and that the reg simply wasn't high enough to get more fps out of it. BUT now that I see where youre at (reg of 140bar and 1000+fps) I bet your need to come down on the reg.

So my guess would be somewhere between 115-125bar reg pressure will still get you close to 1000fps on MAX with those 10.6s (which again is probably too fast for them) but also get you lower fps with power wheel on MIN.
 
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tec said:
My issue is that the Power Wheel doesn't make any real change in FPS regardless of regulator pressure...I had the pressure on the regulator at 825, 950,1200 psi and again the power wheel didn't make any significant change in ft/s from Max to Min
Click to expand...

Strange.

Can you feel the hammer tension/preload increasing as you dial from MIN to MAX?
 
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tec said:
First, greatly appreciate your interest in helping me and your knowledge.
Shoe adj back. Setting psi/ft/s
Max 2290/1065, 2297/1064
Min 2290/1044, 2291/1048
And to answer your question there is minimal resistance in moving the wheel from Min to Max
Click to expand...

The above looks like fps from min and max with the 140bar reg pressure you cited earlier.

What does the max and min look like with a 100 bar reg pressure? (Same pellet).

The wheel is giving you just about 20fps difference in max and min with the 140 bar reg pressure, so it seems to be applying more preload on the spring. With the right reg pressure it should give you more variance in speed though....assuming yours is going to behave like most of them seem to.
 
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tec said:
1200 psi 83 bar
Min 1200/875, 1189/872
Max 1185/869, 1181/868
Click to expand...

Try it in the middle of the 82 bar and 140 bar.
FPS from max and Min with 110-120bar reg pressure...

From post #523 on page 27
Screenshot_20231019-133702.png


There's some potentially relevant discussion there....but the short version is that your energy output will peak at a certain reg pressure, and be less than that at lower AND higher reg pressure. For mine, the greatest variance of fps produced by the power wheel coincides with that peak energy output reg pressure.
 
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