I am wanting to do the B-Staley mod on my PRod. Mainly for shot string extension. All of the information I am finding is showing that a typical tune is 16fpe for 24 shots with a .110 (7/64) transfer port and the McMaster heavier spring.My question is: If I am targeting 14fpe for 32 shots, is there still a need for the increased transfer port size and heavier spring? It seems like if I am wanting relatively little power in favor of an extended string, the smaller transfer port would work in my favor. Thanks in advance for your input!
It's really give and take, I understand. I am just saying I am valuing a 32 shot string over increased power and looking for the best way to get there without the added expense of a regulator. Sounds like even with a lower power tune the transfer port and string still help to make the gun more efficient. I've just ordered the spring.Is there any input on the starting point and adjustment procedure for tuning the hammer and striker? Start hammer adjustments at just past coil bind and back out slowly? When to stop with hammer adjustments and start fine tuning with the striker?
Quote from: DLimer on March 23, 2017, 03:31:59 PMSuggest that you begin with hammer spring at 5 turns and striker at zero. Shoot a string and go from there. My 24 shot tune has hammer spring @ 5 turns and the striker @ .75 turns. Very small adjustments on the striker make big differences.Thanks! 5 turns from coil bind or from full ccw?
Suggest that you begin with hammer spring at 5 turns and striker at zero. Shoot a string and go from there. My 24 shot tune has hammer spring @ 5 turns and the striker @ .75 turns. Very small adjustments on the striker make big differences.
Quote from: TerryH on March 23, 2017, 04:16:20 PMQuote from: DLimer on March 23, 2017, 03:31:59 PMSuggest that you begin with hammer spring at 5 turns and striker at zero. Shoot a string and go from there. My 24 shot tune has hammer spring @ 5 turns and the striker @ .75 turns. Very small adjustments on the striker make big differences.Thanks! 5 turns from coil bind or from full ccw?
here is one of my early shot strings, before the HUMA ... I don't see any problem w/o the bstayly mod to get your 32 shots at 14 fpe ... look at the blue hight light in this graph. it is at 16-17 fpe for that many at around 6% ES
Humm---I wonder what the B-Staly tune would do for a Maximus! KnifeAdded: Especially with it's very short hammer travel and stiff spring.I have opened the valve port- transfer port-barrel port to Bob's specs, and am very pleased with the result. Thinking very hard on a Reg. for Her next.Knife
Like I said, the number of shot is related to the ES you find acceptable.... I use a 4% ES, and that string would only be 22 shots using that....Bob
since I had it apart I measured the TP I crafted and looks to be .2" I have a huma in it, so would think only X air it getting sent out each shot so a large TP isn't a waste, or is it ?