Tuning It's Nice when your Gauges seem Accurate

Tonight while tuning the Maverick down a bit from shooting the NSA 31.2 from the upper 9’s (not so good) down to the 940’s to see where that puts me on paper @50 and 100. I reset reg2 to 130bar to start again the process, and adjusted the grub screw to 3mm with PW on #7 as a start point I knew would get me to around 940, then, with a 250bar fill I started shooting…

Sunday I had the regs set to 173/147 on and was not getting the groups I was hoping for @100, for many other reasons as well and we can get into that another time, this is about the gauges.

Back story.

What I have on the Maverick is a replaced bottle gauge of the Wika type that registers to 315bar, it is a 28mm gauge. I also replaced the Regulator gauge with a Sekhmet Digital gauge, also 28mm. I like them both. Why did I replace the original FX gauges you ask? After degassing the gun to adjust the regs I noticed that the “zero” that each gauge was pointing to was different and I couldn’t handle that disparity. Off they came. I’m a computer guy and “digital” anything catches my eye because of the data possibilities. Be warned, more data can be more Fussy to work with (like tuning…), but I’m up for the task. The Sekhmet is not super intuitive and the “how-to” is barely a starting point. Persistence pays off and success will be achieved.

To mention one of the cooler points I really thought was fantastic is the PSI per shot data that gives an expected shot count per fill, Awesome!, but, that only works if it is the only gauge between the bottle and port, not a dual regulated system like the maverick or M3. Oh well.

I realized after I purchased the Sekhmet I should have purchased the ROM flash accessory to update the firmware. This is imperative, you will need both, and for $25 it’s a no brainer. They were backordered and I got one right when they arrived. Another small detail is that it is taller than a standard FX/Huma gauge, but not enough to be “in your face” big.

I guess this is turning out to be a Sekhmet review…lol, but it is about both the Wika and Sekhmet being the quality we all are looking for in gauges. We want to know where we are with our air, whether it be the bottle or the regulator, I want to know it to be consistent with whatever metric I am using!!!

To conclude my story of this evening, I will share my satisfying discovery.

As I said earlier, I had a 250bar fill for my testing and was doing 3 shot adjustments. I was not realizing that I had been through 60+ shots in the 930-950’s as the bottle gauge was on the other side of the Maverick and I was fixated on the digital Sekhmet for reg stability. Then the last FPS shot just dropped, not being consistent with my adjustments. Looking at the Sekhmet, it said 131bar constant, not the 137bar I set it to. I flipped the Maverick on its side to look at the bottle gauge and what do you know, it said 131bar too!

Technology is cool, when it delivers.

It’s funny, I’m not sure which of these two gauges I’m most impressed with.

More testing tomorrow…

Patrick



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I've got similar plans to shuffle gauges around. FX 1st reg gauge on M3 is not accurate. I'm planning on moving the wika bottle gauge over to that 1st reg slot and use it to ACCURATELY monitor fill status since it is easier to see on the left side of gun. Once you drop off the first reg it is reading fill pressure. Then I'm going to put a digital gauge on the angled manometer bracket for 2nd reg. Waiting on FX to release their black 315 bar wika gauge (for the bottle/fill upgrade) and also their digital gauge to see how it compares to the sekhmet (for use on the 2nd reg).



I think having a digital gauge on the 2nd reg that is easy to see (such as on the new angled bracket) is going to be key to precision. Not just setting tunes and monitoring for problems like in the above example, but also doping for reg creep. Sit around hunting for an hour or more and your reg is now at +1 to +5bar, either from creep or temperature changes? You can have another column on your dope chart for that so your first shot precision is the same.



I share a similar sentiment on the electronics and like fully mechanical (operationally) guns. That said, I think having some digital instrumentation does complement the guns, especially if you still had a second analog gauge as backup. Kind of gives you the best of both worlds.