FIRE Pistons By Docfire PB

[docfire]

FIRE Piston for ID, WGP, Res, & MacDev – Docfire Paintball

[superman]

I noticed a difference with nummech piston. I will likely have to pick up a few for my other markers. I am sure some people may or may not see the benefit in this, but i think these are cool for the guy trying to squeeze every drop out of his marker.

[Psycho91]

What do these do

[superman]

What do these do

"Replace your Damaged or Low Flowing regulator piston. These pistons are higher flow which will allow you to run a lover operating pressure*. 6061 anodized pistons will stand the test of time. "

[Frmrspec]

This thread is useless without reg dyno’s .. show us that improved recharge/flow/consistency

[ford]

As a buffoon, I appreciate the washer patterns anodized on the pistons.

[zinger565]

As a buffoon, I appreciate the washer patterns anodized on the pistons.

Yeah, me too. Saves having to look it up or try to analyze a picture I may or may not have taken beforehand.

[Axel]

As a buffoon, I appreciate the washer patterns anodized on the pistons.

Yeah, me too. Saves having to look it up or try to analyze a picture I may or may not have taken beforehand.

It's one of those little details that I really appreciate.

[Frmrspec]

Still no dyno

[docfire]

Not yet.

[flyweightnate]

I'm a little confused. A higher flowing piston to allow a lower operating pressure, or tank input pressure? Flow through the piston should only be relevant immediately after the shot, when the reg opens... and the idea is that a typical reg piston starves the gun if you run too low an OP, but not at higher OPs?

If my memory serves, volumetric flow depends exclusively on the port diameter/ geometry if there's a good difference between the two pressures (e.g. dropping from 800psi to 350), but that flow will slow down as downstream pressure, that is, operating pressure, increases.

I'm interested in a dyno test, with upstream pressure known and downstream at several setpoints, as much to understand the velocity through the reg piston as anything. I'd recommend at least one point at a 2:1 upstream to downstream ratio, one above, and a couple below.

A look at the seat-end corners would be interesting, too - namely, the radii.

The engineer in me is starting to nerd out. I apologize.

[docfire]

Feel free to PM me as I have questions. we can talk over the phone.

[flyweightnate]

Cool, will do.

[latches109]

"higher flow which will allow you to run a lower operating pressure"

The spring stack will change the pressure output irrespective of flow. For example: I can take my stock inception reg and flip one washer to achieve lower pressure or add a washer to increase pressure. The inner diameter of the piston would not affect the pressure.

But I get what you are trying to do... the larger inner diameter should increase the response time since the piston will open less height, equaling a reduction in pressure drop from shot to shot. I could, run a really low recharge rate reg at low pressures, if, my flow requirement is only 1shot/5sec. Of the many WGP piston iterations, I do notice these benefits from a larger piston diameter base(pictured left below)

These are all the same dimension in length:




Another mod I have done for flow, is drill extra holes in the reg seat on WGP LPRs and HPRs air supply, this upstream will choke out the downstream. I don't have a good picture of a modded one, but this will give you an idea. edit: this was off an eBay gun I bought titled leaking, I found the leak.

[k_obeastly]

Once again, guns were shooting 20bps w/o shootdown 20+ years ago. How is this relevant at 10.5 bps? Other than the spring stack etching, which is nifty for those that can’t remember.