How To: Set your LPR and HPR

[outrageous]

Original Post

Originally Posted by Jack & Coke

When I spoke with Bob on the phone, he gave me a few tips on how to gas up the Timmy for optimal and consistent performance. Will the Timmy work if you just gas it up? Sure!
But what follows is what Bob believes and practices...

HOW TO GAS UP YOUR GUN FOR A WHOLE DAY OF PAINTBALL

1. When you first gas up your Timmy for a day of paintball, screw in your tank (or turn on the on/off ASA). Your gun will pressurize and you will be able to fire it.

2. Take a hex wrench and back the set screw of your LP Reg out (counter clock-wise) until it is flush with the end cap. Do the same to the HP reg. Fire your marker a few times as you do this and you will immediately notice that the system loses pressure to the point that it will not cycle (Kinda like when you de-gas a CO2 bottle from a marker).

EDIT: Step 2.5. Turn the HPR screw in about a turn or so, just to get a little pressure flowing into the marker so you can successfully perform step 3.

3. Slowly begin turning the LP reg screw in (clock-wise) in small increments (i.e. 1/16 of a turn) as you fire the gun. Keep doing this until your main gauge reads 85 psi (EDIT: at the time this article was written, it was geared towards a Gen 2 (2k2) - if you have a Gen3, the manual suggests a range of 70-80 psi - likewise, if you have a Gen4, the manual suggests a range of 55-65 psi). Now your operating pressure is set.

4. After you have set the operating to 85 psi (EDIT: see note above), slowly screw in the set screws in the HP reg (clock-wise), until you see about 4 threads. This should put you in the neighborhood of 250-310 fps.

5. Go to a chrono and fine turn the HP reg setting until your marker is shooting at the velocity you want.

6. DO NOT DE-GAS YOUR GUN FOR THE REST OF THE DAY. Bob keeps his marker pressurized until his is done for the day. Only use your power on/off switch to disable your gun.

What this does is reset the tensions on the HP and LP reg springs. When you first gas the gun up, the gas pressure in your tank slams full force into the HP and LP regs. It takes time (i.e. many shots) for the springs to correctly adjust from a state of non-pressure, to a state of consistent pressure.

The idea of steps 1-5 is to slowly introduce pressure into your gun's system instead of 'shocking' it. Just think of the Regs as faucet valves in your sink. Be nice to them !

The idea of step 6 is to keep the springs in your regs under consistent pressure so your gun will have consistent velocities throughout the day. Good consistent spring pressure = good consistent regs = good consistent air pressure on the balls = good consistent ball trajectories = good consistent ACCURACY! Let's say you play 10 games, and after each game you de-gas your gun. That's 10 times your reg springs have to reset! How do you expect your regs to be consistent?

Bob says he does this every time he plays. But if you just want to goof around and shoot the gun, it's ok to just gas it up and rock and roll. Just don't expect super duper consistent velocities.

[armyofeclipse]

found the post on PBNation by Jack&Coke???
Heres the link...
http://www.pbnation.com/showthread.p...997#post640997

-Andy

[outrageous]

Thank you for letting me give credit.

[saint]

How do you tell what pressure your LPR is set at??? is there a tester available?

[crankwalk]

This article applies to Gen1-Gen4 Intimidators. They come with pressure gauges installed in the front block. If you have one of these markers and the gauge isn't there, that means someone removed it and installed a plug in its place. I'd recommend you re-install a gauge as soon as you can for accurate tuning.

For Gen5s, pressure testers are available from BLAST.

[saint]

Sorry brother... I am new to timmy's and thought that guage was for the pressure of the HPR...LOL

Thanks.

[crankwalk]

No problem - pressure gauges mounted directly on the HPR itself are the ones that are going to give you the HPR pressure.

[zelly]

What a great article, you learn something new everyday, im sure it would make a big diff in tourney ball. Bob is the man

[Twisted_mister]

I sweetspot my regs. The gun runs at a lower lpr pressure and shoots like butter.
Me 2k5ed species has a epek ram and spring with no weights in it. i have a volumizer on the alias lpr and scmIII internals with ha pbk piston.

1. Degass the marker
2. Back out the lpr so that it is flush with the cap.
3. Back the hpr out until it is flush with the cap.
4. Gas the marker up.
5. Turn the hpr in 1 1/2 turns.
6. Turn the lpr in until the gun cycles fully without "farting" at a high rate of dry fire.
7. Go to the chrono and turn the hpr in 1/4 turn and shoot. Continue to do this until the velocity decreases. Back the hpr off 1/2 turn.
8. Raise the lpr until you get to your desired velocity.
9. Repeat step 7.
10. Repeat step 8.
11. Continue until the hpr is dropping off 1/4 turn past your desired velocity.

My species get 300fps at 65psi with this method. It shoots like a dream. If I just crank it to 80 and set the hpr, it has a bit of recoil at high rates of fire.

This is how I have done it for years and it works like a dream.

[necrolyte]

Good post Twisted.