RT valve input pressure

[Lohman446]

Two dumb questions - first is I have a preset tank with 800PSI output pressure - is this going to create havoc if I try the RT valve or will I still obtain decent rates of fire (likely the recharge is faster than my finger).

Second thing - preset regulators - I assume it is just the spring pressure that sets what these are at... would a weaker spring just increase pressure or is messing with a preset tank asking for problems

[ChucktheMAGician]

800psi will do fine. I'm not sure I'd mess w/ the springs in a preset tanks. If you don't know what you're doing and think you may have problems you probably will!

[Lohman446]

Im a mechanic by trade - this seems intuitive, however, its one of those things that I have this vague feeling in the back of my mind that something would go wrong, and I would end up being a candidate for the Darwin awards.

[Meph]

Yes. Messing with a tank that has been hydrotested and manufactured for a specific function is indeed just asking for trouble. I might suggest just buying an adjustable tank.

[Lohman446]

I like the idea that 800PSI is enough pressure to run them - I have guaged the output pressure and it is just over 810 PSI - as long as noone thinks more pressure would be substantially better...

[Gadget]

810 will run a RT valve just fine.

You can shim preset valves to increase the output (a stronger spring will increase the output - the air pressure needs to be higher to overcome the increased resistance) - but you won't need too, 800psi is ideal.

[Structure]

I have the same question! I have an AutoMag RT Pro and was about to buy an adjustable nitro tank when I saw this post. So 800psi IS ideal for my gun and not 600-650? Are there any other benefits/drawbacks about adjustables?

[Gadget]

800 is perfect for a RT/ReTro/X valve.

600-650 might actually be a bit too low if you're running level 10.

Decent adjustables like the Flatline or Air America regs tend to be better constructed than most presets, are usually easier to strip + maintain and they give you the option of tuning the reactivity of your valve by modifying the input pressure.

Personally I've found a preset suits me fine (I've also got an AA adjustable on my backup mag) - I use a 4500psi PMI Pure Energy reg on my X-valved E-Mag and put 2500 paint through it on Sunday without a hiccup - was chronoing at 290-295 all day.

[Eric Cartman]

Hey Lohman. I did exactly what you're talking about. I had a preset Bulldog and I found that the 800 psi was a little lower than I wanted it. The gun still worked fine at 800 psi, but I noticed little or no reactivity. I put a longer spring in the regulator, but wound up getting about 1000 psi out of it which was higher than I wanted to be. In the end I got tired of screwing around taking the reg apart and putting it back together and I went out and bought an adjustable reg. I run this at 900 psi and find that's about perfect (for me anyway).
Good luck with it whatever you do.