SpudFiles

This is how I mod my blowguns for increased flow.

WARNING: If you mod your blowgun following this tutorial, do not blame me if it leaks. I have done this several times and have never got a leak. Though at 400PSI, the trigger is a bit harder to pull.

Oh and you can choose to drill the 'pilot' (1/8" thread port) port hole bigger like you do with the 'chamber' (1/4" thread port) side, but I choose not to so I don't damage the threads where the blowgun valve threads in to.

TIP: Make sure to clean and sand all holes you have drilled before reassemblying the valve, if you drill a hole and not clean it up, the o-rings from the blowgun valve may get damaged from stray pieces of metal.

Edit: In true Spudfiles fashion, the order of the images has been screwed up. Shouldn't be too hard to understand what's going on though.

great turtoral man looks good tried this on my gun it helped a little i think i am gonna make a sleeve valve for it because my pilot qev is crap for piloting

Nice one though you should use the macro setting on your camera when taking closeup pics

BBMG enthusiasts are advised to take this tutorial seriously

MrCrowley....have you been reading the Wiki again?

nice job, i had to do this a while back on my sprinkler valve gun in order to get it to pilot correctly. another thing you might add, you can take the pin that gets depressed out and make it a little thinner with a dremmel. then to finish it up chuck it in a drill and polish it up with different sandpaper.

jackssmirkingrevenge wrote:Nice one though you should use the macro setting on your camera when taking closeup pics

Think it was the cheap batteries I was using. The in focus pictures are with macro and good batteries, the out of focus ones are with macro and cheap batteries. Couldn't even get the camera to flash for awhile with the cheap batts.

thanks so much

wouldnt you get more flow m y filing down the pin to a smaller diameter?

otherwise great work

c11man wrote:wouldnt you get more flow m y filing down the pin to a smaller diameter?

otherwise great work

You mean the pin inside of the push-button assembly? That would give it more flow but I couldn't really be bothered

yeah thats the pin im talking a bout. ive only done it once but that was cuz i was using it as a main valve on a cannon that was going to a friend. it had a 3/4inch barrel for corks, it did supprizingly good

Cool!, I plan to try this one soon.
Hopefully not to off topic, but is there any reason ball valves are used on hybrids rather than these with a check valve (nozzle side)?

(I was thinking of one for fueling, then adding the air through another,
and a pressure switch in the chamber connected to the spark).

BTW, you have my permission to "sticky" this how-to. 8)

Hopefully not to off topic, but is there any reason ball valves are used on hybrids rather than these with a check valve (nozzle side)?

Apparently the nozzle side can seal at lower pressures so you might not need the checkvalve but I think ball valves are just easier, probably cheaper too, with the blowgun you'll have to change the 1/8" threads back to 1/4" most likely.

I have seen people use them on combustion fuel meters though.

I'm also not sure if a standard blowgun could handle the pressure spike resulting from the standard hybrid mix nowadays, which seems to be around 7-8x. Most of the 1/4" ball valves that I've bought have "40 bar" written on the side, which converts to around 600 psi.

I'm also not sure if a standard blowgun could handle the pressure spike resulting from the standard hybrid mix nowadays, which seems to be around 7-8x. Most of the 1/4" ball valves that I've bought have "40 bar" written on the side, which converts to around 600 psi.

Hence the "check valve" mentioned...
Seems like such a set up could fare better than a ball valve due to far less surface area (exposed to pressure), (edit:coupled with a sturdy one way valve) Or not(?) 8)

If the pressure from the outside gets to high the valve will open, which is why they can't be used in this application.

Ball valves are cheap, readily available and will rarely fail in standard hybrid duties.