I did a search and read through 7 of the 10 pages and I found a few answers but nothing that directly answered my question.
First off my buddy just bought a 2k3 impulse off a friend of mine. It has a horizontal maxflo and hes using a 72/3000 pmi tank. I'm not sure if its lp or hp, and frankly I dont think it matters much in this case.
Now for the problem. When he goes to shoot a string of balls, the first 1 or 2 come out fine but the rest just roll out of the barrel. Im thinking shootdown, but hes really not getting on the trigger.
I watched him shoot a few times and the guage on the horizontal maxflo would go down to 100 psi everytime he shot and took a second to repressurize up to 200. Sometimes the pressure would creep up past the 200psi mark we had it set at and then it would vent from the reg.
We took apart the reg and cleaned and lubed just the 3 orings it calls for in the smartparts manual. Found some debris in the cylindrical silver filter,but nothing else looked out of the ordinary. The orings all looked great so i doubt thats the problem.
Only thing I can think of is this. The previous owner said something about an oring trick.I've read a few posts on this and I think that the oring is keeping the valve on the tank from opening all the way and thats why his recharge rate is sucking so much. I'm gonna run up to the store and get his tank filled today,but I'd like some of your opinions on this as well. This is the first horizontal reg'd imp I've been around before, but I have 3 years expierence with my vert reg'd one.
Not sure if this will help your problem...
I have an old horizontal maxflo on my imp, not sure of its age but its old. To use any bottle on it I have to use the oring trick just so it won't leak. Which if you don't know is putting an oring in the asa and then putting the tank on. I don't get shoot down problems but with the oring it will leak for me. I'd try a different tank and see how it reacts. If it works fine then it could be the pin in the tank.
I understand the oring trick. I think though, that the Oring is actually keeping the pin in the asa from opening the pin on the tank all the way. Thus reducing the airflow and hurting his recharge rate.
I've been thinking about cutting down the pin on his maxflo a little,because last time i remember looking at it, it was really long compared to other asa's ive seen.
I'd cut the pin so the tank can thread further in, and seal the way its meant to in most other asa's. I just got air today so ill be able to test out my theory. I just posted this to see if anyone else had any other suggestions as to what it might be. I am 99% sure tho that it is a recharge problem.
i had the same exact problem with my maxxy so i just payed to get it rebuilt and now it works then i got shootdown but that was cause my front grip wasnt in all the way but now my impulse is in PERFECT shooting order.
if you don't want to cut the pin then all you have to do is screw your tank on when it's empty. that way there's no resistance & it will go all the way in. then just get if filled on the gun. you'll have to leave it on all day but it shouldn't be a problem.
i bought a anti siphon co2 tank w/on off switch and i didnt have the prob i had with my buddys air tank. heck i didnt even need to perform the "o-ring trick" i cant explain it but it has worked without problems for a while now.mabe cuz theres no pin or sumtin...i dunno.