Impulse optimum pressures n dwell

[el_thwatez]

ok, i been fiddling with my impy up for a good amount of today, just with different settings just to see what happened (got the bolt to a low enough working pressure that it couldnt chop balls until like the 6th attempt on the same ball), but either way, i was wondering:

is there a way to set up your input and LPR pressures, and Dwell on an impy to optimum performance, without a chrony?

 

[Hairbear89]

I don't have a clue about Impy's mate but try this site; it has an Impulse section in the middle which hopefully should give you some answers:

www.shockerowners.com

Arrr got another link for you as well, this one would be my first port of call:

http://www.zdspb.com/

Happy tinkering.

Russ

 

[el_thwatez]

haha cheers, yeh zdspb was my inspiration to start tinkering , i think it was all going well till i started testing to see if the bolt would chop balls n after about the 7th time on the same ball.. without a barrel on, the bathroom became a nice new bright pink colour

 

[DarrenS]

I have my input pressure between 150 and 175 psi and chronie it, then up the dwell until it hits 280fps.

mine seems to fun fine now my chopping problem is sorted.

 

[Scars]

Impulses can very much depend on whats on the marker and how old the marker is etc

My first impy needed 190 spi @ 290fps whilst my Eclipse needed about 135psi @290 fps

What, bolt, volumiser/chamber, valve & hammer do you have in her

In all fairness with impulses as they do flutter with optimum pressures - providing its consistant over the chrono and not over 200 psi i wouldnt worry too much

 

[el_thwatez]

its pretty much all NDZ,
Ram housing assembly (includes)
SST Mid hammer,
Slik shot rod,
LPR/ANS combo,
R.I.P High flow valve,
and a voodoo bolt,
the base gun is a Toxic

i think i currently got it set around 8-10 bleeps for dwell, 140psi input, ant the lowest possible LPR pressure (literally turn it any more and not enough air goes through to move the bolt all the way)

 

[Scars]

well i would give your LPR another 1/4 turn to decrease drop off (usual one)

Things that can effect your optimum pressure is mainly tapeworms, volumisers valves etc