Originally posted by Skeet
What I want...is someone who actually know, to post it up here...
heres the advice from Jack Wood
Im guessing he knows his ****
(source PBn)
The first thing I would recommend, as mentioned above, is to increase the dwell up to 9, and maybe even 9.5-10.0
Some guns that leave the factory have to have the dwell raised over standard 8.0 ms in order to reach higher, more consistent readings, so it is normal and nothing to be conserned about. It is just a fact of life that some solenoids/QEVs require a slightly longer electrical pulse to achieve a consistent rammer pulse.
Jack Wood"
My added bit. Keep LPR flush unless you have issues with "kick". Start off with inline reg wound all the way out. turn screw 2.5 - 3 turns in - this is ballpark 300psi / 275 FPS ish and a good strating point.
"
The only way to set it perfectly is to keep upping the dwell over the chrono. Stop upping the dwell when the velocity peaks, and then bring it back down a couple of points.
That should give maximum velocity for minimum dwell. Obviously every time you alter the LPR you should do this again to get it absolutely spot on. Also, if you find you get a massive gain in velocity when you start upping the dwell (ie it sends the velocity 320-330 +) then bring the in-line pressure down, leave the LPR and double check the dwell by dropping itand raising it back to the peak velocity.
Basically it is a very delicate interplay between in-line pressure (because that is what stops the valve from opening AND what fires theball out) LPR pressure, valve dwell and hammer/bolt/pin mass.
Jack"
From these two posts by jack wood i got these steps
1. Set lpr to the point you want, i hear 2 turns in from flush works like a dream
2. Keep raising the dwell over the chrono until it peaks, but if it begins to go above 320-330 then lower your inline a little, and then lower the dwell a bit and continue to raise it until it peaks. Then you are good. I have also noticed that if you just raise your dwell until the gun seems most consistent it works just as well, but keep in mind you will want some high quality paint to get accurate readings.
Hope this helps SKeet