TURNING THE POWER TO MAX LOWERS VELOCITY?
So after 4 weeks I finally get back my condor ss .25 cal. I did some shot strings over the weekend and noticed that if i put the power to
max that it would actually decrease the velocity of the pellet. I’m using Jsb kings 25.4 grains. at 2700 psi. Has anyone ever had this issue?
The velocity would drop lower than if i had it set at zero.
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Where are you located? If your close you can bring it by and let me play with it.
Yesterday i was able to do 2 shot strings at 3000 psi
PW- 0= 842.3, 854, 885.9, 886.7, 888.8, 884.9, 923.7, 933.7, 938.8, 943.8, 950.2, 951.7, 945.6, 952.4, 973.7, 966.6, 960.4, 975.9, 982.7, 986.4, 986.1, 981.2, 988.4, 979, 980.7, 982.7
PW- max it starts at 1039, 1014,1022,1013,998.3,1003,999.9,1003,977.7,946.2, 943.8, 936.8, 928, 926, 922.9, 908.1, 913.7 913.7, 904.4, 901.3, 920.1, 924.8, 931.9, 912.8, 905.3
why does it have lower velocities at 3000psi compared to 2700 ?
is this normal ? to me it seems its all backwards.
All lm saying is there is à point that an over compressed spring is not going to help. You Just pushing on a valve thats already closed.
You have the answers in the post with the settings and velocities. If you want those higher pw settings and higher starting velocity with a bell curve you will need to fill to 3k psi or maybe even 3100. With a fill of 2700 psi those higher pw settings are over powering the valve and not starting with any valve lock so you get the instant velocity drop.
Thanks guys for the respond. I appreciate it. Wish i had 2 so i can compare.
Your numbers seem low for 2700 psi. What is your TH set at?
Dont know if elevation has anything to do with it. Its what he told me over the phone. The TH is set at .092 these are the numbers i got at 2700 psi
I only played around with it at PW setting 0 , 6, 8, then went to max 13
At PW 0 it starts at 975 goes as high as 997 on the 4th shot and slowly decrease to 880 on the 26th shot
At PW 6 it starts at 1044 and slowly decrease to 860 on the 26th shot. no bell curve.
At PW 8 it starts at 1048 and slowly decrease to 856.6 on the 26th shot
At PW 13 it starts at 946 and slowly decrease to 870.6 on the 15th shot .
I just thought that by increasing the power that the velocity would keep going up not down. From what i’ve read here the jsb are good around 950 fps.
Just a little worried because of the issues i had with the gun. If its a normal characteristics then cool.
http://www.talonairgun.com/forum/viewtopic.php?f=4&t=27160
I could be wrong but i dont think the power wheel shortens the hammer stroke all the power wheel does is increase or decrease the springs tension. Increasing the power wheel does not cause the hammer to strike with less force it is the oposite it causes it to hit harder because the spring is under more tension. When you dont have a bell curve and simply drop every shot in velocity you have to much pre load on the hammer spring for the fill you are using in the tank. To fix that you either lower the hammer spring pre load untill you get the initial valve lock to get the bell curve you want or fill to a higher psi to achieve the bell curve and peak velocity you want.
max that it would actually decrease the velocity of the pellet. I’m using Jsb kings 25.4 grains. at 2700 psi. Has anyone ever had this issue?
The velocity would drop lower than if i had set at zero.
There is a balance to be had in the relationship between the hammer and hammer spring, to much preload overcompresses the hammer spring thus shortening the power stroke which lessens the hammer strike (think 3” punch vs 6” punch)
On a stock gun there is a point on the PW where the hammer strike will peak then drop. A chrony will help you figure out what the # on the PW this happens.
A well matched custom Brass hammer,hammer spring combo from Tony or Doug would give you a broader range to tune, depending on what you want to shoot in the future only pellets and slugs or cast bullets.
I’m in SoCal and what would elevation have to do with it?
Your numbers seem low for 2700 psi. What is your TH set at?
If you want a bell curve you need to either lower the hammer spring pre load aka power wheel or fill to a higher psi.
Is this with stock spring and valve?
Didn’t know it would effect a stock setup though.
Same goes for the .257 and .308. I think is because the valve is bottoming out hard enough that it helps it close. The the harder it hits the faster it rebounds close.
Yes its stock. I’ve been having issues from the beginning so i just want to make sure its normal. i had issues with the valve seat and the gun would’nt have any power to push a pellet out. I think Randy from Rl said the valve seat came off. Right now at max power setting 2700 psi the velocity starts at 946 fps and continuosly drop to 870.6 after 15 shots. Can someone with a stock gun confirm this is normal. Just curious cause if i wanted to use heavier pellets my fps might dropped a lot lower. Im in Socal and he said
the elevation might have something to do with it.
Yes.
Is this with stock spring and valve?
Didn’t know it would effect a stock setup though.
Same goes for the .257 and .308. I think is because the valve is bottoming out hard enough that it helps it close. The the harder it hits the faster it rebounds close.
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I’m in temecula. Dont mine driving. I commute to SD everyday.