Blodnob Valve, 100g hammer, 25lb spring, hhhmmmm

All right i tried it and wasn’t impressed at all, dam that 12″ barrel. More power, yes. But,my consistency went to hell and my shot velocity was less in FPEs on shot (last one ) 14 as it was on shot 20 with the factory spring and my 75g hammer. Could be that i’m just not using the valves full potential with the 12″ barrel. I really believe this to be the case. We’ll soon see in the future. Will drop in the 18″ one of these days and do a string or two. I did have the 18″ in last year and got over 1000fps, but it wasn’t neighbor friendly, so i need to get my shroud on as well. For now here is the string i shot.
100g hammer, 25lb spring, 21g Kodiaks, tophat set at 2.5mm which yields good consistency with my other setup mentioned, PW set at 6. 2.4mm yields a bit higher power and i will do a string at that setting as well with the heavier configuration. I just don’t like all that extra force going on in the inside of my rig, Sean can build any replacement part he needs, i can’t, most the pity. I can assure you the force of a 100gram hammer being pushed by a 25lb compressed spring is plenty powerful.

01. 903.8
02. 899.3
03. 901.4
04. 894.1
05. 896.2
06. 885.8
07. 881
08. 874.7
09. 867.3
10. 866.4 (10shot string) 887avg fps, 36.8fpe, 37.4fps extreme spread
11. 861.6
12. 854.3
13. 852.8
14. 842.3 61.5 extreme spread.
Done, saw all i needed to, made an avg. of 30fps more in power, which is dam good. But doubled my shot spread, not good for me. with the same tophat setting and the above mentioned factory spring w/ 75g hammer, i had a 10shot avg of 853fps which did jump around a bit shot to shot for the first 10 shots and settled down to a extreme spread of 37.5fps after 20 shots with a avg. velocity of 850.9fps for 33.9fpe. That is still a near 3fpe increase over what was previously posted, but that thread went to the dogs 😆 So i’ll continue here.. My goal is to get as much power while maintaining a reasonable shot to shot spread. I’ll turn down the tophat to 2.4mm and see if i can get a tighter shot spread. I tried 2.3 and got some tighter #’s but with a much lower velocity. Aaahhh the fun is in all the fine tuneing, without it this would be just another gun to collect dust. This platform is just full of fun. So many different configurations and possibilities, the challenges are endless.

Where is everyone elses info??

Now, Sean knows his valve and it does have a huge orafice, i was very surprised to find such a tight spread considering the tophats opening. Using just the 12″ barrel i believe alot of air is being wasted using a heavy hammer/spring combination. I’ll know as soon as i drop in the 18″, just need to find the time to get the delrin bushings drilled out and tapped or make a pair of new ones, out of a pair of 1″Dx 9/16″ opening shaft collars. Just need to open up the diameter to 16mm another 1/16 or so. I’ll post a how to when i get around to the project. They are available at the hardware store. 1 set screw to secure it to the barrel. Pretty much exactly what is currently being used on the barrels as bushing now. I can see no difference.