Valve assy .177 .25 ??

DIY Modifications to the Benjamin Marauder, like Depingers, bolt handles, etc.
Mod parts offered for sale should be posted in the AFTERMARKET section.

Valve assy .177 .25 ??

Postby blower » Tue Dec 16, 2014 12:06 pm

I just bouth valve assy .177 and .25 but the are the same transfer port are 0.140 the measured over all is the same,the only diference is the spring,.177 hard spring,.25 a softer spring.
What have i bouth.(GOOGLE TRANS.)
cheers
Per
Marauder .177
blower
 
Posts: 24
Joined: Thu Jan 30, 2014 12:55 pm
Location: Northern Denmark

Re: Valve assy .177 .25 ??

Postby RayK » Tue Dec 16, 2014 12:24 pm

blower wrote:.177 hard spring,.25 a softer spring.


The stiffer poppet spring gives longer, flatter shot string at a cost of lower peak power - similar to results with BHB o-rings.

Softer spring allows higher peak power. This is why the stock Gen I 25 M-rods often get higher peak velocities with stock parts than with Gen II 25 caliber Marauders. Some guys seeking ultra-high power have eliminated the poppet return spring altogether.

Ray
25 W-rod | 08 shots @ 70 FPE -2% | 3100 fill
25 M-rod | 40 shots @ 35 FPE -4% | 3100 fill
22 M-rod | 51 shots @ 25 FPE -4% | 3100 fill
17 M-rod | 50 shots @ 19 FPE -4% | 2500 fill
25 P_rod | 16 shots @ 29 FPE -3% | 2100 fill
RayK
 
Posts: 5521
Joined: Sat Jun 05, 2010 3:19 pm

Re: Valve assy .177 .25 ??

Postby blower » Thu Dec 18, 2014 1:22 pm

RayK wrote:
blower wrote:.177 hard spring,.25 a softer spring.


The stiffer poppet spring gives longer, flatter shot string at a cost of lower peak power - similar to results with BHB o-rings.

Softer spring allows higher peak power. This is why the stock Gen I 25 M-rods often get higher peak velocities with stock parts than with Gen II 25 caliber Marauders. Some guys seeking ultra-high power have eliminated the poppet return spring altogether.

Ray


thanks Ray K

I think that these are two .25 valve assy i have and not a.177 and.25 as i order,is it only the spring that is the different in gen ll valve assy in .177 and .25.
But i may be wrong.

cheers
Per
Marauder .177
blower
 
Posts: 24
Joined: Thu Jan 30, 2014 12:55 pm
Location: Northern Denmark


Return to Marauder Mods

Who is online

Users browsing this forum: No registered users and 1 guest