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Who tuned your maurader?
- Thread starter Texan
- Start date
So far me. And, no, I wouldn't recommend me. I've tried a regulator (with and without an extension), an FFH, enlarging the valve port, changing the valve spring, and the hammer spring. Trying for about 40 good shots with a velocity of about 850fps giving 40ftlbs. Not there yet. Still working on it.
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Try Tim Hill for aftermarket parts... high flow valves, hammers, transfer ports, every spring known to man...... you name it. Tell him what you want out of the gun, he'll steer you right. Great resource for the do it yourselfer... I got some parts from him, and with all adjustments turned down, I got almost 1200 fps with a .177. God only knows what I would have got if I turned them UP!!!!!!
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So far, me,... I am pleased with the results with good aftermarket parts. This kind of work appeals to me, numbers are my thing.
In all fairness, with all of the very good replacement and upgrade parts, you can get phenomenal results with the right combination.
Marauder .25 caliber setup on the airgun:
Hill flyweight Aluminum hammer, with lighter than factory striker.
Hammer tube deburred and polished, with graphite lube.
TSS Hammer spring system, using the two lightest springs in the set, set close to minimum settings.
Huma regulator with integral gauge block, set to 1800 PSI.
Hill valve with optional lighter spring.
Increased port to 0.187 with interior of bore radiused at port, with Hill 0.187 plastic transfer port tube.
Reshaped bolt to enhance flow where it would normally partially block the transfer port.
42 shots at 40 FPE with JSB Exact king 25.39 grain (unsorted) with a maximum variation across the entire shot string of 1.8 percent (fastest shot to slowest shot variation).
Soon, I will be increasing the Huma regulated pressure up to about 2100 PSI for the heavier JSB Exact King Heavy 33.95 grain Mark II pellets. Goal is as many shots possible with less than 2 percent variation at 50 FPE.
In all fairness, with all of the very good replacement and upgrade parts, you can get phenomenal results with the right combination.
Marauder .25 caliber setup on the airgun:
Hill flyweight Aluminum hammer, with lighter than factory striker.
Hammer tube deburred and polished, with graphite lube.
TSS Hammer spring system, using the two lightest springs in the set, set close to minimum settings.
Huma regulator with integral gauge block, set to 1800 PSI.
Hill valve with optional lighter spring.
Increased port to 0.187 with interior of bore radiused at port, with Hill 0.187 plastic transfer port tube.
Reshaped bolt to enhance flow where it would normally partially block the transfer port.
42 shots at 40 FPE with JSB Exact king 25.39 grain (unsorted) with a maximum variation across the entire shot string of 1.8 percent (fastest shot to slowest shot variation).
Soon, I will be increasing the Huma regulated pressure up to about 2100 PSI for the heavier JSB Exact King Heavy 33.95 grain Mark II pellets. Goal is as many shots possible with less than 2 percent variation at 50 FPE.
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The guy I got my .22 Gen 1 tuned it, not sure what he did. It's set up for 2100 psi fill pressure. It only gets 24 good shots, but the ES is 10fps.
I tuned my .25 for low fill pressure (2300 psi) I only get 20 good shots at 35fpe with a 20 fps spread. I want more shots and power, thinking about Hill parts.
I tuned my .25 for low fill pressure (2300 psi) I only get 20 good shots at 35fpe with a 20 fps spread. I want more shots and power, thinking about Hill parts.
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my buddy has the tim hill set up but with the huma reg.and he is gettg 40 shots with the 25.4..alex
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Me. Installed Tim Hill's max power kit (no regulator) in a .25 for 32+ consistent shots. I was so impressed with the valve that I just ordered the valve/kit for the Marauder Pistol. There are several good valves/kits out there from others as well.
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