Gen II Internal DIY SSG Mod Detailed Build and Instructions

[aceflier]

 Got that thing drilled On lunch. Took 10 shots from 2700psi around 920-930fps with the 25gr Kings. Going to need to dial that down a bit.  that's with the 10lb spring.

[triggertreat]

Got that thing drilled On lunch. Took 10 shots from 2700psi around 920-930fps with the 25gr Kings. Going to need to dial that down a bit.  that's with the 10lb spring.

I think that is the hardest part to do to the mod.  Let me know what you think of the DIY SSG.  Not as many views on this forum, but am at nearly 16,500 views on the Marauder forum so some folks must be liking and building it.  If you like it, got to thank Bob Sterne for the SSG innovation.  I just made my own version and shared what I did.  I like it and the ease of adjustments and results.


I invented a mod I called the F.A.M.E. mod (Friction Assist Marauder Enhancement) that works nicely with the DIY SSG mod for easier cocking and it eliminates hammer galling.  Here is the link if interested.  You will have really smooth cocking if you choose to install it. 


http://www.gatewaytoairguns.org/GTA/index.php?topic=110568.msg1055893#msg1055893

[aceflier]

Yeah for sure thanks to Bob and yourself. It started raining so had to quit testing. Looks like there is a very fine line between 900 and 800 fps like a half a turn on preload. But I'm down to 2000psi after 4 mags and was still getting 910ish fps minus the one that was 798fps every shot has been over 905fps. That's pretty impressive. Looks like it will tune pretty much like shorty's SSS. 2800-2600psi start and probably around 1800 ending for around 32-35 shots at 45fpe. Works for me. Still have lot of preload available on the spring so should be able to get around 55-60fpe out of this V2. Will need a stronger spring if I want higher power. At 3000psi it has valve lock 850fps with same preload.

Thanks for the share Trig gave me something to  play with for a day or 2! 

[aceflier]

Looks like I need a regulator the way my gun is set up. One set at 1900psi would be about perfect i think. At any rate here is a string I just shot from 2400psi down to 1900psi with JSB king 25.4gr. Lets call this my low power tune.  Look at the efficiency! Holy smokes I did a double take when I looked at the gauge on the last shot.

[triggertreat]

Looks like I need a regulator the way my gun is set up. One set at 1900psi would be about perfect i think. At any rate here is a string I just shot from 2400psi down to 1900psi with JSB king 25.4gr. Lets call this my low power tune.  Look at the efficiency! Holy smokes I did a double take when I looked at the gauge on the last shot.

Yes that is some stellar efficiency.  I do have a .25 that is regulated with .1875 porting and was set at 1920 psi for the last tune I did with the JSB 25.39s.  I only got a 1.34 per cu/in efficiency in my 35 shot tune.  The strings average was 41.03 FPE (853fps) with a 1.98% ES (17 fps).  This was from a 3200 fill down to 1800.   Hmm might have to install my DIY SSG and give it a try as I have not tried it in it yet to see what would happen.  I have been using and loving the TSS thus far with it, but really think I am using too light of a hammer and that is the problem with efficiency in mine.


My last tune was with 33.95gr MKII pellets and you can see it in my signature below.  It was not as efficient as I would like either, but I did not have a gap set on the TSS as it was a quick setup and tune just to get on paper.  I was just trying to hit 50 FPE at the time.


Glad to see the DIY SSG is working out for you and was worth your efforts to build it.  keep us updated.

[aceflier]

60fpe tune. Not stellar but still great efficiency at this power. Did this tune in 4 shots adjusting from 2700psi. All the power I need for this rifle. I can get more also hit 960fps at 3000psi and still not coil bind so still room for more. This one is pretty similar to the 25.4gr tune but less shots with the 33.95gr MKII's. Went ahead and locked that gap down with blue loctite. I like it where it is. 

[ackuric]

60fpe tune. Not stellar but still great efficiency at this power. Did this tune in 4 shots adjusting from 2700psi. All the power I need for this rifle. I can get more also hit 960fps at 3000psi and still not coil bind so still room for more. This one is pretty similar to the 25.4gr tune but less shots with the 33.95gr MKII's. Went ahead and locked that gap down with blue loctite. I like it where it is. 

Pretty stellar results you're getting! Gotta love the SSG, getting 1.4+ efficiency at higher power was unheard of before them!

[triggertreat]

That is eleven coyotes down with only 500 psi.  That is some excellent results with a inexpensive mod.  I really like both the tunes you posted.  Sounds like you have locked it down and are now going to go and enjoy it.

[aceflier]

That is eleven coyotes down with only 500 psi.  That is some excellent results with a inexpensive mod.  I really like both the tunes you posted.  Sounds like you have locked it down and are now going to go and enjoy it.

Yeah I'm going to leave it right there for now. Now I've got to decide what I want for fathers day. A reservoir extension OR an RL shroud for my Texan. 

[aceflier]

Well, Accuracy was horrid at those speeds with the mkII's. Inch left/right/up/down at 40yds. Dialed down to 55fpe and she's one ragged hole. I'll take the extra shots and accuracy over the 5fpe.

[triggertreat]

Sounds like you have the DIY SSG dialed in with big power!

Here is a link back to the build details for anyone else wanting to try the DIY SSG:
  DIY SSG Build

Here is the link to the F.A.M.E. build details for anyone interested in easy and smooth cocking:
DIY F.A.M.E. Build

 

[aceflier]

Had the rifle completely tore apart today to make sure no water is getting into my rifle with my altaros setup. Everything looks good so threw it back together filled to 2700psi and shot this with about 1/8 turn down on HS. (BTW love that altaros fills my Mrod in 2minutes to 2700psi.)

Easy peasy!

[oldpro]

Looks like I need a regulator the way my gun is set up. One set at 1900psi would be about perfect i think. At any rate here is a string I just shot from 2400psi down to 1900psi with JSB king 25.4gr. Lets call this my low power tune.  Look at the efficiency! Holy smokes I did a double take when I looked at the gauge on the last shot.

Most excellent!!!! Very nice work indeed sir.

[aceflier]

Thanks Travis all the work was done by shorty on the valve and light valve spring. I just made the SSG from Trigs instructions. I did do a little work on the poppet ala Motorhead rounding it off a little on the drill press. Would be interesting to see how many shots I could get on a reg but I like being able to dial it up also maybe some day when I get a 30cal or 308 I'll get it regulated.

[ackuric]

Thanks Travis all the work was done by shorty on the valve and light valve spring. I just made the SSG from Trigs instructions. I did do a little work on the poppet ala Motorhead rounding it off a little on the drill press. Would be interesting to see how many shots I could get on a reg but I like being able to dial it up also maybe some day when I get a 30cal or 308 I'll get it regulated.

I thought you were regulated? Haha, makes that string look even better now . Nice work.

[oldpro]

Who needs a Regulator with a string like that. WOW

[triggertreat]

Lol, That's the power of the DIY SSG mod......Just kidding, it's a combination of a lot of effort from many folks on this forum combined plus the tuner putting it all together.  Nice tune...Enjoyed the video!

[triggertreat]

Impressive work you've done here.

Thanks!  It works quite well at extending the shot count and quieting the shot noise.