Anybody here turned a .discovery down to 12 ft-lbs?

Anybody here turned a .discovery down to 12 ft-lbs?

q1q
Joined: May 24th, 2001, 2:45 am

October 28th, 2009, 12:36 am #1

What did you replace? Hammer weight? hammer spring? transfer port? How did you do it?
Number of shots per fill, what fill pressure.

Steve
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Joined: October 27th, 2003, 11:32 pm

October 28th, 2009, 12:45 am #2

can't remember who it was, maybe Tim can chime in on it...

Regards,

Tony
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Joined: May 12th, 2001, 1:29 pm

October 28th, 2009, 1:08 am #3

What did you replace? Hammer weight? hammer spring? transfer port? How did you do it?
Number of shots per fill, what fill pressure.

Steve
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The 100fps spread could be drastically improved with a lighter hammer, but I never got back to it.

http://www.network54.com/Forum/79537/th ... +Discovery

Steve
Last edited by pneuguy on October 28th, 2009, 1:08 am, edited 1 time in total.
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Joined: January 16th, 2004, 12:07 am

October 28th, 2009, 1:20 am #4

What did you replace? Hammer weight? hammer spring? transfer port? How did you do it?
Number of shots per fill, what fill pressure.

Steve
Yellow Forums Administrator
http://www.yellowforum.com
I did it by clipping striker spring coils. My HDD equipped .177 gets 50 shots with a 1625 psi fill, within 30 fps (and takes 40ish easy pump strokes to fill).

I think that a lightened striker with the appropriate spring and a higher fill pressure would yield a flatter curve, and would be the best setup.

Jeff
Jeff Marshall
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q1q
Joined: May 24th, 2001, 2:45 am

October 28th, 2009, 1:46 am #5

Like "Step A do this Step B do that." I am getting one that I want to turn down and Greg Davis is too busy now to bother him. He 'll probably get it later on to perfect but for now I 'd like to play with it myself.
I did the coil think in the past but the spread was too much over the string. 100 fps is simply not acceptable. I 'd like to keep it to, as you said Jeff, 30 fps.

Steve
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Joined: May 12th, 2001, 1:29 pm

October 28th, 2009, 2:04 am #6

Step 1. Install an easy-to-twiddle power adjuster with a light spring and a wide adjustment range. I recommend the finger-adjustable AoAZ with positive locknut and Delrin spring guide, but there are probably others that would work, too.

Step 2. Use the "Pick a Pressure - Any Pressure" tuning procedure in the archives with an initial fill pressure somewhere around 1400psi.

Optional Step 1.5: Install an HDD for less noise and about 30% to 50% more shots per fill.

Steve
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q1q
Joined: May 24th, 2001, 2:45 am

October 28th, 2009, 2:51 am #7

You even sale pitch to me LOL

Steve
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Joined: May 12th, 2001, 1:29 pm

October 28th, 2009, 3:01 am #8

...that I personally haven't tested (e.g., anybody else's spring adjuster), nor would I ever personally try to get a decent Disco string without an HDD.

Steve
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Joined: July 14th, 2008, 9:10 pm

October 28th, 2009, 5:04 am #9

What did you replace? Hammer weight? hammer spring? transfer port? How did you do it?
Number of shots per fill, what fill pressure.

Steve
Yellow Forums Administrator
http://www.yellowforum.com
First order one then stare at the top of the barrel and notice you can see day light around the pressure gauge. Wiggle toes to confirm. Sit it on top the pretty box and compare it to the photo while you scratch your head. Ponder the fact a Popsicle stick and the stock have the same feel. Cringe thinking that you will wake the neighbors with the loud report. Marvel that when you fill the reservoir you can flex the barrel like superman.

Then list the thing on the classified here.

Finally order an FX Cyclone and set the 3 position power adjuster on low. Bam, you have turned a Disco down to 13-14 ft lbs. I know this works because I did it. : )




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Joined: May 12th, 2001, 1:29 pm

October 28th, 2009, 5:14 am #10



Steve
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