Shocker Sport random Chuff? - Shoebox / Sci-Fi

[caylegeorge]

I'm just finishing up a restore on a Shoebox shocker.

Everything is back together and seems mostly great - The issue is that under rapid fire the marker with "chuff" once in a while.

It is as if it didn't cycle fully or make a full shot? Very similar sounding to an Automag chuff, ha! Happens say every 10th -15th shot under rapid fire.

Any thoughts?

Few more details -
This is a new-to-me shoebox shocker. It was barely used then put in a box for the last 20 years.

It had an LS turbo board, but I replaced it with a Sci-Fi Board.
Sci-Fi Board settings are defaults at 12.99 bps "uncapped" semi.

Input pressure is 135PSI - *Update, increased to 160psi, same issues persist* - (What is a normal pressure to achieve normal velocities? I don't have paint to test with.)

No leaks.

Marker got a complete tear-down, cleaning and rebuild with every seal new + dow 33 per http://www.zdspb.com/
Has a manifold maxflow that also had a full tear down and re-build.

Solenoids and gaskets were left original and have not been serviced in any way (can they be?).

[Jordan]

Normal OP is 150-200 psi.

[caylegeorge]

Ahh thank you - upped the input to 160psi. Appears to persist and is unchanged.

Is there a dwell time I should increase or..?

Thanks!

[caylegeorge]

Update - looks like increasing to COFF (Cocking Solenoid Off Time) on the Sci Fi has potentially eliminated the problem. I suspected the bolt was not 100% forward under rapid fire. Will test more later with more air.

Would still love other input if people have thoughts. Thanks!

[Jordan]

Sounds like you're on the right track... unfortunately you're in mostly uncharted waters, not too many people running aftermarket boards in shoeboxes yet.

Try searching for Shocker Eblade conversion settings... there was a thread out there, and they might get you in the ballpark.

Oh, and when I had a brick Shocker I believe I was running around 180psi to get 260-270fps.

[caylegeorge]

Thank you for the insight Jordan - also good to know what the input pressure you used

I will update this thread with more data or info when I get it for future Sci-fi board users.

[lew]

All of my Shockers run right at 180 psi to get 280-290 fps.

The only time one of mine has done anything like that was when it pinched a ball. Have you cleaned and regreased the bolt piston? You can get all the seals in the bolt assembly well-lubed without resorting to taking the bolt head off of the piston shaft. A grease syringe makes everything way easier. I use Magnalube on all my guns, but the DOW greases are fine.

[caylegeorge]

All of my Shockers run right at 180 psi to get 280-290 fps.

The only time one of mine has done anything like that was when it pinched a ball. Have you cleaned and regreased the bolt piston? You can get all the seals in the bolt assembly well-lubed without resorting to taking the bolt head off of the piston shaft. A grease syringe makes everything way easier. I use Magnalube on all my guns, but the DOW greases are fine.

Thank you for the psi data

Good to know about the ball pinch - perhaps similar as it did seem to make the sound when it did not fully cycle forward.

- Yes, Everything was re-greased with dow 33. I did pull the bolt fully apart, gave it a deep clean, new seals and new lube. Good tip on the syringe and funny you mention Magnalube, I have some magnalube G for pinball repair , but I imagine Ill stick with the dow33.

Cheers

[Jonnydread]

Do you have one of the brass pop off valves? Those are nearly necessary for safe shoebox use in my experience.

My shoebox likes to run right at 200psi with HPA which puts me around 300fps, generally closer to 180psi with CO2.

I've been seriously considering a Sci-Fi board, but I have a single trigger v-sport and generally don't shoot that fast. The adjustability options are attractive though.

[lew]

Thank you for the psi data

Good to know about the ball pinch - perhaps similar as it did seem to make the sound when it did not fully cycle forward.

- Yes, Everything was re-greased with dow 33. I did pull the bolt fully apart, gave it a deep clean, new seals and new lube. Good tip on the syringe and funny you mention Magnalube, I have some magnalube G for pinball repair , but I imagine Ill stick with the dow33.

Cheers

I use Magnalube for everything that needs to be greased- paintball, firearms, et al. It's a good formulation- corrosion resistance, good on o-rings- and a pint can is cheap. No sense paying $8+ for an ounce or two when ~$15 will get you a lifetime supply.

It's good to know that the Shocker can pinch a ball, especially with field paints as of late.

Jonny, those pressure relief valves are only really germain to CO2 use. Modern HPA systems in good working order aren't going to cause any dangerous spikes. They are good for that extra bit of insurance, no doubt.

[caylegeorge]

Random question - My shoebox came to me with what was clearly the factory macroline on it, but its pretty large - It's either a 5/16th or 3/8 sized macroline (versus the standard smaller modern 1/4").

Does anyone know what the scoop on that is - was there a reason for this larger stuff? Did smart parts ship these markers with this fatter non-standard macroline? Would it be better to use the original fat stuff to combat shoot-down with these gas hogs or is modern 1/4" macro just fine?

Thanks !

[lew]

Random question - My shoebox came to me with what was clearly the factory macroline on it, but its pretty large - It's either a 5/16th or 3/8 sized macroline (versus the standard smaller modern 1/4").

Does anyone know what the scoop on that is - was there a reason for this larger stuff? Did smart parts ship these markers with this fatter non-standard macroline? Would it be better to use the original fat stuff to combat shoot-down with these gas hogs or is modern 1/4" macro just fine?

Thanks !

It's 8mm macroline. McMaster Carr has both the line and the push-to-connect fittings for very reasonable prices

My first Shocker- a 2001- looks like it came from the factory with the 8mm line, while a couple late-production 2002's definitely came with 1/4" installed. Perhaps it was an option, but I can't remember anything from that time and the factory box I have makes no mention about the air line.

I've never had a problem with shoot-down, and the Max Flo's a fantastically capable regulator, but I replaced the macroline on all my Shockers to 8mm cuz I've lost my mind.

[Jordan]

If I remember correctly it was marketed as "megaline" for the Shocker.

[lew]

If I remember correctly it was marketed as "megaline" for the Shocker.

Neat, and thanks for that little historical tidbit.

The Shocker never really caught my eye back when it was still offered new from the factory, but neither did any other electro. One thing I do remember from the three or four I handled in stores, and the one another player let me shoot was the fact that they all had 8mm macroline.