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Old 02-25-2012, 04:44 PM   #1 (permalink)
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Sterling setup questions: What's your opinion?

Hey guys, I just got back on the site in the last week or so. I used to be a member way back when the site was on the old layout. Lost my password to that account and renamed myself using _ in the middle. Anyways, I'm a sterling guy and I have a few questions.

My first and primary sterling is a a black centerfeed, circa 2000 I think, added a return spring and side tapped the valved to run a line to a vert bottle setup. I have a rainman vert rail, but currently currently using original bottomline setup. I also have a palmers male stab (not sure on the pressure rating) that needs a rebuild. Basically I need help deciding whether to rebuild the stab and put it back on my gun. What is the optimal operating pressure for a sterling? I seem to recall someone saying 800-900 input psi, but not sure. Would it be worth regulating the gun? I prefer using Co2 sense it's more available and lighter, but I do have a HPA tank. Thoughts? Is there any consistency to be gained by regging it? Or should I just keep it light and simple and just go with the bottomline? If I did reg it, I may do a hitman mod to the pump handle.
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Opinions?

second sterling. Red either bronze or old stp not sure. Handle has what looks lide original set screw holes for bottomline. I know some old stps had a back bottle asa, but then ran a hose down from an adapter in order to bottonline. The frame spacer seal was bad, but I managed to fix the leak by jb welding the hole in the frame. Don't worry its nice and clean and no leaks. It doesn't have velocity adjusting aside from messing with the springs so that kinda points to a bronze. Pump handle is a glossy hard plastic from what I can tell. I added the return spring and previous owner added agd rubber grips. So my questions. How much do you think it is worth? by itself, with the Smart parts barrel? Is it worth selling or should I just bottomline it. My only reason for keeping it would be for my wife if she likes playing with a pump enough in order to keep around something better than my sl-68II.







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Old 02-27-2012, 12:05 AM   #2 (permalink)
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does the red have a brass sleeve inside the barrel?
I think it is a original stp Sterling Turbo Pump.. I've got a nice red one myself that looks like a twin to yours.
your probably in the 150-200 ballpark.

the top one has a velocity adjuster I take it..

I personally hate return springs on sterling's they ruin the lightness of the stroke..
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Old 02-27-2012, 10:13 AM   #3 (permalink)
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no brass sleeve as far as I remember. I don't have it in front of me atm, but pretty sure it just has red ano inside.

yeah, top one has velocity adjuster through the pump rod.

the return springs were more to keep the black one from bouncing open while running. It isn't strong enough to keep the pump totally forward when firing. The red sterling pump stroke is smooth but heavier than the black one, I think the internals need tuning. Any ideas on getting springs and a proper spring balance? Right now all internals are stock and the main spring is pretty heavy.
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Old 02-27-2012, 11:01 AM   #4 (permalink)
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For springs, I use spyder main springs. Cutting them down to match the sterling main will give you a valve spring of the same tension.
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Old 02-27-2012, 11:14 AM   #5 (permalink)
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I too have both models..although oldironmudder is right spyder springs cut down work great for the older models. For The sterlings with the velocity nut I recommend springing with factory springs the pump stroke is like that of a t2..
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Old 02-27-2012, 12:26 PM   #6 (permalink)
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okay so spyder springs would work, but if I put a lighter main spring wouldn't I need to lighten the valve spring and if so any suggestions? This is all in regard to the old red one. The black pump stroke is amazing as is.
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Old 02-27-2012, 12:32 PM   #7 (permalink)
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The STP style sterlings with stock springing should sweet spot at around 500 PSI, but YMMV.
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Old 02-27-2012, 12:52 PM   #8 (permalink)
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Good to see that red one still in circulation. I think the non sp barrel is sleeved
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Old 02-27-2012, 01:53 PM   #9 (permalink)
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Theres a few still in the wild
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Old 02-27-2012, 02:33 PM   #10 (permalink)
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Quote:
Originally Posted by Tinman View Post
Theres a few still in the wild
Mine is going to hit the air ball field in April for a tourney. Gotta be different & front a pump team in a semi game.
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