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Old 07-09-2013, 08:08 PM   #1 (permalink)
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Pumped 98 internals air efficency

Has anyone here made their 98 a pump? If so can anyone tell me the air efficiency of one (using a 12 gram preferably ). I want to use the 98 for a project due to it's clamshell design and specific parts of its bolt but I want decent air effeciency. I know that they are gas hogs when using the gas blowback action but hopefully they're a tad bit better without it.
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Old 07-13-2013, 01:28 AM   #2 (permalink)
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Quote:
Originally Posted by Charon214 View Post
I know that they are gas hogs when using the gas blowback action but hopefully they're a tad bit better without it.
Depending on How you plan to make it a pump, you might make the efficiency worse.

The most common way that I've seen is to remove the Striker o-ring and attach a pump to the striker/bolt assembly so the marker just Dumps a bunch of CO2/HPA out the cocking handle slot.

You could ( and I suggest this) reduce the amount of blowback gas by enlarging the valve pin or reducing the hole it sits in.

So short answer is I don't have efficiency numbers for a 98 pump
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Old 07-13-2013, 02:16 AM   #3 (permalink)
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Couldn't you just plug the blowback hole? I seem to remember that's what you'd do on the old-school Ebolt mods.
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