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king arms m4 big rps loss

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Old April 28th, 2012, 19:14   #1
Hawke519
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king arms m4 big rps loss

Hey guys hopefully someone can help me out. I recently changed my cylinder,piston, piston head and cylinder head. The gear box was re shimmed and once it was all back together I have gone from 27 rps to 19 rps.

The gear box doesnt seemed to be shimmed to tight it spins perfectly when the piston is out. It probably does about 3-4 revolutions when the case is together if you try to spin it. Do king arms need to be shimmed looser then other gearboxes or something? I just cant seem to figure out how I'm losing 8 rps.

Thanks
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Old April 28th, 2012, 19:56   #2
XZIVR
 
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What piston did you put in? Was it some heavy ass monstrosity?
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Old April 28th, 2012, 20:14   #3
ThunderCactus
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did you re-adjust your motor height after shimming?
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Old April 28th, 2012, 20:38   #4
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If you installed a full-toothed metal piston, and used the same spring, you added more weight to the system AND more pressure from the bearing piston head and spring guide.

Also what Thunder said.
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Old April 28th, 2012, 21:30   #5
Hawke519
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I put in a modify ultra high speed piston.

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What piston did you put in? Was it some heavy ass monstrosity?
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Old April 28th, 2012, 21:31   #6
Hawke519
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Ya i have adjusted the motor height from one end to the other and haven't noticed a change at all.

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did you re-adjust your motor height after shimming?
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