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Old 02-21-2013, 06:48 PM   #4 (permalink)
Are we there yet?
Dknight's Avatar
Join Date: Jun 2011
Location: NorCal

I swapped out the whole lower tube internals on my j2 for the new style internals all in one shot. Got the loud "fart" shot with older internals when I put a pump kit on. The old an new valves operate at the same 300-350 psi, cup seal material didn't really matter to much they were based off of when they were cockers. I will say the new internals produce a very consistent and pretty quite shot.
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