Originally posted by steveg
perhaps the only real difference will be a smaller stem on
the bolt and changes to the powertube tip, spacers and o-ring
the standard o-ring right now is a #010 with a nominal 1/4"
hole. at 400psi pressure that means about 19.6lbs of pressure against the bolt.
if you change the stem to the next size smaller o-ring #009
you have a nominal 7/32 id (0.219") that would have about
15lbs against the bolt.
Or about 4.6lbs less force.
the spring rate of the spring is about 19lbs/in (calculated)
the spring in compressed about 1/2" or about 8.5lbs
so the stock o-ring has 19.6lbs - 8.5lbs(spring) or about 11.1 lbs of ball crushing force.
using the same spring and smaller o-ring, 15lbs - 8.5lbs
for 6.5lbs
6.5 lbs might allow the ball to live.
So new bolt with 7/32 stem instead of 1/4
new powertube tip with matching 7/32 hole.
new spacers with 7/32 hole.
and finally an adapter to hold the #009 0-ring
this adapter will need an o-ring on the outside as well so
to accomodate that,the adapter would have to be almost as
long as the present spacers,therefore the new spacers would
be shorter than the old.
Close?
perhaps the only real difference will be a smaller stem on
the bolt and changes to the powertube tip, spacers and o-ring
the standard o-ring right now is a #010 with a nominal 1/4"
hole. at 400psi pressure that means about 19.6lbs of pressure against the bolt.
if you change the stem to the next size smaller o-ring #009
you have a nominal 7/32 id (0.219") that would have about
15lbs against the bolt.
Or about 4.6lbs less force.
the spring rate of the spring is about 19lbs/in (calculated)
the spring in compressed about 1/2" or about 8.5lbs
so the stock o-ring has 19.6lbs - 8.5lbs(spring) or about 11.1 lbs of ball crushing force.
using the same spring and smaller o-ring, 15lbs - 8.5lbs
for 6.5lbs
6.5 lbs might allow the ball to live.
So new bolt with 7/32 stem instead of 1/4
new powertube tip with matching 7/32 hole.
new spacers with 7/32 hole.
and finally an adapter to hold the #009 0-ring
this adapter will need an o-ring on the outside as well so
to accomodate that,the adapter would have to be almost as
long as the present spacers,therefore the new spacers would
be shorter than the old.
Close?
Also a stronger or longer spring would lessen the impact of the bolt on ball. Or a very light bolt with original spring!! This was something that Tom discussed awhile back!


also, the price will most likely be less than what u predicted because usually when u buy more it costs less. if they are all packaged together, it will cost less than if u bought all the parts individually ...


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