Is it a SP seat? If not the correct thickness, it will be a challenge to tune it...
Scubapro 108HP
- Thread starter Open Ocean Diver
- Start date
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OP
Seat is from VDH, it appears almost a 1 mm thicker I made a softer material.
According to the two drawings I have would indicate the cases is a standard 108 with an HP orifice setup. Were you able to upgrade the 108’s back in the day?
According to the two drawings I have would indicate the cases is a standard 108 with an HP orifice setup. Were you able to upgrade the 108’s back in the day?
I have also run into 2 different length orifices....
OP
So it looks like this one was a standard 108 and somebody converted it to an HP.
The HP drawing shows the rubber cover is the same as the BA, however this one has the 108 rubber cover with the HP demand valve body and orifice. Hmmm
Does anyone know if this was a conversion that was accepted by SP?
The HP drawing shows the rubber cover is the same as the BA, however this one has the 108 rubber cover with the HP demand valve body and orifice. Hmmm
Does anyone know if this was a conversion that was accepted by SP?
OP
I see the conversion kits for the adjustable but I don’t see any for the 108.
The 109- to-156 conversion kits were to make it balanced, a then significant development which became a standard in production.....
I don't remember the timeline, but later on, the G200 could similarly be made a G200B (new poppet, spring and balance chamber), and either of these could also be made into a G250 with an air barrel swap also (tunable externally).
This was the amazing 108-109-G200-G200B-G250(various) design, and later on the G250HP, S555/S600 design, all based on the barrel poppet.
108-108HP-??? (there are later generations, but I don't know them - I always had 109 and variants) is a whole different design, and always unbalanced. R-somethings...
I don't remember the timeline, but later on, the G200 could similarly be made a G200B (new poppet, spring and balance chamber), and either of these could also be made into a G250 with an air barrel swap also (tunable externally).
This was the amazing 108-109-G200-G200B-G250(various) design, and later on the G250HP, S555/S600 design, all based on the barrel poppet.
108-108HP-??? (there are later generations, but I don't know them - I always had 109 and variants) is a whole different design, and always unbalanced. R-somethings...
Rusty Shackleford
Contributor
108s don’t have a barrel, they are analogous to the R-190 like the 109/156 is the tie G-250.
@Open Ocean Diver Your 108 does not require the insert.
That was not unheard of and probably a good idea.
Some of the earlier 108s had a different lever, diaphragm, and diaphragm cover. The important thing is lever height. If the diaphragm sits just on top of the lever-or just a tad above it, you should be good. Add another washer to the stem, that should solve your low spring tension issue.
That was not unheard of and probably a good idea.
I don't know.
Some of the earlier 108s had a different lever, diaphragm, and diaphragm cover. The important thing is lever height. If the diaphragm sits just on top of the lever-or just a tad above it, you should be good. Add another washer to the stem, that should solve your low spring tension issue.
OP
