[encantotom]

hi all,

in my quest for rebuilding air solenoid valves for the leveling system i have discovered a few things.  i have run across 4 different solenoids that were used.  3 can use the rebuild kits i make and 1 cannot.  

the 3 that can have very similar brass main bodies.  however the orfice cavity is slightly different on each.  2 of them (the newer ones) have a smaller orfice than the older KIP valves like was on my 90.  

still functionally identical other than the older kip valves let air in or out just a little faster.  

so there is the basis for my question.  the rear of the coach weighs alot more for sure and on mine, it raises slower than the front does.  there are 6 airbags on the back and 2 on the front on mine.  i am thinking of using the bigger orfice valve bodies for the RAISE function on the rear six pack.  anyone see any issue with that?

tom

[Fulltiming]

It would be interesting to time it before and after the change. I would think that the limiting factor might be in the size of the incoming air supply line but there are certainly multiple variables in play and a larger valve orifice might make some difference.

[Richard]

I don't see an issue, but I also think that only a recovering engineer will be able to tell the difference.

[77newell]

I can't see a problem in terms of fore and aft leveling. In terms of side to side I think it might help divert more air to the rear thus preventing the front airbags from trying to rise too far or getting ahead of the rear which puts twist forces into the frame.