Dale Hamilton Posted June 23, 2006 Share Posted June 23, 2006 This is my 3rd AC installation in my B67. This is going to be right- or else! Cab is very tight, heavilly insulated with marine lead foam, all firewall openings sealed or grometted and dark tinted glass. SO, air conditioning should be a piece of cake. Let me relate my experience. During the initial build I installed one of those slick little combination heat/cool units from Old Air Products. These are designed for limited space, as in street rods, and I installed it behind dash, drivers side, replacing the original heater. It fit fine and it worked- sorta. It would blow 50 degree air, but it just didn't have the capacity to deal with a 95 degree day here in the south. These units are "compromise affairs" too small to really cool or really heat. So, I disconnected it, leaving it in place to function on heat only. Next I bought a big underdash unit, cool only. from Vintage Air Products. There is no space under the dash on a B67 of course, but there is space on the floor betwen the two air seat bases, and thats where I mounted it. This was a big improvement, and it could handle 90 degree days just fine. But, it gets hotter than than here, and it was running full blast to keep you marginally cool. Not good enough either. About now I discover that there is a difference in condensors- round tube type for R12 and flat squart tube types for R134. I had the round type. And moreover, mine could not be mounted forward of the radiator- I had to mount it between the frame rails, horizontally just ahead of the 5th wheel- two mushroom fans forcing air through it. This week I swapped it out and installed the flat square tube type. Also broke all the hose fittings apart, cleaned them and installed new O rings- the green ones by the way- not black ones that are only good for freon. Then I buy the biggest cool only under dash evaporator- this from Wheels of Time in Philadelphia. I saw this unit in a buddy's car and it will blow your hat off- really moves alot of air and it has alot of cooling coils. It will go on the floor between the seats. Hopefully I'll get it today and install it this weekend. Will report my further experience. Maybe you chaps can benefit by knowing what does not work. Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.