Originally Posted by Docsgsxr
Tango, what kind of Ac system are you using? I want to install something to run off my motor to cool the driver's area when I am driving, but don't know what I should look for. I was thinking something off an SUV would suffice, but didn't know how easy it would be to have lines manufactured to go from the back of my MVP to the driver's area.
for my old bluebid I built custom dash air into my Defrosters.. I dont know on your bus if your defroster vents are slots across the windshield or the round twistable vents.. on my bird they were twistable.. so I fashioned a honda civic evaporator into the intke side of each defroster unit.. and used plastic drain pans under each one with a rubber hose going out through the floor and slanting toward the back of the bus.. so it sucked the water out easily when driving.. I ran a sanden 508 compressor .. since that bus had a chevy 454 it was easy to find a hang-off bracket set for the compressor...
in summer I swivelled the round vents on the driver side around to me and it kept me nice N cool.. in winter if I turned on the compressor it acted as a dehumidifier and I never had fogged up windshields...
another route to go is a Limo Base unit which is often ductable with flexible hose.. and angle-bracket style mounts are made for vents so you can run flex-hose up from the evaporator to wherever you want the vents.... (which in most busses theres planty of room for a small unit under the dash.. )
and yet another way is a Jeep Wrangler YJ / CJ under-dash unit.. you can even often find the indoor pieces of those in the bomeyard from wrecked wrangler YJ's.. IHC scouts and jeep wagoneers used a nicer version and can still be found occasionally...
I will caution about using a front radiator mounted condenser on a Diesel Bus though.. most older busses use a mechanical / thermal fan clutch for the radiator fan and has a hard time "sensing" that the A/C needs cooled.. so you can run some pretty high head pressures if your bus engine is "cold" but the bus interior is HOT.. (ie you go out at noon to drive after it sat all night and its blasted hot in the sun.. cold engine hot bus.. High A/C load.. fan clutch likely going to not spin your fan very fast).. so you may want a "pusher fan. electric" on the front of your condenser. if you have an electric / air fan clutch you can fit a pressure switch so the fan is called for whenever the A/C requires it..
another thng is that on many busses the turbo inter-cooler is Beside the radiator up front.. so locating your condenser in front of this may result in the intake air charge for your engine being warmed up quite a bit when the A/C load is high..
my old bus was Gasoline and I had installed a 5000 CFM Lincoln Mark VIII fan to cool it with a vari-speed controller I built so I had a sensor in the A/C to monitor...
I dont know if an electric Mark VIII fan would cool a Bus or not.. im unsure of the CFM of belt-fans on these busses..
just some pointers.. I plan to tie into my skirt-mounted condensor on my newest endeavor to run an evaporator for the front.. so i wont need one in front of the motor..
you can run multiple evaporators in PARALLEL with a single condenser and compressor as long as you use TxV valves to regulate the refrigerant flow through each evaporator.. running closed-loop is even better but much harder to "dial-in"..