you can get deals on the 508, just do a quick search in google. Remember, you will want to change the dryer also. Just a guess but with new hoses made, the dryer, the kit and the pump and vacuum then charge, I think you could do it under 500 bucks total. The local Oriely's is able to make the hoses in my case and he said they would run about 20 bucks each.

Kit = $165 (ship inclu.)
Sanden 508 = ~$150 online
Hoses = $?

A lot depends on how much your cost for parts. If you got with a new/reman compressor it will be right around $315 + your cost for hoses to upgrade to a sanden.

Since you would replace the dryer when you replace any compressor I don't factor that in to the cost of switching to a sanden. I would buy that part if I was putting another R4 in here so I wouldn't count that towards my "upgrade" cost. So far if I got a new compressor this will only cost me a little bit more than what a new R4 runs at the fastlane store. I know you can get an R4 for less than they sell them, but even if it is less I still run the chance of the R4 failing in a couple years.

Here's the price breakdown I came up with.

$165 Compressor mounting kit
$150 Sanden 508 (eBay)
$56 Expansion valve, accumulator, pressure switch
$20 "K" head compressor back plate (eBay)

I haven't priced hoses yet but I'm guessing high at around $100. I also haven't decided what I'll use for refrigerant yet, between Freeze-12, ES-12a, plain 134 or go nut$ on R12. I'm leaning towards the first two though, which are fairly inexpensive and cool better than 134.

All tolled, between $500-600.

I've got a Sanden to sell if anyone is interested. I got it hoping to be able to install it in my OM617 into an R107 project, but I finally had to admit that there was absolutely no room. It's a junk yard pick that came out of an RX7 which appeared to be a retrofit based on fact that the mounting bracket was definitely not factory.

http://www.peachparts.com/shopforum/...1&d=1346428478

Please PM me if you think this might be a solution for you.

Does it have compression or O ring fittings? My radiator shop did not have any compression fittings in stock, so I had to go to a hose shop to get the right fittings. If it is O ring, most all shops carry a selection of fittings. However, if you are changing the back head, it does not matter. The new head (K) will have O ring fittings exiting the rear.

Compression.

http://www.peachparts.com/shopforum/...1&d=1346431296

I would think that the fittings I have would be reusable by just crimping on new hoses. Don't know whether the angles would work, but they might.

I had to get 45 degree fittings. The 90 degree fittings make it too cramped for the oil cooler hoses and A/C hoses in the same area. With the 45 degree fittings, I was able to sneak the A/C hoses in between the oil cooler hoses. It is still very tight, but it works. Rear exiting fittings are preferable.

One of mine might work...

http://www.peachparts.com/shopforum/...1&d=1346439904

I'm keeping the existing JD head and fit the hard line fittings to the existing w123 hose setup.

This is the discharge - high side line fitting that I will bend to attach to the lower hose going underneath the front pulley.
http://www.peachparts.com/shopforum/...1&d=1346443586

http://www.peachparts.com/shopforum/...1&d=1346443598

http://www.peachparts.com/shopforum/...1&d=1346443623

For suction - low side line, I'm going to cut the stock hard coupling to the upper low side line and braze the compressor fitting to it.



.

Want to make an extra set? :D

That might be possible, I have 4 complete w123 Federal lines I could cut up and re-hose. Just need to find more fittings.



.

Come to think of it, I did use the smaller 90 degree fitting (there was enough room), and had to get a 45 for the larger one. If you can remove the old sleeves and hose, then yes, they can be re -used.

I had some time today to mock up the compressor on a spare motor.
Alignment looks good, except for the belt sizing for my specific compressor. Rich, what is the belt size that we have here? I am going to need a shorter diameter belt.
http://www.peachparts.com/shopforum/...1&d=1346652889


The compressor I'm using is a Sanden 7h15 and according to the Sanden catalog for my particular model, it has a 125mm pulley. Once installed and up and running, I have no doubt this belt will stretch. To tighten it up more, the tensioner pulley will eventually hit the vacuum pump.

http://www.peachparts.com/shopforum/...1&d=1346652848



On another note, check out how small this Sanden 7h15 is compared to this original Harrison R4. :eek:

http://www.peachparts.com/shopforum/...1&d=1346652903

http://www.peachparts.com/shopforum/...1&d=1346652930



.

That is a nice tidy compact unit compared to the monster it replaced.
Too bad this wasn`t installed from the factory.

Charlie

The belt that comes with the kit is a 17390 (1/2"wide X 39"). It appears that you need a 3/8 wide belt for your compressor. You may want to find out what vehicle your compressor is used for, and look up the size belt required. Rock Auto is a great resource for finding specifications and looking up part numbers. Thanks for the great photos. They look a lot better than my mock up photos!