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> Doug's A/C System, R&D/Build Thread
friethmiller
post Jul 31 2021, 09:21 PM
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Here's the final mock-up of the A/C compressor before installing the engine. Two things I learned here. 1) Tacking the legs to the mount with the compressor installed and lined up worked very well and saved a bunch of time; 2) the oil filler tube is going to be in the way of the compressor and something will need to be modified. I know Doug extended his filler tube to accommodate the compressor. I'm going to see I can get a flat allen head bolt to provide enough clearance for the oil filler cap to screw on. The last pic shows how I tried, and failed, to get enough space from grinding down the offending compressor bolt.

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djway
post Jul 31 2021, 10:37 PM
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If you shorten the filler would it clear?
I used epoxy or JB weld.
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76-914
post Jul 31 2021, 11:00 PM
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Does that bolt screw into a nut welded in place or a tapped opening on the bracket? If so maybe use an elevator bolt and nut one diameter smaller to pass through? (IMG:style_emoticons/default/beerchug.gif)
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914sgofast2
post Aug 1 2021, 08:09 AM
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How are you going to set and check ignition timing with the ac compressor mounted right over the timing port?
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friethmiller
post Aug 1 2021, 10:47 AM
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QUOTE(914sgofast2 @ Aug 1 2021, 09:09 AM) *

How are you going to set and check ignition timing with the ac compressor mounted right over the timing port?

As mentioned before by Doug, the timing can be set/checked with the hole at the back of the case against the fly wheel. I did that by rotating the engine to the timing mark and then painting that spot on the flywheel. You can also remove the compressor from the mount with just 4 bolts.

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friethmiller
post Aug 1 2021, 11:09 AM
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QUOTE(djway @ Jul 31 2021, 11:37 PM) *

If you shorten the filler would it clear?
I used epoxy or JB weld.

Perhaps. Could also get a inch bigger belt so the compressor would be above the cap. Going to wait and see how much room I have in the engine bay once the engine is installed.
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friethmiller
post Aug 1 2021, 11:15 AM
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QUOTE(76-914 @ Aug 1 2021, 12:00 AM) *

Does that bolt screw into a nut welded in place or a tapped opening on the bracket? If so maybe use an elevator bolt and nut one diameter smaller to pass through? (IMG:style_emoticons/default/beerchug.gif)

The offending bolt is a compressor bolt (back housing). I believe it’s an M8 with a fine 1.0 pitch. It might be hard(er) to find in a flat/low profile replacement. I’ll check with Belmetric and see what they have.
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Warren914
post Aug 1 2021, 01:22 PM
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Why are you mounting the compressor on top of the engine? SD7H13 and similar will mount to the side closer to the battery. I've seen photos and it looks good. Gilmore Enterprises sells the mounts!
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friethmiller
post Aug 1 2021, 09:01 PM
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QUOTE(Warren914 @ Aug 1 2021, 02:22 PM) *

Why are you mounting the compressor on top of the engine? SD7H13 and similar will mount to the side closer to the battery. I've seen photos and it looks good. Gilmore Enterprises sells the mounts!

Because I don’t want to cut into the side of my engine bay and tin to side mount the compressor. I just spent way too much time repairing/replacing all the metal in the engine bay. It’s a better location for me. You can certainly go that route if you want.
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ChrisFoley
post Aug 2 2021, 04:37 AM
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QUOTE(friethmiller @ Aug 1 2021, 11:01 PM) *

QUOTE(Warren914 @ Aug 1 2021, 02:22 PM) *

Why are you mounting the compressor on top of the engine? SD7H13 and similar will mount to the side closer to the battery. I've seen photos and it looks good. Gilmore Enterprises sells the mounts!

Because I don’t want to cut into the side of my engine bay and tin to side mount the compressor. I just spent way too much time repairing/replacing all the metal in the engine bay. It’s a better location for me. You can certainly go that route if you want.

An AC compressor in the stock location interferes with the HE on my header, so your choice to move it was perfect.
I did some development on a top mounted AC compressor but abandoned the project. This looks good.
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friethmiller
post Aug 2 2021, 07:19 AM
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Wow! Glad I went this route. Thanks, Chris. All credit goes to Doug (dlee6204) who started this thread. The pulley standoff was based on his design and he went out of his way to assist me in modifying the compressor mount for my Sanden 508 compressor.
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friethmiller
post Aug 4 2021, 08:43 AM
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Ok, I have had a few questions about the A/C mount and how I assembled everything. Since the dimensions b/w the mount ears on the Sanden 508 is approximately 82mm (pic 1), the two side pieces between the U-shaped brackets were cut to 80mm (pic 2). These two pieces slot into the U-shaped brackets to give an overall width of 80mm (pic 3). Note, before welding these four pieces together, alignment should be checked against the blower assembly. Make sure the U-shaped bracket at the back has the relief to go over the timing hole plug (pic 4). For mounting the legs, I tacked the smallest one on first and then with the compressor on the mount on the engine, I tacked the other legs on. Keep in mind, having the compressor belt or a string mounted over the pulleys is very helpful for alignment. Removing the mount, I then finished welding the legs on the workbench. I did one more final fitment just to verify everything before priming and painting the mount.

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AZBanks
post Aug 4 2021, 04:11 PM
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I used the Gilmore mount and a Sanden sd5h11 compressor and I did not have to cut the engine shelf.
I did have to cut the rubber attached to the shelf and the engine tins.

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AZBanks
post Aug 4 2021, 04:14 PM
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I'm not trying to hijack the thread, just wanted everyone to know that you can fit some compressors on the side without cutting up the engine shelf.

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friethmiller
post Aug 4 2021, 06:48 PM
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@AZBanks , very cool! Good to know on the side mount. Your engine/compressor look great. Best of luck getting everything running. I know I still have a lot to do and figure out on mine.
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michelko
post Aug 20 2021, 02:05 AM
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QUOTE(friethmiller @ Jul 31 2021, 07:21 PM) *



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Hi that is a very clean setup. Can you number the diameter of the pulleys?
Regards Michael
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friethmiller
post Aug 23 2021, 09:06 AM
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QUOTE(michelko @ Aug 20 2021, 03:05 AM) *

QUOTE(friethmiller @ Jul 31 2021, 07:21 PM) *



Hi that is a very clean setup. Can you number the diameter of the pulleys?
Regards Michael


Unfortunately, I cannot easily get to the pulley with the engine in the car now. I'll try and see what I can do this evening. I'm thinking the bottom (crank) pulley is about 4" (approx. 100 mm).
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friethmiller
post Apr 8 2022, 07:55 PM
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Alright. My 914 is operational! Turning my attention to finally wiring up all my A/C components. Got to get the A/C cooling before the Texas heat set in down here. I've created a very ugly wiring diagram. Anybody see anything incorrect here? I can run the evap from either the #8 or #9 fuse (switched power) or directly from the battery. I ran a separate 10 gauge wire from the battery to the frunk for the condenser fan. Just need to connect all the wires to the components and the relay. Thanks all.

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friethmiller
post Apr 11 2022, 08:15 AM
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(IMG:style_emoticons/default/icon_bump.gif) Looking for assistance on my wiring before I start hooking everything up. Thanks
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friethmiller
post Apr 11 2022, 12:17 PM
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