looking to add AC to '68 911

[Dan Morton]

I need AC here in Houston! My '68 did have AC sometime in it's past as evidenced by the holes cut in the passenger foot well and brackets in the engine compartment.

I need to buy all AC components including vents. What recommendations do people have for complete kits or possibly buying from multiple vendors?

No need to be correct to the year but I would it to look like it came from that era.

I've looked at retro air and rennaire sites and it looks like both are good however retro air appears to have the vents too.

Thanks,
Dan

[brads911sc]

combo of Rennaire and Griffiths and ZIMS. They all make some components that you need here in Houston... I used the Rennaire for my basic kit because they are cheaper than Griffiths and its the same stuff.. A sanden is a sanden...
I used ZIMS for the suplemental condensor.
I used Griffiths for the Kuel vent, the high output evap fan.
Also get the Rennaire procooler and dessert duty front condensor.
Use OEM deck lid condensor.. the after market ones dont fit right. Our host sells it for a reasonable price.
Looking at 3k plus...
Still wont be like a honda...

[chamilun]

you hear so much about a belly condenser and how well they work. If I were starting from scratch, I'd look in to that.

[Grady Clay]

Brad is right on.

Add a throttle positioner or a hand throttle.

Change the fan and crank pulley to get the 1.82:1 ratio. This will help keep the engine cool with the added condenser heat load and will help lower the condenser temp.

It takes extra hose but the system is improved with the deck lid condenser last in a sequence of condensers.

There is a heat exchanger designed to use the cool, low-pressure gas after the evaporator to further cool the high-pressure gas just prior to the expansion valve. I forget the name but it adds to the efficiency and function.

A ’68 doesn’t have much (any) insulation.
If you have the car apart, this is worthwhile addition.
Make sure your door and hood gaskets fit properly.

Best,
Grady

[MichiganMat]

I've got the engine bracket for the compressor for sale if you're interested, no compressor however.

[mpetry]

I've got an OEM condenser (inside the hood) and compressor for sale, I'll do both for $100 plus ship, mostly because these things are a PITA to box up.

[Neel]

You just ripped the lid off of can of worms, again.. Don't forget, A/C leads to higher engine temps.. So you should consider an additional oil cooler, probably a front mount one.. We can spend your money in a hurry.. Cold costs $$$, how cold do you want to be??

[brads911sc]

Not needed. I have all of this and never get past 8'oclock on the temp guauge even in 95 ambients. I do have the front trombone that was standard on the SC. Not sure what a 68 has. Grady's fan solution probably fixes that... IMHO the key to lower temps if to have enough condensor volume so that by the time it gets to the engine compartment its a mute point... ZIMS supplemental does that... Works great and is better than Griffiths because its not sitting on top of the exhaust.

Originally Posted by Neel

You just ripped the lid off of can of worms, again.. Don't forget, A/C leads to higher engine temps.. So you should consider an additional oil cooler, probably a front mount one.. We can spend your money in a hurry.. Cold costs $$$, how cold do you want to be??

[HarryD]

My OEM Setup has the decklid condenser plus a small condenser (with blower) in the front.

The dryer goes in the left front wheel well.

Be sure you get the wiring harnesses and fuse blocks as well.

If ytou can, get a look at an early 911 with AC to see how it all goes.