anyone got a twin groove pully for A/C

Final version, fabricated left side compressor bracket

Here's my final version, fabricated driver side A/C compressor mounting bracket . . . picture explains all!

On to the mockup of the required passenger side alternator bracket!

Update and thanks to donors . . .

Quick update on Kadett A/C compressor and "moved" alternator mods thus far.

Received A/C dual crank pulley and WP fan spacer from Gene . . . thanks. Didn't realize how handy that spacer would turn out to be until working out new accessory drive belt paths later on. BTW, thanks also to Dave for sending his dual pulley, it will be used, but for a different project.

Fabricated passenger side alternator mount from '68 cast iron airpump mount . . . thanks Rodney. Purchased '75-'83 Scirocco "deep cup" alternator pulley for correct belt path and to solve alternator fan to WP intake hose clearance problem. However, now rear crank pulley/WP/PS alternator belt path exhibited interference at WP intake (lower radiator outlet).

Initially thought about solving problem with idler pulley but found better solution by driving only PS alternator from rear crank pulley and fabricating 1/2" thick WP pulley spacer from original A/C WP fan spacer . . . again, thanks Gene. Used this spacer between WP drive flange and pulley to move WP pulley forward by 1/2" and now aligning belt path to drive both A/C compressor and WP off the crank front pulley.

Due to the larger front crank pulley, WP speed will be increased ~10%, aiding coolant flow at idle . . . not exactly a bad thing down here in Texas! "At speed" engine RPM is lower than other models due to the Kadett automatic's 3.18 gearing. The result is that the WP now will turn at about the same speed at 70MPH as our 3.44 geared cars do.

Again, thanks again to all who helped out this far with parts and stuff. A few finishing touches to these pieces and then on with the rest of the Kadett A/C installation. Once I've installed these pieces in the actual car, I'll post some pics. So far, I'm pretty pleased with how it's going . . . although it's taken quite a bit longer than planned to get here.

Latest Kadett A/C install update pics

Might give others considering A/C some ideas, so here's my latest Kadett A/C WIP report with pics:

1. Right side alternator installation: installed regulator on right side radiator frame, extended correctly color coded alternator wiring loom, mounted '80s Scirocco extended alternator pulley, cut 1/2" off lower radiator hose for pulley clearance, modified '80 Accord alternator fan guard, modified '68 air pump bracket and fabricated alternator belt adjustment bracket. Alternator is driven by a single P/N 13300 V-belt off the back A/C dual crank pulley.

2. Left side compressor installation: machined original alternator bracket for use with ND10P08E A/C compressor, machined .540" WP pulley spacer and modified stock alternator belt adjustment bracket. Compressor and WP are driven by a single P/N 15375 V-belt off the front A/C dual crank pulley.

3. Front of radiator condenser installation: trimmed front of radiator sheet metal for condenser clearance, welded two GM O-ring style fittings to condenser in place of hose barbs, fabricated condenser mounting brackets, cut two holes, 1" and 1.375", in radiator mount sheet metal for A/C hoses and fabricated 'high-side', compressor-to-condenser O-ring style hose assembly.

4. Left side receiver/drier installation: modified '80 Accord coil mounting bracket to fit slightly larger diameter receiver/drier, mounted assembly to back of left side radiator mount sheet metal, fabricated 'high-side', condenser-to-receiver/drier O-ring style hose assembly.

Clutch fan fabrication for Kadett

Just installed my 'one off' fabricated clutch fan and thought I'd post the fabrication dimensions, parts used and my reasons for bothering with this.

First, a little project background. After fabbing all the pieces to remount the alternator at the pass side and mount the compressor on the driver side in my Kadett, I found I could not drive both the alternator and water pump off the crank dual rear pulley as is normally done with the alternator on the driver side . . . WP belt path clearance issues with pass side alternator.

Solved this by only driving pass side alternator from crank rear pulley and driving WP and compressor from the crank larger front pulley and using .550" to space WP standard pulley and fan blade forward for crank pulley and compressor clutch fan blade clearance and WP belt path alignment with crank front pulley.

All of this worked fine for my stock, solid mounted, 5-bladed fan. Since front crank pulley is ~13% larger than the stock pulley, the WP and fan are driven ~13% faster. Not necessarily detrimental as far as the WP is concerned, especially down here in Texas, but not a real good solution where the fan is concerned . . . additional drag from higher driven speeds.

Decided to look into mounting a clutch fan to negate the additional drag from the solid mounted fan. Anything you can do to reduce loading on the engine is beneficial from all points of view and especially so with a completely stock engine like my Kadett's. Another consideration was that I wanted to be able to use any stock '68-'74 water pump, not the special '75 'clutch fan' pump with its fixed position, non-removeable drive pulley.

Had a fan clutch (any 3.0 engined '72-'79 BMW) from a previous 'U-Pick' used parts emporium foray, an ~'80s Opel CIH clutch fan adapter WP pulley and an asymetric five-bladed black plastic fan blade from Germany and a stock WP pulley. These are the four items I used to fabricate my Kadett clutch fan assembly to use with a standard '68-'74 CIH water pump since belt path is altered.

Took three tries to get all clearances right, so I won't bore you with details of the first two attempts. Here's my final version in detail:

1. Machined the outer fins off the BMW fan clutch to fit inside the Opel CIH fan blade mounting recess. Without those fins, everything fits exactly!
2. Mounted machined clutch to asymetric 5-bladed Opel fan assembly with eight 1mm washers to space fan blade backwards on clutch by 2mm.
3. Machined entire pulley assembly spot welded to the rear of the Opel clutch fan adapter/pulley off the adapter.
4. Machined .200" off nose and stepped shoulder of clutch fan adapter for clutch face to radiator clearance.
5. Enlarged center hole of stock WP pulley to fit around adapter shoulder.
6. Machined .355" thick spacer to fit around adapter shoulder and adapt pulley to altered belt path.
7. Mounted spacer and WP pulley on adapter with bolts and welded pulley to adapter mounting flange.
8. Removed bolts and machined .455" from front of pulley mounting face, pulley mounting face sheet metal is .100" thick.

Mounted finished clutch fan assembly and road tested it. Initial results very positive . . . woohoo!! :yup:

And now for some 'seat of the pants' observations: my stock 1.9 automatic with 3.18 gear . . . floored standing start over same distance end speed:

1. Original stock single crank pulley, fixed 5-blade fan on water pump and stock alternator - 44 MPH
2. Dual crank pulley with alternator drive at same speed as stock and WP and fixed 5-blade fan overdriven by ~13% from larger front crank pulley - 42 MPH
3. Dual crank pulley with alternator drive at same speed as stock and WP and 5-blade asymetric clutch fan overdriven by ~13% from larger front crank pulley - 47 MPH

It's been a while . . .

Got a bit sidetracked with my 'sprint' installation in the same car but in another thread, so I thought I'd update the latest changes that are directly A/C related here.

I had purchased a complete Kadett ARA interior evaporator housing, air ducting and controls unit a couple of years ago with the intention of installing it in my '69 LS. Like many projects installed over time, I discovered a much better way of installing the interior A/C pieces required to complete my heating/AC installation, not as 'original', but a solution infinitely more functional and elegant.

This revised approach requires a battery relocation from the stock, passenger-side shelf at the firewall where space is needed for that and the reason for this post, pictures. The first pic shows my initial solution where battery is mounted with two threaded rods for the stock hold-down bracket, the second shows my final solution using the original "J" hooks.

I went with a "side-post" battery and terminals to avoid the potential hood clearance issues with a traditional "top-post" battery. Also had to trim the inside of the original hold-down bracket to fit the new battery . . . still looks "stock" though!

When I am ready to proceed with that approach, I will document it fully with pictures in a new thread, but the installation is Kadett specific . . . sorry. Guess I'll offer the ARA piece for sale in the ad section here at some point for anyone interested. It's the only Kadett specific unit that I've ever seen besides the one in Rick's '67 Kadett Caravan, the original "GM A/C mule" (development vehicle) and likely the only 1.9 CIH Powerglide in the US!