20V MK1 Engine Swap Pulleys : aircon / alternator

AdrianS · 04-29-2009, 04:43 AM

I am planning a 20v (Blacktop) swap into an '88 aw11, and wish to keep it air conditioned. Idling in summer traffic @ 40+ C the cabin heats up fast.

I can't find a definite answer to the following questions on the web :

Which a/c compressor to use - aw11 or blacktop ?
I assume the aw11 compressor is smaller=better, but is it good for 8k rpm, or did they change the pulley ratio ?
Same questions re alternator ?

If using the aw11 compressor / alternator / ac, which mounts should I use ?
Do the pulleys line up (one web site says not) ?
(It probably depends on which mounting brackets I use).

Sorry if these are noob questions, but pulleys 1-2 mm out of line are easy to overlook, and I just got my a/c compressor overhauled, so I want to keep it.

Adrian

tjmr2 · 05-22-2009, 01:01 AM

I'm running the stock compressor and bracket from my 89 and the stock crank pulley. The BT crank pulley wouldn't line up with the AC or alternator. I had the local dealer install a new compressor as mine leaked like a sieve. They had to put on a non stock length belt to get it to work but other than that no problems for a year now.

04-29-2009, 04:43 AM	#1 (permalink)
AdrianS hey you Join Date: Apr 2009 Location: Australia Posts: 43 Thanks: 0 Thanked 2 Times in 2 Posts iTrader Rating: (0/0% )	Pulleys : aircon / alternator I am planning a 20v (Blacktop) swap into an '88 aw11, and wish to keep it air conditioned. Idling in summer traffic @ 40+ C the cabin heats up fast. I can't find a definite answer to the following questions on the web : Which a/c compressor to use - aw11 or blacktop ? I assume the aw11 compressor is smaller=better, but is it good for 8k rpm, or did they change the pulley ratio ? Same questions re alternator ? If using the aw11 compressor / alternator / ac, which mounts should I use ? Do the pulleys line up (one web site says not) ? (It probably depends on which mounting brackets I use). Sorry if these are noob questions, but pulleys 1-2 mm out of line are easy to overlook, and I just got my a/c compressor overhauled, so I want to keep it. Adrian Last edited by AdrianS; 04-29-2009 at 04:49 AM..

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05-22-2009, 01:01 AM	#2 (permalink)
tjmr2 Cage Fighter Join Date: Jan 2008 Location: Colorado Posts: 409 Thanks: 0 Thanked 62 Times in 59 Posts My Google Map iTrader Rating: (0/0% )	I'm running the stock compressor and bracket from my 89 and the stock crank pulley. The BT crank pulley wouldn't line up with the AC or alternator. I had the local dealer install a new compressor as mine leaked like a sieve. They had to put on a non stock length belt to get it to work but other than that no problems for a year now.