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Registered
Join Date: Oct 2002
Location: St. Louis region
Posts: 3,149
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In that case you'd be smart to replace and upgrade the entire system. Definitely replace all the hoses with the newer barrier style; you can buy all-new (about $300) or have new hose installed on your original ends (about $150). Definitely replace the receiver/dryer, and at a minimum clean/blow out your original condensers and evaporator. From this point you can recharge with the original R12 or go to R134.
Beyond that every other upgrade will provide better performance. A bigger serpentine front condenser, a bigger serpentine evaporator, and a Procooler (cooled reveiver/dryer) will help a lot. The addition of another condenser (in front or behind the left rear wheel) would be about as far as you need to go. Additional cooling fans on the rear condenser will help too, as does sealing up all the ductwork. R12 still performs better than R134, IMO. These systems can use a lot of improvement and each step helps. Biggest problem is insufficient condenser area.
There's a ton of info available here - I'd suggest a search.
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Deceased: Black '88 Carrera Coupe, Steve Wong and Russell Berry chips, Dansk premuffler, custom MK GT3-style muffler, Magnecores. Al Reed 7 & 8 X 16 Fuchs. Full Elephant Racing suspension, 21/28 T-bars, Turbo tierods, bump steer kit, Bilstein Sports, BK strut bar. Ruf bumpers, 935 mirrors, Carrera 3.0 tail, DasSport bar.
'11 BMW 328iX, '18 Nissan Frontier 4X4, '92 Acura NSX.
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