I have upgraded to r134 on my 86 325es with a Seiko compressor out of 91 325i. The air blows cold on the highway even in 90 degree weather. But as soon as I get in stop and go traffic it's not that cold. I am thinking it's the old style condenser? Is it worth the effort to install a parallel flow condenser? Or any other modifications that I might want to consider? The aux fan is definitely working!
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Is it worth it to upgrade to parallel flow condenser?
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It helps a little, but unless you go to an oversized unit, it's not going to help that much.
Bypassing the aux fan resistor (you'll also need to up the fuse to match the high speed fuse, 30A IIRC) makes a lot more of a difference.
Even then, I can tell you that it's not going to be perfect when stopped. I have high speed aux+sanden compressor+PF condenser in my 325is and while stopped in 100 degree weather, it blows about 60 degrees. When moving, I get down to the 40-42 that the thermal probe allows.2006 GMC Sierra 2500HD 4WD LBZ/Allison
2002 BMW M3 Alpinweiß/Black
1999 323i GTS2 Alpinweiß
1995 M3 Dakargelb/Black - S50B32/S6S420G/3.91
1990 325is Brilliantrot/Tan
1989 M3 Alpinweiß/Black
Hers: 1996 Porsche 911 Turbo Black/Black
Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd
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Originally posted by alpinewhite318i View PostI have the earlier version of the aux fan resistor that has the red and black wire screwed onto it. How do I bypass it? Or can I just reverse the red and black wires were the connect to the resistor?
Note that this can and probably will reduce the life of your aux fan.2006 GMC Sierra 2500HD 4WD LBZ/Allison
2002 BMW M3 Alpinweiß/Black
1999 323i GTS2 Alpinweiß
1995 M3 Dakargelb/Black - S50B32/S6S420G/3.91
1990 325is Brilliantrot/Tan
1989 M3 Alpinweiß/Black
Hers: 1996 Porsche 911 Turbo Black/Black
Hers: 1988 325iX Coupe Diamantschwartz/Black 5spd
sigpic
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