a/c delete, 2 alternators?

[TDDrew]

Hey, I'm removing the  a/c from the 79 2door rabbit (1.5 diesel).  I was wondering if I can use the current alternator with the non-a/c alt brackets. Will the gasser 8valve alt brackets and stuff work?
Just another though: can we run dual alternators?

thanks,
Drew

P.S. If anyone want the a/c I am posting it in the for sale section.

[jtanguay]

i thought of this myself... and switching to thermoelectric refrigeration system  :lol: i think it could work, but a different belt may be required.  on your 1.5 you would need a different pulley on one of the alts though.  but if it was a serp setup it would be a bit easier.

[gigaz2]

its a huge nonsense, every time you transform a form of energy into another there is a massive efficiency issue.

normal ac uses mechanical energy (crank) to compress the refrigeration fluid (or gas) and when it expands, it takes the heat with it to the front of the car.
thats a purely mechanical process (very efficient one)

alternators have mechanical drag, and a low efficiency (in the order of 40%)
two alternators have twice the drag, twice the weight, even more inefficient.

consider fitting a bigger alternator to replace the stock one.

[TDDrew]

its a huge nonsense, every time you transform a form of energy into another there is a massive efficiency issue.

normal ac uses mechanical energy (crank) to compress the refrigeration fluid (or gas) and when it expands, it takes the heat with it to the front of the car.
thats a purely mechanical process (very efficient one)

alternators have mechanical drag, and a low efficiency (in the order of 40%)
two alternators have twice the drag, twice the weight, even more inefficient.

consider fitting a bigger alternator to replace the stock one.

How about swapping to an alt with a 1 way clutch?

Haha, I was just going to use a small house a/c unit with  a power inverter. Don't really need two alts, but would be cool for the big sterio guys.

[jtanguay]

its a huge nonsense, every time you transform a form of energy into another there is a massive efficiency issue.

normal ac uses mechanical energy (crank) to compress the refrigeration fluid (or gas) and when it expands, it takes the heat with it to the front of the car.
thats a purely mechanical process (very efficient one)

alternators have mechanical drag, and a low efficiency (in the order of 40%)
two alternators have twice the drag, twice the weight, even more inefficient.

consider fitting a bigger alternator to replace the stock one.

How about swapping to an alt with a 1 way clutch?

Haha, I was just going to use a small house a/c unit with  a power inverter. Don't really need two alts, but would be cool for the big sterio guys.

in that case you just need a big ass capacitor.   :wink:

[Dirtrag2]

a big ass cap and an alternator that pushes 90amp. most VW are 45 or 60amp.
my setup has a 60 amp alt, 1farad cap and 4 gauge wires and lights still dim

[oldskool rich]

im running a 140 amp alternator, theres no way anything cud use that much power, you can get vag ones up to 190 amp and water cooled.

only use a clutched alternator, 2 normal ones will mess up ur mpg, slow you down and break your crank pully

[gigaz2]

a big ass cap and an alternator that pushes 90amp. most VW are 45 or 60amp.
my setup has a 60 amp alt, 1farad cap and 4 gauge wires and lights still dim

you need a bigger battery or your wiring repaired, bad grounds do that, stereo gets all the power, rest of the car doesn't.

[BlackTieTD]

headlight relays

[gigaz2]

I'm after a nice kit like this:
http://cgi.ebay.co.uk/vw-golf-mk2-headlight-wiring-loom-upgrade-kit_W0QQitemZ270271439374

but I found out that the problem was my ground connections.

EDIT: fixed link

[molgrips]

normal ac uses mechanical energy (crank) to compress the refrigeration fluid (or gas) and when it expands, it takes the heat with it to the front of the car.
thats a purely mechanical process (very efficient one)

alternators have mechanical drag, and a low efficiency (in the order of 40%)
two alternators have twice the drag, twice the weight, even more inefficient.

The Prius uses an electric compressor for its aircon, and it's pretty efficient.  No noticable difference in MPG.  Ok so it's designed for it, and alternator drag isn't much of a problem, but it means that it only draws the power it needs, and there aren't mechanical belt losses etc.  Might not be so good in a car that doesn't have great big generators running all the time tho

[jtanguay]

i wonder why they don't use thermoelectric cooling... phase change does have a greater capacity for the space though, and uses the refrigerant to isolate the heat far away from the evaporator... maybe it will take time to refine the technology...