I just redid the A/C on an 87 turbo buick. New comprssor, accumulator, orifice tube. It works well and is cold but I can really feel it engage and disengage like it puts a good load on the car. When it disengages its like it gets more power and a load is taken off. Is this normal? It's been so long since I've driven one of these where the a/c works so I don't know what's right and what isn't.
Noticeable drop in power when A/C compressor engages
- Thread starter MRP78
- Start date
I converted mine to R134 and the compressor seems to kick in and out a lot which seems to make this more noticeable. The higher the engine revs the more it does this and a lot of times it's quick. I'm wondering if I may need to change some kind pressure valve too. Maybe the high pressure valve because of the differences in pressures between R12 and R134?
Buick Mark
Active Member
- Joined
- Sep 12, 2001
The AC compressor does put additional load on the engine, most cars you WILL feel it.
I dont know if your old enough to have experienced the older A6 compressors GM used, but they put a HUGE load on the engine, back in the day, I remember hearing about a 30 h.p. load
I dont know if your old enough to have experienced the older A6 compressors GM used, but they put a HUGE load on the engine, back in the day, I remember hearing about a 30 h.p. load
Mike T
Well-Known Member
- Joined
- May 3, 2013
Mine pulls the motor down a little but your IAC should compensate for any big changes in rpm.
The A6 was a good but heavy compressor, they even had a small oil sump on the bottom.
The AC compressor does put additional load on the engine, most cars you WILL feel it.
I dont know if your old enough to have experienced the older A6 compressors GM used, but they put a HUGE load on the engine, back in the day, I remember hearing about a 30 h.p. load
The A6 was a good but heavy compressor, they even had a small oil sump on the bottom.
