Difference between heavy duty R4 compressor and light duty?
Thread Starter
Junior Member
Joined: Feb 2004
Posts: 91
Likes: 0
From: Sunny LaCrosse FL
Car: 86 Firebird
Engine: LG4 feedback controlled 350
Transmission: used to be T5 now T56
Difference between heavy duty R4 compressor and light duty?
I see R4 A/C compressors were used in lots of different vehicles from the late 70's to mid 90's.
Some have standard threads, some metric, I've got that part.
Some are listed as "heavy duty" and some as "light duty". Anyone know the difference or why? Higher pumping capacity, designed to run at a higher rpm, higher system capacity??? Lots of different Harrison, Delco and GM part numbers but they all look identical.
Just curious.
Wonder what happens if you use a heavy duty one in a light duty application or vise versa?
Thanks!
Some have standard threads, some metric, I've got that part.
Some are listed as "heavy duty" and some as "light duty". Anyone know the difference or why? Higher pumping capacity, designed to run at a higher rpm, higher system capacity??? Lots of different Harrison, Delco and GM part numbers but they all look identical.
Just curious.
Wonder what happens if you use a heavy duty one in a light duty application or vise versa?
Thanks!
Joined: Jan 2005
Posts: 10,407
Likes: 492
From: Hurst, Texas
Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Difference between heavy duty R4 compressor and light duty?
I see R4 A/C compressors were used in lots of different vehicles from the late 70's to mid 90's.
Some have standard threads, some metric, I've got that part.
Some are listed as "heavy duty" and some as "light duty". Anyone know the difference or why? Higher pumping capacity, designed to run at a higher rpm, higher system capacity??? Lots of different Harrison, Delco and GM part numbers but they all look identical.
Just curious.
Wonder what happens if you use a heavy duty one in a light duty application or vise versa?
Thanks!
Some have standard threads, some metric, I've got that part.
Some are listed as "heavy duty" and some as "light duty". Anyone know the difference or why? Higher pumping capacity, designed to run at a higher rpm, higher system capacity??? Lots of different Harrison, Delco and GM part numbers but they all look identical.
Just curious.
Wonder what happens if you use a heavy duty one in a light duty application or vise versa?
Thanks!
Thread
Thread Starter
Forum
Replies
Last Post
MrPackstin
Interior Parts for Sale
11
Oct 25, 2017 08:09 PM
luvofjah
Engine/Drivetrain/Suspension Parts for Sale
13
Sep 26, 2015 08:28 PM
ac, compare, compressor, compressors, delco, difference, duty, gm, harrison, heavy, light, metric, r4, threads, type
