R4 Scroll Compressor Experience

[studigggs]

High pressure shut off 1st, then you just ground the OE wire to the T-Stat and it'll work just fine.

The fresh door will move to recirc in Hi/Med, full cold, dash vents selected if I ground the OE pigtail, I was saying I really like the 'auto' fresh/recirc function, but you're right, its prob worth giving up a gimmicky feature. to avoid another compressor warranty replacement.

 

[cookseyb]

I have gone to the Sanden 508 series compressors on all my stuff and they work great in this Texas heat...

 

[L31MaxExpress]

I have gone to the Sanden 508 series compressors on all my stuff and they work great in this Texas heat...

Sanden also makes either a 508 or a 510 with a R4 rear head. Many companies offer conversion brackets to bolt the directly to R4 brackets.

 

[name]

Is there a thread that shows the Sanden conversion with a video or picture thread ?

 

[SuperSpore]

Sanden also makes either a 508 or a 510 with a R4 rear head. Many companies offer conversion brackets to bolt the directly to R4 brackets.

I would be interested in trying this out. If I'm able to use adapters, etc. so I can use the existing R4 bracket... I'd definitely get a sanden to resolve this.

 

[yevgenievich]

I did sanden conversion on my 91 square using stock lines. Had an adapter to extend one of them.

R4 to Sanden whith stock ac lines(for serpantine)

Went ahead with a sanden change out on my suburban. Kept original lines by picking up a sanden unit with rear line mount and adding inline #8 discharge adapter. I will get part numbers and drawing for adapter plates posted on monday. The pulley on the compressor has extra ribs, but it does not...

www.gmsquarebody.com

 

[L31MaxExpress]

I would be interested in trying this out. If I'm able to use adapters, etc. so I can use the existing R4 bracket... I'd definitely get a sanden to resolve this.

I have since figured out the SD7H15 only works well on a single evaporator sytem, forget trying to use one on a dual system, just FYI.

 

[yevgenievich]

SD7H15HD-FLX worked well on dual system on 91 suburban for me. Parallel flow condenser and elec fan were also added. Held cabin cool in 100+ degree heat idling for over an hour. Was stuck at copart lot mid summer in Houston waiting for a vehicle and had 3 people with me.
Edit: Also had the heater valve added to kill heater flow

 

[yevgenievich]

Sanden service guide

sanden service guide

Wanted to throw this upload of the Sanden service guide as it is similar to dealing with general AC work and has good pointers for evac/flush/oil fill/compressor replacement.

www.gmsquarebody.com

 

[L31MaxExpress]

SD7H15HD-FLX worked well on dual system on 91 suburban for me. Parallel flow condenser and elec fan were also added. Held cabin cool in 100+ degree heat idling for over an hour. Was stuck at copart lot mid summer in Houston waiting for a vehicle and had 3 people with me.
Edit: Also had the heater valve added to kill heater flow

Wildblue19 and I both had cooling issues with the Sanden and dual a/c here in Texas summer heat.