Search found 29 matches

by swampy 6x6
Sat Oct 22, 2022 5:56 am
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: Idle up /stand alone thermistor ,universal applications
Replies: 1
Views: 267

Idle up /stand alone thermistor ,universal applications

hi Finally found a system that is universal enough to work on almost any carburettor car . VS the Rochester unit which only functioned once u flicked the accel pedal which of course your engine might stall if equipped with performance cam .GM repackaged it as it was an idle stop solenoid originally....
by swampy 6x6
Sun Sep 04, 2022 3:27 am
Forum: Automotive Air Conditioning Forum
Topic: Poor cooling - diagnosing weak compressor or a TXV
Replies: 14
Views: 3802

Re: Poor cooling - diagnosing weak compressor or a TXV

hi Clean the evap ,and change the TXV while its all out . Cleaned the fleet vehicles every 60--80k miles . Most were at least partly covered in debris . Excessive long term dirty evap cores are far more likely to leak . Caused by excess moisture and any acid based chemicals on the air born debris .
by swampy 6x6
Fri Jul 08, 2022 1:13 am
Forum: Automotive Air Conditioning Forum
Topic: What happens when capacity of system is exceeded?
Replies: 76
Views: 25183

Re: What happens when capacity of system is exceeded?

hi low side freezing point temp is around the 28-30psi On your gauges commonly seen 20--40psi but usually 25---35 psi . Yes there are exceptions High side R12 was common at 130--150psi in refrigeration convert this to temperature R12 at 130psi == R134a at 150psi SUPPLYING THE EVAP WITH COLD COLD 100...
by swampy 6x6
Wed Jul 06, 2022 9:38 am
Forum: Automotive Air Conditioning Forum
Topic: Whatever happened to that ultra-cold Ford truck?
Replies: 9
Views: 4490

Re: Whatever happened to that ultra-cold Ford truck?

hi A good working auto air can achieve low vent temps in hot weather . My 2007 diesel Ford Ranger I finally fixed properly in approx 2015 . Done at approx 65,000miles new evap core new txv new desiccant bag added 2nd condenser with e fan Performance in the record setting hottest day 46 deg cel 114f ...
by swampy 6x6
Sun Jul 03, 2022 12:14 am
Forum: Automotive Air Conditioning Forum
Topic: K5 r134 conversion, where to go from here? Help?
Replies: 26
Views: 3387

Re: K5 r134 conversion, where to go from here? Help?

hi
Sanden 7H15 common conversion compressor is 154.9cc = 9.45 cuin ,,,,, oil capacity 130--200ml pending model

Sanden SD508 compressor size 138cc = 8.4 cuin

Delco R4 comp size 164cc=10 cuin . oil cap 170cc
by swampy 6x6
Fri Jun 24, 2022 12:09 am
Forum: Automotive Air Conditioning Forum
Topic: Brand new A/C from scratch - '88 Mustang
Replies: 29
Views: 14924

Re: Brand new A/C from scratch - '88 Mustang

hi many custom systems out there in operation R134a sight glass running full How u ask because the condenser is either very large or the vehicle / machine uses 2x condenser cores high pressures common 150--200 psi in 90 --115f ambient weather and high humidity Compressor oil R12 and R134a for ----- ...
by swampy 6x6
Thu Jun 16, 2022 6:08 pm
Forum: Automotive Air Conditioning Procedures, Tips and FAQ.
Topic: Specific procedures for charging/evaluation - How? Where? What?
Replies: 3
Views: 12949

Re: Specific procedures for charging/evaluation - How? Where? What?

hi 1/ charge/repair in shade ,but remember vehicle will operate in full sun 2/ a good air con should be able to operate with at least 1xdoor open if not all !!! 3/ yes always test a/con on recirculate 4/ & 5/ both blowers on medium speed 6 / pressures and temperature performance need checking at...
by swampy 6x6
Wed Jun 15, 2022 5:26 pm
Forum: Automotive Air Conditioning Forum
Topic: Pressures.
Replies: 17
Views: 2998

Re: Pressures.

hi Not trying to force this onto people but like my trade school taught me ,learn the theory /actual correct spec of a good example and everything else is easy . And yes working in automotive is always a compromise . MY passion for auto a/con was started along time ago , I then did repair work in th...
by swampy 6x6
Tue Jun 14, 2022 9:40 pm
Forum: Automotive Air Conditioning Forum
Topic: Pressures.
Replies: 17
Views: 2998

Re: Pressures.

hi What people forget , any really experienced refrigeration mechanic absolutely HATE automotive . WHY because the systems are a complete compromise and 80% of them are built to a price .-- ---So what is wrong the condenser side ,,, is way way small has more to do with low hood lines and total cost ...
by swampy 6x6
Mon Jun 13, 2022 3:46 pm
Forum: Automotive Air Conditioning Forum
Topic: What is VA thinking? For the experts
Replies: 7
Views: 1690

Re: What is VA thinking? For the experts

hi A 1 ton txv seems a little on the low side . Although the Tx is suppose to be matched to the size of evap . I would try a 1.5 ton valve. Aftermarket suppliers can have several different sizes of evap cores . Hoping u have not installed a unit thats to small . Lowering the high side pressure to be...