Search found 95 matches

by ice-n-tropics
Wed Jan 08, 2020 2:37 pm
Forum: Automotive Air Conditioning Forum
Topic: Classic car ac help
Replies: 3
Views: 944

Re: Classic car ac help

Vintage Air's book "How to Air Condition Your Hot Rod" explains how to match system component capacities so that the compressor capacity (displacement/swept volume and drive ratio) is not excessive. condenser energy rejection must match the evaporator heat absorption plus horsepower energy...
by ice-n-tropics
Thu Nov 21, 2019 8:47 am
Forum: Automotive Air Conditioning Forum
Topic: Nissan Altima 2016 ac problem
Replies: 5
Views: 2168

Re: Nissan Altima 2016 ac problem

1) The manual control valve bleeds gas to control the crankcase pressure to change the differential pressure across the underside of the piston verses the piston top which in turn changes the swashplate cam angle or stroke and refrigerant mass flow. Early versions had internal filters which would st...
by ice-n-tropics
Mon Oct 21, 2019 4:02 pm
Forum: Off Topic Chat
Topic: Old school ac
Replies: 3
Views: 9152

Re: Old school ac

Syria could be a hot place to grow up. I designed and tested and trained retro fit installers for military a/c for Iraq at MIL spec 130 deg F ambient using Coriolis flow meters for refrigerant side capacity calculations.. Old Tech: Dad would replace the bucket of ice under the heater floor vent outl...
by ice-n-tropics
Wed Sep 11, 2019 2:33 pm
Forum: Automotive Air Conditioning Forum
Topic: Pressures Equalize Instantly
Replies: 13
Views: 2546

Re: Pressures Equalize Instantly

bohica and crazy single discharge valve on scroll can get trash under seat or rotate slightly away from discharge hole and still perform at 50%, but equalizes immediately. to see and repair valve problem : 1) Scribe/scratch line across front housing and also comp body as refrence for accurate reasse...
by ice-n-tropics
Tue Aug 27, 2019 10:19 am
Forum: Automotive Air Conditioning Forum
Topic: '86 Minnie Winnie G30 350 Sanden 510
Replies: 9
Views: 1244

Re: '86 Minnie Winnie G30 350 Sanden 510

Time will tell if you are better off having ignored advice to get a genuine SD7H15 from Tim at A/C Kits?
by ice-n-tropics
Fri Aug 09, 2019 11:37 am
Forum: Automotive Air Conditioning Forum
Topic: '86 Minnie Winnie G30 350 Sanden 510
Replies: 9
Views: 1244

Re: '86 Minnie Winnie G30 350 Sanden 510

only one belt is needed for 510 (162 cc) replacement SD7H15 (149.5) for R-134a and less vibration,
SD508 is only 138 cc.
by ice-n-tropics
Wed Jul 17, 2019 11:40 am
Forum: Automotive Air Conditioning Forum
Topic: 2006 Civic DX AC not working
Replies: 10
Views: 2187

Re: 2006 Civic DX AC not working

Dead reckoning for computer think: 1) charge is too low or high causing abnormally high discharge gas temp. Yes, scroll system low charge results in high temp discharge as charge is lost down to aprox. 12%, 2) fans not working 3) limp home mode over ride due to drive line problem or radiator temp. 4...
by ice-n-tropics
Thu Oct 25, 2018 1:35 pm
Forum: Off Topic Chat
Topic: Compressor shelf life?
Replies: 3
Views: 8484

Re: Compressor shelf life?

York shelf life is influenced by the position of the comp during storage.The box is marked to store with the shaft face down so that the face type shaft seal is immersed in oil. The compressor is shipped with a holding charge which should remain. The old spec mineral oil has much more tolerance for ...
by ice-n-tropics
Thu Oct 04, 2018 2:52 pm
Forum: Automotive Air Conditioning Forum
Topic: Can PAG and mineral coexist in old R12 system?
Replies: 3
Views: 8639

Re: Can PAG and mineral coexist in old R12 system?

g'day mate, PAG in R-12 system? GM brochure GM-0011 indicates that removal of mineral oil during retrofit (mostly paraffinic in GM's case) is not recommended. Long story short, GM/USA avoids residual flush. OEMs are not all in agreement. Mineral oil and R-134a are far apart on the polar compatible s...
by ice-n-tropics
Tue Oct 02, 2018 8:35 am
Forum: Automotive Air Conditioning Forum
Topic: SD7H15 enhanced as direct replacement?
Replies: 1
Views: 7556

Re: SD7H15 enhanced as direct replacement?

SD7H15 Enhanced provides 12% better cooling by opening suction an discharge valves wider and also reducing re expansion of gas left in cylinder at TDC before suction down stroke. My original goal was to provide better cooling for diesel sleeper cab big rigs and off road vehicles. This model is 10% n...

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