The plan is to use all the interior parts and pretty much update the rest apart from the OE radiator/condenser fans which are fundamentally very effective. Only downside to the original rad/condenser fans are theyāre ābrushedā and possibly a bit amp hungry which possibly could need updating if I decide to go electric scroll compressor.
Done away with heater tap and cable and replaced with a more modern linea pot and motorised heater tap!
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New receiver/dryer courtesy of JLR as itās identical to original and has a port to fit modern Trinary switch for High/low & condenser fan triggers. In my case updated the system so that the rad & condenser fans are activated on a āresistive circuitā on the A/C system being energised and the trinary switch controls the āHigh Speedā circuit (non resistive) when/if required.
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All barrier hoses to be replaced with R134a specific hose. As all ānon-R12ā refrigerants are a smaller molecule than the R12 refrigerant you must change the barrier hose otherwise youāll need to regas on a regular basis due to gas loss.
Same with all the original pressure sensors must be replaced as the temp/pressures are different between R12/R134a rendering them useless.
Anyhow Iāll update my progress on the following topic,
There are threads covering air conditioning retrofit but this is for a RHD vehicle ROW in my case for Australia on an ā88 Bertone. Rather than covering similar already covered info on LHD retrofits if anyone has any specific questions on a RHD conversion (remember ROW RHD models never had...
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The purpose of this thread, after establishing that the original Sanden 508 was a 138cc capacity is to choose a more modern/efficient compressor using the base line of 138cc being what originally was considered to be necessary discharge capacity to cool the X1/9ās interior.
Unfortunately this may only be relevant to engine crank driven compressors only and not to something like an electric compressor which runs at a constant 4500rpm as in the Rencool 12v compressor Iām looking at. With a specification of only 18cc per revolution it is far smaller than the Sanden crank driven compressor at 138cc per revolution.
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The difficulty part here is comparing as the crank driven compressors are operating over a varying range of rpm and as such has some level of āinefficiencyā built in to prevent damage at high rpm, whereas the electric compressor (scroll) does not!
Open to discussion as Iām still scratching my head and trying to, if possible find some way of comparing a constant driven v variable driven compressors
!
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