2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Random question : anybody did a Sanden to Nippondenso switch?

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Old Jun 5, 2012 | 08:56 AM
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From: Bye NYC. you SUCKED!
Lightbulb Random question : anybody did a Sanden to Nippondenso switch?

i searched and nothing like that comes up(flame suit on)

i have s5 NA and came with sanden, did some homework andit seems that the nippondenso works better than saden as a whole.

and i wonder if anybody did this switch over just for trying it out. i assume the compressor will bolt up the exact same spot as the sanden and same pulley/clutch location. just different hose, condener, etc?

the reason i ask is because there are more nippondenso systems out there and its easier to get the parts.
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Old Jun 5, 2012 | 05:29 PM
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From: And the horse he rode in on...
There is no reason why you canna do this. Just the hose end changes and the compressor change should be enough.

But...I doubt there will be any benefit. I've no experience with the Nippon, all the FC's I've had my hands on have been Sanden.

Unless your compressor is specifically broken, the limiting factor on FC A/C is condensing capacity, not compressor capacity. You can't get any more heat out of the cabin than the condenser can reject.

Effective methods to improve A/C all involve moving more heat: Correct charge with appropriate refrigerant, more efficient modern parallel flow condenser and/or improved airflow-better efan, condenser fan addition etc.
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Old Jun 5, 2012 | 06:45 PM
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From: Bye NYC. you SUCKED!
True.

this question came up in my mind cuz I took my Sanden system apart last year during my engine removal for rebuild, I just loosen the 2 hose that's connected to the compressor and removed the compressor only.

A year later (now), Engine is back and it's working (it starts and idles fine, but it have 1 water and 1 oil leak, which I'm going to fix this weekend)

but when I tried to pull vacuum on the A/C, it leaks, I tried both BNRO(whatever it's called, those green rings) o rings and new stock o rings, still leaks, so it's probably somewhere else that's leaking.

I was thinking, I'm not sure which part is leaking, but if it's not too expensive, instead of trying to find one used, might as well buy a new part and call it a day.

but as expected, the Sanden Condenser(and most of the stuff) is NLA. and I saw that most RX-7 actually came with Nippondenso (and you can get the parts for NipponDenso almost everywhere)

That's why I was wondering if anybody did this "swap" before. I tried to search but nothing came up,guess not.
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Old Jun 6, 2012 | 04:54 AM
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From: Bye NYC. you SUCKED!
oh also forgot to point out, it seems that the whole system is different, even the evap core is not the same. so i guess if i wanna do a swap gotta switch strip the old one out completely.
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Old Jun 6, 2012 | 07:10 AM
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From: And the horse he rode in on...
Everything works the same. You don't have to change anything to change compressors.

Find the leak, fix it, go on. Much less hassle than a conversion.
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Old Jun 6, 2012 | 08:23 AM
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yea, i probably gonna get a can of r134a with dye today and fix it this weekend.

don't get me wrong, I'm just wondering if it will work. not gonna bother to do it yet.
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