Slant Six Forum :: New AC Parts on 70 dart

Quote:

I am uneasy about the compressors they push (Seltec-branded Diesel Kiki's, aka the Japanese arm of Bosch).

I have been using both Sanden and Seltec for years, in many applications, without any problems.

Actually, I would rather even use a Chinese copy/ripoff, then anybodies reman comressor. I will not even do a compressor replacement with a reman, unless a new compressor is not available. If the customer wants a reman, they can take the vehicle to a shop that doesn't care if they replace the compressor 4 or 5 times, under warrentee. Remans are total junk. Rant off.

Author:	440_Magnum [ Thu Jun 14, 2007 2:46 pm ]
Post subject:	Re: New AC Parts on 70 dart
Quote: Quote: I am uneasy about the compressors they push (Seltec-branded Diesel Kiki's, aka the Japanese arm of Bosch). I have been using both Sanden and Seltec for years, in many applications, without any problems. Actually, I would rather even use a Chinese copy/ripoff, then anybodies reman comressor. I will not even do a compressor replacement with a reman, unless a new compressor is not available. If the customer wants a reman, they can take the vehicle to a shop that doesn't care if they replace the compressor 4 or 5 times, under warrentee. Remans are total junk. Rant off. I agree on bulk remans. But if you've got a local rebuilder, its a different story provided good cores are available. I'd go without A/C before using a Chinese copy/ripoff, personally

Author:	SlantSixDan [ Thu Jun 14, 2007 5:47 pm ]
Post subject:	Re: New AC Parts on 70 dart
Quote: I am uneasy about the compressors they push (Diesel Kikis, aka the Japanese arm of Bosch, sold uner the name 'Seltec' which is just the US distributor). OK, I'm all ears: Why uneasy? I haven't ever used a Seltec, but it seems they (either under that name or the "Diesel Kiki" name) have been used as OE in all kinds of industrial/commercial/agricultural heavy-duty service, with at least as good a service record as the Sankyo/Sanden units. Seems some people prefer the Sankyo/Sanden and others prefer the Diesel Kiki, along the lines of some preferring Holley and some preferring Carter carburetors. What puts you off about the DK compressors? It can't be the country of origin, given where your new Sanden SD was made!

Author:	MoJoe [ Mon Jul 09, 2007 3:44 pm ]
Post subject:
How about horsepower loss. I've heard the the V2 takes over 20HP to run some say as high as 38 wich sounds high to me but the sanden should be down in the single digits like 8HP. That alone pluss the wieght advantage is why I want to switch. Sometimes I use my A/C as a jake brake to slow me down it sucks so much power

Author:	SlantSixDan [ Mon Jul 09, 2007 4:01 pm ]
Post subject:
Quote: How about horsepower loss. I've heard the the V2 takes over 20HP to run some say as high as 38 Uhhh...no. Not even close. No way, no how. If they took anything even remotely close to this amount of power, they'd melt down into slag under the hood from the heat released by dissipating that much energy in that small a chunk of metal. Axial-piston/swash-plate compressors (Sanden, Seltec, Frigidaire A6 and DA6, Nippondenso C171, and many others) actually tend to take a little more power to turn than crank-and-conrod compressors (Chrysler V2, Frigidaire R4, York, Tecumseh, and many others) because in a swash-plate compressor, there are more frictional junctions. The advantages of swash-plate compressors is their packaging efficiency (small overall size for any given total displacement) and their evenness of torque to run. With a V2, York, or Tecumseh, you've got peaks and valleys in the torque required to turn the compressor through a full 360Â° revolution. Peaks when the pistons are going up, valleys when they're going down. This creates noise and vibration issues that are not impossible to solve, but are much more difficult than with compressors that have a higher-but-more-stable torque to turn through a full 360Â°. Brackets and belt drive setups can be less robust because of the reduced peakiness of the torque load. But that does not properly translate to the popular myth that the V2 (etc.) type compressors have these enormous, huge power demands that are way higher than with a Sanden (etc.) type compressor. It just ain't so. (The Frigidaire R4 compressor manages to finesse-out a lot of the peakiness by using four pistons rather than two, which doubles the frequency of the peaks and valleys. It's an efficient compressor, but still has noise issues and happens not to be a very robust design...which is of course why GM installed so many of them on so many vehicles )

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