elbekko Posted January 25, 2012 Share Posted January 25, 2012 All the write-ups seem to talk about using a York or Sanden compressor for on-board air. Now, from what I can find, my 300TDi came with a Denso compressor, which I can't really find much about. Microcat tells me my RRC 300TDi uses a BTR4717. I think this is the one: http://compressor-express.co.uk/ac-compressor/land-rover/Land-Rover-07-10PA17C-PV4 Can this be used for on-board air? I'd love to have it, but if it can't be done, I think I'll just reconnect the aircon and have it refilled. I thought I'd be able to find a datasheet on the Denso site, but entering the part number there gives me right around F all result. Quote Link to comment Share on other sites More sharing options...
mickeyw Posted January 25, 2012 Share Posted January 25, 2012 I'm using a Denso compressor on my serpentine V8, which AFAIK is the same as you have. So far (at least 3 years) it has been fine pumping a receiver upto 100 PSI with no signs of complaint. Usage is occassional tyre pumping, a blow line when out and about, oh and my air horns When I first connected it I gave it a squirt of oil inside, but nothing since. Quote Link to comment Share on other sites More sharing options...
elbekko Posted January 26, 2012 Author Share Posted January 26, 2012 Well, I took a look at it earlier, and there may be some flaws in my plan. As the belt has been off for over a year (couldn't find a pulley when putting it back together and just said sod it), all the pulleys now make a horrendous noise, especially the aircon one, so I decided to not fit the belt after all or I'd probably go insane after about 5 minutes of driving it. Quote Link to comment Share on other sites More sharing options...
stuck Posted January 27, 2012 Share Posted January 27, 2012 I'm using a Denso compressor on my serpentine V8, which AFAIK is the same as you have. So far (at least 3 years) it has been fine pumping a receiver upto 100 PSI with no signs of complaint. Usage is occassional tyre pumping, a blow line when out and about, oh and my air horns When I first connected it I gave it a squirt of oil inside, but nothing since. Mickey, Any chance of a picture of your set up please? (just under the bonnet) Cheers, Mick. Quote Link to comment Share on other sites More sharing options...
mickeyw Posted January 27, 2012 Share Posted January 27, 2012 With pleasure... The top manifold is home made for easy connection. Tappings are 1/4"BSP and pipe is 10mm O.D. Quote Link to comment Share on other sites More sharing options...
stuck Posted January 27, 2012 Share Posted January 27, 2012 Cheers Mickey, Sorry to be a pain but is there any chance of a wider angle pic? Compressor appears to be mounted on the alternator bracket but I can't tell for sure. (My lump doesn't have a compressor so I don't know how they are mounted) Quote Link to comment Share on other sites More sharing options...
mickeyw Posted January 27, 2012 Share Posted January 27, 2012 That's the standard position for the compressor on serpentine V8s. This one was from a 1995 Disco, but I'd imagine it was the same in the Range Rovers of that year. Hopefully this makes it a little clearer. Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted January 27, 2012 Share Posted January 27, 2012 Range Rover P38 had the compressor the other side! (Passenger) Quote Link to comment Share on other sites More sharing options...
stuck Posted January 27, 2012 Share Posted January 27, 2012 Ah, Cheers Bowie. Anybody got a picture they are willing to post please? Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted January 27, 2012 Share Posted January 27, 2012 That's the standard position for the compressor on serpentine V8s. This one was from a 1995 Disco, but I'd imagine it was the same in the Range Rovers of that year. Hopefully this makes it a little clearer. What air horns have you got fitted in the top of that pic of your compressor? Quote Link to comment Share on other sites More sharing options...
mickeyw Posted January 27, 2012 Share Posted January 27, 2012 (edited) Ah I picked those gems up at Newbury a few years back. They're dual tone 12" and 14" long approx. The chap I got them from used to have them fitted to his 8-wheeler. I can't remember the make, but IIRC they're American and FFF loud - I stuck the garage airline in them when I got home just to try them out. My ears were ringing for a few minutes afterwards They also made the MOT man jump a wee bit These were my initial reason for an on-board air system. I don't think any diddy electric air horn compressor would have done them justice. For your pleasure... Oh and the reason for the horns??? It seems even Landrovers aren't quite big enough for muppets to see before they pull out in front of me, or decide to cut me up on a motorway. A quick blast of these soon wakes them up as they expect to find a 40 footer bearing down on them. Edited January 27, 2012 by mickeyw Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted January 27, 2012 Share Posted January 27, 2012 I shall have to keep my eyes peeled for a set of them, the standard horn is a little on the pathetic side! Once I find a set I'll need to work out if I can squeeze an aircon compressor in next to the ZF74..... Did the MOT man have to go and change his underwear? Quote Link to comment Share on other sites More sharing options...
mickeyw Posted January 27, 2012 Share Posted January 27, 2012 Did the MOT man have to go and change his underwear? Didn't you see the dent on the inside of my bonnet? Quote Link to comment Share on other sites More sharing options...
mickeyw Posted January 27, 2012 Share Posted January 27, 2012 So anyway, getting back to the Elbekko's question, yes the Denso seems to work OK. I can't compare with the Sanden type as I haven't been in a position to try one. If your pump is seized don't despair, so was mine. It got a gob full of muddy water before I had the hoses connected, and then sat unused for a while. A good drink of WD40 and some working it back and forward soon had it freed off. BTW: my air intake pipe sits behind the brake pedal box, so relativley sheltered from engine bat water. I have a small K&N on the end to keep out the worst of the dirt. Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted January 27, 2012 Share Posted January 27, 2012 Random idea, would connecting the inlet to the compressor to the inlet manifold on the 300 tdi be a bad idea? I can see the positives, i.e no need for an extra filter and bound to be some oil in the air from the turbo (they all leak a little don't they?). But would it affect performance? I assume it would as it would be akin to an air leak, or would the turbo make up for it as the wastegate would open later? Probably a stupid idea Quote Link to comment Share on other sites More sharing options...
mickeyw Posted January 27, 2012 Share Posted January 27, 2012 I'm not sure I'd want engine oil with it's inherent contaminants getting into the compressor. Maybe equal or worse than no oil Quote Link to comment Share on other sites More sharing options...
landroversforever Posted January 27, 2012 Share Posted January 27, 2012 That would mean needing to use an oil trap before the tank. Dont want oil going into the tyres! Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted January 27, 2012 Share Posted January 27, 2012 ..... Probably a stupid idea I'm not sure I'd want engine oil with it's inherent contaminants getting into the compressor. Maybe equal or worse than no oil Good point Mickey, confirmed as a stupid idea then 1 Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted January 27, 2012 Share Posted January 27, 2012 That would mean needing to use an oil trap before the tank. Dont want oil going into the tyres! With a number of the compressor setups you need that anyway, some people drip feed oil into the compressor. Quote Link to comment Share on other sites More sharing options...
C18RCH Posted April 18, 2012 Share Posted April 18, 2012 I'm thinking about modifying an old winch to run either a compressor or air con pump to supply air for pumping tyres up etc. My question is what stops them from building up dangerous pressures? Do they have pressure release valves like domestic compressors or a clutch to stop drive when max pressure is reached etc? Cheers, Rich Quote Link to comment Share on other sites More sharing options...
landroversforever Posted April 18, 2012 Share Posted April 18, 2012 They have a pressure switch that senses a lower pressure than a set parameter and turns the compressor on. I would have thought they also have a pressure relieve valve for an over-pressure situation. Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted April 18, 2012 Share Posted April 18, 2012 A pressure switch does the turning on and off of the pump to keep the amount of pressure you want in the tank,in the case of a/c compressors the switch is activating the electronic clutch. To stop things exploding should the swich fail you need a pressure relief valve that will go off and release pressure if it gets too high. Both parts can be the exact same ones as used on 'normal' compressors Quote Link to comment Share on other sites More sharing options...
mickeyw Posted April 19, 2012 Share Posted April 19, 2012 Pressure switch, PRV etc would normally be built into a 'system'. The compressor alone does not feature these. My compressor switches off at about 110PSI and back on again at about 80. The hysteresis will vary and may be adjustable depending on the type of switch you use. My PRV is also adjustable and is set to blow at about 120PSI. All items you will need can be found on the bay As CW says, mains powered compressor parts are perfectly suitable. Quote Link to comment Share on other sites More sharing options...
Michele Posted April 19, 2012 Share Posted April 19, 2012 Both parts can be the exact same ones as used on 'normal' compressors You can also buy the whole as "spare" and bolt on/plumb in to make your own setup. Quote Link to comment Share on other sites More sharing options...
C18RCH Posted April 19, 2012 Share Posted April 19, 2012 Thanks for the replies. I assumed they would have some sort of safety device but wanted to know before I start gathering the parts. If you were using an aircon pump which would you reccomend/have you already used? Will any do or do some work at too low a pressure to be of use? Rich Quote Link to comment Share on other sites More sharing options...
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