Diesel terrano questions

[aero165]

hi just found the site and so i thought i would ask a couple of questions regards the diesel version of the pathfinder,i realize that most of you have dont run diesels but its a big net and somewhere someone must have a terrano.

 

1/ what are the advantages if any for disconnecting the EGR system from a turbo diesel engine. A mechanic told me once recently that getting rid of it helps it breath easier therefor improving performance and economy...Any ideas there , the mechanic that told me is an alright spanner man but an exceptional wanker.

 

2/Is there any such thing as a dash light dimmer switch on a terrano!!! i cant bloody find one, i need a torch to read the speedo its so dim.

 

3/ what sort of economy would you expect from an auto 2.7 turbo diesel?

 

thanks all any info will be gratefully recieved.

[sw]

firstly blocking off egr is a good idea on any diesel.

 

now a few facts - blocking the egr on a td27/td27t is not going to give you anymore power or torque HOWEVER is going to keep ALOT of crap and crud out of your motor. what happens is when egr enters the inlet pipe work/manifold, it will mix with the oily vapour that is in there as well and will form a black gunky, slimey mess - that builds up & coats everything & eventually makes its way into the motor & tends to act like sand paper on you valves.

 

for a very simple mod, blocking egr, its a very worthwhile thing to do in terms of making your engine last longer.

 

unfortunately my td42 patrol (same family of motor, different vehicle) was the first year to cop egr...... a little while back i pulled my inlet pipes and manifold off to inspect it all and basically from the point where exhaust gases could re-enter the system a thick film of black slimey crap coated everything..... - not good, so i cleaned it all out & changed a few things.

 

now as for what the mechanic has said about performance increase with blocking egr, there is some truth to it, but not for us with conventional waste gate'd turbo's. he is possibly referring to varrible nozzle turbos, which are a different story.

 

 

there are a few things that our family of motors respond well too, especially if already turbo'd. 1. better exhaust - cut straight to the point..... and go 2.5-2.75" straight through pipe with custom dump (turbo end that is ) made from the same size pipe. 2.timing, timing, timing. our motors are known for being very conservatively set from factory, this needs to be done on a dyno tho as every one will be different. 3. good clean filters, as with any car.

 

theres a few more things that can help but i would STRONGLY suggest egt & boost gauges from this point on & learning how to interpret what they are saying

4. manual boost controller. to up the point at where the waste gate cuts in. 5. up the fuel - again done on dyno by a diesel specialist 6.serge tank & electric pump before mechanically diesel pump. - 'diesel boy' has posted info about this mod, you would have to search for it.....

 

& theres always intercooling it, that helps on any turbo engine.

 

 

not sure on the dimmer, my pathy is 'pov pack' & doesnt have any electric features.

 

economy - well a close friend got around 10l/100km's with his td27t manual. so i would expect around 12ish with an auto in good nic.

 

 

btw: what part of the world are you in?

Edited October 10, 2007 by sw

[artrix]

firstly blocking off egr is a good idea on any diesel.

 

now a few facts - blocking the egr on a td27/td27t is not going to give you anymore power or torque HOWEVER is going to keep ALOT of crap and crud out of your motor. what happens is when egr enters the inlet pipe work/manifold, it will mix with the oily vapour that is in there as well and will form a black gunky, slimey mess - that builds up & coats everything & eventually makes its way into the motor & tends to act like sand paper on you valves.

 

for a very simple mod, blocking egr, its a very worthwhile thing to do in terms of making your engine last longer.

 

unfortunately my td42 patrol (same family of motor, different vehicle) was the first year to cop egr...... a little while back i pulled my inlet pipes and manifold off to inspect it all and basically from the point where exhaust gases could re-enter the system a thick film of black slimey crap coated everything..... - not good, so i cleaned it all out & changed a few things.

 

now as for what the mechanic has said about performance increase with blocking egr, there is some truth to it, but not for us with conventional waste gate'd turbo's. he is possibly referring to varrible nozzle turbos, which are a different story.

there are a few things that our family of motors respond well too, especially if already turbo'd. 1. better exhaust - cut straight to the point..... and go 2.5-2.75" straight through pipe with custom dump (turbo end that is ) made from the same size pipe. 2.timing, timing, timing. our motors are known for being very conservatively set from factory, this needs to be done on a dyno tho as every one will be different. 3. good clean filters, as with any car.

 

theres a few more things that can help but i would STRONGLY suggest egt & boost gauges from this point on & learning how to interpret what they are saying

4. manual boost controller. to up the point at where the waste gate cuts in. 5. up the fuel - again done on dyno by a diesel specialist 6.serge tank & electric pump before mechanically diesel pump. - 'diesel boy' has posted info about this mod, you would have to search for it.....

 

& theres always intercooling it, that helps on any turbo engine.

not sure on the dimmer, my pathy is 'pov pack' & doesnt have any electric features.

 

economy - well a close friend got around 10l/100km's with his td27t manual. so i would expect around 12ish with an auto in good nic.

btw: what part of the world are you in?

 

 

Cheers SW im in sydney at present but am soon to relocate to queensland. thanks for your input i will get to it and ditch the EGR.

thanks again/