300TDi Pump Tweak

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Tom79

Member
Posts
62
Hi all I have been looking and looking and cannot find out how to adjust the pump. I did Google it and found a few threads on various forums but they all seemed a bit complicated. I am sure I have seen it in the haynes manual but its not there today! Also is it safe to do? Just thinking of the head gasket and some people say that the header tank can split. So many people say different things it gets confusing in the end. I thought it was a simple job but maybe not!
 
If you're upping the fuel are you going to up the boost too? Is there much point if you don't? Are you going to crack a piston head? :)
 
All I want to do is be able to pull away a bit quicker it really lags for a couple of seconds
 
TheVengefulElephant said:
If you're upping the fuel are you going to up the boost too? Is there much point if you don't? Are you going to crack a piston head? :)
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All such modifications are cowboy without the benifit of a rolling road and something to measure the outputs, once you have fooked about with it you can never get it back to standard again.

Over the years I have seen people try to modify engines, exhaust systems and fuel systems on a budget with undesirable results.

The most recent being a scania dealer who tried to increase the output of one of our vehicles by fooking about with the pump, which as you should know can be used for a range of outputs but screwed the engine up eventually when they blew the final turbo up and it went into the engine. They even said at one point they would not give a warranty on the turbo's 3 of the fokers aswel eventhough they caused the failures. I thought at one point somebody must have left a socket or sumut in the intake because the turbo was destroyed with the shaft bent, but it was because the poor bastid was spinning so fast it self destructed. There was more oil in the exhaust at one time than in the engine.
 
That would be the best idea but probably expensive! I didn't realise it was as complicated as that
 
De-cat front exhaust, egr removal, clean intercooler and slightly larger bore air pipes and mine flies now ... relatively ... ;)
 
my pumps been tweaked for ages and had no problems at all. mines done 130,000 and the difference is instantly noticable!all you have to rememember is not to get greedy.whatever people recomend might work ok for them but just adjust it in stages until you are happy. mine took about half hour to do but is nowhere adjusted as much as recomended.all you need to remember is to adjust it so it doesnt smoke.if you go too far it will smoke and probably self destruct but a little tweak should be quite safe!
 
Paul D said:
De-cat front exhaust, egr removal, clean intercooler and slightly larger bore air pipes and mine flies now ... relatively ... ;)
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Thanks this is probably the easiest way! I have already blanked the EGR and cleaned the intercooler and done all filters etc. so will get a decat pipe off ebay they're only about £20.

I cant see there being a problem with the MOT on the last one the emissions were well below the limit
 
I was thinking about doing this, spoke to mark at MID engineering in wantage he runs a specialist land rover garage. and he said that he could turn the pump up less then quarter of a turn for me, he said that the diffrence would be noticeable. but warned me off from changing the boost, unless i wanted to be changing head gaskets!!
he did say that an intercooler would be the best way forward with a pump tweak after that.
jimbo.
 
jimbodisco said:
I was thinking about doing this, spoke to mark at MID engineering in wantage he runs a specialist land rover garage. and he said that he could turn the pump up less then quarter of a turn for me, he said that the diffrence would be noticeable. but warned me off from changing the boost, unless i wanted to be changing head gaskets!!
he did say that an intercooler would be the best way forward with a pump tweak after that.
jimbo.
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I didn't think that the intercooler had much of a restriction, however if you want to go in that direction, take the pipe off and run it without it and test the theory, but don't let the noise convince you its going faster take a stop watch.

I blanked my egr and fitted a pipercross filter, only because I got it for fokal, and tossed my air box. Can't say I noticed any difference tho, and you have to be carefull here you can spend a load of doshers for limited if any worthwhile gains. might just be better spending time making sure the bits you do have are working properly, and if you want a flyer get a v8.
 
david451 said:
I didn't think that the intercooler had much of a restriction, however if you want to go in that direction, take the pipe off and run it without it and test the theory, but don't let the noise convince you its going faster take a stop watch.
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The theory with intercoolers is to fit one that has a greater cooling capacity than the standard one. As air cools it contracts, so you can get more of it in a given space, if you have more air, you have more oxygen and can burn more fuel, giving you more power.

I don't which pipe you mean when you say "take the pipe off", but if it is any of the pipes between the turbo and the manifold you will find you have much less power and more smoke.
 
Richard Martin said:
The theory with intercoolers is to fit one that has a greater cooling capacity than the standard one. As air cools it contracts, so you can get more of it in a given space, if you have more air, you have more oxygen and can burn more fuel, giving you more power.

I don't which pipe you mean when you say "take the pipe off", but if it is any of the pipes between the turbo and the manifold you will find you have much less power and more smoke.
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exactly right! ;)
 
mark1971 said:
exactly right! ;)
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Hehehehe, with no turbo boost.

You forget sometimes you're not talking to a mechanic., we used to get water down the stacks of some of our vehicles going through our big car wash, it would gather in the intercooler and freeze in the winter, to get the vehicles back we would connect the hoses together bypassing the cooler. If he does that then he will see that for the money spent on a new cooler that the benifits without the cooler aint that great, on a vehicle that is working hard like a truck perhaps. Perhaps if he is going the competition route he might tho, but I would toss the oil burner and fit a v8.
 
david451 said:
Hehehehe, with no turbo boost.

You forget sometimes you're not talking to a mechanic., we used to get water down the stacks of some of our vehicles going through our big car wash, it would gather in the intercooler and freeze in the winter, to get the vehicles back we would connect the hoses together bypassing the cooler. If he does that then he will see that for the money spent on a new cooler that the benifits without the cooler aint that great, on a vehicle that is working hard like a truck perhaps. Perhaps if he is going the competition route he might tho, but I would toss the oil burner and fit a v8.
Click to expand...


hehehehe..
been there done that! HAD 6 V8'S and been down the lpg road..now i have 2 modified diesels,1 disco and 1 RR, both pull strong now and less fuel ;)
 
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