VWDiesel.net The IDI, TDI, and mTDI source.
Engine Specific Info and Questions => IDI Engine => Topic started by: ThomZe on June 03, 2008, 02:51:43 pm
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Hi, I recently bought a Golf 3 GTD Special 1993. The previous owner swapped the engine from 1.9 TD to 1.9 TDI, but for some reason, they didn't swap the whole thing..
It's a engineblock \ top and so on from 1.9 TDI year 1995-6, but the fittet a AAZ pump? and stock Garrett T2.
The car is running well enough, but it's kinda .. having a powerloss?
My question is then, IS a 1.9 TDI engineblock capable of delivering more hp\nm. And can I drive with a higher amount of turboboost \ oil feeding? than if it was a ordinary 1.9td?
It's kinda awkward, sorry if the questions are stupid or bad written.. It's my first Turbo Diesel car.
Pictures of engine www.martinfaber.dk/dragon/golfmotor
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the IP can't just be swapped, it has to be adapted with parts from the tdi pump.
and yes, tdi has more potential, its more efficient than TD.
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Okay, but IF I would ever crank up the boost a bit, what would your guys recommendations be? I'm running at 0.6 bar at the moment.
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Turning up the boost won't matter until you can get more fuel, and when you do that, you want an EGT gauge. You may be able to get more power by turning up the max fuel screw some, but I don't know how much. A true mechanical TDI pump would be best. Barring that, you need larger than the AAZ's 9mm head, at least a 10mm as I believe that was the smallest available on a TDI.
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Thanks for all the info, :D A Bosch technician told me the pump was capable of feeding at the same pressure as the TDI pump? But hell, as long as it drives.
But is it true or falsh, that you can gain a little amount of power by modding your exhaustpipe that goes from the turbo and down? I've heard rumors about it, it should be "narrow" in the turbo end and create alot of friction\resistance?
And, Would I get more by adding a large frontmounted intercooler, than the stock TDI cooler?
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Thanks for all the info, :D A Bosch technician told me the pump was capable of feeding at the same pressure as the TDI pump? But hell, as long as it drives.
But is it true or falsh, that you can gain a little amount of power by modding your exhaustpipe that goes from the turbo and down? I've heard rumors about it, it should be "narrow" in the turbo end and create alot of friction\resistance?
And, Would I get more by adding a large frontmounted intercooler, than the stock TDI cooler?
You want as large an exhaust as possible with as little resistance as possible, meaning matching the turbo output, then stepping up smoothly.
An IC can help some, though it helps more when you have more fuel and boost. The AAZ pump can make the pressure as is, but not the volume.
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Well Okay, it's just a crappy engine.. 0-100 km/h in over 20 sec? It took it 7 sec to get from 60 til 80.. My old car got from 0-100 in that time :\
Sux
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no, its just a crappy build ;)
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without buying anything you could raise the power by just making the LDA mod.
but you really need TDI cam disk, plunger and delivery valves so it runs ok.
you can get a cheap tdi pump on ebay, it has everything you need
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So I just need the TDI pump? If I install an TDI pump, then I will need wireing, box and electronic speeder? Won't I?
I'm asking cus, I really don't have a clue :)
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it has to be a hybrid between the two.
parts from one and parts from the other.
not a basic modification
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That'll say, that I have to swap the internal parts of the different pumps? And then have a pump technician to configurate it?
**edit**
Is there any other options maby? Another pump than tdi? or?
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http://www.vwdiesel.net/phpBB/viewtopic.php?t=12912
that'll sure wake up your car. not exactly a direct swap, but as close as you're going to get without sending a pump to a builder (cost is about the same too, and then some with the cost of the pump)
you could sell your current pump to offset the cost a bit...
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ugh wait a sec.... TDI block & AAZ Head??? and it runs? hmmmm guess that totally blows away some peoples theories about CR, volume, etc? unless AAZ pistons were used...
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look closer, its a tdi block AND head
(http://www.martinfaber.dk/dragon/golfmotor/P1010272.JPG)
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look closer, its a tdi block AND head
(http://www.martinfaber.dk/dragon/golfmotor/P1010272.JPG)
aha... didn't check the photo's.. maybe he should change his sig :wink:
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I'm sorry if I said something wrong, only know what the former owner told me.. ?
But that will say, it's a complete TDI "Mechanical" not ECU controlled engine? Then it's just badly configurated since it runs so bad?
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I believe so, in my country we also see a few cases of adventurous guys that just bolt things together and hope they work as a whole.
but TDI is a different technology, and without taking you IP apart (or asking the previous owner) we can only guess what is inside.
if he did a good job, the lack of performance could come from something different.
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Okay, well to bad, I'm to inexperienced to do anything to it, better try to sell it again, but thanks :)
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By the way, could the performance issue be, because of the pump timing? By searching the net a little I found out others with m-tdi pumps had powerloss due to bad pump timing, it should be more advanced? more aggressive?
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By the way, could the performance issue be, because of the pump timing? By searching the net a little I found out others with m-tdi pumps had powerloss due to bad pump timing, it should be more advanced? more aggressive?
Your timing needs to be right, with the right pump. You have the wrong pump on your engine. "Aggressive" has nothing to do with it.
Read the link that jtanquay provided. It talks about the pump you need:
http://www.vwdiesel.net/phpBB/viewtopic.php?t=12912
Then go to the proper page on this forum and identify your engine as an MTDi:
http://vwdiesel.net/phpBB/viewforum.php?f=5
And ask for the proper timing spec for an MTDi.
There also may be some one that has a spec for running your engine with the wrong pump (the one you have) and achieving acceptable results.
Also, as Jimfoo pointed out, you need a bigger exhaust system, from the turbo, all the way to the point that it exits the car. 2.5 inch / 64mm would be a minimum. Muffler is optional.
MTDi engines have been done many times befor. The is pleanty of information available on how to do this right.
If this is beyond your capabilty, motivation, or means, sell the car and disclose that it has the wrong pump, and give the new owner the information to make it right.