Quote:
Originally Posted by Clankys60
The turbo is a mix of the original exhaust housing and the rest is from a BMW 530d. I had to have the exhaust housing machined to accept the larger turbine. I'll get some more technical details when I've got a min.
So far the boost spikes at 2 bar before the ecu backs it off to 1.5 to 1.7. It drives more like a petrol engine than a diesel, it pulls all the way to the red line.
The only issue with a larger turbo is the lag. I get only 0.5 - .75 bar between 1000 and 2250 rpm. Then it goes nuts.
A remap is in order when I get the issue sorted out.
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Hi thanks for the info, if you could give me more specs that will be good,
also if you have not had it remapped that may be why you are getting a high boost spike, make shore that you have no air leaks in the pipe work from the maf/air box to the turbo as that will give a boost spike, as the rubber cold air pipe that fits to the turbo does split,
have you had anything done to the ecu before as max boost will be set to about 17psi, and also my 2002 D5 had a 2.5bar map sensor fitted from the factory, so the ecu could only see 1.5bar of boost, but I have now changed that to a 4bar sensor to stop any spikes,
do you have a cat in the down pipe, if not that maybe another thing that can give a boost spike, the TCV mapping may need fine tuning to stop this,
please let me know what map sensor you have fitted ?
Thanks Dave