Thread: How To: Adjust TD5 Boost Pressure.

OK,have done a few turns(8),i have just gotten it pass the 15 mark.it is going like a rocket now.will give it a few more just to get near the 17-18 mark.a total new land rover,since that tweak.

Originally Posted by coolbigrock

OK,have done a few turns(8),i have just gotten it pass the 15 mark.it is going like a rocket now.will give it a few more just to get near the 17-18 mark.a total new land rover,since that tweak.

It should be around 17 standard mate.???
Regards Robbo

ok,i have an inter-cooler of 420mm by 200mm by 67mm,i know that is the not the size the guys normally used but can i still used,for sure it is bigger then the original.

Originally Posted by coolbigrock

ok,i have an inter-cooler of 420mm by 200mm by 67mm,i know that is the not the size the guys normally used but can i still used,for sure it is bigger then the original.

If it fits I can't see why not.
Regards
Robbo

When you shorten the rod on a D2 TD5, do you have to do this in conjunction with by-passing the boost modulator or can you leave that as is ? I had shortened a fair bit a few months back, but still using the modulator and have now wound back and find the car goes better this way ? I previously increased it up to 19psi but have now back to 15. Does maintaining the use of the modulator negate the effect of shortening the rod ?

Originally Posted by surfingooner

When you shorten the rod on a D2 TD5, do you have to do this in conjunction with by-passing the boost modulator or can you leave that as is ? I had shortened a fair bit a few months back, but still using the modulator and have now wound back and find the car goes better this way ? I previously increased it up to 19psi but have now back to 15. Does maintaining the use of the modulator negate the effect of shortening the rod ?

Think I was being blonde ! Have shortened a little and goes better, but doesn't take much till hit overboost on the big hills !

The D2 EU3 wastegate modulator stops the valve to the wastegate from opening under 15PSI but from there on the valve is open and the physical wastegate diaphragm position and the flap position determines how much boost is available.
I understand from Offtrack that its operation is more complex than that but the net result is that the modulator stops wastegate "creep" at low boost levels and so increases boost at any position under about 15PSI compared with having no modulator like a Defender.
I have my screw adjustment wound up to about 9 turns and the boost transition is seamless up to 20PSI on my gauge positioned near the MAP sensor. Car is 2002 TD5 Auto EU3.
Regards Philip A

Mine is at least partially covered by the heat shield.