adjusting boost on nissan patrol 3.0 turbo

The boost is adjusted by a variable vaine which is controlled by the ECU. You would be better off buying DTronic.

Leroy

is the Dtronic like an aftermarket ECU or piggy back?
What is the boost able to be adjusted upto safely? and how much of a power increase does this make to the good old patrol?

Thanks

Why do you want to adjust the boost? I assme it is to get it to come on earlier...

I have a Prado 3.0 fitted with a Dtronic and the next step is a Boost Control Valve that allows the turbo to come on earlier to improve the bottom end torque and reduce turbo lag. These are fitted at most places that specialise in turbo diesel applications.

If you want to reduce the boost I'd be wondering why?

Wizard
Prado TD
Gold Coast

I want to increase the boost, I am wondering what boost they run standard and how much boost they can handle safely?

I know that this will give less lag etc, but surely it gives an overall higher power output aswell.

Has anyone had one on the dyno after performing this modification?

As others have said it is a variable vane turbo controlled by the ECU, I guess the only way to modify that would be Dtronic or a complete replacement ECU but I doubt Wolf makes one for a diesel.

Its a tad different to hotting up your Rex, look see...no blow off valves here!
Most diesels on the market at the moment are tuned very close to their limit and its only the older wastegate controlled TDs that respone to SLIGHT increase in boost but you also need to increase fueling, exhaust, cool intake charge, etc to gain any advantage. But the limiting factor in a diesel is usually the time available for the flame front travel to burn efficiently the fuel and air charge availble. Just dumping in more air and more fuel is a definate loss of power and destructive to engine components (overheating, burning valves, increase in emissions.)

If you search the posts for the overheating troubles with all Patrols ATM, 4.2 and 3.0 you will see that there isnt much room for improvement without opening pandoras box to a never ending search for reliability!

But look at the bright side, there are a never ending line of rice burners out htere just begging for someone to screw the boost up, fit a 8 inch exhaust, plenty of mesh in the grill, remove the suspension so it rides like a go-kart and wrap a bit of licorice around the 20inch imported rims to satisfy your hunger to change what millions of reseach and development dollars went into to create!!

;) Matt.

Thanks

Thats the info I was after, 17psi is a fair bit of boost to be running.

My GU 2.8TDI has a Motson chip and a boost compensator.
The chip changes fueling and allows eairlier boost to standard, the boost compensator gives a higher max boost -- I have set mine at 15psi by adjusting the bleed valve which just delays operation of wastegate.
Some time ago a perished hose prevented operation of wastegate so boost was not controlled and went to 20psi (discovered this after fitting boost gauge) The wastegate was also seized but freed up eaisly -- to check wastegate is operational move lever with spanner (if you do not have a gauge)
Do not think above mods will shorten engine life as max boost is rarely used unless you try and drive it like a sports car.
Bob