Thread: Boost gauge - 300tdi

Originally Posted by Disco_owner

I agree with you on that Luke , that's the beauty of these Public forums & I quite enjyed the discussion thou ,so boost pressure supply is not from outlet of Turbo it's from outlet of Intercooler supplied from the output of wastegate actuator we're talking about the same thing ,ah geez so excessive boost pressure is wastegated from intake side.
As i said in my first post in this thread. The ideal place to also take the wastegate pressure sensing line from is also the intake manifold. this ensures the engine will recieve full wastegate pressure to the manifold. Not wastegate pressure minus cooler/intake restriction.


am I right /wrong ?

okay may be you're right , that is the ideal place then .

but my Intercooler has a super dooper exotic Metals that adds extra pressure inside the intercooler 1-2 Psi,

Luke

external earth

ok got it all working i thoiught i had wired everything up last week but i was wrong so thats why the EMS wasnt working it was getting NO signal

anyway full boost is 10psi at the manifold is this about right? I am going to make up a T peace so i can fit the sender to the turbo also next week and see what the difference really is on my motor.


Mick

I have mine tee'd into the pressure line at the injector pump, at full boost i'm getting 20 PSI and i'm very happy with the power

Originally Posted by Lucus

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The boost compensation on a VE pump takes its boost pressure supply from AFTER the intercooler. This is the pressure that dictates the extra fuel. Not the pressure at the outlet of the turbo.

<snip>

Luke

the boost compensator line comes directly off the turbo outlet on a 300Tdi and any Land Rover boost pressures mentioned in publications are referenced from this spot.

Originally Posted by disco_ute

ok got it all working i thoiught i had wired everything up last week but i was wrong so thats why the EMS wasnt working it was getting NO signal

anyway full boost is 10psi at the manifold is this about right? I am going to make up a T peace so i can fit the sender to the turbo also next week and see what the difference really is on my motor.


Mick

factory boost at the turbo outlet is 1 to 1.1 bar. I doubt you'd get 5 psi pressure drop across the IC. If it is, the IC is pretty restrictive.

Originally Posted by rick130

factory boost at the turbo outlet is 1 to 1.1 bar. I doubt you'd get 5 psi pressure drop across the IC. If it is, the IC is pretty restrictive.

my thoughts exactly so i am going to move the sender and see what i am getting at the turbo

Originally Posted by rick130

the boost compensator line comes directly off the turbo outlet on a 300Tdi and any Land Rover boost pressures mentioned in publications are referenced from this spot.

Thanks Rick, That's what I thought , this is where I have tapped off my VDO Boost Gauge ?On the output of Turbo , and I doubt very stronly that there is any more that 1-2 Psi drop in Pressume accross the Plumbing and I/C if Evreything is intact and there should be nothing inside the intercooler blocking it.