Hi all, hoping to get a little advice on the above..

Im currently driving a 1.4 t-jet 150. Thinking of installing an electronic boost controller to increase/hold more boost throughout the rev range (something like the HKS evc 5).

Question is, is it posible? Is the OEM wastegate operated by the ECU or solely on mechanical/diaphragm? Does anyone on here have any EBC running on their ride at the moment? Hoping to hit ~1.2-1.5bar, as from my knowledge the stock actuator goes to about 0.8bar? (read on forums)

Hope some gurus can chime in!

Thanks in advance!

Mark

ok, a lil edit.. does anyone know at how many bars the ECU puts the engine into limp mode? (if it does at all)

noone got any info on the above?

Waste gate is controlled by ECU by a n75 type valve.

The thing is that if you try to run much more pressure than the ecu has on it's maps it will 1. open the re-circulation valve/ blow off, 2. put the car in limp mode.
So it isn't just one pressure over which it goes to limp mode... it should be a different pressure for all rpm/load combinations.

This being an electronically controlled unit.. you will have to struggle a lot with the electronic boost controller to get it to a similar setup as the standard.. only just slightly higher...but not high enough that the ecu thinks the stock valve is not doing it's job.
but it is possible with some.

A manual boost controller will not work.

You could add a spring to the waste gate, i think FORGE sell the helper spring, or the complete waste gate actuator ( search for the Punto Abarth one).


Anyway best band for the money will be to just get an ECU tune.

Hi Auric,

Thanks so much for the info, appreciate the reply. The car is supposedly mapped already, thus want to try and see if i can push the boost a little.

So what you're saying is, change the actuator then install the boost controller yea?

Or just changing the actuator will be enough?

slickkon said:

Hi Auric,

Thanks so much for the info, appreciate the reply. The car is supposedly mapped already, thus want to try and see if i can push the boost a little.

So what you're saying is, change the actuator then install the boost controller yea?

Or just changing the actuator will be enough?

Click to expand...

Hi,
If the car is mapped already how do you expect anyone on here to know what the maximum boost pressure is? The correct approach is to fit an actuator that will give higher boost (assuming the turbo has enough reserve capacity) and then get the ECU re-mapped to that setup.


Robert G8RPI.

g8rpi said:

Hi,
If the car is mapped already how do you expect anyone on here to know what the maximum boost pressure is? The correct approach is to fit an actuator that will give higher boost (assuming the turbo has enough reserve capacity) and then get the ECU re-mapped to that setup.


Robert G8RPI.

Click to expand...

Thanks! I should have mentioned, it was supposedly mapped by factory, country specific Veloce model. Was more interested to know if the wastegate was operated soley by mechanical wastegate or ECU combined.

Wouldnt the Boost controller regulate the pressure that the wastegate 'sees'? would i need to change the actuator in that case?

The electronic boost controller regulates the boost that the actuator sees.
But at the same time the waste gate can be opened by exhaust pressure. That is the reason for increasing the strength of the actuator spring.

You don't need an electronic boost controller. the car already has one, it just needs to be remapped. But you might need a helper spring, or a new actuator.

Hey Aurick,

Thanks for your reply.. ok, i think i finally have an understanding on how it works now.

aurick86 said:

The electronic boost controller regulates the boost that the actuator sees.
But at the same time the waste gate can be opened by exhaust pressure. That is the reason for increasing the strength of the actuator spring.

You don't need an electronic boost controller. the car already has one, it just needs to be remapped. But you might need a helper spring, or a new actuator.

Click to expand...

Hey Aurick,

Sorry one last question. So if lets say we follow the diragram below:



Does it mean it removes/deletes the factory N75 valve? If so, can we do this? Since the EBC already monitors and controls boost pressure.

Sorry for my ignorance, very new to the whole forced induction system..

I am trying to say that there already is a electronic boost controller on the bravo. the N75 is part of it.
The real problem you have is that the you want more boost, that might be impossible because at some point the pressure in the exhaust will start forcing open the waste gate.
Watch this video a few times:

bloody awesome.. how did i not find this while scouring youtube.. thank you ever so much Aurick!