Discussion in 'Members Rides' started by faior, Sep 26, 2009.
How did you raise the boost on the DCi??
Its simple with the 112HP version, because it has GT1549-turbocharger without VNT, so I just fooled the wastegate with this kind of controller:
But if you plan to change the 100kW DCIs boost pressure, you need to take the boostvalvesensor off from the compressorpipe, before the intake manifold, and put the controller in to that hose.
You need this kind of controller for that:
And heres 2 images of the boostsensor, which I talked about earlier
The MBC(manual boost controller) goes in between the sensor and intakepipe. This is tested by me and it works lawlessly and removes boost spikes.
edit. Heres the sensor in your engine bay
IF you didnt already know
Edit2. And you can use the controller mentioned in the first picture, but its not so efficient since it bleeds the boost to the atmosphere and lies the amount of pressure to the sensor(as does the better controller too, but it doesnt waste the boost at all and its quicker).
Thanks faior I dont quite fully understand what you're saying though. So the sensor can accept a small hose onto it? and that controller will fit into the pipe?
I'll have to take the sensor off tomorrow and have a look to try and understand where it all goes.
Ah yes, good question, I forgot to explain that.
So you take the electronic-sensor off from the intake pipe and you have to drill a screw threads in to the hole and put a little adaptor there to accept the little hose. The sensor-end accepts a little hose to its head without doing anything to it. Its the same size of hose what usually comes with the boost gauges.(cant remember the correct size).
I used this kind of adaptor, its not the best, but you should figure it out what I mean
The sensor just changes the mechanical movement(pressure in this case) to electronical so the ECU can adjust the VNT-vanes with vacuum to adjust the actual boost.
When you only allow the sensor to see the boost after like 1.5bars, the vanes starts to move after that point, which then stops the boost raising anymore. Before that the vanes stays closed, because it thinks theres no boost. This causes very fast boost raising and without spikes.
edit2. heres a picture of the whole thing, how it should go. In the picture the hose goes a bit different place in the intake pipe, just to make it simple, in reality you do the screw threads in the original hole where the sensor is located.
Yeah I understand the principle I just didnt see how it would physically all attach. The diagram has helped lots thanks.
Wow, Great info there, Should even be made into a HowTo?
MOAR Boost Ed!
Old thread i know but just wondering if you tried this Ed ?
Nope. Never needed to with the FCD option.
I like how a Finn has been teaching Ed, though that was 7 years ago, as far as i know that silver Almera has changed it's owner once or twice after faior sold it, the double spoiler on the tailgate is what catched my attention originally, rather weird to see Ed praising someone's car out of the blue though.
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