View Full Version : Would this really work?
"Trick the intake manifold air pressure sensor, located on top of the IC.
It reads 1.87V at vacum to 0 psi and then rises about 0.13V per
psi. The ECU starts to restrict the boost at 3V.Just soft limit the
sensor's signal and you can get more boost.
Don't hard limit the sensor's output else you will get too
much boost."
So if this would work, the only thing that should be done is
to lower the voltage of the sensor.. setting it to something like
1V and that would give 1.1Bar...:confused:
in theory yes i suppose mmmmm maybe a resistor inline???
bit of a minefield though ?
then again in theory the sound barrier couldnt be broken on land :rolleyes: but we did it :p
HIGHLY reccomend a boost gauge though JUST IN CASE (not because we sell em :D )
Hmm, sounds interesting...
As I can see there are three lines to the connector. I guess that one pin is power, one ground and the last one the signal :D
Does anyone have an electrical schematic of the Cupra? :confused:
ill see wot i can find out for ya , rather you than me though
http://www.data-techniques.net/cwm/contrib/ruinkai/peepwallA.gifhttp://www.algy.com/anxiety/disc/smilies/bombani.gif
I think that voltage from the sensor is for the 156/150hp motor.
but i guess its just to hookup a multimeter and measure the
voltage at 0 boost... and then measure at every psi increase..
i guess the boost diff. would be much more noticable on a
150hp motor than on our 180hp..
but who knows, maybe 190-200hp just by manipulating with
that sensor...
mail me as i have a little bit of info that'll help you tell what is what , s for wot it does and how , up 2 u , like i said above , rather you than me
GOOD LUCK
ps let me know when you have tested it , if you do
DAZ
But wont the ECU register the overboost and cut out the turbo?, unless you reduce that signal with resistors as well, i might have a fiddle with that too!!,
Flapper, can you also email me the info that you have found out please, how much are your boost gauges too?,as i will need one of these if i am going to play around with it!, my email address is ian@mosser.co.uk
Lots for me to do now then as i want to build a vag1551 interface, fit cruise control, fit a boost gauge and fiddle around with resistors on the sensor lines!, I'm sure it can be done as all the resistors will do is to keep the original throttle mapping, but increase it across the rev band!!, Might be worth fitting potentiometers so that it can be adjusted in the car temporarily
since this is the pressure sensor were messing with.. wont the ecu expect 0.8 Bar (or whatever max pressure is on a leon) at 3V ? and if were tricking the sensor.. it would cause the turbo to load ie 1.1Bar... and wouldnt the mixture be to lean?
cause the ecu thinks that the max still is 0.8Bar?
Or am i totally wrong?
but maybe it doesnt matter, cause what ive heard is that
the ecu on a 1.8T engine uses a fat mixture at high boost levels
on purpose.. as a security thing.