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TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old March 17th, 2008, 17:40   #1
Satiro
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Default MAP sensor MOD...

I'm very interested in make this mod and i believe that a lot of members of this forum too...who know!
I don't understand at all the information of other threads...

Material needed:
-3.3V Zener diode
-1K Potenciometer
MAP sensor wires:
Pin1: signal ground
Pin2: temperature output voltage
Pin3: 5V supply and reference voltage
Pin4: Pressure output voltage

in wich MAP sensor pin i must to install Zener diode?
Potenciometer must be connected to ground.... to MAP sensor ground(Pin1) or chassis ground?

Wich is the correct Ohm resistance? 100Ohm?

I suppose that boost is adjusted with potenciometer... A bigger value that 100Ohm is more or less boost? Thanks in advance..
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Some goodies! ARL pistons - PD100 rods - Ported Head - Rosten's double valve springs - ASV valves - ASV injection pump - GT18v - Race520 - FMIC (BMW530D intercooler) - PD130 fuel cooler - Lift Pump - Passat PD130 intake manifold

Last edited by Satiro; March 18th, 2008 at 04:33.
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Old March 18th, 2008, 03:02   #2
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Wich Pin is the VE wire?
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Some goodies! ARL pistons - PD100 rods - Ported Head - Rosten's double valve springs - ASV valves - ASV injection pump - GT18v - Race520 - FMIC (BMW530D intercooler) - PD130 fuel cooler - Lift Pump - Passat PD130 intake manifold
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Old March 18th, 2008, 06:09   #3
93FryGuy
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What's ve?

From what I read here the number 4 pin is what you want.
Then connect the zener diode with the negetive end to the #4 pin, then to a potentionmeter you can control, then to chassis ground. I think I have finally made sense of it for THAT car.

But that was on a different TDI engine than either of ours, so I am not sure how it works on our. I dont think we even have a MAP sensor, but then again, you are in Spain, I am in US, so dunno the differences are, its so confusing sometimes.....

On the page you got that diagram from, he said is is possible to do it with the controls I have, and I am trying to find out how this is possible, need to look around somemore, OR anyone here be kind enough to explain how this is done to a 1998 1Z TDI?
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Old March 18th, 2008, 08:54   #4
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Should this be the same for a PD?
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Old March 18th, 2008, 09:06   #5
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Wich is the approx value resistance for 1.3bar from stock map?
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SEAT IBIZA GT 1.9 TDI 110hps AFN 1997 - Tuned by Rub87
Some goodies! ARL pistons - PD100 rods - Ported Head - Rosten's double valve springs - ASV valves - ASV injection pump - GT18v - Race520 - FMIC (BMW530D intercooler) - PD130 fuel cooler - Lift Pump - Passat PD130 intake manifold

Last edited by Satiro; March 18th, 2008 at 09:15.
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Old March 18th, 2008, 11:09   #6
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Quote:
Originally Posted by Satiro
Wich is the approx value resistance for 1.3bar from stock map?
I have no zenerdiod I have only 20Kohm and that give me 1,35 bar.
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Old March 18th, 2008, 11:48   #7
mctdi
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Quote:
Originally Posted by milehighassassin
Should this be the same for a PD?
This might work on PD. But having played with bad wires to the turbo vane position sensor, only on the PDs, and seeing the requested and actual MAP & MAF values both before and after repairs; I think not likely.

As the turbo vane position sensor seems to have more input [ control ] on the running boost pressure then the MAP sensor does.

Without the turbo vane position sensor connected [ working ] actual MAP was always running about 10 PSI at cruse. This while requested MAP might be say 6 PSI. If pressure spiked to something above 13 PSI, then it was reduced, so there was still some pressure control.

With the turbo vane position sensor connected the actual MAP was always close to the requested MAP. And the same for the MAF.

Maybe Jeff-RC, or some other chipper, could add some solid insight on this matter. As I would like to know if the turbo vane position sensor does have more input to actual boost pressure than the MAP sensor?
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Old March 18th, 2008, 12:04   #8
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Quote:
Originally Posted by hakansson
I have no zenerdiod I have only 20Kohm and that give me 1,35 bar.
Ill think this will be great together with bigger nozzles, with this you move the whole map uppwards... as you do with nozzles.
But ill think this will work quite good for all.
Maybe im overworked the mod a bit.
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Old March 19th, 2008, 16:54   #9
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WOW! i installed it this morning... i installed one 3.3V zener diode and 100Ohm resistor... my boost is 1.7-2.0 bar!!! INNACEPTABLE!
I have MAF mod too... can the MAF mod to increase boost? for to obtain less boost is needed more or less that 100Ohm?
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Some goodies! ARL pistons - PD100 rods - Ported Head - Rosten's double valve springs - ASV valves - ASV injection pump - GT18v - Race520 - FMIC (BMW530D intercooler) - PD130 fuel cooler - Lift Pump - Passat PD130 intake manifold
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Old March 19th, 2008, 18:21   #10
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Dude, really.. this mod sucks ass..

When you want to do it right, use diagram that looks like the on I posted here somewhere, use an opamp..
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Old March 20th, 2008, 02:41   #11
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Please guy, can you explain a bit this diagram? What's a 1/2 LM158? Wich's the Zener value and how connect it? where goes the arrow in the low-left part of picture?
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SEAT IBIZA GT 1.9 TDI 110hps AFN 1997 - Tuned by Rub87
Some goodies! ARL pistons - PD100 rods - Ported Head - Rosten's double valve springs - ASV valves - ASV injection pump - GT18v - Race520 - FMIC (BMW530D intercooler) - PD130 fuel cooler - Lift Pump - Passat PD130 intake manifold

Last edited by Satiro; March 20th, 2008 at 02:52.
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Old March 20th, 2008, 11:12   #12
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Quote:
Originally Posted by hakansson
I have no zenerdiod I have only 20Kohm and that give me 1,35 bar.
have you installed a 20K Ohm resistor only? say that gives you 1,35bar...wich is your stock boost?
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SEAT IBIZA GT 1.9 TDI 110hps AFN 1997 - Tuned by Rub87
Some goodies! ARL pistons - PD100 rods - Ported Head - Rosten's double valve springs - ASV valves - ASV injection pump - GT18v - Race520 - FMIC (BMW530D intercooler) - PD130 fuel cooler - Lift Pump - Passat PD130 intake manifold
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Old March 20th, 2008, 19:53   #13
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Quote:
Originally Posted by Satiro
Please guy, can you explain a bit this diagram? What's a 1/2 LM158? Wich's the Zener value and how connect it? where goes the arrow in the low-left part of picture?
A "LM158" is an IC chip that has two summing amplifiers in it. This circuit only uses one amplifier, so one half [1/2 ].

The arrow is the center tap, or wiper of a 10k ohm potentiometer, variable resister.

As to the Zener Diode, the circuit looks to be missing that information.

I hope his is of some help.
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Old March 22nd, 2008, 05:51   #14
Rub87
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You use a zener as an resistor to create a stable reference voltage..

12v--> zener --> resistor
Now you have a stable voltage, as much as the zener voltage between de zener and the resistor.. Remebet this diagram I gave for using the 3 bar map man reducing the boost..

If look at the internet and use common sense you will soon find a diagram that you can use to raise boost with a 2.5bar map sensor..

The easiest way is just to use a Ge diode in series with the signal wire..

If you use the "differential amplefier"basic opamp circuit you will be able to regulate boost easy and accurate..
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Old March 22nd, 2008, 14:16   #15
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I installed a zener 3.3v diode and 1k pot... first adjust of pot gave me 1.6-1.7bar... i turned pot a bit and give me 1.3-1.4 bar sustained...

Now... when i turn on evry mod have some boost spikes, i have one boost-valve but i can't to adjust it correctly...
I use an air compressor, adjust pressure to 1.5bar in compressor gauge,connect boostvalve and adjust it for to be closed at 1.4 and start to open at 1.5... install boostvalve in engine again and drive for test... 0,6bar sustained!
wich is the method for to adjust a boostvalve?
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SEAT IBIZA GT 1.9 TDI 110hps AFN 1997 - Tuned by Rub87
Some goodies! ARL pistons - PD100 rods - Ported Head - Rosten's double valve springs - ASV valves - ASV injection pump - GT18v - Race520 - FMIC (BMW530D intercooler) - PD130 fuel cooler - Lift Pump - Passat PD130 intake manifold
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