EVRY MOD anyone done it?
- Thread starter ohara
- Start date
From another forum -
Folks,
All I can say is that Evry needs to take a place with all the rest of the TDI Gods here on the forum.
I performed the "Evry fuel mod" on my stock TDI and gained an immediate "feels like" power increase of around 15 hp.
The generalities have been posted before, here are the details..
Cost: Around $5
How-to:
1) Bridge pins 2 & 3 on the 10-pin fuel harness with a 1.5K pot. Set pot to max resistance.
2) Start car
3) SLOWLY decrease resistance from 1.5K
4) When the engine shivers (you will know, its very obious) the mod is starting to work.
5) When at around 1.2K, drive around.. you will be impressed
6) Go down to 1K ohms, drive around.. you will be MORE impressed
I've had it down to around 700 Ohms, and the idle was marginal (terrible!) but the power was un-friggin-real. Evry says he is down to around 850 Ohms and is happy there. At this setting it takes the engine a second to straighten out the idle, but its still acceptable. I'm going to replace the pot with a striaght 900 Ohm or 1K resistor and have done with it.
Most beautiful part about the mod: As good as the price is, if you use stick pins into the harness itself (at the rubber surrounding the wires), you can pull the mod out in a minute and leave no trace.
This should be mandatory for all stock or chipped TDI's sans tuning-box (who needs a TB with this mod?).
Power is very impressive.. if you dial it to the point where idle is marginal, smoke is impressive too. Otherwise, smoke is slightly more than stock. Evry has also done the equivalent of an "electric bleed" using a similar method on the MAP sensor, and as soon as I can get a boost guage, I'm doing the same.
Thanks Evry.. super cheap, simple, and effective.
Folks,
All I can say is that Evry needs to take a place with all the rest of the TDI Gods here on the forum.
I performed the "Evry fuel mod" on my stock TDI and gained an immediate "feels like" power increase of around 15 hp.
The generalities have been posted before, here are the details..
Cost: Around $5
How-to:
1) Bridge pins 2 & 3 on the 10-pin fuel harness with a 1.5K pot. Set pot to max resistance.
2) Start car
3) SLOWLY decrease resistance from 1.5K
4) When the engine shivers (you will know, its very obious) the mod is starting to work.
5) When at around 1.2K, drive around.. you will be impressed
6) Go down to 1K ohms, drive around.. you will be MORE impressed
I've had it down to around 700 Ohms, and the idle was marginal (terrible!) but the power was un-friggin-real. Evry says he is down to around 850 Ohms and is happy there. At this setting it takes the engine a second to straighten out the idle, but its still acceptable. I'm going to replace the pot with a striaght 900 Ohm or 1K resistor and have done with it.
Most beautiful part about the mod: As good as the price is, if you use stick pins into the harness itself (at the rubber surrounding the wires), you can pull the mod out in a minute and leave no trace.
This should be mandatory for all stock or chipped TDI's sans tuning-box (who needs a TB with this mod?).
Power is very impressive.. if you dial it to the point where idle is marginal, smoke is impressive too. Otherwise, smoke is slightly more than stock. Evry has also done the equivalent of an "electric bleed" using a similar method on the MAP sensor, and as soon as I can get a boost guage, I'm doing the same.
Thanks Evry.. super cheap, simple, and effective.
so what does this actually do? does it increase the amount of diesel injected in much the same way as tune it boxes etc?
It is effectively a DIY Tuning Box for a VE engine (not PD, this mod works on the distributor pump itself).
It consists of a resistor between the signal pin from the Modulating Piston Displacement Sensor (G149) and ground, reducing the amplitude of the signal, making the ECU think that the piston has moved less that it actually has. Some have implemented a variable resistor (a potentiometer) and/or a switch.
The result would be an increase in injected fuel quantity for any given throttle pedal position. You will eventually hit the limit of what the pump can supply, but it seems that increases in max power are easy to obtain, so the pump has the ability to deliver more than the original engine map requires.
My main concern is that, by falsifying one parameter to the ECU you have falsified its responses in all conditions that use that parameter. The smoke map is one example, with the mod in place, depending on the resistance used, it is very easy to produce a lot of smoke, by overfuelling.
Evry Schuiling is / was an Upsolute engineer, or so it says in the TDI Club threads.
It consists of a resistor between the signal pin from the Modulating Piston Displacement Sensor (G149) and ground, reducing the amplitude of the signal, making the ECU think that the piston has moved less that it actually has. Some have implemented a variable resistor (a potentiometer) and/or a switch.
The result would be an increase in injected fuel quantity for any given throttle pedal position. You will eventually hit the limit of what the pump can supply, but it seems that increases in max power are easy to obtain, so the pump has the ability to deliver more than the original engine map requires.
My main concern is that, by falsifying one parameter to the ECU you have falsified its responses in all conditions that use that parameter. The smoke map is one example, with the mod in place, depending on the resistance used, it is very easy to produce a lot of smoke, by overfuelling.
Evry Schuiling is / was an Upsolute engineer, or so it says in the TDI Club threads.
perhaps it would be good if someone with the right knowledge could explain how a remap differs to a mod such as this so that people can understand the difference between DIT mods, tun it boxes and the like and a remap!?
I'd say remaps are the safest way to go. No trickery and all the necessary areas are tweaked instead of just cranking up the fuelling!
Andy, I'm not a motor engineer, but I can give an overview of the difference.
The ECU has many inputs from sensors on the engine and produces outputs controlling the actuators for the engine controls.
The map relates all of the inputs to a set of outputs
Inputs include accelerator pedal position, fuel temperature, inlet air temperature and pressure, mass air flow, injector lift commencement etc etc.
Outputs include throttle butterfly position (on a petrol car), injection quantity, injection commencement, glow plug power and so on.
The Evry mod falsifies one input parameter to make the fuel quantity higher than the ECU map expects.
This works because the diesel engine almost always has more air than is needed, and burns lean at low power levels.
One consequence of this is that the injection event takes longer to complete. This means that the commencement of injection is later than it should be for the fuel quantity, as the map relies on the falsified signal.
A remap changes the actual map in the ECU. All the sensor signals are unaffected, so the ECU is still receiving correct measurements of what's going on in the engine. The new map sends different signals to the actuators, adjusting all of the controls to deliver a bigger bang at the correct time. Injection timing, quantity, EGR activation, boost pressure, etc. - all are changed in the new map to keep the engine happy.
In simple terms, the standard map keeps the engine's performance well below the point where failure of any components is predicted, even in the case of all the manufacturing tolerances adding up "the wrong way". Remapping pushes performance closer to the edge, and will reduce the life of any components on the edge of their specification. If taken too far, the engine will be overstressed and fail in a more obvious way. Because the engines (especially the lower powered TDI's) are built with a lot of extra capacity, remapping can be taken a long way without seriously affecting the engines reliability.
Having said that, every time you make a modification to the engine's performance, you take a risk that it will cause a failure somewhere. You need to be ready for that to happen, even if it isn't very likely.
The ECU has many inputs from sensors on the engine and produces outputs controlling the actuators for the engine controls.
The map relates all of the inputs to a set of outputs
Inputs include accelerator pedal position, fuel temperature, inlet air temperature and pressure, mass air flow, injector lift commencement etc etc.
Outputs include throttle butterfly position (on a petrol car), injection quantity, injection commencement, glow plug power and so on.
The Evry mod falsifies one input parameter to make the fuel quantity higher than the ECU map expects.
This works because the diesel engine almost always has more air than is needed, and burns lean at low power levels.
One consequence of this is that the injection event takes longer to complete. This means that the commencement of injection is later than it should be for the fuel quantity, as the map relies on the falsified signal.
A remap changes the actual map in the ECU. All the sensor signals are unaffected, so the ECU is still receiving correct measurements of what's going on in the engine. The new map sends different signals to the actuators, adjusting all of the controls to deliver a bigger bang at the correct time. Injection timing, quantity, EGR activation, boost pressure, etc. - all are changed in the new map to keep the engine happy.
In simple terms, the standard map keeps the engine's performance well below the point where failure of any components is predicted, even in the case of all the manufacturing tolerances adding up "the wrong way". Remapping pushes performance closer to the edge, and will reduce the life of any components on the edge of their specification. If taken too far, the engine will be overstressed and fail in a more obvious way. Because the engines (especially the lower powered TDI's) are built with a lot of extra capacity, remapping can be taken a long way without seriously affecting the engines reliability.
Having said that, every time you make a modification to the engine's performance, you take a risk that it will cause a failure somewhere. You need to be ready for that to happen, even if it isn't very likely.
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