seems a bit psychosomatic to me...

Listen to what everyone has said and if your not happy with the re-map, then take it back and get jabba to remap '100%' instead of '30%' and then you wont blow up your engine!

i think you should try all three at once.. what have you got to lose ?

how do i do the resistor mod to a 2.7 bi turbo diesel? which appears to gain more from 4 extra holes in the airbox and blasting the filter out with an air line.... than it did from the boxo del tuning..... hmmm.

i think you should try all three at once.. what have you got to lose ?

how do i do the resistor mod to a 2.7 bi turbo diesel? which appears to gain more from 4 extra holes in the airbox and blasting the filter out with an air line.... than it did from the boxo del tuning..... hmmm.

Whack a 10k resistor across the signal wire from the temp guage and wait for some fun*. :rofl:

* This is b0llocks as the 10k value is one i just plucked out of my head

tried 10k... car is on fire.

Surely in theory the resistor mod on top of a remap shouldn't do any harm to the engine alone. As it's only fooling the ECU into thinking it's colder than it is? So it's only doing what the car would normally do in very cold weather without the resistor. And if that's dangerous for the engine then the map is dangerous?

Prolonged use may perhaps cause damage if the mapper has assumed that the majority of the time the car will not be used in cold weather, and even then they would have sacrificed reliability/damage to internals and hence given a partially dangerous map.

Personally I don't think it'd be a good idea. Just get the map you want in the first place? But I don;t see why people think that the resistor will take the car over the tolerance line, seeing as the map should have been coded to cope with running the car in cold weather and the resistor doesn't do anything more than a cold winter would do? Unless you assume the figures of the map take into account atmospheric cooling which wouldn't be there if you're fooling it into thinking it's cold?

Resistor does a massive job with low end grunt - trust me. It cuts in the cold weather maps up until 3250 rpm which is when the jabba map cuts in until 4800rpm I believe.

So effectivelty is the ECU is running on a VAG winter map until 3250 - bearing this in mind what exactly will the digital tuning box do and at what RPMs?

I have had all three types at different times... first the resistor, then just the digital box, then both resistor and digital box, then remap, then remap with resistor, however never all three. This is all over the last 50,000 miles with no problems.

I really miss what the digital box did for the car mid rpm range... the resistor works low rpm and the remap high rpm's.

Anyone know more about the digital tuning boxes and the way they work?

I also have to disagree about the ECU limitations... Jabba map the last 30% of the accelrator only, up until that point the car is running standard, so unless your going for it all the time the remap will not come into play. All mods can't be duplicated as you suggest cheezemonkhai.

Dragon Performance UK Ltd :: Skoda :: Skoda Fabia :: Fabia 1.4 TDI 80 I have this one.

But you have a MK I 1.4 TDI fabia, which will be the 1.4 75bhp not the 70 or 80?

I think you have a choice... do what you like, or as printed above listen to us.

I think you will find that all mods that mess around with fueling, as per resistor/dragon can be replicated by an engines ECU fueling program.

I say this with experience of programming embedded systems, which is all an ECU is.

eg if your ECU says put in 1g of fuel hot and 1.5g cold all i have to do to replicate the resistor mod is to tell it to pump in 1,5g when hot and even more when cold.

You obviously want everyone to tell you what you want to hear. I am sure Jabba will agree with what we say here and you might find they have not mapped the whole range to protect your clutch or some other engine component.

What i don't get is why you spend so much money getting a 1.4 TDI to 100ish BHP, why not just buy a 1.9 PD100 or a VRS. I'm assuming that you have the 1.4 for insurance reasons, as I think you suggested previously. At which point I do hope you have told your insurance about this lot or you won't have any if you ever need to claim.

soundest bit of advice is part ex it for a standard VRS

ps what every one else said to.

Surely in theory the resistor mod on top of a remap shouldn't do any harm to the engine alone. As it's only fooling the ECU into thinking it's colder than it is? So it's only doing what the car would normally do in very cold weather without the resistor. And if that's dangerous for the engine then the map is dangerous?

Prolonged use may perhaps cause damage if the mapper has assumed that the majority of the time the car will not be used in cold weather, and even then they would have sacrificed reliability/damage to internals and hence given a partially dangerous map.

Personally I don't think it'd be a good idea. Just get the map you want in the first place? But I don;t see why people think that the resistor will take the car over the tolerance line, seeing as the map should have been coded to cope with running the car in cold weather and the resistor doesn't do anything more than a cold winter would do? Unless you assume the figures of the map take into account atmospheric cooling which wouldn't be there if you're fooling it into thinking it's cold?

The resistor causes over fuelling, hence you could end up with issues such as coke build up in the car. Additionally the if the ECU thinks the car is cold and is injecting excessive fuel near maximum revs it could potentially cause problems.

I'd say the clutch and gearbox are most at risk, but that there is a chance that too much fuel can damage the inside of the engine too. Less so on a derv than a petrol car.

However regardless of that a resistor telling your car it is cold when it isn't will lead to excessive smoking as the engine has more fuel than it can cleanly burn, and as such will emit unburned fuel as soot.

BTW... WOT doesn't exist on a derv, they don't have a throttle

no, dont knock the lad... unless he tries it the rest of us wont know whether it works....

i can vouch for a number of mods that dont work for an octy on this basis.

The digital tuning box does not fool it into running a 'winter map', it alters the fueling but not the turbo.

A resistor does absolutely nothing, doesn't give you bags of low down grunt, it just makes the enginer htink its a bit colder.

tried 10k... car is on fire.

Damn must have made it hot, when it was cold... try the other wire when you have put the fire out :rofl:

The digital tuning box does not fool it into running a 'winter map', it alters the fueling but not the turbo.

A resistor does absolutely nothing, doesn't give you bags of low down grunt, it just makes the enginer htink its a bit colder.

Both of which can be done by a map

A resistor does absolutely nothing, doesn't give you bags of low down grunt, it just makes the enginer htink its a bit colder.

...... which in turn injects more fuel ..... which in turn gives you more low down grunt

Chris

Nice bit of banter

Anyway does anyone technically know what exactly the PD digital tuning boxes do and how?

If not I heard all the rest over 50k ago when I asked if anyone had run two of the go faster mods together.

Thanks to those of you who read and think before replying

Digital boxes fool the car into injecting more fuel. It depend on the setting its on to where the 'power' will be. Start injecting around 1.8 - 2k

Low setting = all torque down low

High setting = max torque is shifted up the graph

HTH

...... which in turn injects more fuel ..... which in turn gives you more low down grunt

Chris

Correct!

How many people who are telling us the resistor does nothing, have actually been and bought one, and tried it?

I bought one...expecting nothing...and got a surprise. It works.

Nowhere near as much as a tuning box or re-map (obviously) but you do get an increase in low end torque.

You may get a marginal increase in power, but it will screw up your EGR mech.

You may get a marginal increase in power, but it will screw up your EGR mech.

I've noticed that quite a few remapped TDI's tend to over-fuel/soot in certain cenarios - do these run a similar risk of EGR damage and manifold coking?

Just to put a spanner in the works....I thought the resistor Mod made the ECU think the fuel was hotter not colder...If it thinks the fuel is hotter it Injects more because the fuel density decreases as it gets hotter...if it thought the fuel was at sub zero temps it would then inject less because the fuel is denser than it would be at ambient temps...also Diesels dont need to inject more fuel when the engines cold only petrols do that because the petrol condenses on a cold engine so not all of it burns correctly so they just whack a load more fuel in to overcome this.........If I am on the wrong tack feel free to slap me across my chops lol

I'm still sticking with my psychosomatic diagnosis...

*tim*

You said: "Digital boxes fool the car into injecting more fuel. It depend on the setting its on to where the 'power' will be. Start injecting around 1.8 - 2k

Low setting = all torque down low

High setting = max torque is shifted up the graph"

Can you explain more? Does the adjustment pins on these boxes change where the power is developed?

Decron, you said:

"You may get a marginal increase in power, but it will screw up your EGR mech."

Is this running all three mods together? What if my EGR is switched off anyway?

Thanks

there is a multiple user quote function you know

there is a multiple user quote function you know

you're right

Can you explain more? Does the adjustment pins on these boxes change where the power is developed?

Maybe, and yes

Straight from the horses mouth, so to speak

The maximum power figs don't vary that much, the rpm level they peak at does, the economy map is just for mpg - so it has all the torque at 1500rpm and nothing over 3500rpm. The normal power and economy map will come in at 1500 and run to 4500 the max power map will do the same but run a bit harder above 3500 but the mpg will suffer on that map.[/size']

okay, I know the above refers to the newer style dragon boxes which can hold upto 3 different maps, but I'm pretty sure its the same with the older style ones. Think of 'Power and economy' = pin 1, 'Normal' = pin 4, 'Max power' = pin 7.

Best thing to do is to experiment, but personally I wouldn't be mixing a tuning box with a remap, but your car your rules

You may get a marginal increase in power, but it will screw up your EGR mech.

Really? First I've heard of that

Chris

Just to put a spanner in the works....I thought the resistor Mod made the ECU think the fuel was hotter not colder...If it thinks the fuel is hotter it Injects more because the fuel density decreases as it gets hotter...if it thought the fuel was at sub zero temps it would then inject less because the fuel is denser than it would be at ambient temps...also Diesels dont need to inject more fuel when the engines cold only petrols do that because the petrol condenses on a cold engine so not all of it burns correctly so they just whack a load more fuel in to overcome this.........If I am on the wrong tack feel free to slap me across my chops lol

The resistor is put in the signal wire from the temp sensor, which reduces the voltage4 sent from the sensor to the ECU. In turn the car then believes the temperature to be colder than it really is an injects more fuel.

So yes you will get a power increase, but you must be aware there are side effects to this. This is more dangerous when included with a map.

The dragon boxes, don't contain "maps" they just increase voltages on the correct lines from/to the ECU to increase the amount of fuel injected.