Cheap Performance Upgrade?

[thefoolmccool]

Has any one ever tried this
http://forums.tdiclub.com/showthread.php?t=12165




Any opinions or experiences?

[monday]

hmmm, creating a fuel rich mixture doesn't necessarily mean added BHP , if it did everyone would ride with the coke full open.

the best, as safest way to increase power and help fuel consumption is to add a cold air intact, ie creating a more oxygen rich mixture , most cars run mildly starved due the the heat of the air getting in though the OEM air filter.

[thefoolmccool]

Ive just done this with a 1k pot and set it to around 700 ohms.

WHAT A DIFFERENCE!!!

Car goes so well and there is no smoke or dodgy idle. Highly reccommended!!

And these TDi engines run with an excess of air - so adding extra fuel increases the output of the engine. If there is no smoke this would suggest the fuel to air ratio is not too bad

[Eshrules]

Ive just done this with a 1k pot and set it to around 700 ohms.

WHAT A DIFFERENCE!!!

Car goes so well and there is no smoke or dodgy idle. Highly reccommended!!

And these TDi engines run with an excess of air - so adding extra fuel increases the output of the engine. If there is no smoke this would suggest the fuel to air ratio is not too bad

utter tosh, IMHO, all you're doing is dumping fuel, you're not burning it, because the ECU hasn't been instructed to burn the extra fuel you're dumping in there.

There is no such thing as a cheap BHP increase, only a proper tuning box, or a remap will do.

My advice to you, get shut of the above modification and thank me in 12 months time when you still have an engine.

[euroslap]

There Is No Such Thing As A Cheap Bhp Increase, Only A Proper Tuning Box, Or A Remap Will Do.

My Advice To You, Get Shut Of The Above Modification And Thank Me In 12 Months Time When You Still Have An Engine.

Amen!!!

Just edited, realised I'm up to my usual trick of reading half the thread and commenting. You're always catching me out Smokey.

Yes if the fuel gets to the pot it goes bang, might be too rich or too lean at this point but either way it goes bang.

[smokey0123]

utter tosh, IMHO, all you're doing is dumping fuel, you're not burning it, because the ECU hasn't been instructed to burn the extra fuel you're dumping in there.

There is no such thing as a cheap BHP increase, only a proper tuning box, or a remap will do.

My advice to you, get shut of the above modification and thank me in 12 months time when you still have an engine.

The diesel is burnt by the heat generated from the compression on diesel engines. The ECU does not tell the diesel to burn.

[thefoolmccool]

utter tosh, IMHO, all you're doing is dumping fuel, you're not burning it, because the ECU hasn't been instructed to burn the extra fuel you're dumping in there.

There is no such thing as a cheap BHP increase, only a proper tuning box, or a remap will do.

My advice to you, get shut of the above modification and thank me in 12 months time when you still have an engine.

Where does the extra power come from then???

And since there is no big puffs of black smoke the engine isn't overfuelling too bad.

If I had a decent car I might consider spending the money to have remap/chip etc but this is only a runaround and I'm not that fussed - hence the cheap upgrade title.

This mod tricks the fuel temp sensor into believing the fuel is warmer (less dense) and therefore injects more diesel to compensate. This is essentially the method all tuning boxes operate on albeit some are a little more complicated with funky waveform control signals etc.

There are several tributes on the above site that have been running this mod for many miles with no adverse effect.

Personally I think this is a worthwhile cheap performance mod, well worth the £4 i spent on it!!!

[borderraiderdk]

Hi chaps

If the engine is running lean at full throttle, such a modification WILL give a power increase (at full throttle)
What would be really interesting would be to get it on a rolling road with a gas analyser and see the numbers.

Cheers
David

[Eshrules]

The diesel is burnt by the heat generated from the compression on diesel engines. The ECU does not tell the diesel to burn.

so the ECU is not responsible for regulating the quantities of fuel injected? Sorry, my bad, after spending many hours watching remappers at work, that's what I had learnt, perhaps you could explain how you've come to a conclusion to the contrary?

Where does the extra power come from then???

indeed, where 'is' the extra power you're so proudly proclaiming to now have? I presume you've had the car dyno'd to verify this astounding fact.

Truth be told, if what you say is true, then why would we all bother to have remaps, when we can just trick the ECU into thinking the engine is cold all the time?

And since there is no big puffs of black smoke the engine isn't overfuelling too bad.

granted, however, this does not mean the engine is not being overfuelled full stop, does it?

This mod tricks the fuel temp sensor into believing the fuel is warmer (less dense) and therefore injects more diesel to compensate. This is essentially the method all tuning boxes operate on albeit some are a little more complicated with funky waveform control signals etc.

with all due respect, you're teaching grandma to suck eggs, I know exactly what this modification does, I've seen it discussed far and wide for a long time and the general consensus remains the same....

There are several tributes on the above site that have been running this mod for many miles with no adverse effect.

Ahha.... but the same justification is applied to terrorism by terrorists, does that make it right? .....

As said, I care for my diesel engine, fooling the ECU into thinking the engine is colder than it actually is, is not, IMHO, a good thing.

[thefoolmccool]

so the ECU is not responsible for regulating the quantities of fuel injected? Sorry, my bad, after spending many hours watching remappers at work, that's what I had learnt, perhaps you could explain how you've come to a conclusion to the contrary?



indeed, where 'is' the extra power you're so proudly proclaiming to now have? I presume you've had the car dyno'd to verify this astounding fact.

Truth be told, if what you say is true, then why would we all bother to have remaps, when we can just trick the ECU into thinking the engine is cold all the time?



granted, however, this does not mean the engine is not being overfuelled full stop, does it?




with all due respect, you're teaching grandma to suck eggs, I know exactly what this modification does, I've seen it discussed far and wide for a long time and the general consensus remains the same....



Ahha.... but the same justification is applied to terrorism by terrorists, does that make it right? .....

As said, I care for my diesel engine, fooling the ECU into thinking the engine is colder than it actually is, is not, IMHO, a good thing.

Fair enough. I reckon I will run it for a while and see if there are any adverse effects. The only potential problems I forsee are increased carbon build up - but I am going to keep an eye on MPG figures as a crude indication of this. The other problem miht be high EGT - I don't know how to keep an eye on this without expensive instrumentation.

Anyway , as I said, this car is only a runabout and I'm not too worried about it.