econo remaps??

[pc759]

has anyone got any detail on the above.
My local revo tune agent, www.tuninguk.com, says he can do an econo chip or remap, but i am a little sceptical. I supose i could get him to do it on a trial basis but in the first instance invite members comments. As i like to drive 50-65 ish it might be of use to me in my 90 bhp tdi which i find a little gutless at 2000 rpm or below. There are many positive comments about performance chips etc eg stealth ccc tech jabba and others but not much about this aspect
Thanks Paulc

 

[spike]

Hi Paul
Most modern diesel engines run retarded injection timing. This gives cooler combustion temps which help reduce NOX emissions. The down side is that it also results in a drop in engine efficiency ( = less power and worse fuel consumption) I suspect the econ chip optimises the engine to run advanced injection timing which could make the engine run more efficiently and give around 10% improvement in power or better fuel consumption if you don't use the extra horses.
Hopefully JohnDNA may provide the professionals view on this theory

Cheers Spike

 

[tdiman]

Paul,
I can confirm having had eggbert chipped by CCCTECH that the round town economy did improve, the car far more driveable with less gear changing required, would quite happily run at 30mph in 5th gear and pull from that speed without changing down, having said that it used more juice at higher speed in fact eggbert was more economical round town than on a run.

Before chip round town 54mpg, long motorway runs around 70mph 60mpg

post chip round town 58mpg, long motorway runs around 70mph 53mpg

really stuffing it post chip, 250 miles 68mph average with 90 miles over country roads 43mpg!!!
I was late! nuff said there.

round town my average spped tank to tank would be around 22mph with around 24 hours driving on the DIS... really miss that DIS on my A4

cheers,

Mike

 

[Skipton01]

really stuffing it post chip, 250 miles 68mph average with 90 miles over country roads 43mph!!! I was late! nuff said there

Going to ADI last year, averaged 39.5mpg in Tank - mind you, cruise was set at 110mph from Brum to Wiltshire!

Cheers,

Mike

 

[tdiman]

Going to ADI last year, averaged 39.5mpg in Tank - mind you, cruise was set at 110mph from Brum to Wiltshire!

Cheers,

Mike

Yes Mike but you have about 300bhp in your tank!!! I only had 101bhp.

Not managed to batter the avant below 40mpg yet, not trying hard enough!!

Cheers,
Mike

 

[John DNA]

Well actually most power improvements without overfuelling on diesels will give you a fuel economy improvement on similar day to day driving. You find that as the low end torque is improved drivers tend to shift slightly earlier, lower engine revs are more efficient so fuel economy is improved. However if you use all the power throughout the rev range constantly then you will find additional power comes from burning more fuel, so it is entirely driving style dependant.

Selling tuning based on economy is just a nother spin on the same product, a common marketing technique within my industry.

Hope that helps.

 

[John DNA]

Hi Paul
Most modern diesel engines run retarded injection timing. This gives cooler combustion temps which help reduce NOX emissions. The down side is that it also results in a drop in engine efficiency ( = less power and worse fuel consumption) I suspect the econ chip optimises the engine to run advanced injection timing which could make the engine run more efficiently and give around 10% improvement in power or better fuel consumption if you don't use the extra horses.
Hopefully JohnDNA may provide the professionals view on this theory

Cheers Spike

Some work I have done is working with cars being imported into Asia, this was for true fuel consumption testing with the countries import labs. You'd be surprised how you can actually improve fuel consumption, with turbo's it's quite easy. As a turbo engine is more efficient than a non turbo engine, using this efficiency to it's maximum is desireable for more economy.
Other tricks are running as lean as possible but this is not recommended for the long term as overheating can become an issue all too fast.