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[Ross]

I have got to emit im very intreged. I find the 2.5TD a bit slow and the fuel consumption a bit high, I have even put magnets on the fuel line to save diesel. My cars an auto and it sounds like there are higher risks with autos, But I still would like to see the difference. Can anyone recommend a tunning company or a good chip set?
Ross

[TheBoy]

I have got to emit im very intreged. I find the 2.5TD a bit slow and the fuel consumption a bit high, I have even put magnets on the fuel line to save diesel. My cars an auto and it sounds like there are higher risks with autos, But I still would like to see the difference. Can anyone recommend a tunning company or a good chip set?
Ross

With the std AR25 auto, you can't do anything.  The engine is detuned to 250Nm/120bhp to match the gearbox max torque (250Nm).  Running the car standard, being right on the limit of what gearbox can take, often causes premature failure of autobox.

To increase power, you need to either:
1) Replace AR25 with AR35 (slightly higher geared, which is apparent around 45-55mph)
2) Convert to manual.

[Omegatoy]

cars up to P reg all have eprom carriers, after that you have to solder!!
based on the 7 or 8 we have done, only one we couldnt was an Rplate  as it was without a carrier its not insurmountable but ,in the time we had we were unable to do it,
Omegatoy

[VXL V6]

Can an ECU with surface mounted components be substituted with one that doesn't have surface mounted components?

[stuvaux]

I have got to emit im very intreged. I find the 2.5TD a bit slow and the fuel consumption a bit high, I have even put magnets on the fuel line to save diesel. My cars an auto and it sounds like there are higher risks with autos, But I still would like to see the difference. Can anyone recommend a tunning company or a good chip set?
Ross

With the std AR25 auto, you can't do anything.  The engine is detuned to 250Nm/120bhp to match the gearbox max torque (250Nm).  Running the car standard, being right on the limit of what gearbox can take, often causes premature failure of autobox.

To increase power, you need to either:
1) Replace AR25 with AR35 (slightly higher geared, which is apparent around 45-55mph)
2) Convert to manual.

Is this also true if the 2.5V6 is chipped, as I thought this also used the AR25?
Mine has been chipped (using an M-tek chip) for around 2 yrs now, and have had no problems up to now.....

Stu

[Marks DTM Calib]

I have got to emit im very intreged. I find the 2.5TD a bit slow and the fuel consumption a bit high, I have even put magnets on the fuel line to save diesel. My cars an auto and it sounds like there are higher risks with autos, But I still would like to see the difference. Can anyone recommend a tunning company or a good chip set?
Ross

With the std AR25 auto, you can't do anything.  The engine is detuned to 250Nm/120bhp to match the gearbox max torque (250Nm).  Running the car standard, being right on the limit of what gearbox can take, often causes premature failure of autobox.

To increase power, you need to either:
1) Replace AR25 with AR35 (slightly higher geared, which is apparent around 45-55mph)
2) Convert to manual.

Is this also true if the 2.5V6 is chipped, as I thought this also used the AR25?
Mine has been chipped (using an M-tek chip) for around 2 yrs now, and have had no problems up to now.....

Stu

On a normaly aspirated petrol you are unlikely to do much to peek torque by chipping and the petrol has quite a bit less torque than the 250 max of the box.

[stuvaux]

I have got to emit im very intreged. I find the 2.5TD a bit slow and the fuel consumption a bit high, I have even put magnets on the fuel line to save diesel. My cars an auto and it sounds like there are higher risks with autos, But I still would like to see the difference. Can anyone recommend a tunning company or a good chip set?
Ross

With the std AR25 auto, you can't do anything.  The engine is detuned to 250Nm/120bhp to match the gearbox max torque (250Nm).  Running the car standard, being right on the limit of what gearbox can take, often causes premature failure of autobox.

To increase power, you need to either:
1) Replace AR25 with AR35 (slightly higher geared, which is apparent around 45-55mph)
2) Convert to manual.

Is this also true if the 2.5V6 is chipped, as I thought this also used the AR25?
Mine has been chipped (using an M-tek chip) for around 2 yrs now, and have had no problems up to now.....

Stu

On a normaly aspirated petrol you are unlikely to do much to peek torque by chipping and the petrol has quite a bit less torque than the 250 max of the box.

Thanks Mark, thats what I was hoping.....

Stu  

[TheBoy]

Can an ECU with surface mounted components be substituted with one that doesn't have surface mounted components?

They are not surface mounted eproms. Later ones aren't socketed, so you need to unsolder chip, solder in new socket, then fit new chip.

You can not swap the earlier ECU for later one and vice versa

[cem_devecioglu]

I have got to emit im very intreged. I find the 2.5TD a bit slow and the fuel consumption a bit high, I have even put magnets on the fuel line to save diesel. My cars an auto and it sounds like there are higher risks with autos, But I still would like to see the difference. Can anyone recommend a tunning company or a good chip set?
Ross

With the std AR25 auto, you can't do anything.  The engine is detuned to 250Nm/120bhp to match the gearbox max torque (250Nm).  Running the car standard, being right on the limit of what gearbox can take, often causes premature failure of autobox.

To increase power, you need to either:
1) Replace AR25 with AR35 (slightly higher geared, which is apparent around 45-55mph)
2) Convert to manual.

Is this also true if the 2.5V6 is chipped, as I thought this also used the AR25?
Mine has been chipped (using an M-tek chip) for around 2 yrs now, and have had no problems up to now.....

Stu

On a normaly aspirated petrol you are unlikely to do much to peek torque by chipping and the petrol has quite a bit less torque than the 250 max of the box.

yep..according to book 227

[Ross]

What is an AR25 and a AR35? And where do I buy it from?

[tunnie]

What is an AR25 and a AR35? And where do I buy it from?

AR25 is the name for a type of Automatic gearbox

25 stands for 250Nm of torque it can handle, ie the AR35 can handle 350nm.

You are chipping your TD to produce 300Nm, so if you do chip it, you WILL blow your auto gearbox very quickly.... talking few hundred miles here  

[TheBoy]

What is an AR25 and a AR35? And where do I buy it from?

AR25 and AR35 are the automatic gearboxes fitted to most Omegas.  The AR25 is fitted to all but the 3.0 and 3.2 petrols, which have AR35 fitted.

You can pick them up from scrapyards or people breaking car, but make sure that its a good working one, as they are a bit of a pain to change

[RichardH]

I have had my 2.2DTI chipped from the standard 118bhp and is now in or around 145bhp.  Well it was not really chipped, rather remapped.  Nice big difference in power and torque but my g/f's 130bhp passat can still blow it out of the water.

[Pitchfork]

I have had my 2.2DTI chipped from the standard 118bhp and is now in or around 145bhp.  Well it was not really chipped, rather remapped.  Nice big difference in power and torque but my g/f's 130bhp passat can still blow it out of the water.

I think the references to destroying the AR25 box refer to the BMW 6 cylinder engine rather than your 2.2 GM one
IW

[TheBoy]

I have had my 2.2DTI chipped from the standard 118bhp and is now in or around 145bhp.  Well it was not really chipped, rather remapped.  Nice big difference in power and torque but my g/f's 130bhp passat can still blow it out of the water.

I think the references to destroying the AR25 box refer to the BMW 6 cylinder engine rather than your 2.2 GM one
IW

2.2DTi never had an auto option, they are all manuals, so don't suffer the melting gearbox issue