I've got a 2002 A4 2.5TDI Avant Quattro (180bhp) and am considering chipping it.
I've contacted a number of tuning shops and have been quoted power hikes of between 25 and 42 bhp. In addition the torque goes from 273 lb ft for the standard car to between 310 and 340 lb ft in the modified car.
I guess the extra torque is the killer (the S4 develops 344bhp but only 300 lb ft). Is the extra torque especially at the 340 lbft end of things going to overstress the engine and/or transmission. I've heard that other cars which have been chipped sometimes slip their clutch. Or will restraint in 1st and 2nd gears be enough. What is the design tolerance built into these cars? (PS it is a manual)
Any thoughs appreciated.
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Nice motor.....what I'd like!
I'd go to the Superchips website www.superchips.co.uk and perhaps ask them directly.
My opinion? It'll take it no problem, obviously restraint in 1st & 2nd gears will help the transmission.
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Quattro should be slightly less problematic than a 2WD as the extra power will be spread across four driving wheels.
Obvious single point of failure is the clutch, however you are obviously aware of the issues and would drive accordingly.
Try www.upsolute.com - They install and optimise to your car which sounds better than getting a one size fits all chip.
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sitecode;
How will it affect your insurance - I'd find that out first!
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And, especially if you can do so anonymously, the manufacturer's warranty.
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If you're not happy with only 180bhp (conservative estimate BTW) and 300lb.ft (likewise) do it.
I know this engine well and it is properly built.
You could alter the fuelling yourself, via VagCom, you know.
We did this to satisfy Euro3 and forthcoming Euro4, in case you are wondering.
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Sean;
Are you the good Dr, Piech by any chance?
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Don't buy an early 2.5 TDi unless you like oil leaks.....
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Care to elaborate? And which engine do you mean? There have been 2.5 TDis for about 10 years, so this car is hardly an early one in that sense, although the 180 bhp, six cylinder version hasn't been around for that long.
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When did the V6 TDi engine come out? Early '98?
Those early engines gave problems with oil leaks, according to an Audi Technician who lives locally. This was his advice when I was looking for one.
I agree, the 180 V6 TDi should be OK, as it is a later model.
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