Two more questions about chips.
01-15-2002, 03:28 PM
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Two more questions about chips.
Not wishing to play the role of skeptic, but if
chips increase power by roughly 10% for only $600 or so, why doesn't Audi put them in as standard equipment?
Secondly, exactly how are chips installed on the TT?
Thanks.
chips increase power by roughly 10% for only $600 or so, why doesn't Audi put them in as standard equipment?
Secondly, exactly how are chips installed on the TT?
Thanks.
01-15-2002, 03:55 PM
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I think it is more for quality control then anything else, except my emissions in the US
But honestly all engines are not created equal. I think they tone down performance to the point where fewer problems present themselves rather then giving the customer the max. performance at the cost of added stress to key components. I think it comes down to the $$$. Would Audi sell as many TT's if they ran at max power vs. if they ran at degraded power? I mean sure they might not sell QUITE as fast, but they would sell no matter what. Plus I think we have shown that Audi is very $$$ picky. They would rather sell at car at $40,000 and spend $3000 on repairs over the warranty period. Rather then spend $10,000 over the same period because the higher boost or whatever caused more small defects to pop out. Just my 2 cents.
01-15-2002, 05:49 PM
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All cars engines are de-tuned. Audi isn't alone. It has to do with reliability and has
nothing to do with emission. Chips and other speed parts are made for almost every performance car. Example: you could purchase a Z06 Corvette and install and a supercharger and have a 500 HP car thats emission legal.
01-15-2002, 06:27 PM
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Boost is regulated to maintain a brake mean effective pressure of 19.73 bar in the cylinders
during the period of peak torque. It would cost Audi $0 to change the boost, fuel & timing maps to what the chip tuners use. It's based strictly on durability (emissions testing is never done at this power level). The new Bugatti 8.0 L W16 has similar limit settings of 19.7 bar during peak torque & 18.4 bar at peak power. They manage to get 987 HP & 6000 rpms & 922 ft lbs @ 2200 to 5500 rpms. Very similar to the TT's peaks at 5900 rpm & 2200 to 5500 rpms. Only difference is W16 is 4 valve. Compression ratio is the same. If you use the metric power and torque units you will see it is exactly the same per liter as the 225TT. 8.0/1.8 736/165 & 1250/280
P.S. left side of graph is charge absolute pressure, right side brake mean effective pressure<ul><li><a href="https://forums.audiworld.com/tt/msgs/391119.phtml">graph link</a></li></ul>
P.S. left side of graph is charge absolute pressure, right side brake mean effective pressure<ul><li><a href="https://forums.audiworld.com/tt/msgs/391119.phtml">graph link</a></li></ul>
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