K04 on CVT
12-17-2005, 08:20 AM
#2
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CVT is no good for huge upgrades
at least thats what I hear... supposedly the transmission can't handle a whole lot of hp. And its not cheap to repair or replace your cvt trans.
12-17-2005, 01:42 PM
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Re: CVT is no good for huge upgrades
I know CVT's tend to break but I have heard of people getting K04's on CVT cars. Maybe they are not all fragile, maybe its just the older ones??
12-17-2005, 04:15 PM
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If you upgrade 1) dyno it and 2) be prepared for it to shut down the fuel pump.
1) My ECU software was tuned on a MAHA dyno to keep it under the torque sensor fuel pump cutoff point.
2) If you exceed the limit and the sensor cuts off your fuel, it can feel like the car just died. If it doesn't recover fast enough or you substantially overshoot the limit point you'll either a) go into limp mode or b) break something faster than the limiter can protect the transmission.
Higher HP/Torque engine mods are best left to a 6-speed.
<img src="http://pictureposter.audiworld.com/20982/a4190turbo2.jpg">
<img src="http://pictureposter.audiworld.com/20982/maha219.jpg">
2) If you exceed the limit and the sensor cuts off your fuel, it can feel like the car just died. If it doesn't recover fast enough or you substantially overshoot the limit point you'll either a) go into limp mode or b) break something faster than the limiter can protect the transmission.
Higher HP/Torque engine mods are best left to a 6-speed.
<img src="http://pictureposter.audiworld.com/20982/a4190turbo2.jpg">
<img src="http://pictureposter.audiworld.com/20982/maha219.jpg">
12-19-2005, 08:33 PM
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Exactly! 220/200 HP/Torque is about as far as you want to safely go with a CVT.
I went the BEX 190 HP tweaked route. The turbo, DSMIC, and injectors are BEX while the software is German for that engine with the CVT and then checked/tweaked on a MAHA dyno.
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