S4-2004, I think that throttle problem is *real*.
11-12-2003, 12:05 PM
#41
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Actually, I think that's just a function of flywheel weight
and spun mass in general; rotational inertia. This is an aluminum engine; it's capable of spinning down *very* fast.
11-12-2003, 12:07 PM
#42
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Persevere man, help me fix the car
instead of believing that it just stinks.
Your situation suggests that not only is there a component that might not be behaving up to specs, but that it might be subject to failing in the field, not just shipping failed.
Your situation suggests that not only is there a component that might not be behaving up to specs, but that it might be subject to failing in the field, not just shipping failed.
11-12-2003, 12:20 PM
#43
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well...
the bmw has a racing flywheel on it...that would be very light...so...........
but it very might well be the flywheel on our cars. It might take some time to actually slow down since they are dual-mass, correct?
But, the my B5 was dual-mass to and I NEVER noticed this. Only with v8s.
but it very might well be the flywheel on our cars. It might take some time to actually slow down since they are dual-mass, correct?
But, the my B5 was dual-mass to and I NEVER noticed this. Only with v8s.
11-12-2003, 12:25 PM
#45
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yeah. again, I think it's two different issues.
the engine spins down at whatever speed it does.
We are talking about cars that <i>keep accelerating</i> after you lift the throttle. That is <b>VERY</b> different from a car that simply takes a while to slow down. What you are describing can only explain maintaining speed, not increasing it.
We are talking about cars that <i>keep accelerating</i> after you lift the throttle. That is <b>VERY</b> different from a car that simply takes a while to slow down. What you are describing can only explain maintaining speed, not increasing it.
11-12-2003, 01:27 PM
#47
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Re: S4-2004, I think that throttle problem is *real*.
Ok i "HAD" the same problem ,, i know exactly what your talkin about , but the problem seemed to go away after about 1500miles . I have 2600 on the car now....no sighn of anymore throttle problems
11-12-2003, 02:50 PM
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Re: excellent, octane?, stcik vs auto
great explanation, i thought you kept it pretty simple for such a challenging issue.
Predictable behavior is key, but must be second to stability in the loop control. One would hope they could do better than apparently they have.
Torque "mgmt" - even on sticks? i always figured they did this on automatics, but was hoping not on sticks.
Guessing that octane could alter behavior, but may still be stuck with unpredictable variations, any comments?
Man it would be really cool if somehow you could be given access to the design (code plus sensors) to assess what they are reacting to and managing. This seems highly unlikely.
Predictable behavior is key, but must be second to stability in the loop control. One would hope they could do better than apparently they have.
Torque "mgmt" - even on sticks? i always figured they did this on automatics, but was hoping not on sticks.
Guessing that octane could alter behavior, but may still be stuck with unpredictable variations, any comments?
Man it would be really cool if somehow you could be given access to the design (code plus sensors) to assess what they are reacting to and managing. This seems highly unlikely.