Is it Turbo Lag?
07-24-2004, 10:50 AM
#31
Guest
Posts: n/a
Re: Is it Turbo Lag?
I have doubts that the car has been chipped. As far as I know, the car was
a lease return and was registered in Connecticut. Why would somebody mod
their car when it is not really theirs does not make sense.
A friend of mine has a 99 A4 and he says that his turbo kicks in at around
4k. I don't know if that even merits comparison.
I am thinking that it is just a matter of me getting acclimated to the cars
abilities and limits. It is after all just a 4 cylinder engine and it's an
avant (heavier than the sedan). To expect super performance is not
realistic. Expecting good performance is more like it. I still love the
car.
Thanks for all the responses. There's a bunch of good people in this ng.
I appreciate it.
- Len S.
"Hairy One Kenobi" <abuse@[127.0.0.1]> wrote in message
news:Ti7Jc.175$fO5.106@newsfe6-win.ntli.net...
> "Len S." <this@ddress.is.invalid> wrote in message
> news:eN2dncNLqdSP2WzdRVn-sw@comcast.com...
> > Well, I am definitely guilty of shifiting up at rpm's lower than you use
> > (usually around 3k) and downshift around1.8 to 2k. This car is so
easy
> > to just go sailing way past the speed limit, so I guess I'm just being
> > careful, and in doing that, I am ending up shifting just before the real
> fun
> > starts. Are you sure the turbo is fully spooled that low (1950k)?
I
> > figured the push I described in the beginning post was the point where
the
> > turbo is fully spooled. Maybe it is just the point where the gate fully
> > closes and gives all the boost.
>
> <Much snippage>
>
> http://tinyurl.com/33j42 shows a comparable power curve (IIRC, the TT225
has
> a less peaky power curve than the 180, so the torque will be even lower)
I'd
> say that 3000rpm is basically just getting onto the torque curve (around
> half of the rated power output of the engine..)
>
> Quite a few rechips lower the point where the boost comes in (mine does
the
> opposite, which I prefer, in terms of engine response - it feels much more
> like the 180 I originally test-drove. I know that this sounds odd, but a
> sharper curve and higher peak power /feels/ sportier, if you're more used
to
> tuned normally-aspirated engines)
>
> H1K
>
>
>
a lease return and was registered in Connecticut. Why would somebody mod
their car when it is not really theirs does not make sense.
A friend of mine has a 99 A4 and he says that his turbo kicks in at around
4k. I don't know if that even merits comparison.
I am thinking that it is just a matter of me getting acclimated to the cars
abilities and limits. It is after all just a 4 cylinder engine and it's an
avant (heavier than the sedan). To expect super performance is not
realistic. Expecting good performance is more like it. I still love the
car.
Thanks for all the responses. There's a bunch of good people in this ng.
I appreciate it.
- Len S.
"Hairy One Kenobi" <abuse@[127.0.0.1]> wrote in message
news:Ti7Jc.175$fO5.106@newsfe6-win.ntli.net...
> "Len S." <this@ddress.is.invalid> wrote in message
> news:eN2dncNLqdSP2WzdRVn-sw@comcast.com...
> > Well, I am definitely guilty of shifiting up at rpm's lower than you use
> > (usually around 3k) and downshift around1.8 to 2k. This car is so
easy
> > to just go sailing way past the speed limit, so I guess I'm just being
> > careful, and in doing that, I am ending up shifting just before the real
> fun
> > starts. Are you sure the turbo is fully spooled that low (1950k)?
I
> > figured the push I described in the beginning post was the point where
the
> > turbo is fully spooled. Maybe it is just the point where the gate fully
> > closes and gives all the boost.
>
> <Much snippage>
>
> http://tinyurl.com/33j42 shows a comparable power curve (IIRC, the TT225
has
> a less peaky power curve than the 180, so the torque will be even lower)
I'd
> say that 3000rpm is basically just getting onto the torque curve (around
> half of the rated power output of the engine..)
>
> Quite a few rechips lower the point where the boost comes in (mine does
the
> opposite, which I prefer, in terms of engine response - it feels much more
> like the 180 I originally test-drove. I know that this sounds odd, but a
> sharper curve and higher peak power /feels/ sportier, if you're more used
to
> tuned normally-aspirated engines)
>
> H1K
>
>
>
07-26-2004, 10:08 PM
#32
Guest
Posts: n/a
Re: Is it Turbo Lag?
Hi Len,
What you are experiencing is what's known as "boost onset". The turbo will
spool then begin to deliver a massive amount of air beginning a few RPMs
before making power. Turbo lag refers to how long after spooling to when
the engine really begins to make lots of power. It can occur at any RPM
point prior to loading (mashing the gas) the engine, including well above
the boost onset RPM.
What you feel is normal for a turbo car. It's the reason for "turbo smile"
and the "turbo smile" is why I will forever buy turbo cars.
-Guy
02 S4
02 WRX
"Len S." <this@ddress.is.invalid> wrote in message
news:zdGdnds2XYr3FnHdRVn-gQ@comcast.com...
> I have been enjoying my 02 A4 Avant 1.8T 5 spd for about six weeks now.
If
> I start off spirited, the car moves our alright, then at around 3k rpms it
> snaps me back into the seat, and I have to back off before I shift. I
am
> guessing this is what is known as turbo lag. It's kind of an awkward
> sensation.
> Is that typical of these 1.8 T engines? I am wondering if it needs to
be
> checked out. Thanks in advance.
> - Len
>
>
What you are experiencing is what's known as "boost onset". The turbo will
spool then begin to deliver a massive amount of air beginning a few RPMs
before making power. Turbo lag refers to how long after spooling to when
the engine really begins to make lots of power. It can occur at any RPM
point prior to loading (mashing the gas) the engine, including well above
the boost onset RPM.
What you feel is normal for a turbo car. It's the reason for "turbo smile"
and the "turbo smile" is why I will forever buy turbo cars.
-Guy
02 S4
02 WRX
"Len S." <this@ddress.is.invalid> wrote in message
news:zdGdnds2XYr3FnHdRVn-gQ@comcast.com...
> I have been enjoying my 02 A4 Avant 1.8T 5 spd for about six weeks now.
If
> I start off spirited, the car moves our alright, then at around 3k rpms it
> snaps me back into the seat, and I have to back off before I shift. I
am
> guessing this is what is known as turbo lag. It's kind of an awkward
> sensation.
> Is that typical of these 1.8 T engines? I am wondering if it needs to
be
> checked out. Thanks in advance.
> - Len
>
>
07-26-2004, 10:08 PM
#33
Guest
Posts: n/a
Re: Is it Turbo Lag?
Hi Len,
What you are experiencing is what's known as "boost onset". The turbo will
spool then begin to deliver a massive amount of air beginning a few RPMs
before making power. Turbo lag refers to how long after spooling to when
the engine really begins to make lots of power. It can occur at any RPM
point prior to loading (mashing the gas) the engine, including well above
the boost onset RPM.
What you feel is normal for a turbo car. It's the reason for "turbo smile"
and the "turbo smile" is why I will forever buy turbo cars.
-Guy
02 S4
02 WRX
"Len S." <this@ddress.is.invalid> wrote in message
news:zdGdnds2XYr3FnHdRVn-gQ@comcast.com...
> I have been enjoying my 02 A4 Avant 1.8T 5 spd for about six weeks now.
If
> I start off spirited, the car moves our alright, then at around 3k rpms it
> snaps me back into the seat, and I have to back off before I shift. I
am
> guessing this is what is known as turbo lag. It's kind of an awkward
> sensation.
> Is that typical of these 1.8 T engines? I am wondering if it needs to
be
> checked out. Thanks in advance.
> - Len
>
>
What you are experiencing is what's known as "boost onset". The turbo will
spool then begin to deliver a massive amount of air beginning a few RPMs
before making power. Turbo lag refers to how long after spooling to when
the engine really begins to make lots of power. It can occur at any RPM
point prior to loading (mashing the gas) the engine, including well above
the boost onset RPM.
What you feel is normal for a turbo car. It's the reason for "turbo smile"
and the "turbo smile" is why I will forever buy turbo cars.
-Guy
02 S4
02 WRX
"Len S." <this@ddress.is.invalid> wrote in message
news:zdGdnds2XYr3FnHdRVn-gQ@comcast.com...
> I have been enjoying my 02 A4 Avant 1.8T 5 spd for about six weeks now.
If
> I start off spirited, the car moves our alright, then at around 3k rpms it
> snaps me back into the seat, and I have to back off before I shift. I
am
> guessing this is what is known as turbo lag. It's kind of an awkward
> sensation.
> Is that typical of these 1.8 T engines? I am wondering if it needs to
be
> checked out. Thanks in advance.
> - Len
>
>
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