CLS & S4 -- who wins?

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Old May 27, 2001 | 12:38 AM
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CLS & S4 -- who wins?

Sheeeit...of course the S4..

Ran with a silver S4 (lowered with rims) on straightaway across I-90 bridge. Pulled up to 120MPH (I shoulda left the car in 3rd before shifting to fourth..I woulda had a chance...)...

It kept pulling and pulling away. By the time I hit about 130MPH, the S4 was already 10 car lengths ahead.

Audi S4's are awesome cars...damn, it's fast. Oh well, I still enjoy this luxo-sport ride of mine.

(I got that damn Blinking gear in SS mode. If only I would shift to fourth after almost hitting redline, I think he wouldn't be pulling ahead so quickly)

Just thought I'd make sure no one here can say they can smoke an S4...with a stock CLS w/springs/sways.

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Old May 27, 2001 | 01:00 AM
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i wanted an s4 or a6 2.7tt, but then visited the audi forun, and found out that even though the audi is faster it does not realy matter b/c it will be in the shop b4 the race is over

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Old May 27, 2001 | 01:03 AM
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They're a touch out of our league LOL. No one makes such claims rationally. I have heard though many problems have arisen from them.

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Old May 27, 2001 | 02:19 AM
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My brother has an A6 2.7T, its a nice car....I have also driven the S4 a few times.

The problem is that they really stink with repeated runs.....romp on the car from a few stop lights, its done- you have to let it cool down.

An auto S4 is no great shakes.


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Old May 27, 2001 | 05:28 AM
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yah i raced one before... no contest

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Old May 27, 2001 | 06:41 AM
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<font face="Verdana, Arial" size="2">Originally posted by Beltfed:

The problem is that they really stink with repeated runs.....romp on the car from a few stop lights, its done- you have to let it cool down.

Beltfed
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</font>
Why do you have to let it "cool" down? Cause of the turbos overheating? Then what is the purpose of an intercooler? I thought the intercoole was mean to cool the turbos down?
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Old May 27, 2001 | 07:09 AM
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The intercooler only reduces the temperature of the intake charge. It does little to cool the turbo itself, even less to the half of the turbo handling the exhaust stream.

To not have to drive around to circulate motor oil to cool a hot turbo, you have to install a turbo timer, which keeps the engine running for a period of time after you've stopped and left the car.

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Old May 27, 2001 | 07:14 AM
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So that means turbo charged vehicles cannot contiuously run at hi-speeds (100mph+)? I do understand that cars like the twin turbo 300ZX stays "idle" even after you turn the car off..but I never really knew why.

So does that mean cars like the S4 must "cool down" before they can try to speed?

<font face="Verdana, Arial" size="2">Originally posted by DtEW:
The intercooler only reduces the temperature of the intake charge. It does little to cool the turbo itself, even less to the half of the turbo handling the exhaust stream.

To not have to drive around to circulate motor oil to cool a hot turbo, you have to install a turbo timer, which keeps the engine running for a period of time after you've stopped and left the car.

</font>
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Old May 27, 2001 | 07:33 AM
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<font face="Verdana, Arial" size="2">Originally posted by DDT-TypeS:
So that means turbo charged vehicles cannot contiuously run at hi-speeds (100mph+)?</font>
Well, actually they can. As long as motor oil is circulating, it's cooling the spindle. It's only when the engine is suddenly shut off and motor oil ceases to circulate that temperature at the spindle rises to the point where motor oil starts to carbonize.

<font face="Verdana, Arial" size="2">Originally posted by DDT-TypeS:
So does that mean cars like the S4 must "cool down" before they can try to speed?</font>
No. It just means that they shouldn't be brought to a sudden stop (meaning engine kill) after a period of hard running.

OTOH, I've heard horror stories about the 3rd-gen RX-7, and how early iterations had insufficient heat shielding separating the turbo from one of the front brakes. A period of sustained hard running would heat the turbo and cook the front brake, which is extremely bad because for most poeple the "hard running" usually means WOT. Imagine suffering from massive brake fade even before you start braking at 150mph.

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Old May 27, 2001 | 07:53 AM
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DteW-

You are very insightful!! thanks!!!

<font face="Verdana, Arial" size="2">Originally posted by DtEW:
No. It just means that they shouldn't be brought to a sudden stop (meaning engine kill) after a period of hard running.

OTOH, I've heard horror stories about the 3rd-gen RX-7, and how early iterations had insufficient heat shielding separating the turbo from one of the front brakes. A period of sustained hard running would heat the turbo and cook the front brake, which is extremely bad because for most poeple the "hard running" usually means WOT. Imagine suffering from massive brake fade even before you start braking at 150mph.

</font>
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Old May 27, 2001 | 08:30 AM
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s4 allll the way

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Old May 27, 2001 | 01:17 PM
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<font face="Verdana, Arial" size="2">Originally posted by DtEW:
The intercooler only reduces the temperature of the intake charge. It does little to cool the turbo itself, even less to the half of the turbo handling the exhaust stream.

To not have to drive around to circulate motor oil to cool a hot turbo, you have to install a turbo timer, which keeps the engine running for a period of time after you've stopped and left the car.

</font>
DTew is correct. What cools the turbocharger is the oil circulating in it which is shared with the same oil that is used for the engine in general. That is why synthetic oils is a very good idea for forced fed applications.



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Old May 27, 2001 | 01:20 PM
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<font face="Verdana, Arial" size="2">Originally posted by DtEW:
No. It just means that they shouldn't be brought to a sudden stop (meaning engine kill) after a period of hard running.

OTOH, I've heard horror stories about the 3rd-gen RX-7, and how early iterations had insufficient heat shielding separating the turbo from one of the front brakes. A period of sustained hard running would heat the turbo and cook the front brake, which is extremely bad because for most poeple the "hard running" usually means WOT. Imagine suffering from massive brake fade even before you start braking at 150mph.

</font>

Saw this one only after I wrote the previous post. That is all correct.

Of course the RX7 was probably the most problematic forced fed car of the 90s due to the fact that rotor engines run much, much hotter than reciprocal ones. But still, it's all right.


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Old May 27, 2001 | 01:39 PM
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I couldn't have explained it better than some of the above responses....the S4 just doesn't perform up to its full potential after several runs, its still fast....but its one of the main problems with the car.

Anyway, despite how great the car is...the styling is ancient, if you don't get it in a wacky color (Imola Yellow, Nogaro Blue)- it essentially looks like a regular A4 (makes a nice sleeper I guess)....the S4 came out too late, should have been on the market 2-3 years ago.

[This message has been edited by Beltfed (edited 05-27-2001).]
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Old May 27, 2001 | 02:13 PM
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Shia... Once I get out of my little po-dunk city I'm in that doesn't have an Audi dealership, I'm all over that S4!

I think anyone is crazy if they expect a forced induction car to be as reliable as a NA car.

That is the trade off for extra performance! Generally in life, its pretty rare that you get something for nothing.

The nice thing about the S4's is that they at least have chips for the tiptronic that fix most of the things people always gripe about.

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Old May 27, 2001 | 02:22 PM
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Id pick an S4 over the CL-S anyday. It was just out of my budget when I was looking.

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Old May 27, 2001 | 09:07 PM
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S4's are tight. If it weren't for Audi having numerous reliability problems, it would be one of my next car choices.

Yup, their turbos smell horrible. I raced my friend's TT AWD roadster 3 times (when I was stock), first time I lost by 3 car lengths (off the line he beat me by 4-5 car lengths), second by two, last by barely a car length. I should've raced him a couple more times, but he said that was enough When we parked, all I could smell is that nasty clutch. It smelled worse than air bags.
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Old May 28, 2001 | 02:38 AM
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<font face="Verdana, Arial" size="2">Originally posted by SpeedyRonin:
S4's are tight. If it weren't for Audi having numerous reliability problems, it would be one of my next car choices.

Yup, their turbos smell horrible. I raced my friend's TT AWD roadster 3 times (when I was stock), first time I lost by 3 car lengths (off the line he beat me by 4-5 car lengths), second by two, last by barely a car length. I should've raced him a couple more times, but he said that was enough When we parked, all I could smell is that nasty clutch. It smelled worse than air bags.
</font>
Well, if you were smelling the clutch like that, it's more likely a driver. problem than an engineering problem.

As for reliability, I've had my A4 for almost 3 years, and no major problems. As for the design being dated, well, it's only 4 years old and is being redesigned this fall.

Now I just need to decide whether to stay brand loyal to Audi, switch to a CL-S or consider a BMW. Decisions, decisions... :-)

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