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YOUR RESEARCHnew C4S owner questions before track day
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Use 32f/38r cold
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Suggestion · Original poster
Two questions: Cold tire pressures for a track day - should I be adding 3-5 lbs of extra air over and above recommended on the Conti Sport 2's?
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Suggestion
</font> <font size="2" face="Verdana,Tahoma,Helvetica">Prety much everyone agrees that the recommended tire pressures are more for fuel economy than performance.
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</font> <font size="2" face="Verdana,Tahoma,Helvetica">Prety much everyone agrees that the recommended tire pressures are more for fuel economy than performance.
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I am the lucky owner of a new 02 C4S. I have not had any real opportunity yet to drive it aggressively. My impression is that it understeers more than a c2.
Two questions: Cold tire pressures for a track day - should I be adding 3-5 lbs of extra air over and above recommended on the Conti Sport 2's?
To help with understeer should I try adding less air to the fronts?
I have some track experience with C2's - anything I should be doing different - or expect to be different with the C4S?
Thanks in advance.
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica"> I am the lucky owner of a new 02 C4S. I have not had any real opportunity yet to drive it aggressively. </font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Congratulations on your new car! It will love to be driven aggresively at the track.
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica"> Two questions: Cold tire pressures for a track day - should I be adding 3-5 lbs of extra air over and above recommended on the Conti Sport 2's?
To help with understeer should I try adding less air to the fronts </font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Prety much everyone agrees that the recommended tire pressures are more for fuel economy than performance. They are too high. Several very interesting threads have been posted, with varying opinions. Check the archives. You can always try the factory pressures, then adjust them 1-2 lbs at a time to see which one fits you, the track, the weather, best. I use 32F/38R cold on P-Zero Assims.
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica"> I have some track experience with C2's - anything I should be doing different - or expect to be different with the C4S?
</font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Several prior threads on this as well. My impression from the threads: The differences are probably only noticeable at the edge of performance, a place where you do not need to be in DE. Of course, since I own one, the C4S willl beat the C2
.
Actually, since you have track experience on a C2 and soon will have the same on a C4S, you might provide us with some enlightening impreessions.
</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by hgmobile:
<strong>I am the lucky owner of a new 02 C4S. I have not had any real opportunity yet to drive it aggressively. My impression is that it understeers more than a c2.
Two questions: Cold tire pressures for a track day - should I be adding 3-5 lbs of extra air over and above recommended on the Conti Sport 2's?
Thanks in advance.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Start with LESS air pressure COLD, not more. You'll probably want the track hot tire pressures to be around 38 front and 40 rear with the stock tires, perhaps a tad higher. As Palting suggested, you'll have to do some experimentation once at the track. I'd try starting out with cold pressures at 33 and 35 front and rear, respectively, and see how it feels once the tires get up to their hot operating temps.
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