[torsen] RE: RS2 turbocharger

[JShadzi at aol.com]

You know, interesting to note in this conversation wrt flywheel weight, in the recent (this month) EC article about lightened flywheels, they found that the difference was dramatic in first gear with a 7lb lighter flywheel, a 14% increase in useable power, in 2nd gear it dropped to abut 3%, by 3rd gear there was no change, and eihter in 4 or 5th.

So, if this is universally true, Scott's argument is only valid in 1st gear at best, by 2nd and 3rd gear, flywheel weights are negligible to acceleration times regardless.

Javad

In a message dated Thu, 13 Jun 2002  6:31:37 PM Eastern Daylight Time, David Eaton <deaton at tranzrail.co.nz> writes:

>i used the 6th gear times for illustration, as the engine speeds are slower
>and more illustrative of the lethargy of the rs2, which was the discussion
>point.
>
>however, if you look at the 3rd gear times, where the engine speeds are
>inevitably faster, the effects are the same, i.e. k24 beats rs2, but the
>deltas are different.  particularly interesting in these data are the
>performance of the 2 cars in the 2,700 to 3,800 rpm range, where most would
>assume that the rs2 would have ascendancy.  not according to these figures -
>the k24 is still comprehensively faster.  this, once again, ime, is
>indicative of the lethargy of the rs2 below about 3,200rpm.
>
>mph     rs2    s2     rpm range        outcome
>20-40  5.7    3.8  (1515 to 3030)  rs2 22% slower
>30-50  3.2    2.9  (2723 to 3788)  rs2 27% slower
>40-60  2.8    2.9  (3030 to 4545)  rs2 14% slower
>50-70  3.6    3.8  (3788 to 5303)  rs2  5% faster
>