[s-cars] With all of the hybrid and other turbo options, is the
seiche at shadetreesoftware.com
Sat Jun 11 21:28:56 EDT 2005
Well, Porsche apparently thought that clipping the the turbine was a good idea. It is already done on the RS2. One of the mysteries of the RS2 turbo revealed (hah!)... :)
In a message dated 6/11/2005 2:09:34 PM Mountain Standard Time,
Another option is to clip the turbin wheel on the RS2 turbo to give it
better flow up top. I did this on my hybrid K27 #6 and it performs like a #8 at
the top end and still spools up quick like a #6.
The turbine wheel isn't the problem... it's the compressor. It is only
capable of flowing about 34lbs/minute before it's off its map. My GT30R's
turbine wheel is only slightly larger than the RS2's, and has no problem flowing to
8k rpm, and making 100 more hp (same dyno, same correction, etc, etc...).
This is due to the fact that the compressor can move 50lbs/minute while still
within the 72% efficiency range.
By Corky's "rule of thumb" this means you're off the RS2 compressor map at
about 340 crank hp. Messing with the turbine wheel will effectively buy you
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