[s-cars] Why audi I5 started as 2.1 liters - AudisportHistorical Trivia

[James Bufkin]

You and I just disagree on this.
Ned's turbo from a K26 with a 3.4" 72 trim wheel is fine and dandy.  I 
definately call in question in relevance when discussing what audisport 
used on their 20V cars.    Are you saying they should have used Ned's K26 
Hybrid?   Has Ned's turbo run the 1000 Lakes Rally or the Dallas Grand 
Prix?  I'd also question using a compressor that large on a K26 
hotside.   Read Mihnea's comments about EGTs, backpressure on K26 
hotsides.    His numbers show that the Rs2 is falling off the map at higher 
RPMS and higher Boost pressures.   So sticking a larger compressor on there 
solves all that?  It might for a single dyno run or a drive around town, 
and that makes it percieved as a good solution.   20 minute sessions has 
given everyone the luxury of not pushing their cars for 2 hours 
straight.  We have no real idea what running an RS2 at 6000 rpms and 2.6 PR 
for 2 hours will do it.  I suspect VERY bad things.

I'll stick by my comments.  You fail to persuade.  You cite examples of HP 
restricted racing like Group A or mention 350cHP (near stock RS2).  I've 
said before that the RS2 is fine for street use.  You're now claiming the 
RS2 is good for racing as long as its HP restricted.   That doesn't really 
make any sense to me with regards to what we've been discussing, but 
okay.  I'll concede that the RS2 is a fine choice is the sanctioning body 
limits HP and/or boost.   My car had a 40mm intake restrictor and an RS2 
Comp turbo so I'd 100% agree with that.    So what turbo would you use if 
the sanctioning body doesn't limit boost or HP?  I'm guessing your answer 
would be RS2, and I still don't see the logic in it.  I'm citing Group B, 
IMSA and TransAM where all HP that could be made could be used.   Those 
builds did not use a K26.

Maybe we can agree on this and call it a day:
RS2=better suited for heavy car, wide gears, Street use, high torque, Easy 
to drive
K27=better suited for lighter car, narrow gears, track use, high HP, Hard 
to drive

Which one of the above things sounds like an Audisport car and which one 
sounds like an S-car.
To me, this thread is definately more about Audisport and nothing to do 
with S-cars so I can't see any point in continuing it.

James