[s-cars] RS2 Upgrade Questions

[Keith Maddock]

 Rich Letsinger <ricoletsinger at yahoo.com> wrote:
> > > 3.     What changes should be done to the head
> > > besides rebuilding? A new exhaust camshaft?
> > 
> > Since you have the head off, and if you have the
> > $$$, then a RS2 exhaust cam will restore some of the
> > lost bottom end.
> 
> I believe this is backwards.  From my understanding, a
> "hotter" exhaust cam helps high RPM flow while
> sacraficing low RPM efficiency.  So going with an RS2
> cam (or a 7A cam for more of a change) will make more
> power at the top end but will raise your boost
> threshold and hurt low RPM torque.

I will agree with Rich and Dave on this.

I can state from my personal experience with my 93 S4, my boost
threshold went UP (approx 300-400rpm) when I installed the RS2
camshaft, which was extremely dissapointing as I was hoping for a
decrease.

Just my "sample size = 1" statistic...

Cheers,
Keith