Manifold

... though I do wonder why there's a difference.

ipse dixit

Reliability.

Less chance of going "kaboom"

That said, I love the 9k redline.

Sort of like eating Fugu.

TRAKCAR

Its just good at everything on asphalt except transporting rear passengers

CHADW

Keep in mind there is a difference between redline and optimal shift rpm. You do not want to shift a GT3 at 9000 rpm, especially in higher gears.

TRAKCAR

I mostly short shift the RS as I did with all previous GT3's.
Doesn't hurt lap time, maybe improves even?

Manifold

I remember reading a study on this, and the finding was that, for most sports cars, you want to shift a little below redline in order to maximize acceleration.

I short shift the GT3 a lot, simply because I still haven't wrapped my head around 9K redline. May need to try putting it in auto to see how that affects lap time.

TRAKCAR

Auto = motor kill mode.
I can't imagine holding some of the corners near redline balancing the car..

Tre

Perhaps not 100% representative of every test result, but here's my 1/4 & 1/2 mile results from the Heavens Landing portion of the Spring '16 Smokies event.

Banango

That sent my Red Bull out my nose. Well done.

sgroer

Oops. Read half mile. Lol!!