Your top speed?

[BYprodriver]

Originally Posted by LAP1DOUG

Don't trust all those speedometers guys. My speedometer says 140 down the backstretch at Road Atlanta, but Aim GPS says only 130.

Are your rear tires shorter than stock ?

[xzyfsk]

137 in my Boxster a couple days after i bought it.

[Cunningr]

Originally Posted by BYprodriver

Are your rear tires shorter than stock ?

I have stock tires and rims that match the documentation on the car, however probably some variances in speedo readings and then add in the BS factor adds at 15 MPH

So divide speedo reading by the BS factor you now have a ball park estimate of your fastest speed!

[JBauer]

I've never driven fast enough for my spoiler to raise. 🙄

[Cunningr]

Originally Posted by JBauer

I've never driven fast enough for my spoiler to raise. 🙄

That's why there is a button to raise it, makes you look fast!