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      07-14-2011, 01:16 PM   #28
persian54
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Drives: SL550. Prev: E93 M3/335i/Z435i
Join Date: Jun 2009
Location: The Valley, SoCal

Posts: 15,787
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FWIW, I my speedo hit over 180mph last weekend....I wasn't staring at it but I believe 185 was the max I hit

Not GPS tracked, so I know it's not true ground speed. But it was still really freaking fast.

I was also on a slight decline, which I'm confident it helped.

I didn't hold it for long at 180+, but the car was very planted at the 175mph that I kept for a good couple minutes.

Again, every speed I listed is speedo speed, so you want about 7% correction for true ground speed. Just saying.

I have an AA Xpipe with an OE Tune with the limiter removed.
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