I'd like to note that Porsche speedometers, if used with the proper diameter 
tires, are notoriously "slow", as in they will read
150 but you are really going slightly faster than that.  That also goes for 
their acceleration and braking times and speeds.
Porsches are even better than they say!  Just go thru some back issues of nealy 
any car magazine that tests them and you will see
what I mean.
Later,
Clayton


Date: Tue, 25 Jan 2000 19:39:29 -0800
From: "Dave M." <>
Subject: Top speeds - reality check bounced

Just  a quick note on the ultrafast 944. Since no mention was made of radar
guns or stopwatches, I'm going to assume that 180mph reading was from the
speedometer. And, I hate to break this news to y'all, but speedos are
notoriously inaccurate- especially over ~100mph. Both my GLI's read 5mph
high @ only 75mph (says 75, actual 70) and that's with stock wheels & tire
sizes. At 150 (if it would get there)  the error would be at LEAST 10mph.

My bike does the same thing. I got my bike flat out in 5th gear once, and
the speedo showed 165mph. I know that's not accurate, since the bike's true
top speed in 6th gear is ~167 (from bike mags with radar guns) and the top
of 5th is mathematically ~150ish. Anyway, if the 944 speedo said 180 I'd
suspect something more like 160 in reality, perhaps lower; unless this was
a really, REALLY pumped up 944. I always take these numbers with a big ol'
grain of salt unless the claim is backed up with some serious evidence
(radar guns, timing lights, etc).

BTW, to the lister who was skeptical: Car & Driver tested a 99 Camaro SS
convertible and it went 160mph, the C-5 Vette hit 171. The GTI & GLX VR6
both did ~134. Electronically limited, I hope. One last bike tidbit (sorry
can't resist!) is about the Suzuki Hayabusa GSX-1300R. It has been radar
gunned, bone stock, at 194-196mph by several different mags. However, they
all show 210-220mph on the speedo when flat out. This thing has 165hp at
the wheel, and runs high 9's at mid-140's in the quarter. Corners pretty
good too for a big bike. :-)

A2 content, to avoid getting banned for off-topic banter: Is there any way
to correct the A2's speedo error? It's really annoying! Will a correction
doohickey thing go between the transaxle and the speedo cable?


- -Dave 2
1990.5 GLI
1991 GLI

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