986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post

fatmike · 04-12-2008, 07:30 PM

I love my Boxster -- but I never know how fast I'm going. I don't trust the digital speed read-out, other threads have indicated that this can be off by a lot. The speedometer guage is just worthless, you can't tell if your going 35 MPH or 50 by a glance.

This makes me wonder:

Does anyone regulary use the tachometer to know your speed? I drive a 6 speed (its an '02 S) and use the stock 18" wheels. I know that there are some variables, but I think this method should be as accurate as any.

In my old BMW, the tachometer was great for telling speed because 4k RPM in 2nd gear was 40 MPH. 4000 RPM in 4th gear was double (80 MPH). I am very aware of my engine RPM & I am also able to "read" the tachometer quickly and accurately at a glance. I just haven't been able to correlate RPM, gear & speed yet in the Boxster. Is anyone doing this? Any hints or tricks?

04-12-2008, 07:30 PM	#1
fatmike Registered User Join Date: Aug 2007 Location: New Jersey Posts: 691	RPM/Gear & actual road speed I love my Boxster -- but I never know how fast I'm going. I don't trust the digital speed read-out, other threads have indicated that this can be off by a lot. The speedometer guage is just worthless, you can't tell if your going 35 MPH or 50 by a glance. This makes me wonder: Does anyone regulary use the tachometer to know your speed? I drive a 6 speed (its an '02 S) and use the stock 18" wheels. I know that there are some variables, but I think this method should be as accurate as any. In my old BMW, the tachometer was great for telling speed because 4k RPM in 2nd gear was 40 MPH. 4000 RPM in 4th gear was double (80 MPH). I am very aware of my engine RPM & I am also able to "read" the tachometer quickly and accurately at a glance. I just haven't been able to correlate RPM, gear & speed yet in the Boxster. Is anyone doing this? Any hints or tricks? __________________ SOLD - 2002 Boxster S - PSM, Litronics, De-ambered, Bird Bike Rack, Hardtop, RMS leak... Last edited by fatmike; 04-12-2008 at 07:32 PM.