The tach is not as accurate as the speedo can be if properly calibrated. That chart is ONLY meant to be close so in the event you lose the speedo you can still approximate your speed. Be sure to use the correct chart. If you have a 5-speed you cannot use the automatic chart and vice-versa. I keep a laminated chart laying on my binnacle just in case so don't tear up you chart, you never know when it will come in handy. Now that your speedometer is working (and hopefully accurate) you can create your own chart. Of course if your clutch is slipping at all then you can be way off. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "cruznmd" <racuti1@xxxx> wrote: > I finally purchased a replacement angle-drive and now have a working > speedometer. > > Either it's out of calibration or I have really been speeding. > > Like many others, I've been driving with the RPM/MPH conversion chart > strapped to my steering wheel and Mike Cohee and I had the "tearing > up" ceremony during the test drive. My question is this: > > The chart reads 2500 RPM=65 MPH. Yet I hit 65 at 2350/2400 RPM, and > almost 70 MPH at 2500 RPM. Is it at all accurate to compare the > speedometer to this conversion chart? I'm just trying to figure out > how far off I am. > > Lastly, for those who were following my "Great TAB Disaster", it took > a lot of heat, but the snapped bolt was finally extracted from the > trailing arm, so I'm back on the road. I've only been online for 15 > months but I see new owners all the time. CHECK YOUR TRAILING ARM > BOLTS! It was dangerous, violent and scary when I snapped mine. I > didn't even hit anything and I still twisted my back. > > > Rich A. > #5335 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/