speedo off

man i have to figure out how far my speedo is, i drove her a good bit today and shes turning 2800 rpms to stay up with traffic. i would like to know how fast im going before a polite illinois state police officer hands me a coupon with the speed written down on it. the po put a 3;08 in her. also i pick up a couple hundred rpm when i come off a highway run. any one want to buy a real nice van

Have a buddy go for a ride for a few blocks with you. You following him!

Bring a "sharpie" marker with you and put a little tic-mark at each speed on the glass of your speedo. This way you can clean it later...

1st block= 25 mph
2nd block= 35 mph
3rd= 45 mph
4th= 55 mph

Then get on the highway for a short run at highway speed.

Takes about a half an hour but sure beats the cost of a city/ state patrol's official test!

Dan

Any body with a hand held GPS or some cell phones will display your ground speed.

M1d

My speedo is way off also, this is kind of guessing but when the speedo is at 70 I think I'm about 55 mph,, some people pass me ( real hard to let them do that) and some don't, at 75mph they stay behind me. Brings me to another Q, do you have to change out the entire tail shaft and housing to get the right (or closer) speedo drive gear combo ona 700r4 ?

Wow that seems easy enough ! Thanks ,, added to my parts list.

Wow Don. I don't need this right now but that's really cool!!!!

Maybe after I make the 327/200-4R conversion? Bookmarked it for future use.

Dan