eBay. Look for Autometer.

Or you can be like that guy on Pimp My Ride who had his tach drawn on a piece of paper...

 

Rev til the check engine light comes on.

Actually, it won't let you do any damage to it... rev limiter. Just find the spots that feel like you get the most out of the engine. Remember, Hondas need revs to make power.

Also, no need to worry about doing 80 in 4th. You could prolly do that in 3rd and still be in the rev limit, you'd be way at the top, but prolly still within the limits. My 99 EX redlines at 90 in 3rd.

 

^yup. I believe 85 is the cutoff in 3rd gear to utilize the most power

 

Hmm yeah but the VP and DX have a smaller engine than the EX right? Wouldn't the line be lower on it?

 

Not necessarily, could redline the same but not at the same speed.

 

i had this same problem with a neon i owned, i was going to go drag race it, and didnt have a tach, so i hit the rev limiter in first second and third, then rememberd the speed. PS, it ran a 10.22 in the 8th with a throtle body, exhaust, intake. SOHC 4 door