MPH per 1k RPM

[danhock]

I know this is a little obscure but.........

How many MPH do you get per 1000rpm in top gear?

Mines does exactly 20mph/1k rpm

Which means its geared to do 130mph!!! (6500rpm red red line)

[richy]

I get about the same.  At 80mph I think I'm at about 4000rpm.  The revvo ends at over 7000.  140mph?

[jte]

100mph is about 4,200rpm so with the redline at 6,500 can i go 154mph?   I doubt it!

[AdamB]

You'll find it fairly hard to redline most cars in 5th (or 6th) gear, so the theoretical top speed are a nice dream. However, on my cab, the smaller wheels help quite a bit and I had mine pushing 6000rpm in 5th gear, giving me a speed of 108 mph on the GPS, and an indicated 120+ on the speedo.

[danhock]

I've hit 6000rpm before in top..... a little scary in the cab!!!

I had a car once (to embarassed to say what) that was theorectically geared to 160mph and it was a 1.3!!!

Alot of cars have an Economy style top gear, the Chevy Corvette i read once had a top gear geared to 306mph!!! Just a way to get around emissions etc...
,

[richy]

I like the top gear in my car cos when you're going 75-85mph, you can put your foot down in 5th and still get good acceleration (and plenty of revs to spare!)

[jte]

giving me a speed of 108 mph on the GPS, and an indicated 120+ on the speedo.

I know speedos are not totally accurate but is this a normal sort of error or does your wheel size affect the accuracy more?

Altough i suppose this is only about 10% error.

[Gambit]

i had mine sitting at 5.5k and it was indicating 125mph on the speedo

[AdamB]

giving me a speed of 108 mph on the GPS, and an indicated 120+ on the speedo.

I know speedos are not totally accurate but is this a normal sort of error or does your wheel size affect the accuracy more?

Altough i suppose this is only about 10% error.

I have little Euro wheels and low profile tyres fitted, this makes the rolling radius much smaller, and hence a 13% error on the speedo! also means I am clocking up more miles than I am actually doing, but on a plus side it has improved the performance.

[Overseer]

so how does this work then?

after reading this post i checked it out...

on the way home i put it in 5th, and at 1000 revs i was doing about 23. my car redlines at 7000

23 *7 is 161.. ?   (20*7 is 140)
 


fastest my car will go is 137..