rpm at highway speed

[86grandnat.]

I am just curious to see what people's rpm's are at @ 100km/h, 62mph? Stock setup (tire diameter, gear ratio, etc.)

 

[GNRick]

Around 1800 rpm.

 

[86grandnat.]

thats it, mine is around 1950 on my scanmaster. why is it so much higher then yours.

 

[GNRick]

Well, my trans was rebuilt so that might have something to do with it. Sounds like ours are pretty close though.

 

[86grandnat.]

I have 265/50 15's on my car. Are these tires smaller diameter then stock. They seem to "balloon" out quite a bit making them look smaller. If so, what kind of difference would this make on my speedo and rpm's?