[paintme205]

I have seen some people mention their is an ideal RPM to cruise on the highway based on the torque curve of the engine.

Others seem to say the lower the RPM, typically the better.

I'm cruising around 2800-3000 RPM's now in my festiva at 65-75 MPH.

Peak torque is at 3000 RPM.

I'm considering Taller tires to get RPM's closer to 2k while cruising.

Good idea or bad idea?

It looks like changing to 155/80r13 tires in front would lower rpms 7% and also reduce tire width by .4 inches compared to my factory festiva wheels. If I lower the car a 1/2 inch, wind resistance / aero should remain close to the same.

If I got super motivated, I could try and find some LRR tires.