I havent driven the S since fall (snow sux) but if i remember correctly when your at about 60-70MPH the RPM are around 5k right? MY00

Is there any way to change the 6th gear so that the RPMs drop much lower? It is nice not to have to shift to pass someone on the highway but its NICER to save $ and get better MPGs.

My friends corvette can be around 70MPH and he is sitting at 2K

This would also help with drone

Thought, comments?

 

I would also like to know about this.

 

RPM's don't really matter in MPG....

Your friends corvette also isn't getting the mpg you're getting.

Buying an exhaust that doesn't drone; helps with drone.

 

You can do an Ap2 transmission swap, it makes the car accelerate better in 1-4th gear and lowers your 6th gear. This is the easiest solution I can think of anything else I think would cost alot.

 

I have a MY03 and at 80mph, I wanna say I'm at no more than 4500 rpm, so I don't think you should be that high.

 

A corvette has twice as many cylinders too, so the combustions per minute is twice as high as a 4 cylinder. However, they do get better MPG than an S2000 due to improved aerodynamcs.

If you get a numerically lower final drive (big bucks) or an AP2 transmission, you'll definitely get better highway MPG. However, depending on the exhaust you have, drone could be better or worse. Every exhaust drones, but the RPM that they drone at varies from one to another.

 

Like I said I havent driven the car in months, and I would bring it out today...BUT ITS SNOWING AGAIN!!!!!!!!!!! Stop already please

How do you figure RPMs dont effect MPG?

AP2 tranny bolts right up to a AP1?
Simple to do?

Whats the difference in RPMs @ 70...do you think?

 

Exhaust is stock right now

 

If this is about mpg's then this thread is worthless. The money spent on actual replacement gear plus installation would be way more than you'd ever spend on gas by lowering 6th gear rpms 500, 1000, 1500 rpms.

If this is about lowering 6th gear rpms to make highway driving more tolerable your logic is sound.

And to Whiteflash, Vettes can easily do 30mpg on the highway all while loping around at ridiculously low rpms for the speed.

 

5k at 60-70 is TOO HIGH..more like 3500-4xxxx