RPM when cruising on the highway

[Black Betty]

For those that are so concerned with MPG there's the option of changing the rear end gear to get better mileage if that's important to you.

[jdm_inspire]

Originally Posted by gurneyeagle

On the one extended trip I've taken in the car, the best I ever did was maybe 24 mpg at 80 mph. Coming from an Acura TL 5 AT that easily got 32 - 34 mpg at 80 mph on the same run, I was a bit surprised; not disappointed, just surprised. My G isn't that much faster than the TL in every day driving.

Don't get me wrong, I love my car. I just wish it turned fewer mph on the highway and got a bit better mileage.

I had a '02 TL-S before this car ... and I would regularly hit 30mpg on the highway (~70 mph) but never 32-34 mpg. Perhaps you were driving a 3rd gen TL ... ?

And I would definitely agree ... I miss my old car a bit ... but I am definitely very glad I got the G.

[gurneyeagle]

Originally Posted by jdm_inspire

I had a '02 TL-S before this car ... and I would regularly hit 30mpg on the highway (~70 mph) but never 32-34 mpg. Perhaps you were driving a 3rd gen TL ... ?

And I would definitely agree ... I miss my old car a bit ... but I am definitely very glad I got the G.

Sorry, should have noted it was an '05. Yeah, it was a good car, but the G is exponentially better.

[Mr_Ryte]

Originally Posted by Black Betty

For those that are so concerned with MPG there's the option of changing the rear end gear to get better mileage if that's important to you.

I've always wondered about this mod....
When the final drive is changed, does the ECU need to be reprogrammed as well due to the different gearing? Just curious....

[G37Sam]

I don't think there would be a reason for that (that I could think of at least)

[bschurr]

Originally Posted by Black Betty

You are dead on. That's where the 6MT should be. It may be a bit higher revving than you are used to, hence the HR part of the VQHR37 engine designation.

Well - the Convertible 6MT is apparently geared a bit differently
At 80 MPH the tachometer was at 3250
At 3000 RPM car was going 77 MPH

Just for comparison...

[Black Betty]

Originally Posted by bschurr

Well - the Convertible 6MT is apparently geared a bit differently
At 80 MPH the tachometer was at 3250
At 3000 RPM car was going 77 MPH

Just for comparison...

Is it geared differently? What size are the wheels/tires?

[js3350z]

removed, way cleaner visual attached below

[js3350z]

here is something I threw together based on vehix.com specs.... enjoy and 7AT ftw on highway mileage, 6mt still more fun though

[Black Betty]

The different rear end gear ratio explains why it turns more RPM at a given speed. I'm just surprised the vert has a different rear end gear.

[js3350z]

I wonder if the verts are quicker or just compensating for the extra weight (probably the latter) and the big numerical difference between 1st and 2nd is the culprit of everybody's first->second shift issues.... and anyone who has not tried taking out the "helper" spring on the clutch pedal should give it a try, it is so much easier to get smooth starts and clean shifts now

**it feels very weird, and way stiffer at first but it has helped me tremendously in smoothness**

[G37Sam]

That's a new one, but I'm guessing they did that to the rear end to compensate for the added weight since the 0-60 numbers are what concern the majority of buyers out there. They don't want people not buying the vert because it felt slower.

[Black Betty]

So who's going to be the first to swap out a rear end gear from the vert into the coupe?

[bschurr]

Originally Posted by Black Betty

So who's going to be the first to swap out a rear end gear from the vert into the coupe?

Since the Vert has many of the new features of the soon to arrive 2010 Gs, perhaps a different final drive gear is already part of the 2010 coupe offerings? hmmmmm