I didn't even find out this was an option until after I bought my car. But I am seriously thinking about changing to these gears when they are released on American muscle.
I've never seen above 24mpg but I do mostly city driving with occasional highway driving. I usually only average 22mpg anyway. It's not my daily driver so I can deal with losing some mpg.
I'm guessing I'll see a 1-2 mpg hit from the 3.55 gears. I'm ok with that knowing the performance increase. Much later in the car's life, I want to swap in the Torsen diff. Can't do that with 3.15 gears, only 3.31 and up.
I think the general consensus was a 2mpg hit with 3.55 gears on the v6 when my mpg thread was still active. This was in highway driving though with city driving actually seeing 1-2mpg improvement.
You'd be adding weight and giving up all seasons for summer only tires.
I think the weight would be worth it for my purposes and I plan to have a dedicated winter set of tires anyway, so I'd actually prefer it to be on summers during the warm months. I will autocross the car 4-5 times a year. This was the main reason it was very hard to decide between an EB perf pack and the V6. Because it will also be my daily driver, the V6 was more enjoyable (to me) most of the time.
How do you expect the V6 engine response to differ from the eB, assuming the 3.55 and a manual, and 19" tires?
Much more linear power delivery, continuing to build as the revs climb. A little less punch out of a corner (turbo engines are hard to match here), but overall response to input will be better as it's an NA engine. I'll probably stick with 18" to be honest. They're lighter, ride better and there are more streetable autocross tires available in 18" vs 19", if I decide to do that. 19" looks a little better and will tend to have sharper turn-in response, but it will depend greatly on the tire. Something like a 18" Bridgestone RE-11 won't be lacking in any way.
They felt identical to me at 2k rpm+. There isn't any turbo lag in the EB that I noticed and the V6 doesn't have the low end torque problem it used to have, either.
