Quote:
Originally Posted by Dzmitry
I totally missed over the fact that you're referring to AT. With different gear ratios, the data I listed is incorrect, as I was referencing MT ratios. Often, with AT on this platform, for better acceleration, you are better off going with a higher FD ratio - such as 4.56 and up. This is up to you of course, as it will cost you mpg and comfort of drivability with higher RPM in 6th gear on highway cruising. If this is something you don't care about, you will certainly benefit from going with a higher FD. But then again, you need to consider your current grip levels, particularly in the early gears - which I would think aren't as heavily affected in an AT compared to an MT.
So if I understand your question correctly, a higher FD like I mentioned in your AT will make 5th gear more "useable" as it will have more torque.
EDIT: Disregard my conclusion. You want a higher top speed in 5th based on your OP, then you want a lower FD.
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Hmmm if you drive mt try to imagine going from 4th straight to sixth gear, that what I meant by 5th gear being sluggish and almost unusable even if i'm boosted. It's like for example I can reach 130mph in 4th gear that probably as high as i'm going to get as the moment I shift into 5th it just bogs down due to the long gears. So I just thought maybe a higher final drive would act like a shorter 5th gear or it would be better to go lower so I can make the most out of 4th gear totally disregarding 5th.
I know most people here don't really care about top speed but I was just genuinely curious if you could adjust that as I live in an area where such speeds are achievable legally (for the most part) Hope my post doesn't confuse others sorry.