Good morning, North America Peoples! Thanks for the replies
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Originally Posted by nextcar
I went 4.56 in my daily driver... but if I had it to do over again I just may have gone 4.67. I wanted quiet so I used the Toyota set (same as Cusco) - helical cut and as far as I can tell no noticeable increase in gear noise over stock.
I mention this because I did not see noise listed as a concern for you. I like my 4.56 gears, a definite improvement, just perhaps a bit too mild.
I would be a little hesitant of 4.88 on a daily that saw lots of highway miles.
Tough choice, and the only way to know for sure is to drive them. As far as the freeway noise and gas milage goes, you can simulate that by just not shifting into the higher gears and running the approximate RPM of the final drives you are interested in on the freeway.
Good luck!
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Yeah, noise isn't much of an issue. I'm pretty sure a revving engine and an aftermarket exhaust would drown it out... xD
Subjectivities aside, if 4.56 is only a bit mild, 4.67 might be my best bet.
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From your description of how you drive your car ........ I'd suggest you leave the FD alone .....
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Pfft! Where's the fun in that?! xD I wanna reduce top speed and gain low- and mid-level torque. I just wish someone had a use-guide for FDs, lol.
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4.56 or 4.67. 4.88 personally is a bit too impractical for a manual, but since you seem to be more interested in performance I'd say go with 4.67. Pair it with headers and a tune and you'll get pretty close to the feel of a 4.88 without the impracticality
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Oh yeah, uel headers and a tune are on the list. I want those rumblies, and the torque dip will be poofded, haha.
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BTW, fuel economy shouldn't take THAT much of a hit with different FD. Yes, more rpms per speed, but with less power/gas/pedal pushed needed due higher gearing. Mechanical losses increase (of engine and gearbox), but they are just part of all the forces engine power is used to counter when car is moving. For example air drag stays same.
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Yeah, those maths were just a general estimation. I didn't take into account all the other little factors. So, it would probably be more like 3-4 mpg.
So, it looks like 4.67 would work best for me. Coolbeans. Thanks again for your replies