Hello might be a dumb question but is there anyway to increase the amount of time before each gear is ready to shift? When I say that I mean can I make the 5AT automatic transmission have longer gearing? Car got tuned and barely hits 165 with just an exhaust and intake but was wanting to do some fuel upgrades like ethanol and maybe the purge kit I have. would just cost more money in fab for purge kit and time for fuel pump lines return fuel systems etc. let me know!

 

You most likely have 3.35 gears so to get more MPH, you'll need a lower gear ratio. I'm not sure who makes lower gear ratio gears for G35..