i don't have the shift points memorized in d but i can tell you for sure i was shifting up to second and up to third at higher rpm than the computer would in d. it just felt different and sounded different. i've driven in d thousands of times so its not hard to be able to tell the difference. the car would kind of top out at about 20-25 in first and you would have to shift to go faster. second was about 35 or 40 or so before it had to be shifted. it seemed that it responded a little quicker when i moved the shifter myself. maybe its just because more things are going on at once at it felt that way (because i was watching the road and the rpms and concentrating on pushing the shifter forward)Originally Posted by Seachicken
if you get on your 10 speed and ride as fast as you can in its lowest gear you will top out at a certain speed. your legs won't be able to spin fast enough or pump any harder. change the gear and you can go even faster and you're legs won't have to pump as hard or rotate as much. but if you start in third or fourth gear on your ten speed you won't start out as fast. we agree there, no?
so taking that same logic and expounding on a point made earlier about the trans not shifting when wot, i don't see how that is possible. the crank cannot spin fast enough to get the car up to say, 50, in first gear without changing to a larger gear. it has a top out point. and even if it could, it wouldn't be optimal. so if you wot from stop to 100mph the transmission shifts while you are doing it. it isn't physically possible to spin that small gear that fast. i mean, my car didn't want to seem to want to go faster than 25 in first gear. i shifted at what felt to be its peak power and acceleration. i tested that a couple times and pushed the rpms higher and it actually felt like i was losing power.
and how the computer shifts the car....i'm sure from the factory they give it shift points that are within a safe zone and they aren't going to give it parameters that are going to push its limits every time you get on the gas or wot. isn't there a bit of lag when the computer shifts the car? i don't see how pushing the gear shift one notch is going to be so much incredibly slower than the computer doing it for you.
i'm not understanding the relevance of the clutch, though, in this application. it is a shifting mechanism as well. i would think not needing a clutch would be a faster way to shift.
i'm just learning as i go here so please forgive me for trying to understand.
in a manual, you want to get the rpms as high as possible in the lowest gear possible until you hit that optimal sweet spot before up shifting. there is a sweet spot you can feel when you shift. it may not be what is best for the longevity of the car, but is best for acceleration. why would it be any different in an automatic transmission if you control the actual shift points? the only difference is there is no clutch--which seems to me to be a shortcut and should take less time.
don't people get their pcm tuned to change shift points? couldn't you just shift it manually and get the same effect? that is if it doesn't damage the transmission in some way.
