and that's why some of us use a COBB AP.Anyone else feel that revving the car past about 5k seems pointless?
I find if i'm in say 3rd and floor it at about 2k you get lovely acceleration till about 5k then just feels flat.
äääääeeemmmmmmm,Accessport will cure thatand that's why some of us use a COBB AP.
tbh,i think Nissan expected too much abuse from us europeans and just made the mapping far too safe...thats the reason the GTR doesn´t do 310km/h...So what is actually happening at this RPM, does the boost flatten off or something? and a Cobb remap continues to increase it?
You'll want to shift so that your current gear and the next gear get the most area under the dyno.Heres a question , when is the best time to shift to maximize acceleration ?
Peak power ?
Peak torque ?
Redline ?
Somewhere else ?
But logically acceleration is generated as a result of power and not torque (if we need to get to 100mph then we need to generate the kinetic energy required from the engine, and power is energy per unit time), so for maximum acceleration one would need as much bhp as possible for as long a period in the rev range as possible, which would most likely be by staying in gear through peak bhp. If someone has a dyno sheet to dissect and some shift data then we could work it out exactly.peak BHP is still up around 6400rpm but torque drop dramatcally after 5300rpm.
I think this sums it up nicely imho (assuming dyno = power plot graph).You'll want to shift so that your current gear and the next gear get the most area under the dyno....
Interesting this as best terminal was acheived short shifting??? Cant wait for dry track as suspect it was all due to lack of traction nowFrom your graphs John you want to change quite high, especially in the lower gears (subject to traction as you mention). Usually you want to change after peak power so that when you drop back in your are just below peak power = highest average power.