Holden1989 Posted February 23, 2010 Share Posted February 23, 2010 I was taking a look at this thread http://www.mkivsupra.net/vbb/showthread.php?t=154393 But my maths is shocking Was just wondering what the maximum RPM is when a gear has reached its maximum output? For example when on a drag strip, at what RPM should i be changing at when going up a gear? The gearbox/supra in question is a 5speed NA - and yes, i am well aware there is nothing i can do about not having a set of turbos at my leisure It would just be handy to know - not going to rev the nuts of it knowing that there is nothing more it can give.......... TIA Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted February 23, 2010 Share Posted February 23, 2010 Ideally you need a dyno to find out when peak power and peak torque are produced, and go from there. If its stock, find out what rpm they are normally developed at and go with that, the only expeption being that if you are about to cross the line, and are still accelerating you may as well not change I think. Not actually put the theory into practice myself Quote Link to comment Share on other sites More sharing options...
MrRalphMan Posted February 24, 2010 Share Posted February 24, 2010 I knew this info had been posted before, took me a little time to find it but have a look here. Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 24, 2010 Share Posted February 24, 2010 Alas that's for a 6spd TT, and not a 5spd NA Quote Link to comment Share on other sites More sharing options...
Thorin Posted February 24, 2010 Share Posted February 24, 2010 NA, just rev it to the redline and change. Quote Link to comment Share on other sites More sharing options...
Nic Posted February 24, 2010 Share Posted February 24, 2010 Ideally you need a dyno to find out when peak power and peak torque are produced, and go from there. If its stock, find out what rpm they are normally developed at and go with that, the only expeption being that if you are about to cross the line, and are still accelerating you may as well not change The rpm the next gear is in when changed will also need to be factored in. Quote Link to comment Share on other sites More sharing options...
MrRalphMan Posted February 24, 2010 Share Posted February 24, 2010 Alas that's for a 6spd TT, and not a 5spd NA Oops.. Quote Link to comment Share on other sites More sharing options...
Holden1989 Posted February 24, 2010 Author Share Posted February 24, 2010 NA, just rev it to the redline and change. Whats the point in redlining it though? Surely if your not going to get anymore power out of the gears then whats the point in wasting fuel and 'proberly' fcuking up the engine Meh Il stick to my 4.5rpm in 'spirited' situations Quote Link to comment Share on other sites More sharing options...
Kirk Posted February 24, 2010 Share Posted February 24, 2010 Your shifting at 4.5rpm when the timing advances and the car starts to actualy move? Quote Link to comment Share on other sites More sharing options...
JamieP Posted February 24, 2010 Share Posted February 24, 2010 Whats the point in redlining it though? Surely if your not going to get anymore power out of the gears then whats the point in wasting fuel and 'proberly' fcuking up the engine Meh Il stick to my 4.5rpm in 'spirited' situations If you change gear just when it makes most power then you will out of the powerband at the next gear, thorin is right, redline it so you dont dip out of the best power. Quote Link to comment Share on other sites More sharing options...
Ian C Posted February 24, 2010 Share Posted February 24, 2010 I think you'd have trouble breaking a Supra NA engine just by using all the revs now and again, considering it's the same block and rotating assembly as the TT, bar the pistons. Murder it through the gears Quote Link to comment Share on other sites More sharing options...
devan Posted February 24, 2010 Share Posted February 24, 2010 I usually change gear at red line, just before the limiter kicks in. Obviously only when i want to go fast, everyday driving is 3k. Quote Link to comment Share on other sites More sharing options...
RobSheffield Posted February 24, 2010 Share Posted February 24, 2010 Meh, just NA-T it Quote Link to comment Share on other sites More sharing options...
tbourner Posted February 25, 2010 Share Posted February 25, 2010 The rpm the next gear is in when changed will also need to be factored in. Surely the best thing is to keep the peak of the power curve in the middle of your change band? For example (with simplified numbers): Peak power is at 6000 (400BHP), you change gear at 6500 (380BHP), and in the next gear your revs are 5500 (380BHP) ready to go up and down the peak again. Your BHP never drops below 380 unlike if you changed at 7000 (360BHP) and dropped down to 6000 in the next gear. I'm not sure how much input the torque curve gives though, maybe you need a mix of the 2? Quote Link to comment Share on other sites More sharing options...
Thorin Posted February 25, 2010 Share Posted February 25, 2010 thorin is right Quoted for the truth. We're awesome aren't we? Quote Link to comment Share on other sites More sharing options...
Neil-NA Posted February 25, 2010 Share Posted February 25, 2010 I do alot of this spirited driving stuff in my N/A I only change gear when the needle is near the red and do alot of flat shifting. The limiter is there for a reason so i use it every once in a while Quote Link to comment Share on other sites More sharing options...
Wez Posted February 25, 2010 Share Posted February 25, 2010 Even the auto box in the NA takes it to the red so dont be afraid to use it Quote Link to comment Share on other sites More sharing options...
Holden1989 Posted February 25, 2010 Author Share Posted February 25, 2010 Meh, just NA-T it Inheritance this year, so proberly Quote Link to comment Share on other sites More sharing options...
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