Now that I've broken in my car finally, I'm just wondering what is really the fastest way to accelerate when shifting through gears. I dont know if its just the feeling, but It seems like whenever you go from a stop, jump on it, and shift just as you get out of the power band (5k) that it accelerates faster than if you were to redline each gear... Is this true or just how it feels?

 

no that is very true. each car has its own power band and it begins and ends at certain points. pretty much all cars don't make full power at redline...its usually a few 100 rpm's before that. my car cuts out at 6200 or so but i shift at 5800 cuz thats where my car's power band ends and its where the next gear will be at the start of the power band again....so there is no point to go beyond that...for my car at least...but yet...u want to make sure that when you shift the rpm's don't go too far below the start of the power band or else you'll be slower.

 

thats how it feels, i just went through the same thing. But if you shift at 5500 you will drop it down to like 2500 -3000 in next gear and theres no boost there so you will not accelerat as fast, you should shift just before redline.

 

Think I'm going to do some testing at the track and see what the different times show based on shifting.

 

Yeah.. I get that too.. It sucks that when you shift up to like 5000rpm, it drops when you change gear.. And RPM goes up slow, even when my foot is pressing on the gas fully already.. Any mod that can make tha car accelerate faster?.. I got an AEM CAI already.. and Greddy soon...

 

I heard a hyper grounding kit helps acceleration response, it's not a HUGE difference... but it's something.

 

ok there is goin b BIG diff in you guys LANCERS and us EVOS shifting at diff rpms...

 

I can't say that I truly know what I'm talking about, and I'm not an owner yet, just a test-driver. But, in looking at some road dynos and recalling that each gear seemed to cost about 1250rpm, I think shifting earlier might be the key.

The most torque comes in around 2500 til 3000 and, if you want acceleration, I think that's where you want to be - the "sweet spot", if you will. This range may change by gear. Dynos will tell the story. But, if you can shift and land in the high upswing of the torque curve each time, I'd think you'd get optimal acceleration.

Does that all sound right? Anyone have dynos of each gear and able/willing to test this?

Thanks!

 

*bump*

Any evo owners have some input on this?

 

there are two perspectives you can have on this...true acceleration and percieved acceleration (if i spelled that right)

in the evo you have max boost and torque at 3500 rpms. then the boost and torque tapers off as you rise in the rpms. so when accelerating in the evo it is percieved that after 4000 rpms you aren't really accelerating that fast. which is true since torque is dropping...now a mistake would be to shift too soon though. since max torque and acceleration comes at at 3500 rpms you want to rev the previous gear to the point where you will be at max boost in the following gear.... now i don't know the exact numbers off hand but most of the rations in the evo from gear to gear vary about 1250-1750 rpm difference between gears. so in order to do drop into the 3500-4000 rpm range in an upshift you should run the previous gear to about 5500 - 6000 rpms. if you run it much past 6000 rpms you don't accelerate as fast in the next gear and you aren't utilizing the entire powerband.

This is what i have experienced. but no track testing has been done...this is purely from road use and engineering principles

any comments or questions?

 

That's basically what I was saying! Now, if we had some dynos by gears and some timings... *laugh*

 

Evolutions do not actually shut off until about 7700rpm-7800rpm... it is advantageous (big word) to shift near shut off in at least 1st gear and possibly 2nd......

Then most people switch at about 6900-7000rpm from there on up.

I have not tried to powershift my car with my foot flat on the gas yet...... I usually keep my foot about half way down to try and keep the boost up while switching.

Hope that helps alittle.