EcuTek RaceRom Flat Foot Shifting !

[mroczeK]

wow that is impressive, (im an MT noob, been driving an auto most my life until i got my 86) but does using this feature potentially damage the clutch/gearbox?

does it wear the clutch out quicker?

[fenton]

Originally Posted by Rawdog

so does it do that only during WOT or I'm I going to be getting some weird looks everytime I shift driving around town?

If you are WOT and your clutch pedal gets pressed in there is a secondary rev limited activated (say 5500 rpm). This way when load is taken off the car(clutch in) the car doesnt rev to 7500 rpm and bounce of the limiter. Instead the car naturally comes down from 7500 rpm and will sit and bang off 5500rpm until you let off the clutch. Once the clutch is out again the 7500rpm limit is active again.

He was short shifting in the video so he was actually reving up between shifts which would not feel good to do on the road. Typically you set it at 5000 this way when you shift at redline it is seamless between gears and you wont get TOO much of a jerk. Someone correct me if i am wrong but this is how it worked in my11 sti

[fenton]

Originally Posted by mroczeK

wow that is impressive, (im an MT noob, been driving an auto most my life until i got my 86) but does using this feature potentially damage the clutch/gearbox?

does it wear the clutch out quicker?

It is very hard on the clutch and the gear box. It is akin to dumping the clutch between gears.... meaning when they clutch is being connected back to the flywheel there is already load from the engine on it.

If it is synced up perfect and you get really use to it the damage will be much less but you are still trying to connect something that is loaded and spinning at a higher rpm to something that is freely spinning at a lower rpm.

[fenton]

One more thing....the reason most do this in a boosted application is the ability to maintain some amount of boost between gears so you don't have to spool out of vacuum every shift.

My sti would hold about 9psi between shifts saving me about half a second of spool at wot shifts

Sent from my Galaxy Nexus using Tapatalk 2

[Visconti]

Originally Posted by fenton

If you are WOT and your clutch pedal gets pressed in there is a secondary rev limited activated (say 5500 rpm). This way when load is taken off the car(clutch in) the car doesnt rev to 7500 rpm and bounce of the limiter. Instead the car naturally comes down from 7500 rpm and will sit and bang off 5500rpm until you let off the clutch. Once the clutch is out again the 7500rpm limit is active again.

He was short shifting in the video so he was actually reving up between shifts which would not feel good to do on the road. Typically you set it at 5000 this way when you shift at redline it is seamless between gears and you wont get TOO much of a jerk. Someone correct me if i am wrong but this is how it worked in my11 sti

Not like Cobb ....

The secondary rev limiter is 100rpms higher then the point you push the clutch in.

So let's say you no lift @ 4000 rpms, no lift activates at 4100.

Now let's say you no lift @ 3500, no lift activates at 3600..

In the world of rally the static 5500rpm no lift shift is junk.

[MannyO]

What an awesome way to start the day.

[Visconti]

This no lift shift also adjusts timing and fueling...

That's why it's called RaceRom Flat-foot!

What do you get when you spell RaceRom backwards... Anyone anyone ?

[fenton]

Originally Posted by Visconti

Not like Cobb ....

The secondary rev limiter is 100rpms higher then the point you push the clutch in.

So let's say you no lift @ 4000 rpms, no lift activates at 4100.

Now let's say you no lift @ 3500, no lift activates at 3600..

In the world of rally the static 5500rpm no lift shift is junk.

makes sense. what happens when you no lift at 7600? that would be a violent shift at redline or 7700 rpm?

Engine spinning at 7600 and trying to engage a gear at 5000 doesn't sound like a fun time.

[Visconti]

Originally Posted by fenton

makes sense. what happens when you no lift at 7600? that would be a violent shift at redline or 7700 rpm?

Engine spinning at 7600 and trying to engage a gear at 5000 doesn't sound like a fun time.

Hrmm that's a interesting idea that I never thought about....

That could be a problem.

I'll talk to ecutek about this and most likely have a additional table added so above let's say 7000 rpm it flatfoots an adjustable amount of rpm below instead of above.

Thanks for pointing that out !!

[chuy21]

I like how this lets you flat foot at pretty much any rpm. My cobalt only lets me no lift when near red line or I risk getting knocks =/

[fenton]

Originally Posted by Visconti

Hrmm that's a interesting idea that I never thought about....

That could be a problem.

I'll talk to ecutek about this and most likely have a additional table added so above let's say 7000 rpm it flatfoots an adjustable amount of rpm below instead of above.

Thanks for pointing that out !!

No worries. What you said makes sense and seeing how the car knows what gear it is in it should be easy to match the next gear +500 rpm. I would have thought they would have done that for all rpms as over revving by 100rpm and engaging the next gear is always going to be pretty rough. Should be good for chirping the tires between gears though....poor drive train

[Visconti]

Originally Posted by fenton

No worries. What you said makes sense and seeing how the car knows what gear it is in it should be easy to match the next gear +500 rpm. I would have thought they would have done that for all rpms as over revving by 100rpm and engaging the next gear is always going to be pretty rough. Should be good for chirping the tires between gears though....poor drive train

Ya I gotta check.. It might engage 100 rpms below instead of above..

[fenton]

Originally Posted by chuy21

I like how this lets you flat foot at pretty much any rpm. My cobalt only lets me no lift when near red line or I risk getting knocks =/

Same with the STI. Had to shift it at redline as there was only one RPM possible in COBB FFS. I like this idea better but seeing how much that car is moving and jerking on the dyno it would be interesting to see it on the road.

[Memphis]

Jelly. Like real jelly...and just... jelly.