Race Dynamics : The tech review

[Shan2nu]

The RD0601 also comes with a launch control. All one needs to do is ask Karthik to enable it. I got to get mine set too.

But don't you need wheel rpm sensors to detect a wheel spin for the ECU to activate launch control? Do RD have their own sensors?

Shan2nu

[Rehaan]

Originally Posted by Shan2nu

But don't you need wheel rpm sensors to detect a wheel spin for the ECU to activate launch control? Do RD have their own sensors?

I'm guessing it is more like a "launch mode" where the ECU just holds the car at X rpm, and not a full fledged launch control (= coupled with TCS) ?

cya
R

[Shan2nu]

I'm guessing it is more like a "launch mode" where the ECU just holds the car at X rpm, and not a full fledged launch control (= coupled with TCS) ?

But even for that you need a car with TCS. Cars like the OHC, Baleno etc don't have TCS, so in such cases you will need to fit aftermarket sensors.

Shan2nu

[condor]

Ford Rocam : Economy in sense throttle < 40% or < 4000 RPM, you can tune your map up to a particular load point to run 14.7 A.F.R in closed loop or even slightly leaner 15.1 AFR, depending upon engine combination, c.r etc, ...

Is this practical - in terms of putting it to actual use ?

I ask this in the context of engine speeds vs gear used. In city traffic, one will not be able to get into higher gears. So one can still be in the same engine speed (range) even if driving at 20kmph in 2nd - or 35 kmph in 3rd - or 50 kmph in 4th.

While my own case is not a good example - but I am often at same / higher rpms in city than when on the highway.

[Ford Rocam]

Originally Posted by condor

I ask this in the context of engine speeds vs gear used. In city traffic, one will not be able to get into higher gears. So one can still be in the same engine speed (range) even if driving at 20kmph in 2nd - or 35 kmph in 3rd - or 50 kmph in 4th.

Thats thing is called as Part Throttle Tuning. Its more difficult than w.o.t tuning especially if you are running larger injectors.

Originally Posted by condor

Is this practical - in terms of putting it to actual use ?

I am using it on a daily basis, infact i was running 750CC injectors in N.A mode without even turbo installed with the old 4-1 headers to set my part throttle tuning correctly,check my garage for details.

[Psycho]

A couple of points at my end

1. Still feel that closed loop support can drive it way better than having a tuner sitting and struggling with 3 maps.
2. closed loop in link with a wideband sensor can allow for more accurate afr based tuning which is way better than multiple maps.
3. the stock ecu is any way the best mileage map that one gets so if one practices restraint on the right foot the mileage actually goes up with a performance map.

[Jaggu]

Originally Posted by Psycho

3. the stock ecu is any way the best mileage map that one gets so if one practices restraint on the right foot the mileage actually goes up with a performance map.

I was also thinking on these terms, point is: The new curve is optimized for torque delivery right? so with a gentle foot the FE should show improvement ??

[Psycho]

Yes Jaggu that is exactly what i was getting at. The best maps are designed to increase the ve of the engine hence increasing driveability and mileage on na and off boost on forced induction engines.
With free revving engines our right feet also tend to go pedal to metal more often making us loose mileage in return.

[rdkarthik]

Originally Posted by Psycho

A couple of points at my end

1. Still feel that closed loop support can drive it way better than having a tuner sitting and struggling with 3 maps.

Coming soon

2. closed loop in link with a wideband sensor can allow for more accurate afr based tuning which is way better than multiple maps.

Yes, but cost goes high to have a permanent wideband lambda sensor.

3. the stock ecu is any way the best mileage map that one gets

No

[nitrous]

Originally Posted by RDK

Yes, but cost goes high to have a permanent wideband lambda sensor.

Yeah,man. The best deals I've come across cost around $300.

[Psycho]

Hey Kartik,
Please read point 3 in the earlier post as the stock ecu isnt, there was a typing mistake as i have been posting from my phone.

[Shan2nu]

3. the stock ecu is any way the best mileage map that one gets so if one practices restraint on the right foot the mileage actually goes up with a performance map.

Please read point 3 in the earlier post as the stock ecu isnt, there was a typing mistake as i have been posting from my phone.

But how can a performance map make an engine more FE than stock?

Shan2nu

[PatienceWins]

Originally Posted by Shan2nu

But how can a performance map make an engine more FE than stock?

Shan2nu

I am having the same doubt.

My understanding is that more fuel is required to handle the new custom map. How is a lighter foot help in getting FE compared to stock ECU as the custom map would be straining the engine more?

[Shan2nu]

My understanding is that more fuel is required to handle the new custom map. How is a lighter foot help in getting FE compared to stock ECU as the custom map would be straining the engine more?

Spoke to Psycho and Wolf about this today and from what i can rem, a custom map doesn't posses the ability to vary it's AFR to an extent, to which a custom map is capable of.

So in cruise mode, it is possible that the custom map is actually running leaner than a stock setup, which helps it achieve better FE (which is similar to what Rocam was saying).

Maybe Karthik can give a detailed explaination as to how this works.

Shan2nu

[ported_head]

Originally Posted by Psycho

The best maps are designed to increase the ve of the engine hence increasing driveability and mileage on na and off boost on forced induction engines.

How does a map change VE of an engine? Only change in quantity of volumetric flow because of fuelling? Or something else?