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Old 12-19-2007, 12:54 AM   #1
hmanxx
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Default Throttle duty cycle mapping table

Anyone by chance find out the DBW throttle duty cycle mapping table. It has the TPS vs RPM axis..Throttle duty cycle as data. Errr. C0bb tuning guide mentioned that which could be used to solve the deceleration too fast and engine stall issue due to lighten pulley,flywheel.

I am trying to map the throttle torque request table and the throttle plate mapping table..there is some similarity on the throttle plate position mapping on the last rpm row..where the Enginuity showed torque cut...likewise the same on the C*bb throttle body duty cycle table..it is cutting it to 20++ % throttle duty cycle.

ANy chance..it is refering to the same map.
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Old 12-19-2007, 04:28 AM   #2
dynamix
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There is another map included in the latest definitions that may be closer to what you are looking for.
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Old 12-19-2007, 09:49 AM   #3
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Quote:
Originally Posted by hmanxx View Post
I am trying to map the throttle torque request table and the throttle plate mapping table..there is some similarity on the throttle plate position mapping on the last rpm row..where the Enginuity showed torque cut...likewise the same on the C*bb throttle body duty cycle table..it is cutting it to 20++ % throttle duty cycle.

ANy chance..it is refering to the same map.
Cobb's map you are referring to is the same as 'Requested Torque (Accelerator Pedal)' in Enginuity. The torque values in this table are arbitrary. Cobb just represents them as percentage of the maximum torque (also an arbitrary threshold given by the ECU). But you really need to look at the 'Target Throttle Plate Position (Requested Torque)' in Enginuity (not sure what Cobb calls that table). Both tables are necessary to get a complete picture of what is going on. That is, the target from the 'Requested Torque (Accelerator Pedal)' table is used as an input (x-axis) to the 'Target Throttle Plate Position (Requested Torque)' table.
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Old 12-19-2007, 10:39 AM   #4
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If you're trying to stop the throttle drop, increase values in the throttle plate position table at 0 requested torque, but do it in small increments or else you'll end up overriding the normal idle speed.

I think cobb leaves one of the tables hidden, or just hasn't updated (didn't older enginuity use a single throttle duty table instead?). Cobb does simplify a few other things in an effort to 'dumb down' the tuning for the end user, that or they just don't care about the street tuner anymore which is evident to me by the pos dashboard, logger, 'advanced' upgrade, and not checking up on their own tuning forums.
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Old 12-19-2007, 03:11 PM   #5
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Be careful you don't put too high a value in the 0 column. Cruise control could end up hunting for the correct throttle during some downhill driving.
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Old 12-19-2007, 03:16 PM   #6
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DBW cruise control won't go to 0 throttle even on the stock mapping. If you're going down hill, the car will accelerate. Hit cruise cancel and the car will actually go to idle and start decelerating. It also won't go to WOT. Those two combined make it useless in the hills.
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Old 12-19-2007, 03:31 PM   #7
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That's not true.

It's a linear interpolation.

On some light freeway hills (not super steep), it uses the the 0 column and the column next to it (I can't remember the value).

This is speaking from experience.

BTW, when I meant "hill", I meant freeway type slopes which really aren't that steep. Cruise control should only be used on freeways.

Last edited by mickeyd2005; 12-19-2007 at 03:39 PM.
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Old 12-20-2007, 03:14 AM   #8
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Besides the application of touching up the 0% column to cushion the effect of to fast deceleration..

I found that remapping MY06 WRX Torque request table + Throttle plate position tables to " MY06 STI" profile(for Torque requestVsThrottle position+ THrottle plate pos A/B tables)..give very wild low end throttle response. On a TD04 stock turbo ...I test drove the car that I tuned...****..the car started to spool at 2krpm.

I saw some variance map derived from XPT map,only change the torque request table.close to STI .doing so doesnt give as much impact as compare to remapping all associated tables close to STI throttle mapping.
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Old 12-20-2007, 11:03 AM   #9
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Just copy the 07 EU STI DBW settings for a linear throttle.
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Old 12-20-2007, 04:05 PM   #10
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Quote:
Originally Posted by gabedude View Post
Just copy the 07 EU STI DBW settings for a linear throttle.
Is that what you have in r29?
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Old 12-24-2007, 12:43 AM   #11
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Quote:
Originally Posted by irascible View Post
Is that what you have in r29?
06 STI settings. I heard that using the 07 EU STI settings on an 06 WRX gets some better response, so try it.

Gabe
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Old 12-24-2007, 05:55 PM   #12
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Quote:
Originally Posted by gabedude View Post
06 STI settings. I heard that using the 07 EU STI settings on an 06 WRX gets some better response, so try it.

Gabe
Cool; i'm still reading forums, learning as much as I can find. Since enginuity is still down, it's taking a little longer trying to find stuff. For now, i'll leave it as is until I know where to find these settings and how to replace them properly in r29.
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Old 12-24-2007, 06:40 PM   #13
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I am currently running a variant of the 07 EU STi setting on my 06 WRX and have not found a better setup to date. It is very linear and smooth. It fixed a little bit of my stumble issues as well as made the car more driveable.

What I really need now is a way to figure out how to convert the "Requested Torque" table into the same format that the Street Tuner has so I can make sure I'm running the same throttle maps on the Street Tuner as the Base Map.
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Old 12-27-2007, 06:50 AM   #14
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I did the same..I am mixing Gabedude Torque request table with EDM MY07 STI throttle plate mapping..this gives the best result..smooth throttle response..and the first gear move off is so damn light.

I have done it on 3 MY06 2.5L EDM with VF30(very smooth linear response), VF22(loving it to the core..make the response close to stock td04 response) and TD04(very wild spool).
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Old 12-27-2007, 11:09 AM   #15
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+1 on the EDM 07 STi Throttle mapping. Better response and smoother 1st gear starts..
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Old 01-18-2008, 06:09 PM   #16
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Can anyone tell me if modifying a stock 2006 WRX throttle mapping table to that of the EDM 07 STi would harm anything or cause any undesirable consequences?

Last edited by Nargaredama; 01-18-2008 at 06:14 PM.
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Old 01-18-2008, 06:25 PM   #17
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You actually don't need to copy the table from another car. You can work out the correct table for your car by plotting accellerator pedal angle vs. engine load for a narrow range of RPM (i.e. you'll be using the brake to prevent the car from accelerating as you push down on the throttle). Ideally, the plot would be a straight line at 45*, but on my car it shot up very steeply from 0 and then flattened out above 80%. The net result of this was that I was getting 80% of max torque in the first ~35-40% of the pedal travel. I re-did the 'Requested Torque (Accelerator Pedal)' table so that from 0 to 80 % pedal angle, the Requested Torque value is 1/2 the Accelerator Pedal Angle %. Then 100% is 100.

This has made the car MUCH easier to drive. It no longer tries to lurch or buck when idling though a parking lot or drive-thru. Stop and go traffic is no longer a nightmare. Surprisingly, the car is now WAAAAY easier to steer on the throttle when you've got the tail hung out (I suspect that as I tried to feather the throttle to control the angle of the drift, the when I fell off the plateau onto the steep part of the mapping it just killed it). It also finally shifts like "a car" rather than "a DBW car".
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Old 01-19-2008, 12:01 AM   #18
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I like to keep a very shallow slope below 20% accelerator pedal. The 2005 stock LGT has a good throttle map below 20% accelerator pedal so I just leave that as is. I like to keep this shallow so that stop-and-go traffic is easy to manage.

I then smoothly ramp the requested torque between 20% and 65% accelerator pedal. This gives me a shorter total pedal travel to get to 100% throttle angle. This allows for slightly easier heel and toe shifting.

I'm not a very good driver, but one person tried my throttle mapping in auto-x and he was very pleased with it.
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