Sensitive throttle pedal in non sporty cars? Blame the average driver - Page 5 - Miata Turbo Forum - Boost cars, acquire cats.

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Old 07-25-2013, 06:41 PM   #81
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last one looks way more similar to my forester settings than all the previous ones
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Old 07-25-2013, 06:43 PM   #82
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So no power till 90%+ gas pedal? Why not just a near straight line?

Btw i'm guessing the large humps in the middle is to negate the torque curve hump so the torque output vs the gas pedal angle is as linear as possible.
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Old 07-25-2013, 06:44 PM   #83
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Quote:
Originally Posted by triple88a View Post
Btw i'm guessing the large humps in the middle is to negate the torque curve hump so the torque output vs the gas pedal angle is as linear as possible.

yeah, it's like the inverse of the requested torque curve, it's supposed to make it feel very linear.
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Old 07-25-2013, 06:50 PM   #84
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also the dbw req torque table affects like a billion things and NOT just throttle plate operation alone
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Old 07-25-2013, 10:12 PM   #85
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Brain - I was experiencing something similar in my 08 STI (though not sure how similar the WRX ROM is). The fix was actually found by modifying the load compensation tables, and not Req torque. There are a bunch of threads on Romraider/nasioc/iwsti that discuss the "Fuel Line Mod", and modifying these tables after it. Again, not sure if this issue is unique to the STI, but the sensation you describe and illustrate with the help of Leonardo is very similar.

It looks like you're using RomRaider, so not sure what the tables are called there but in Cobb speak the two tables are:

Load Compensation (Accel)
Load Compensation (Cruise)

I don't know why they used correction factors for the load calculation, but reducing them to 20% of stock value made the throttle response feel significantly more linear. I did log knock sums / Knock Learning and Knock Correction and saw no change from stock... May be worth looking into..
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Old 07-26-2013, 08:13 AM   #86
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I'll look into it, but so far the lastest change it pretty good. I added in a bunch of tip-in enrichments too and it's possible I have too much sensitively on/off throttle right now. This could be just needing to relearn my technique, but we'll see how the stop/go traffic going home today treats me; but it was a little herky jerky going from a stop this morning.

Right now, the pedal feels much more linear--which is good. Cruise has moved from using the first 1-2% of the pedal travel to maybe the 5-10% zone. I feel like as I push the throttle down I'm adding load proportionately. It's much smoother between shifts, and it feels like I picked up a good deal of tq between 2.5-3K just as the turbo is winding up; but this could be from lowering the CL/OL delay a bit as well. And a lot of that delay I was complaining about seems to have been significantly shortened.

All in all it feels more like a DBC which makes me happy, it seems to react much faster to inputs and in a manner that I was expecting.


this video does a good job explaining the load compensation:

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Old 07-26-2013, 10:28 AM   #87
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NO WAY BRO!!! Your car runs better after you tune it? NO WAY!!

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Old 07-26-2013, 10:47 AM   #88
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Well i finally found a thread where smart people actually posted how it works and a good theory/method behind tuning it other than buying a tune from Torqued Performance.

People are really unwilling to share maps in the subaru community....
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Old 07-26-2013, 11:03 AM   #89
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Yes. Because most pay for them, or charge for them.
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Old 07-26-2013, 11:32 AM   #90
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Quote:
Originally Posted by Joe Perez View Post
So the moral of the story is that some Mazdas, some VWs and some Minis have a DBW configuration which, to some drivers, seems less optimal than the configuration found in some Subarus.

Glad we settled that conclusively.
I daily a supercharged Mini Cooper S manual(with dbw like any other new mini). it has none of the problems that are described in this thread.

seems to be some peoples cars. just do the throttle reset if your having a serious problem.

i havent had to but i believe on most cars you can do it through some weird combo of buttons and it just resets the system so it self learns again and re-scales everything back to day 1.


The reason for your car acting that way is because generally it has adaptive learning and it tunes the dbw along with everything else to the way you drive to help you keep driving the way you do.


then there is brains problem where he just wants to feel a subaru pull the second he gets on the gas. ive never seen a subaru with a turbo pull right away even if you cruise at 6000rpm. their turbos take forever to spool up, even with headers, up pipe, full exhaust etc.
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Old 07-26-2013, 11:37 AM   #91
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ive never seen a subaru with a turbo pull right away even if you cruise at 6000rpm. their turbos take forever to spool up, even with headers, up pipe, full exhaust etc.
yeah forever: a td04 equipped ej255 stg2 produces positive pressure by 2k rpm, and is close to peak boost by 2500.....forever
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Old 07-26-2013, 11:39 AM   #92
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it's almost like ive never driven a turbo car before...
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Old 07-26-2013, 11:48 AM   #93
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I told brainzo to start publishign all his awesome maps and totally screw up the whole map selling caper.
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Old 07-26-2013, 11:51 AM   #94
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all his 1 mild stage1 map? lolzors yeah he will revolutionize the subaru tuning world
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Old 07-26-2013, 11:55 AM   #95
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it really would. they'd be all like, oh ****, this car reacts to throttle inputs and makes lots of boosts and is generally not the suck and didnt cost $85.
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Old 07-26-2013, 12:00 PM   #96
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Quote:
Originally Posted by shlammed View Post
then there is brains problem where he just wants to feel a subaru pull the second he gets on the gas.
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Old 07-26-2013, 12:10 PM   #97
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Originally Posted by Braineack View Post
it really would. they'd be all like, oh ****, this car reacts to throttle inputs and makes lots of boosts and is generally not the suck and didnt cost $85.
haha the irony is that his maps actually have the same throttle settings as the ones you started with. and hated
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Old 07-26-2013, 01:08 PM   #98
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i wish there was a mt.net of the subaru world.
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Old 07-26-2013, 01:12 PM   #99
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Old 07-26-2013, 01:55 PM   #100
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Quote:
Originally Posted by 18psi View Post
yeah forever: a td04 equipped ej255 stg2 produces positive pressure by 2k rpm, and is close to peak boost by 2500.....forever
i had a 2871 1.6. i know what forever can feel like.


the 2.0L subaru was no better.


when i say forever, im also thinking of it in direct comparison to my Mini with a S/C running ~17psi at 1,500rpm as soon as I put enough load on it to close the bpv.
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