Smooth Throttle for UpRev

DIGItonium

Throttle response... it is all computer controlled. OEM settings are too conservative, so initially there isn't much power under 2k RPM due to the computer limiting throttle actuation. Plus, there is an awkward abrupt transition as you depress the pedal. I believe wstar's settings allow for smoother transition in throttle actuation, more natural response, and possibly more power allowed at low RPM range.

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Shamrock

This basically means a feeling of a less aggressive acceleration?

DIGItonium

You ever feel like no matter how far you press down on the pedal at low RPM, it doesn't make much difference? Then there's the annoying surge after 2k RPM. I think this is what fixes it, but I've not personally tried it. Currently thinking about selling the car for a dream car (one day). If not... bigger pipes, and a new tune which includes this new throttle map.

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wstar

It's all complicated and subtle. The basic idea is that by tuning the table you can get the throttle to open faster at low RPM, but the normal way people do it (which does open the throttle faster) leads to a stair-case effect in the mid-upper range, which can be annoying if you want fine smooth control of your throttle. The idea with the Curve 2300 map is to still open the throttle faster at low RPM, but also be smooth through the upper ranges so that you have good control.

I would imagine a lot of people would think their car feels slower by seat-of-the-pants feel on my map, as compared to a naive tune or those hardware throttle boxes. The idea here is smooth fine control. The stock map is smooth as well, but again has the limitations at low RPM.

Also, I haven't look at this stuff for quite some time. It's still running fine on my car, but I imagine now that UpRev has started unlocking VVEL params, there's probably a lot of new info to work with on throttling as well. Back when I worked on this table, UpRev really wasn't sure what this "throttle" table actually did or what the real parameters its controlling are, it was just trial and error. They must have a better idea by now since it's so tightly coupled with VVEL control.

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7AT Track Car!
Journal thread / Car setup details

DIGItonium

Just to be sure... did you eliminate the hesitation up to 2k RPM? I won't be able to much with the car for awhile (house stuff = no money) hahahaa.

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Baer383

All of the problems you guys are stating I have adjusted out,no more dead spot off tip in and below 2k it feels fine partly b/c I have a SC for the N/A guys I don't know.

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2013 ZL1

754 rwhp 747 rwtq

wstar

No, the throttle map doesn't eliminate hesitation below 2k. It's not all of the problem, so it can't be all of the solution. When you look at the "hesitation" type threads, you'll see there's actually several causes. Some are trivial like cleaning the 2xMAFs and the MAP sensor, or finding an intake leak, or realizing you're driving in really thin (hot) air. Some aren't. Some are intrinsic to how this ECU operates apparently, or related to other tables.

All I can say definitively on that is: the stock throttle map doesn't allow the virtual throttle to reach 100% at low RPMs, whereas most tuner throttle maps do, and so does this one.

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7AT Track Car!
Journal thread / Car setup details

DIGItonium

Understood, I'm on the fence right now... but we'll see about next year if I decide to [keep the car and] continue with some upgrades and tune. With the way things are going, I'm probably better off keeping it and turning it into a responsive 500whp monster. [shrugs]

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elperuano

Lol I can never get my RPMs under 2k!

Baer383

You must have a very high idle.

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2013 ZL1

754 rwhp 747 rwtq

elperuano

Lol! It's right around 800-900 but a the touch of the gas in 1st gear with boost my rpms shoot up fast. Every shift after its over 2k.
I went with Jon @ Z1 so I'm guessing he smoothed it out.

Baer383

I used the 2300 throttle map and when I tuned my car I saw (while logging in ROM editor) where when you move the gas pedal from let's say decel to on the gas a very bad transition so I saw the 16 cells that were really lean fix that on now you can't tell when I'm on or off the gas.

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2013 ZL1

754 rwhp 747 rwtq

elperuano

That's interesting, so it's like u constantly have accelerator pressed even when ur not pressing down on it? As far as lean spots go do you mean when off the gas coming up at a red light or stop sign?
I don't have any lean spots that I can tell when data logging or checkin my a/f gauge, but sometimes I get a weird reading when in boost from 2nd or 3rd with lots of wheel spin. Was actually wondering if its readin it right or wrong during wheel spin since I'm not actually gripping n maybe it might throw reading off for a second. Highway runs tho my a/f seems spot on around 11.2

DIGItonium

For my situation it's not just flooring it, but just normally taking off in 1st the car ramps up slow regardless of throttle position and surges forward after 2k RPM. But yes, I do have to keep the RPMs above 2k to get out of that slump.

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elperuano

I'm running os giken clutch so to take off I needa put a little more throttle to get going but by the time I'm off and running my rpms travel up pretty fast. Mine doesn't seem slow, and I can't give it full throttle cuz boost will already be creeping up and it's buncha wheelspin.