Smooth Throttle for UpRev

binary0x01

I'm with kennys370 on this. Keeping the engine cool makes the most diff. The fan mod works, with an aftermarket (proper if you will) oil cooler, it is gonna b perfect

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Jordo!

Finally tried it.

Honestly, felt no different to me than my tuned map, and in regular Drive, a bit less responsive.

Down shifts were a bit clunkier, not enough to be unlivable, but enough to make me think it's not an improvement.

Anyone who likes ETC off, try my throttle map instead -- feels snappier to my foot anyway.

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Sh0velMan

Using ETC off with an Auto is a bad idea.

ETC off with a manual, is heavenly.

You definitely shouldn't use ETC off with an auto, it could put a lot more stress on your transmission, those clunky downshifts aren't good for it.


Also - Flashing wipes learned fuel data, so you really have to drive it for a bit before making the call on whether or not it's more responsive. The engine will definitely be sluggish and soft until it gets some trim data saved.

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Jordo!

D'oh -- well only one downshift was clunky and under very low load, so hopefully its fine

If it follows TPS, it should be a linear function, and feel similar to the "smooth throttle" map. In theory the "driving force" value should enable you to tune it so it can be more responsive and peak faster, although it won't be linear anymore.

Oh well, guess it's all up to the individual driver.

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Sh0velMan

^ That is, of course, definitely true.

It's not really about the throttle following the pedal in a linear fashion.. I mean yes that's good and what you want, but really it's the reduction in "processing time". There isn't that split second delay while the ECU calculates throttle position based upon user input, load and RPM. It just goes where it's supposed to be.

Also, it means VDC can't close the throttle. All it can do is apply brakes to prevent spins. I actually did a run by accident at my last AutoX with VDC still on and it was faster than the run before it...

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wstar

You still want VDC off though, otherwise it's patching over stuff you should be feeling and correcting for yourself (and there are some corner cases where it could really upset the car and spin you out of a corner by tapping the rear brakes at a really bad time).

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Sh0velMan

Oh definitely. Was just interesting that it was hands off enough without ETC that I didn't notice until well over half way through my run.

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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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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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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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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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