Smooth Throttle for UpRev

wstar

The 2700 Curve doesn't work right at all in the upper RPM range, it never even quite achieves full throttle opening. I don't think anybody really understands this map completely (probably because there are other related maps that UpRev hasn't decoded yet). I did try several other intermediate values, but the 2300 one came out the most ideal.

Keep in mind my criteria though:

My problem with the stock map is it doesn't allow the car to go full throttle from low RPM. Basically it restricts throttle response until the RPMs get a bit up "out of the hole" and then gradually opens the full throttle as the RPMs rise. This seems to be mostly to keep people who probably shouldn't be driving this car from stomping the pedal from a standstill and spinning out into the guy in the next lane.

The fix for this is to fix the final column of the table so that the low RPMs do the same thing at full pedal that the high RPMs do. However, you then still have to smooth the table back out in some sense, and if you don't do it right you end up with non-linear and/or jerky (and/or flat out buggy) throttle response. My goal in doing that smoothing is not "open up the the throttle as quickly as possible relative to pedal position". That's what some other people seem to want, and it's what those add-on generic electronic throttle fixups do, e.g. Why SprintBooster Works .

If I want the throttle open faster, I'll simply apply my foot faster . Technically a technique like the sprint booster uses probably shaves 20ms or whatever off of the total response time when you stomp the pedal to the floor in a drag race, but it does so at a sacrifice to throttle smoothness in the rest of the range, which is unacceptable to me.

So, to sum it up, I think the 2300 Curve data (at least on my car/ECU) resulted in the best possible results in terms of those goals: Instant full engine throttle when you stomp the pedal down at any RPM (well, assuming no wheelspin + VDC interference, etc), and a linear, smooth pedal response throughout the pedal's range, to provide for maximum nuanced throttle control for real driving (as opposed to some other maps or the sprint booster, which will leave you with fast and slow spots in the pedal range that don't respond linearly to foot input).

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7AT Track Car!
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BigT

Thanks for all your research wstar.

I wonder if anyone could dyno a 370z with ETC off. Should be interesting to see what happens.

zguynate

Wstar thanks for posting your results! I plugged your chart into my electronic throttle and the drivability of my Z changed a pretty good bit. Im really content with your chart.

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2009 370z touring w/sports package

Hermitns

ARRRRGGGGHHH, I thought I left hexadecimals behind when I retired. Tks for the flashbacks...lol Great tech post tho

roplusbee

I am interested in the ETC off friving experience. Sounds like it would be the RAW experience that everyone is missing.............at a cost though. Honestly, I rarely use SRM, VDC, or Cruise. Once bad weather hit, I would be missing VDC and SRM and Cruise on that 1600-1800 mile trip home to Baltimore or back. I may check it out once I get back from leave and see how RAW it really is!

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2007 350Z NISMO #0618: Zerolift | UPREV | F.I. | Greddy | Competition Clutch | Injector Dynamics | Aeromotive | Pioneer | JL

seymore4

Awesome thread. sub'd for future results. I've got access to a tuner cable so if anyone wants me to modify their tables just shoot me a pm

Jordo!

I was reading up on this in the Uprev manual, and it sounds like the ETC table is important for determining line pressure for shifts under load. If so, what if line pressure was just bumped up across the board and ETC was off?

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Enjoy it. Destroy it.

ZForce

Very geeky gear head stuff. Subscribed for future reference when I can muster up $$ for a tune. Will be some good data to pass on to the tuner.

ANMVQ

Wstar,thanx man so helpful. but ? So you have all the tables at 3800. I'M going to see mg tuner at 12 and wanTed to see where mine where set. I'm also going to set the fan speeds to low @185 med @200 and high@215. Is that right. thanx man.

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

wstar

Is it? I don't recall reading that. Line pressures are controlled by the Torque Map table, which is a different thing from the throttle table. Some people bump it by ~5-10% across the board. Raising it even a little bit too much can result in jerky shifts though. The advice I got from UpRev was to datalog (via Cipher) for any slip in the transmission. If you're getting slip, raise the Torque Map values. If you're not, don't.

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Journal thread / Car setup details

wstar

I'm not sure I understand the question here. The table basically describes points in a 3D square surface. One edge of the square is set at all-3800, but the rest curves off smoothly. Just setting 3800's in the last column isn't sufficient, and neither are any of UpRev's built-in simplistic smoothing models.

Keep in mind all I've done here is experiment on my own car. I don't have other cars to compare with, test on, or look at the stock maps on, so this is mostly for people with a Tuner license who are also willing to experiment.

If you're going to have a 3rd-party tuner try to play with the throttle map from my first post, I'd advise you have them read the whole thing and compare your stock map to the stock map I posted at the bottom of that first post.

I haven't had time to fully explore the fan speed option. I'm not 100% sure how it operates relative to the table until I test it (whether the ECU interpolates between the low-temp column and the next one up, or if they're just switching points, that's my biggest concern).

In general though, the ideal for the fans for me would be: 1) Ignore whether the AC is on or off, 2) Keep the fans off at low coolant temps, 3) Turn them on full blast and leave them on, starting at about 185.

Well, there's also the speed thing. It might make sense to turn them down/off at high speed when the car gets plenty of air on its own. I'm really not sure about this point. I could see useful arguments in either direction. Maybe having them spinning at speed still helps channel more of the incoming air in the right direction (into the radiator instead of around it). Then again maybe it doesn't change anything for the radiator and just adds turbulence, or worse maybe it actually slows down the incoming air to have them on. I have no clue about this stuff, and not sure yet how I'll get data.

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ANMVQ

Hey. thanx man. really!! The reason I ask about the tables is I Think we just used 3800 across the board. to hey the TB To open full from a stop. the pedal down and hesitation kills me. LOL.

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

SurfDog

Wow I'm going in for my first tune in about a week. One week to try to comprehend some of this awesome Data. Thanks

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09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix

ANMVQ

Well the changes went good. Car feels like a different animal again, I can actualy feel the car twist coming of the line , WOT respones is back and feels WAY different, I wonder if the ECU releaned how I HAVE to drive becasue of traffic,. All I know is we reflashed it made two small fuel( Took some away) and added some timing and different car,, We also changed the fan control, My oil temps on a typical day ( 70-75 degrees) City driving -traffic would be right around 200-202 deg, After we made the changes I saw nothing over 180.

Tranny temps where about 165, Norm same day driving was around 185 or so,.

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

Baer383

I added this to my throttle map on the rom editior about 2 weeks ago and it works very well,a little touchy but you get use to it.

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2013 ZL1

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