Smooth Throttle for UpRev

DIGItonium · 10-05-2011, 08:07 AM

Since we have 5 maps to switch from, are you able to put this table on one of the maps and retain the original table for say... winter driving?

Oh I see you have 7AT... I wonder what the tables for 6MT and 7AT are like.

BTW... since I only have the cable that came with the GTM kit, do I still have to buy the s/w separately to log and view this stuff? I didn't hear anything from UpRev.

wstar · 10-05-2011, 08:32 AM

Good question. If you have an UpRev cable, it probably has some sort of license attached to it, the question is which kind. If you go to UpRev - Engine Management, you can download their software there. Either Cipher or Osiris Standard (one of the two, probably Cipher) comes with a License tool that will tell you what your cable is licensed for.

DIGItonium · 10-05-2011, 09:13 PM

Quote:

Originally Posted by wstar

Good question. If you have an UpRev cable, it probably has some sort of license attached to it, the question is which kind.

Thanks! Got it. Everything's disabled except Cipher. It appears I am also able to flash the ECU, but not dump it.

It'll be nice to "open source" the throttle control project. Pretty soon flashing our cars is like Android flashing our phones.

wstar · 10-06-2011, 12:20 AM

It's probably a "Standard" license then. You can probably upgrade it to Tuner, but you should send them a License Report from that cable firmware tool first to be sure.

Unfortunately modding our ECU (or any car ECU really) is never quite as open a process as I'd like. I'm an open source developer myself, but the ECU world is all about trade secrets and warranties and whatever.

Nissan doesn't tell anyone how the ECU works. UpRev reverse engineers it to tease out whatever maps they can, but the deep details they produce (which allow them to make their roms and tools), they keep to themselves so they can run a profitable business, as it takes a lot of money to do the reverse engineering of this stuff.

I plan to continue posting whatever I can about whatever I can learn from playing with the tables in the Tuner edition of UpRev, but I don't think that will lead to anything resembling an open source ECU for our cars. Mostly it's just to reduce duplication of effort figuring **** out.

wstar · 10-05-2011, 08:34 AM

Quote:

Originally Posted by DIGItonium

Since we have 5 maps to switch from, are you able to put this table on one of the maps and retain the original table for say... winter driving?

The smoothed map isn't incompatible with winter, at least not on my car. It's just... smoother, while still reaching those 3800 values that my tuner seems to think allow easier WOT at all RPMs. The main thing I need to figure out now is whether I'm being robbed of raw acceleration in exchange for this smoothness because he's got the idea behind these table numbers totally backwards

wstar · 10-05-2011, 03:56 PM

I got some support via email from UpRev today on this. Basically they confirmed that setting the 3800 values up high is about what they normally do to get better WOT capability on Z/G cars in general. They also confirmed that nobody really knows how this table works, it's just trial and error. To quote from their Nissan tuning guide PDF:

Quote:

7. Electronic Throttle
X-Axis = Unknown theoretical value (follows accelerator, but not perfectly); Y-Axis = Engine RPM
The values in this table affect how aggressive the throttle response is.
** Electronic Throttle tuning tips: Tuning this table is a matter of trial and error. Usually raising the values will cause more throttle opening, but it is a balancing act, if the values are too high the throttle may become unstable

Anyways, I'm going to continue trying out various refinements to how my table is set up, in case my current smooth map at the top of the thread can be improved.

10-05-2011, 08:07 AM	#1 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 44	Since we have 5 maps to switch from, are you able to put this table on one of the maps and retain the original table for say... winter driving? Oh I see you have 7AT... I wonder what the tables for 6MT and 7AT are like. BTW... since I only have the cable that came with the GTM kit, do I still have to buy the s/w separately to log and view this stuff? I didn't hear anything from UpRev. __________________

10-05-2011, 08:32 AM	#2 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	Good question. If you have an UpRev cable, it probably has some sort of license attached to it, the question is which kind. If you go to UpRev - Engine Management, you can download their software there. Either Cipher or Osiris Standard (one of the two, probably Cipher) comes with a License tool that will tell you what your cable is licensed for. __________________ 7AT Track Car! Journal thread / Car setup details

10-06-2011, 12:20 AM	#4 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3596	It's probably a "Standard" license then. You can probably upgrade it to Tuner, but you should send them a License Report from that cable firmware tool first to be sure. Unfortunately modding our ECU (or any car ECU really) is never quite as open a process as I'd like. I'm an open source developer myself, but the ECU world is all about trade secrets and warranties and whatever. Nissan doesn't tell anyone how the ECU works. UpRev reverse engineers it to tease out whatever maps they can, but the deep details they produce (which allow them to make their roms and tools), they keep to themselves so they can run a profitable business, as it takes a lot of money to do the reverse engineering of this stuff. I plan to continue posting whatever I can about whatever I can learn from playing with the tables in the Tuner edition of UpRev, but I don't think that will lead to anything resembling an open source ECU for our cars. Mostly it's just to reduce duplication of effort figuring **** out. cutter likes this. __________________ 7AT Track Car! Journal thread / Car setup details

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