Welcome to the SR20 Community Forum - The Dash.
Register
SR20 forum logo

Thread: Calum R/T ECU and Nistune software question

+ Reply To Thread
Posts: 11-20 of 86
2012-10-15 18:51:24
#11
Originally Posted by Vadim
Nooo NEMU or go home


Absolutely! I look forward to one day running a NEMU RT. Unfortunately, unless I make my B15 a track only car, I will need to keep it OBD2 for emissions reasons. I am hoping there will be an OBD2 RT option by spring/summer time of next year.
2012-10-15 20:27:34
#12
Originally Posted by Vadim
Originally Posted by BlueRB240
The nistune bin will work with tuner pro.


Bin is the same (or rather they both can use same bin files). But Nistune it self might not recognize or like Calum chip.

What he might have to do is, make changes with Nistune but upload it with TunerPro or a standalone upload utility (there is a little one that TunerPro offers).


Nooo NEMU or go home


No I could use Nistune to upload to the Calum RT board but I don't feel like loading the drivers on my laptop for it.
2012-10-16 23:24:41
#13
Okay, you guys have a lot of good points. The computer I was using does not have the drivers on it, BUT it would recognize the Calum ECU just fine through the Consult port. I could download the .bin that is currently on the ECU and even make changes to it with Nistune, like change k value etc. When I tried to 'burn' the modified .bin file to the ECU it would just come up with an error telling me that the modified .bin could not be 'burned' to the ECU.

I did try to use the USB cable connected to the back of the ECU, but Nistune wouldn't recognize it. Only when I was using the Consult cable would Nistune communicate with the Calum ECU. I guess the next thing I'm going to try will be what lynchfourtwenty suggested about uploading the image to ECU. If that doesn't work I will try getting drivers. I will report back with some info as soon as I can borrow my friends laptop with Nistune again.
2012-10-17 00:18:51
#14
SR20? if you go to the nistune sight it and download the docs it will tell you how to use it with nistune. The drivers needs to be loaded tho and any changes need to be done with the USB cable. good luck.
2012-10-17 00:21:52
#15
Sounds to me like I might as well just get Nemu/Tunercode or whatever the hell its called. Calum R/T is nice but there is no support or software. Its just outdated crap now.
2012-10-17 01:23:17
#16
First Calum RT ECU's do not work through consult ports. Second you need Calum drivers. Third Nemu is the way to go if you want a lot more tunability, but I suggest you try to make work what you have first.
2012-10-17 01:30:00
#17
I found a stock U13 bin and I'm trying to mod it for my setup. I'm looking at your VQ Table Spreadsheet and I was wondering, what is the difference between the Z32 OEM table and the Z32 Calum table? If I'm swapping the VQ table on this stock U13 bin, would I use the Z32 Calum table? Then after I modify the VQ Table, what is the formula for the K value? And what do I need to change on the TP scale?

And what is the "feedback control flag"?
Last edited by SR20? on 2012-10-17 at 01-46-15.
2012-10-17 01:52:01
#18
Originally Posted by Vadim
First Calum RT ECU's do not work through consult ports. Second you need Calum drivers. Third Nemu is the way to go if you want a lot more tunability, but I suggest you try to make work what you have first.


If he can afford it might as well get the Nemu since it's a rapier vs the broadsword that Nistune is.
2012-10-17 01:55:49
#19
Well, I've kind of given up on Nistune. Just going to try my best with Tunerpro R/T and see what happens. If I can't get any help, I might just get the Nemu since it seems to be the popular thing now with lots of support.
2012-10-17 02:37:43
#20
Originally Posted by From
K Value

This calculation is based on a simple ratio of old vs new for both injectors and airflow meter. For example if the stock K value is 34,275 and injector size was changed from 370cc to 550cc then the new value will be 21,475 x (370/550) = 14,447. Bigger injectors require a smaller K value.

Same deal with airflow meters except we use maximum horsepower figures to do the calculation. For example it is taken that a standard SR20 airflow meter gives its maximum reading at around 290hp. If we fit a Z32 airflow meter, which has a max HP rating of 550hp then the calculation is 21,475 (standard K value) x (550/290) = 40,728.

If you change both injectors AND airflow meter you need to do both of the above calculations: 21,475 x (370/550) x (550/290) = 27,400. Experience has shown that changing to a larger AFM and injectors at the same time is a recipe for success because one increases K Constant and the other decreases it. A K Constant that finishes close to the std value will always make tuning easier.

These are only rough calculations to get things “in the ball park”.


I was reading this off of Nistune's website and was wondering where the hell 21,475 came from? I'm confused on how it went from 34,275 to 21,475. Can someone explain this?

http://www.plmsdevelopments.com/files/nissan_ecu_tuning_basics.pdf
Last edited by SR20? on 2012-10-17 at 02-38-33.
+ Reply To Thread
  • [Type to search users.]
  • Quick Reply
    Thread Information
    There are currently ? users browsing this thread. (? members & ? guests)
    StubUserName

    Back to top