A noob tuning his own car (Calum RT)
Well guys, I will start this thread so I can receive help and provide help if possible, just wanted to share my experience with this great ECU and maybe it will be useful to other noobs like me lol. I will keep updating the thread as soon as I progress with the tune.
Some weeks ago I got a Calum Realtime knowing that it was no easy job for someone that was used to do just small changes on a emanage blue.
A quick view on my setup:
Built SR20VET
Stock cams
Tubular manifold
MP T60 .63ar turbine stage 3
740cc DW injectors
Z32 MAF
Walbro 255
Nismo FPR
Calum RT ECU
Getting the ECU ready
First thing after getting the Calum out of the box is to read this thread and follow carefully each of the steps: Realtime ECU Quick Start Manual - SR20 Forum
After setting up the TunerPro RT and loading the XDF file (This file defines all the parameters that can be changed on the ECU) I loaded a .bin file from a Mine's ECU (.bin file is the one loaded on any Nissan ECU it has all the parameters to make it work) it was set for Z32 MAF (good) and 555cc injectors (bad) so searching on the forums, I found this post by calum that helped me out:
Based on that formula, and since the base .bin file I used was properly configured for a Z32 MAF I just had to change the K value to one suited for my injectors, it came up to a value of 30.000, but I used 29.000 since my fuel pressure is a bit higher than stock right now. Loaded the file on the ECU, and it started perfectly!! AFR's kinda lost at cold idle but it was because of a IACV problem (posted on this forum section also). I went for a ride and checked the AFR's on partial throttle and full throttle, and they were a bit too lean on WOT and rich at partial throttle, so I decided to just stop the car until I know how to mess with the fuel map.
Launch Control
When I opened up Tuner Pro RT and loaded XDF and .bin files, I took a look and I didn’t understand most of what was in front of me. So I decided to keep reading stuff on the forums and then I found this guys talking about launch control!!! Hell yeah, I want that on my car!! After searching a bit I found this thread:
B13 bin with launch control - SR20 Forum
Apparently the .bin file needs to match and be made specifically for that Launch control XDF, but that thread didn’t really had a .bin file I could use so I searched some more and found a .bin file (launch control enabled!) that could be useful for my setup here:
Need bin for b13 with bluebird 370cc and z32 - SR20 Forum
So I set the launch limiter to 4200rpm, and the launch speed to 6mph, went for a test drive and it worked perfectly!, it bogged a little because of the big turbo but its amazing, I have launch control now! Too bad the car is not tuned yet
More to come
Some weeks ago I got a Calum Realtime knowing that it was no easy job for someone that was used to do just small changes on a emanage blue.
A quick view on my setup:
Built SR20VET
Stock cams
Tubular manifold
MP T60 .63ar turbine stage 3
740cc DW injectors
Z32 MAF
Walbro 255
Nismo FPR
Calum RT ECU
Getting the ECU ready
First thing after getting the Calum out of the box is to read this thread and follow carefully each of the steps: Realtime ECU Quick Start Manual - SR20 Forum
After setting up the TunerPro RT and loading the XDF file (This file defines all the parameters that can be changed on the ECU) I loaded a .bin file from a Mine's ECU (.bin file is the one loaded on any Nissan ECU it has all the parameters to make it work) it was set for Z32 MAF (good) and 555cc injectors (bad) so searching on the forums, I found this post by calum that helped me out:
Originally Posted by Calum
I've never worked with those injectors.
You can compute a ballpark k-value from a known program using the same maf (and type of ECU, B13 or B14):
new k-value = (old injector size)/(new injector size) * (old k value)
So for example if you use the Mine's 550 Z32 maf bin on this page (they probably have the k value correct)-
SR20 binaries
And assume that your injectors at 4 bar flow (550 * 1.15) = 633
So-
new k value = (550/633)*40387
new k value = 35091
I've never worked with those injectors.
You can compute a ballpark k-value from a known program using the same maf (and type of ECU, B13 or B14):
new k-value = (old injector size)/(new injector size) * (old k value)
So for example if you use the Mine's 550 Z32 maf bin on this page (they probably have the k value correct)-
SR20 binaries
And assume that your injectors at 4 bar flow (550 * 1.15) = 633
So-
new k value = (550/633)*40387
new k value = 35091
Based on that formula, and since the base .bin file I used was properly configured for a Z32 MAF I just had to change the K value to one suited for my injectors, it came up to a value of 30.000, but I used 29.000 since my fuel pressure is a bit higher than stock right now. Loaded the file on the ECU, and it started perfectly!! AFR's kinda lost at cold idle but it was because of a IACV problem (posted on this forum section also). I went for a ride and checked the AFR's on partial throttle and full throttle, and they were a bit too lean on WOT and rich at partial throttle, so I decided to just stop the car until I know how to mess with the fuel map.
Launch Control
When I opened up Tuner Pro RT and loaded XDF and .bin files, I took a look and I didn’t understand most of what was in front of me. So I decided to keep reading stuff on the forums and then I found this guys talking about launch control!!! Hell yeah, I want that on my car!! After searching a bit I found this thread:
B13 bin with launch control - SR20 Forum
Apparently the .bin file needs to match and be made specifically for that Launch control XDF, but that thread didn’t really had a .bin file I could use so I searched some more and found a .bin file (launch control enabled!) that could be useful for my setup here:
Need bin for b13 with bluebird 370cc and z32 - SR20 Forum
So I set the launch limiter to 4200rpm, and the launch speed to 6mph, went for a test drive and it worked perfectly!, it bogged a little because of the big turbo but its amazing, I have launch control now! Too bad the car is not tuned yet
More to come
Last edited by Bagato
on 2011-04-17
at 17-31-03.
Reason: Thanks Vadim for the heads up on the K value calculation, fixed.