I come with a few question about the tune of my R33GTR.
First a quick history :
I bought the car with a few mods :
- R34 N1 turbocharger
- 660cc denso injector
- Greddy downpipe
- HKS 3" catback
- Aftermarket air pod
- Nistune ECU
- OEM MAF but seems to have been resealed !
- OEM intercooler
The car made 440hp at 1bar and 477hp at 1.3bar.

When I had a look around the car a few things were not perfect:
-Idle at 1700rpm
- The lambda wiring modification for the R33 to R32 ECU wasn't done
So for the idle I recoated the throttle body and I change all the intake manifold gasket. For the lambda I did the wiring modification.
The idle is now at 950 rpm and the lambda are working, not perfectly but it doesn't matter for the moment.
My issue is with the tune in the ECU.
As you can see in the file the Load scale haven't been modified and so the car can take around 150 of load value when all my map have a maximum of 88... So after 88 the ECU is taking the last column of my fuel and timing MAP which is the 88 Load column. This seems not a great way to tune an ECU...
The K factor have been modified but my MAF seems to be the OEM one since they are at 5 volt around 450hp. For me there ic no need to change the K factor if MAF are OEM especially with a Feature pack ECU.
The injector latency was not change either.
So my idea was to do a new tune, starting by :
-Taking OEM MAP "BNR32_RB26DETT_05U6F_MT_MECR282A_FP_maps"
- Change the injector size with smart adjustment
- Change injector latency to meet the 660cc Denso requirements
- Tune the fuel and timing map the meet the old AFR and timing level with the new tune.
I also have an issue with my car since the intake manifold job has been done :
When I open the throttle until I've got positive intake pressure and I close the throttle to change gear for example, I have a strong smeel of fuel in my car. have you ever experienced that? There is no smell when the car is running on negative intake pressure.
Thanks for your help
PS : I don't know how to attached my tune or running file, or picture in my post. Is there an explanation somewhere?
And sorry for my English, it's not my first language.