Nistune Forums

Hi have an R33 Skyline running on an RB20 ecu. I have a hypergear ATR28G4 turbo approx 520hp capable running with standard afm and standard injectors.

I am currently working to get the tune running the best i can with the most power i can with the limited afm and fuel system looking for approx 300hp at the wheels
Currently I am hitting the last load column at approx 4400rpm, basically i need some help/guidance on modifying the fuel and Ign load scales.
What is the best/smoothest way to do this? Will changing these values also change the fueling to suit? or will i have to richen up the changed columns and slowly bring the afr to what I want to run at?

Any one car to share what that have changed the values to?

Im guessing you only want to change the last few rows too keep the car drivable off boost? Or can you stretch it out over the whole map?

Work out what your TP is maxing out to in your log files

Then use that as the basis for the max TP on the last column

You will need to then smooth across the map and adjust accordingly

More info in here:
http://www.plmsdevelopments.com/files/n ... basics.pdf

But how do you 'smooth' this scaler?

Do you simply connect the dots so it looks nice and neat or is there a proper way to do this?

Cheers,

Andrew

I've done it 2 different ways. First was like you said - increase values in just the high load columns. So it's a straight line that tips steeply upwards on the end.

Second was to get the last column where I wanted and then adjust all the other values to get a straight line.

Either way works fine. The important part is that you need to do this up front cos it obviously affects how the maps are accessed.

These days I like to either keep the load values pretty close to a straight line or even flatten it out in the boosted area. Reasoning being that this gives you better resolution across different boost levels. I found that often the load columns accessed would hardly change between say 12psi boost and 14psi. But timing values necessary at different boost levels can change quite a bit. By flattening the load scale values I get different columns accessed at different boost levels.

PL