Thread: Scaling TP load points for Q45 MAF on SR20VE?

Hi team. Wondering which is the most effective way to work out the load points for a Q45 MAF with 370cc injectors?

Has any one had any experience and success with this on a NEMU?

many thanks in advance.

What kind of ECU are you running now?

It is possible to log TP with a calum basic board installed on the ECU and also nissan data scan for data logging through your consult port
if you are OBD 1 this will help you http://www.sr20forum.com/realtime-ecu-support/238021-how-add-tp-streaming-b13-s13-etc-ecus.html
if you are OBD 2 this will help you http://www.sr20-forum.com/ecm-tuning/31809-how-datalog-tp-nissan-data-scan-b14-s.html

People are having great success with the NEMU

NEMU in a B13, from memory. Runs in a P11 chassis, if that helps?

I have zero experience with the NEMU. Hopefully someone can chime in and help you out.

You will have to log to find your max TP, then re-scale your maps to accommodate. Make sure you have the correct MAF selected so your K values are not all crazy.

Since TP is a theoretical number that changes greatly with a different MAF. If I'm creating a tune form scratch I will setup a decent range of TP load. Like low load of 10 and high load of 150. Then take it for a quick spin, and see where you are load wise while cruising, find what TP my 0psi is at, and make sure to not run too much time, and run rich at that TP and higher. Then I will do a WOT run and see how far my max TP goes. If it goes above 150, then I rescale the load to 200. Keep on doing this until you get a pretty consistent map that is linear.

Keep in mind it's not a good idea to run off the map, make sure your highest TP column is a good bit higher then your maximum actual TP.

NEMU RT is no different then regular Nissan ECU tuning (TP scale wise). NEMU SA with MAF is very similar too. This means this advice will work for all of the above.

If you would like I can provide you with a base calibration for the Q45 MAF.

Shoot me an email or message with which software you are using and I can get it over to you.

Great post

How do I know I'm at 0psi?

You need a boost gauge for this

Connected to any vacuum line?