I am using Acura RDX 410cc injectors in my 2005 Miata with 1.8L VVT engine and running on Basic MS3 .The TunerStudio Injector Dead-time/PWM setting page is quite confusing, need some help in verify my settings.

It ask for dead time @13.2v a data point which I dont have so I have to calculate from the other data point I found online. Then on the graph it uses percentage of @13.2v I assume because on the graph 13.2 was not referenced? Then whats the difference between the " A(ms) " in top part of " MS3X Injectors " and the "BANK 1 Dead time @ 13.2V(ms) " bottom part of " Mainboard Injectors "

 

Bump for help

Also do I have to do @19.2v 0% reference in the table?

 

MS uses 13.2V as the "zero point", use maths and calculate what percentage the dead times are, at 10, 12, 14 and 16V and input those values into the table in the top left graph of your screenshot there. MS will interpolate the rest.

The "A ms" through "H" is just for different injector banks so you can tailor curves to each bank. Unless you are running a crazy staged injection setup with different injector types in each stage, ignore it all and just use the "main board" value with "curve 1" as indicated in your screen shot, which you will see, will fill in the "A" value if memory serves me correct.

 

Many thanks this was very helpful

 

Most likely you already know it, but just in case:
You attached RDX Injectors deadtimes@43.5psi, your car has differential pressure across injector at idle around 70psi.
Deadtimes@70psi are higher than deadtimes@43.5psi on 10-15%

 

I didn't know!

What adjustment do I need to set accordingly?

 

Multiply deadtimes on 1.15

1.224ms@13.2V@43.5psi -> 1.4076ms@13.2V@70psi

 

But I mean where do I put this setting? Its not on this Injector Dead-time/PWM setting page

 

43.5psi 70psi
V ms ms
8 2.5 2.875 204.25%
10 1.8 2.07 147.06%
12 1.41 1.6215 115.20%
13.2 1.224 1.4076 100.00%
14 1.1 1.265 90%
16 1.04 1.196 85%

 

I understand the calculation. But I dont see on the page how you can specify if it is 43.5psi or 70psi fuel pressure

 

You don't key it in. The point is that it is better to use the 70 psi data than the 43.5 psi data, and when the dead time is most important (low MAP) is where the differential pressure is approximately 70psi.

 

No place to specify it, you have to choose data according to your car fuel system pressure.

 

got it didnt know this car uses 70psi fuel pressure rather than 43.5psi

 

It doesn't. Differential pressure is different than static pressure.

 

Understood