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 Post subject: JECs / Nismo 720 CC Side Feed Injector Settings
PostPosted: Fri Oct 17, 2008 9:28 am 
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RomRaider Developer

Joined: Tue Jul 11, 2006 9:25 pm
Posts: 1025
I got some of this from Wolf Player on IWSTI. I've spent a few months dialing in my own values, and got to the same settings (or close enough). Here are his proposed values that work quite well. Be sure to note the rescaled axis values in the Tipin table.

For those with old defs, multiply the tip in (ms) values by 1000.

Pertinent mods:
- AEM CAI, stock diameter, with minimal maf changes. These values should still work well with stock intakes.

Caveats:
- Though my IAM never drops, I do get mis fires on all cylinder of counts (1-2) when doing rapid throttle changes at very low RPMs. I have to try to do this, but it is reproducable. I believe that its further tip-in issues. I'll keep at it over the next few months. But please note the following values do work very well.

- For those wanting to derive their own tipin values, note that because these injectors are from a totally different manufacturer and not like most other hacked stockers, tipin isn't just the base ROM tipin values multiplied by the % change in scalar from stock. The entire slope of the line is drastically different. Low % throttle values require more change than higher ones.

- I'm having occasional idle oscillation / hunting problems I'm trying to fix.

Post up any better tipin values if you have them.

Raw data for cut and pasters:

Scale:
Code:
731


Min Tip-in Enrichment activation: This value is usually 1/1000 less than the value corresponding to the 10% column in the main tip in table.
Code:
1.51


Tip in enrichment activation: Set this too low and tip in ruins low RPM. Take for example starting from a complete stop in 1st. Too low and you'll stall.
Code:
1.0


Latency:
Code:
Axis(v)    Data (ms)
6            3
9            1.52
12           0.8
14           0.54
16           0.42


Tip In
Code:
Throttle (%)    Add pulse (ms)
0.0                 0.532
0.2                 0.552
0.4                 0.572
0.7                 0.592
1.0                 0.624
1.3                 0.664
1.6                 0.684
2.0                 0.724
3.0                 0.824
4.0                 0.884
6.0                 0.984
8.0                 1.072
10.0                1.152
12.5                1.264
15.0                1.364
20.0                1.564
25.0                1.772
30.0                1.972


Tip In Enrichment Comp Coolant Temp
Code:
Degrees (F)    Comp (%)
-40               79.68
-22               70.56
-4.0              62.16
14                 53.76
32                 44.63
50                 36.47
68                 28.55
86                 21.35
104               15.11
122               9.35
140               5.52
158               1.92
176               0.0
194               0.0
212               0.0
230               0.0

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