I'll answer best as I can
1. 18 degrees timing advance is phenomenal and I have hit that a few times. However I am usually at 12-15. What you want is a steady climb of overall advancement. The higher the boost the lower the advancement generally. It also seems temperature in regards to IAT and...
The outside temp was right at 90 degrees Fahrenheit. I had been driving for a about 5 miles, mostly moving, a couple stops at traffic lights. If I had been sitting still or driving it hard I'm sure the IAT's would have been higher. But no doubt that the R pipe moves the exhaust gas better than...
To connect the R pipe I bought a few reducer/adapter sleeves, 2.25-2.5 inch, ID and OD, but none worked. The R pipe is 65mm and stock is 60mm. So I cut one of the sleeves lengthwise and slid it over the stock exhaust. Then bought a oem R 65mm clamp. It worked perfect but it would have been...
The IS12 definitely runs out of steam at the higher rpm, but still it pulled much better with the R pipe than stock pipe.
My only mods are air filter, jb4 and r downpipe.
Here's a log not the best but all I have for now. 93 octane 90f R downpipe.
https://datazap.me/u/vduballtrack/90f-r-downpipe?log=0&data=1-3-4-11-15-18-25-26-27-28
The screenshot is the current setting for the above log.
Compared to this log with roughly the same Jb4 settings. Stock downpipe 93...