ClassJ
Powershifter
Hi guys...I have a mail order Brenspeed 93 octane with 10% ethanol tune in my 06. The car was running great for the past 2+ years with that tune but about a year ago NJ changed their fuel formulations.
One by one, various brands switched over and would ping slightly from 4000+ rpm at WOT. Shell was working great for me but they now reformulated a month ago or so and it too now pings. A bit of 100 octane unleaded generally fixes the problem.
Using the xcal 2, I pulled 2 degrees of timing from the 4000-8000 rpm group in the user defined settings.
The ping is gone on the 93, but now occasionally, the idle drops to about 450-500 and hunts for a bit before settling it. The overall idle seems to have dropped too.
I am going to flash it back to the std 93 tune, but would changing spark up top in the xcal effect idle?
Thanks
Nick
One by one, various brands switched over and would ping slightly from 4000+ rpm at WOT. Shell was working great for me but they now reformulated a month ago or so and it too now pings. A bit of 100 octane unleaded generally fixes the problem.
Using the xcal 2, I pulled 2 degrees of timing from the 4000-8000 rpm group in the user defined settings.
The ping is gone on the 93, but now occasionally, the idle drops to about 450-500 and hunts for a bit before settling it. The overall idle seems to have dropped too.
I am going to flash it back to the std 93 tune, but would changing spark up top in the xcal effect idle?
Thanks
Nick
