went from 15.1/93.5 to a 14.39/96.5 with removal of center resonator...
03-20-2003, 06:20 AM
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went from 15.1/93.5 to a 14.39/96.5 with removal of center resonator...
on my A6 4.2. I ran both times with 1/4 tank. the 14.39/14.55/14.56 was with 2 gallons of 100 octane in the 1/4 tank.
The car has the stock ECU, and since it was too cold I didn't pull it to let it reset its timing memory.
How much of that improvement was octane related/resonator removal related (guesstimate will suffice). Both runs were at sealevel, both under 50 degrees outside.
The car has the stock ECU, and since it was too cold I didn't pull it to let it reset its timing memory.
How much of that improvement was octane related/resonator removal related (guesstimate will suffice). Both runs were at sealevel, both under 50 degrees outside.
03-20-2003, 12:47 PM
#5
it's best to datalog before and after. Timing probably improved slightly due to less knock seen by
the sensors but you have to really datalog it. Perhaps, all your car needs to run optimum is about 94-95 octane. Overdoing the octane as others points out would then start to make things worst as the car doesn't generate enough effective compression ratio to require a fuel that resist detonation, and the timing is not appropriately adjusted to ignite this slower igniting mixture (high octane)
Do a 3rd gear (tip mode for you) pull and log timing and rpm. Then go back to crappy gas and see if there is pull back. Experiment with mixing until you see peak.
Do a 3rd gear (tip mode for you) pull and log timing and rpm. Then go back to crappy gas and see if there is pull back. Experiment with mixing until you see peak.
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