Boosted2.0 |
07-04-2012 12:44 PM |
Quote:
Originally Posted by Visconti
(Post 295778)
Just saw this!
Thanks for posting this up.
I think the gain is most likely from the advance multiplier increasing allowing the car to run more timing.
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I suspect it is a combination of things.
First, I only run shell and chevron 93 octane, so it is likely that the motor is not having to pull any timing for knock response. Toyota's ECUs actually start at Maximum timing, and then they use a long term and short term knock trim to pull timing back out to the currently desired level. You can reset this value by resetting the ecu (disconeccting the battery). Those values both exist in the FRS ECU when viewed with a Toyota Techstream scantool, so I suspect it is the same as the rest in that respect. Now there MAY have been some fuel related timing reduction for the first pull, but it did have 93 in the tank from an Exxon station across from the dealer.
And a good deal of it is from break in. We actually felt a huge difference after we took it to the drag strip at @300 miles or so. We made over 16 runs, and about the first 12 were literally back to back. The next day there was a definite increase in power. I have also seen a corresponding increase in fuel economy even when driving hard.
It should be noted the ambient temps were warmer on the more recent pulls as well.
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