So I went to the dyno today,
always put Chevron Premium, and
only Chevron Premium in, pulled the fuses overnight at 600 miles, now have around 1600 miles.
Sat and cooled for about 30 minutes, and ran the first time.
Immediately ran a second time, dropped around 3hp.
Pulled both fuses, sat for 5 minutes, plugged them back in, ran a third time, hit 8hp more than the first run.
The fuse mod obviously doesnt fix a bad gas issue.
It resets the computer to run the way the
engine wants to run. Then as time goes by, the computer nags and nags the engine, until the engine is running the way the
computer wants it to run. Better for the powertrains health, better for emissions, better for fuel economy, poor for the driver.
According to the several dyno runs I've had, the computer is tuned to hit right around 11.5 air fuel ratio, for the whole WOT RPM band.
And to quote Wikipedia, "In naturally aspirated engines powered by octane, maximum power is frequently reached at AFRs ranging from 12.5 - 13.3:1"
Our computers are programmed to run rich, for reasons that us, as muscle car enthusiasts, do not like.
I think an aftermarket tune is the only way to get rid of this problem, and next dyno I do, will be with tuning!