By reducing back pressure, exhaust gases flow freer allowing for intake to
fill the cylinder quicker yet without increased fuel flow... a.k.a. amount.
Bill Miller wrote:
> I'm not sure I agree, This is at the back of the exhaust system. Nowhere
> near the intake. Four holes in the exit side of each muffler. How could
> this lean out the mixture?? Exhaust is blowing out these holes, air is not
> being sucked in. If this is leaning it out, how? I don't want to burn a
> valve if it is in fact leaning it out.
> >> It's backfiring because you're running much more air through it and
> >> it's going lean. Do this at your own risk.
> >> Best regards,
> >> fooshst mailto:email@example.com