Data from drag strip

[Walter Sherwin]

>
> > Exhaust pressure tap?  How about a Snap-On exhaust back pressure gauge?
> The end of
> > the gauge screws into the O2 sensor hole, which won't be a problem since
> you're
> > testing WOT readings anyway.
> >
> > IIRC, the gauge is around $80, which is far less money than re-replacing
> mufflers
> > and other exhaust components, and is far more rewarding than guesswork.
> And it's
> > really kewl to cruise around watching the gauge.  Combine it with a
vacuum
> gauge
> > and a knock sensor amplifier for hours of fun!
> >
> > Shannen
> >
> >
>
>


Is there an ideal threshold for WOT exhaust backpressure which defines the
point at which attempting to reduce EBP further would yield very few gains
in a hot street car with a matching cam grind?  Has anyone ever seen a
rule of thumb correlation between EBP and lost HP?

Walt.





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