The Dyno Dip

[Matt Davis]

Jon Pennington said:

> A highport motor has a similar high-slope
> climb as the RPMs head for 4000, but lowports and rollers seem to hit
> some sort of a weird turbulent harmonic *or* something is going nutty at
> the
> ECU/emissions system that causes a DIP at a similar but later part.

I recall before i installed my resonator that there was a high pitch
tinging in that range..  is it possible that the resonance along with the
lean conditions could be pinging the engine?

#56 STS Matt Davis
2001 Inferno Nissan Sentra SE w/performance package
www.b15sentra.net www.NENOC.org www.sr20forum.com