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Re: Cap'n, #5 is down, 'n I can't hold 'er any longer!
Christopher Hanlon wrote:
>Perhaps the last cylinder is run the leanest for some reason (intake runners
>wrong (allowing for too much air to the 5 cylinder)
On a naturally aspirated I-5, the throttle body and first intake runner are
closest to the #5 cylinder. On the turbo cars, these are closest to the #1
Has anyone noticed whether the #1 cylinder on the N/A cars tends to run
lean(er) than the others at WOT?
In other words, does the cylinder closest to the throttle body tend to run
richer than the one at the other end of the intake manifold at high RPM? It
sounds counterintuitive to me at first glance, maybe there's nothing to it at
all. But I'm thinking that perhaps at WOT, when the intake air is moving at
a high average velocity _and_ has a high relative density, the air's inertia
is causing the cylinder closest to the throttle body to run richer than the
others because more of the intake air just flows right past that that intake