I would guess that a 1:1 direct gear more closely approximates the direct
connection of an engine dyno. Also makes it easier to stay hooked up to the
rollers? Just guessing.
--- On Sat, 6/12/10, drmayf <drmayf@mayfco.com> wrote:
From: drmayf <drmayf@mayfco.com>
Subject: [Land-speed] Chassis Dyno Operations
To: "LSR" <land-speed@autox.team.net>
Date: Saturday, June 12, 2010, 7:46 AM
More fun dumb questions from me. Why do we use high gear during a chassis
dyno pull? The dyno does not know what gear the car is in, does it? Is there
a general limit on the acceleration rate of the rollers? If high gear (1:1 in
the gear box) is better than a lower gear, then would overdrive be better that
the 1:1 gear? Is there some final drive ratio that is best? Or is top speed
the consideration? And why does shifting during the pull matter? Are there
other considerations in how the pull is accomplished? Isn't the desire to get
tuning data for the enitre rpm range? Or should it be for reliability at peak
rpm?
anyhoo, just fun stuff before breakfast...
comments? thoughts? flames?
mayf
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