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Richard930 Richard930 is offline
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Join Date: Feb 2010
Location: Toronto
Posts: 323
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Jsveb - not sure if you're a pilot as well (I am) but it seems you've nicely described the effect of temperature and pressure on engine performance. I've not taken the time (nor do I have the inclination!) to determine the real effect on our engines, but my butt dyno (and others too it seems) confirms that there is a significant change in performance that our "other" cars do not benefit from. Presumably that's because modern sophisticated engine management systems are able to optimise performance for a wider range of conditions which our prehistoric CIS systems cannot do, which makes it that much more noticeable.

.2 difference in AFRs - interesting. I wonder at what temps we need to get concerned about going too lean, assuming we're still thrashing our cars when it gets really cold?
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Richard
1982 930, K27-7200, Ruf wheels, Leask WUR, Tial WG, WEGO IV AFR, RarlyL8 headers & single out muffler, TK I/C
2011 R350 winter beater
2004 BMW R1100S
Old 11-06-2011, 04:30 PM
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