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Old 07-02-2022, 03:44 PM   #109 (permalink)
Blacktree
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Join Date: Dec 2011
Location: Florida
Posts: 258

The Prius Experiment - '07 Toyota Prius Base
90 day: 58.52 mpg (US)
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Quote:
Originally Posted by ps2fixer View Post
What's your source for the increase in fuel use?
...
Engines normally retard timing to prevent spark knock, that's how it's done on Toyota's at least.
Decades of experience has taught me these things. Typically, a boosted engine cuts spark timing under boost AND runs rich, to prevent knock. Because if you push your luck, you'll be replacing broken piston rings and/or fragged pistons.
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