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I read about how PSA is improving its 1.6 HDi turbodiesel by increasing the bore and shortening the stroke. This keeps the displacement, but reduces the surface area through which heat can be lost. The larger bore also allows slightly larger valves, which reduces pumping losses. I have no idea how much this helps FE, my guess is barely.
Cooled EGR and an intake restriction to help suck more EGR have been standard for years.
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is where you're going, not how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread
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