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Old 03-01-2017, 05:28 AM   #24 (permalink)
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Winsight - '00 Honda Insight
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Originally Posted by NHB View Post
Turbo has nothing to do with aggressive tune anymore. Here in Europe almost every model has a turbo. This includes plenty of eco models, MPVs and busses.

Turbocharging can increase or decrease MPG. If you use some home made installation, most like you will loose some fuel efficiency. Better turbo installations can improve FE. For example VW's new 1.5 TSI has a geometric compression ratio of 12.5 thanks to miller cycle, which would not be possible without high boost pressure. Turbo gives also good low end torque, which allows tall gearing.
Allow me to further strike the deceased horse. Home made kits are installed 99% of the time for power, so more aggressive tunes are used, because the install is done improperly. Definitely agree with the low end Torque/taller gearing statement though.

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