Date: Wed, 02 Feb 2005 04:48:14 +0000 From: Pooh Bear <rabbitsfriendsandrelationsnospamail.com> Subject: Re: Saab newbie
Valued Customer wrote: > > There's still something you're missing here. Turbochargers effectively raise > > the compression ratio when under boost, higher compression engines require > > higher octane ratings to prevent detonation due to heated air from the > > compression... > > Not missing anything and I think you failed elementary physics... I > understand a turbo charger is driven by exhaust gasses and those exhaust > gasses are indeed hot. But when a gas is compressed, any gas, it gets > colder by nature... not hotter! Errrr - NO ! For a simple practical example - use a bicycle pump to pump up a cycle tyre. You'll be surprised how hot the air gets. And the pump too. Graham
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