| enganear | 04-14-2008 02:49 PM |
Quote:
Originally Posted by Crossbow
(Post 17737)
Is this because effective exhaust scavenging can't occur because the turbo is sitting in the exhaust stream? (Unlike an NA engine, which would have headers trying to match up exhaust pulses for effective overlap and scavenging )
| You are complicating a discussion of heat with a discussion of pulses. Heat management has nothing to do with scavenging.
-Heat is energy.
-The turbocharger works by recovering energy from the exhaust and mechanically transferring it to the intake.
-The exhaust downstream of the turbo is much cooler than the exhaust ahead of the turbo because of the energy removed by the turbo.
-Insulating the exhaust downstream will have no positive effect of energy removed from the exhaust by the turbo. Cooler exhaust is more dense and can theoretically result in reduced backpressure, although I doubt seriously you could actually measure the difference in backpressure caused by insulating the pipe after the turbo.
-enganear | 