engine/turbo theory question

[James Marriott]

----- Original Message -----
From: Lawrence C Leung <l.leung at juno.com>
To: <kris_j_hansen at yahoo.com>
Cc: <tquattroguy at yahoo.com>; <rdeis at io.com>;
<quattro at audifans.com>
Sent: Tuesday, October 17, 2000 2:46 PM
Subject: Re: engine/turbo theory question


> I think kris is right. Most of the energy for a turbo comes
from exhaust
> heat, the drag it entails in backpressure is considerably less
than the
> recovered heat energy. The concept of an external hydraulic
pump can't
> recover the otherwise lost thermal energy. Hence, you are using
more
> energy than you gain.

The turbo uses more energy than it gains, too; every machine
does. What the turbo, or any other forced induction device, does
is allow you to pump in more 19000 Btu/lb hydrocarbons.

cu, James Marriott
'87 4kq (alias "late-B2 90q"), 180k
'89 200q (MC1, Procon10/no bag), 126k
Boise, ID, USA     http://www.webpak.net/~marriott/