[Land-speed] Electric water pumps

[joseph lance]

Compression ratio is directly related to thermal efficiency--with a low cr 
of 5.4 it dumps a lot of heat into the water.

Lance

----- Original Message ----- 
From: "Ed Weldon" <23.weldon at comcast.net>
To: <neil at dbelltech.com>; "'Tom Bryant'" <saltracer at awwwsome.com>; "'LAND 
SPEED LIST'" <land-speed at autox.team.net>; "'Adin David'" 
<DavidAdin at mercydurango.org>
Sent: Thursday, February 14, 2008 8:16 PM
Subject: Re: [Land-speed] Electric water pumps


> Always an interesting subject.  I'd like to stick my fingers in here to 
> ask if
> anyone has some actual up to date data for modern engines on the heat loss 
> to
> coolant.  If you've messed around with engines on dynos a lot maybe you 
> can
> lend some insight.
> The data I have is from a chart in the 1944 edition of Obert and Jennings,
> Internal Combustion Engines, Analysis and Practice.  Test engine was an 8
> cylinder flathead somewhere around 280 cubic inches and 5.4:1 compression
> ratio.  Heat lost to "coolant", which included water as well as  radiation 
> and
> conduction from hot external surfaces ranged from 9.4% at 1000 rpm to 8.7% 
> at
> 3600 rpm.  Percentages are related to the total BTU content of the fuel
> consumed.  Kind of hard to extrapolate this to your "run of the mill" 
> 600hp
> small block.
> Any good data points out there?
> Ed Weldon
>
> ----- Original Message -----
> From: <neil at dbelltech.com>
> To: "'Tom Bryant'" <saltracer at awwwsome.com>; "'LAND SPEED LIST'"
> <land-speed at autox.team.net>; "'Adin David'" <DavidAdin at mercydurango.org>
> Sent: Thursday, February 14, 2008 4:22 PM
> Subject: Re: [Land-speed] Electric water pumps
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