Re: IML: thermostats

[sosmi@xxxxxxxxxxx]

Nothing wrong with the fan blowing over the engine, since the air is always cooler than the surface temp of the engine. And it cools the 600-800 degree manifolds. Dave.

 

-------------- Original message --------------
From: PAUL WENTINK <randalpark@xxxxxxx>

> The fan should be blowing air into the radiator, not onto the engine.
>
> Paul W.
>
>
> -----Original Message-----
> From: mrs954@xxxxxxx
> To: mailing-list@xxxxxxxxxxxxxxxx
> Sent: Thu, 25 Oct 2007 3:06 am
> Subject: Re: IML: thermostats
>
>
>
> That's a very good understandable explanation. I just wonder whose
> idea it was to put the radiator in front of the engine so that the fan
> blows all that heat back onto the engine, where it came from??? :-)
>
> Â
>
> Mark
>
> Â
>
>
>
>
> -----Original Message-----
> From: Frederick Joslin
> To: mailing-list@xxxxxxxxxxxxxxxx
&g t; Sent: Wed, 24 Oct 2007 10:39 pm
> Subject: IML: thermostats
>
>
>
>
>
> I have to put my 2.5 cents (with inflation) about thermostats.
>
> A thermostat is designed to get an engine above the thermostat setting
> quickly and to keep it there. The radiator keeps the engine cool. This
> is not a function of the thermostat. If you have excess cooling
> capacity in the radiator, the engine should run close to the thermostat
> temperature. The thermostat keeps the temp above its set point and the
> radiator has the capacity to drop the temp below that point so it
> should cycle around the thermostat temp.Â
>
> However, if the engine puts out more heat than the radiator
> can transfer to the environment then the temperature will increase
> until the heat produced is balanced by the heat shed.
>
> Note that as the radiator gets hotter rela tive to the environment (air
> temp) the heat transfer becomes more effective since the rate of heat
> transfer is proportional to the temperature difference. Conversely as
> the air temp gets hotter (Arizona in the Summer) the effectiveness of
> the radiator decreases because the temperature difference is less.
>
> Heat is generated in the engine and is transferred to the coolant which
> is shed through the radiator. It is the temp in the engine that we care
> about and there are two transfer locations; the heads/block and the
> radiator. Really three locations since in the radiator the heat is
> transferred to the radiator metal which is then transferred to the air.
> All of the transfer locations need to work effectively for a good
> cooling system. If you have poor heat transfer in the heads/block to
> the coolant you risk pre-detonation and potentially other issues
> regardless of how well the other parts work. Â
>
> Â . Â Â Â Â Â Â
>
>
>
> Fred Joslin
>
>
>
>
> ------------------------------------------------------------
> Email and AIM finally together. You've gotta check out free AOL Mail!
>
>
>
> ________________________________________________________________________
> Email and AIM finally together. You've gotta check out free AOL Mail! -
> http://mail..aol.com
>
> ----------------- http://www.imperialclub.com -----------------
> This message was sent to you by the Imperial Mailing List. Please
> reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be
> shared with everyone. Private messages (and attachments) for the
> Administrators should be sent to iml.webmonster@xxxxxxxxx
> To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm
>