[Fot] TR8 Water temperature

[Bill Babcock]

Well, you’ll need to get comfortable with a higher no-load temperature, because the radiator outlet temperature will be high. 

Two factors to consider: Heat, which is the amount of energy transferred, and temperature, which relates to heat transfer only in terms of the differential temperature. Slow speed means less mass flow and therefore less heat transfer but a higher differential temperature across the radiator, high speed means more heat transfer but less differential temperature across the radiator. 

> On Jul 10, 2016, at 2:54 PM, MadMarx <tr4racing at googlemail.com> wrote:
> 
> Hi Mordy,
>  
> there are two theories about cooling and water flow.
>  
> 1.      Slow speed of the water in the radiator to give the water time to cool. That means slowing down
> 2.      The other theory sais maximizing the flow, no restriction, high coolant speed.
>  
> In a way I prefer the 2nd way. And I’ll test this version in the coming weeks. I’ll remove the restrictors and see what happens.
>  
> Cheers
> Chris
>   <>
> Von: Mordy Dunst [mailto:gasket.works at gte.net <mailto:gasket.works at gte.net>] 
> Gesendet: Sonntag, 10. Juli 2016 22:45
> An: tr4racing at googlemail.com <mailto:tr4racing at googlemail.com>; van.mulders.marcel at telenet.be <mailto:van.mulders.marcel at telenet.be>
> Cc: fot at autox.team.net <mailto:fot at autox.team.net>
> Betreff: Re: [Fot] TR8 Water temperature
>  
> Chris your the engineer....
> 
> Heat produced vs heat removed.  There will be a steady state at some point.  You would like it lower.   Don"t underestimate the headgasket component of channeling coolant flow.  In the TR4 motor i made the coolant holes different than original to allow the mass flow of water to occur from the rear of the motor forward.   I also put a pressure gauge on my coolant.  If the pressure is too low it will not cool as efficiently either.  I don"t know what the coolant  dwell time with in the head needs to be to in order to adsorb the heat generated.  Nor the dwell time in the radiator.  There certainly calcs for all this stuff.  
>  
> MDunst
> Headgasket.com <http://headgasket.com/>
> 626.628.3777 F
> Triple R Munitions, Inc
> 626.201.9471 T
> FFL 6,7 SOT 2
> 
> 
>  
>  
> -----Original Message-----
> From: MadMarx <tr4racing at googlemail.com <mailto:tr4racing at googlemail.com>>
> To: 'Marcel Van Mulders' <van.mulders.marcel at telenet.be <mailto:van.mulders.marcel at telenet.be>>; 'MadMarx' <tr4racing at googlemail.com <mailto:tr4racing at googlemail.com>>
> Cc: fot <fot at autox.team.net <mailto:fot at autox.team.net>>
> Sent: Sat, Jul 9, 2016 8:21 pm
> Subject: Re: [Fot] TR8 Water temperature
> 
> I have a 160F thermostat installed.
> Next test will be without any restrictions, maximum flow and see how it goes with that.
>  
> Chris
>  
> Von: Marcel Van Mulders [mailto:van.mulders.marcel at telenet.be <mailto:van.mulders.marcel at telenet.be?>] 
> Gesendet: Samstag, 9. Juli 2016 13:01
> An: 'MadMarx' <tr4racing at googlemail.com <mailto:tr4racing at googlemail.com>>
> Cc: fot at autox.team.net <mailto:fot at autox.team.net>
> Betreff: RE: [Fot] TR8 Water temperature
>  
> My diesel BMW runs always at 100°C/212°F when hot. What coolant thermostat is in it? If the T° is steady at 212°F, perhaps it  is intentionally done so with a 212° thermostat.
> Marcel
>  
> Van: Fot [mailto:fot-bounces at autox.team.net <mailto:fot-bounces at autox.team.net>] Namens MadMarx
> Verzonden: donderdag 7 juli 2016 19:21
> Aan: 'FOT List'
> Onderwerp: [Fot] TR8 Water temperature
> Hi guys,
>  
> My TR8 is running way too hot about 212F at full speed and at idle the temps are getting that high also. I have no idea to get them down.
> Radiator core is 68x48cm x 5 cm. I suppose that should be enough. I've experiment with different restrictor plates with no change. Changing pump speed didn't help either. The difference between radiator in and outlet is 10°C (50F). Not enough I would say. Maybe making the pump more slower? It was running on a ratio of 0.8 slower than crank, currently 1:1 speed. Any ideas? 10 Liters are circulating.
>  
> Cheers
> Chris
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