That's very interesting. I suppose it may have something to do with
surface to volume ratio (the V being more compact). It surprises me,
though, since GM wasn't in the habit of making hot-running cars. But then
they had a lot more room for a big American-style radiator (in their big
American car).
Paul Hunt had this to say:
>The V8 outputs a lot more heat than the 4-cyl, which is why owners and
>converters are much exercised about how to get the heat out of the bay and
>cut RV8-style holes in the inner-wings and louvres in the bonnet. The V8
>maybe less stressed but since it turns in nearly 50% more fuel consumption
>that must mean about 50% more heat. Maybe I should also have said that
>whilst the V8 can comfortably maintain N whilst cruising it has more
>problems when stuck in traffic even with twin fans, whereas the 4-cyl shows
>no difficulties in either.
>
>PaulH.
>
>----- Original Message -----
>From: Max Heim <mvheim@studiolimage.com>
>To: MG List <mgs@autox.team.net>
>Sent: Wednesday, April 26, 2000 12:41 AM
>Subject: Re: (Paul) Shroud Question
>
>
>> Well, consider that your V8 is actually less "stressed" than the 4, with
>> considerably fewer HP per liter displacement (it's not rated 190HP, is
>> it? I thought not). This leads me to suspect it generates less heat per
>> liter as well, and one would expect the internal cooling capacity to be
>> proportionate to the displacement (rather than the specific output).
>>
>> But that's neither here nor there. I guess my main point would be, why go
>> to great lengths to run the engine at a lower than "normal" temperature
>> just because the weather could conceivably get hot? That seems to be what
>> is going on with changing to a 165 degree thermostat for the summer, and
>> the benefit is not apparent to me.
>>
>> But I think I've rattled on long enough on this subject...
>>
>>
>> Paul Hunt had this to say:
>>
>> >If the radiator cannot dissipate the heat of the engine then we are
>indeed
>> >in agreement. But I do find this surprising, since not even my factory
>V8
>> >suffers from that, while cruising, when the temps are in the 90s.
>> >
>> >Cheers,
>> >PaulH.
>> >
>>
>>
>> --
>>
>> Max Heim
>> '66 MGB GHN3L76149
>> If you're near Mountain View, CA,
>> it's the red one with the silver bootlid.
>>
>
>
--
Max Heim
'66 MGB GHN3L76149
If you're near Mountain View, CA,
it's the red one with the silver bootlid.
|