Kees,
Joe is talking about his ex works big Healey, the 1965 Sebring 3000
car as driven by Paul Hawkins.
I'm glad Joe hasn't "Modified" it back to standard BJ8 specs. It is
still in the original mechanical form it left the DHMC.........
;-)
Sent from my iPhone
On 02/08/2010, at 1:52 AM, Oudesluys <coudesluijs@chello.nl> wrote:
> You may have access to 197BHP but do you ever use the car in anger and
> exploit that power for prolonged periods?
> Kees Oudesluijs
>
>
> Joe and Lenore Armour wrote:
>> Oudesluys wrote:
>>
>>> What is disregarded completely in this discussion that a lot of
>>> people run modified (much) more powerful than standard engines and
>>> have the standard radiator without extra cooling ca[pacity and/or a
>>> proper electric fan. Of course you would create overheating that
>>> way.
>>> Kees Oudesluijs
>>> NL
>>>
>>>
>>
>> FWIW, I have a 197BHP at the back of the gearboxof my Healey 3000
>> with a standard radiator with sealing plates across the top and
>> bottom
>> of the core and side vertical panels with ONLY one half of the the
>> standard fan ( one blade of the two) and no electric fan. During
>> summer in Australia it has never boiled. Also has Webers and a
>> tubular
>> exhaust manifold. The only difference to most of the listed
>> discussion todate is I have an alloy head.
>>
>> Some of the experts out there will no doubt be able to explain that
>> the rate of heat transfer is most important in any heat exchange
>> system and this happens between combustion chamber : head material :
>> water to remove the heat and then again in reverse in the radiator
>> matrix, water : copper : air. All of these items/materials affect
>> the cooling system.
>>
>> Surface condition of cast iron has a BIG affect on the rate of
>> transfer of heat from the combustion chamber. Iron oxide
>> ( rust,scale)
>> limits the transfer of heat into the water significantly.
>>
>> Also have a close look at exactly how far down the height of the
>> block
>> the actual water jacket around the bores does go. This area within
>> the block/bores is notorious for becoming jam packed with crud (
>> technical term to describe all sorts of foreign matter) and this
>> decreases the surface area of the hot bits from being exposed to a
>> good water flow and therefore heat removal.. Same principal with a
>> dirty radiator.
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