on 9/19/02 9:27 AM, Robert M. Lang at lang@isis.mit.edu wrote:
> On Tue, 17 Sep 2002, Peter Macholdt wrote:
>
>> Hugh,
>>
>> I just upgraded mine to a 4-row core. The old original is 3 rows and I do
>> believe that the higher capacity is allowing me to run cooler (haven't had
>> any 95+ days with the new unit, so can't do a proper comparison).
>
> Ummm. Sorry to be a contrarian on this. The original TR6 radiator is a
> two-row radiator. The "standard upgrade" is to go to a three-row setup.
My mistake, I have experience with only two TR250 radiators and they were
both 3 row before being recored.
>
>> My shop found a 4-row core that has the same fin count and is only slightly
>> thicker than stock.
>
> This may be true, I am not an expert on available radiator cores.
>
>> Looks original but cools better (I think).
>
> I can't speak to this. Keep in mind that you don't want the motor running
> too cool, too low a temp range is bad for the motor just as too high a
> temp range is bad for the motor.
>
The "I think" comment was meant to convey that the engine runs a bit cooler,
not tremendously so. If my experience is typical, the higher capacity
radiator still has the thermostat opening at running temps. I am now reading
1/3 while driving and 1/2 at idle in traffic (ambient temp 85-90 F). This is
compared to the 1/2 at idle and 3/4+ in traffic.
Peter
>> YMMV,
>> Peter
>> '68 TR250
>
> regards,
> rml
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