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Owain,
Were there any other changes you made when swapping the radiator out?
Did you change the lower radiator hose? Does it have a spring in it to stop
it collapsing and restricting at higher rpm? That will cause issues at
speed but not idle
The gauge being mechanical rules out usual sender/ earth issues.
What depth is the core on the new rad v old one, maybe fan is to close to
the radiator and not pulling properly ( though that should more be an idle
issue than on the run )
What is the fin density and how many cores... Maybe its not getting as much
air passing cleanly through and not dissipating as well as the fluidyne.
Do you run an electric fan? I once had my car overheat as i had the wires
reversed and the fan was spinning reverse and pushing air away from the
grill whwn i came on... But again....more an issue at idle.
On Friday, 2 July 2021, Owain Lloyd <owain.lloyd@gmail.com> wrote:
> Fluidyne - right.
> indeed. there is no pressure increase at that temperature with Evans.
> you can literally remove the cap with your bare hand.
> the specific heat capacity isn't quite as good (it's hard to beat water
> after all), but the advantages in terms of lack of corrosion (and lack of
> expansion) are worth that for me.
> the point is that i ran Evans before with the Dale rad and it never ran
> that hot. it was running fine at the high temp (I drove it home at that
> temp - no problems - fueling perfect) but it reaches a point where you just
> don't want the engine too hot. iron block, aluminium heads and pistons -
> the hotter it gets the more the expansion differences will become.
>
> On Fri, Jul 2, 2021 at 12:23 PM michael king <michael.s.king@gmail.com>
> wrote:
>
>> Hey Owain,
>>
>> Not sure about the BMR, but the Dales ones were actually Fluidyne
>> radiators.
>>
>> The Griffin ones were a separate company and IIRC had the glued together
>> cores.
>>
>> I hear different things about evans.. one of the things i have heard is
>> that the coolant runs hotter, but that it doesn't boil, so i guess to ask:
>> Apart from it registering physically hotter, was it suffering any adverse
>> effects?
>> Did it start vaporising the fuel?
>> Did it start running rough?
>> Did it puke the coolant?
>>
>>
>>
>> On Fri, 2 Jul 2021 at 17:54, Owain Lloyd via Tigers <
>> tigers@autox.team.net> wrote:
>>
>>> Last year my Dale A (Griffin?) radiator cracked and I replaced it with
>>> this one from BMR in the UK:
>>>
>>> https://www.motorsportradiators.co.uk/store/Sunbeam-Tiger-Aluminium-
>>> Radiator-p146886570
>>>
>>> Not really used the car since except a couple of short trips.
>>>
>>> This week I was going to take the tiger out for a run over some mountain
>>> passes but after about 30 minutes, no traffic, it was running at well over
>>> 100C / ~230F. I returned home and checked everything over.
>>>
>>> 1. Full of fresh Evans waterless coolant.
>>> 2. gauge is mechanical
>>> 3. horn holes blocked, along with gap between rad and crossmember.
>>> 4. fan shroud in place with 13" flex fan on water pump hub.
>>> 5. doesn't overheat at idle even when left running for 30 minutes.
>>>
>>> I've NEVER had a problem with overheating at speed before. the only
>>> issues I had were at idle or in traffic / slow speed but even those had
>>> been solved by all the above. engine is a 490hp 347, but wasn't a problem
>>> before.
>>>
>>> everything is pointing at the BMR radiator just being a bit crap and not
>>> doing as good a job as the Dale rad. anyone running one of these?
>>>
>>> _______________________________________________
>>>
>>> tigers@autox.team.net
>>>
>>> Donate: http://www.team.net/donate.html
>>> Archive: http://www.team.net/pipermail/tigers
>>> http://autox.team.net/archive
>>>
>>> Unsubscribe: http://autox.team.net/mailman/
>>> options/tigers/michael.s.king@gmail.com
>>>
>>>
>>>
>>
>> --
>> Regards
>>
>> Michael King
>>
>
--
Regards
Michael King
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Owain,<div><br></div><div>Were there any other changes you made when swappi=
ng the radiator out?</div><div><br></div><div>Did you change the lower radi=
ator hose? Does it have a spring in it to stop it collapsing and restrictin=
g at higher rpm? That will cause issues at speed but not idle=C2=A0</div><d=
iv><br></div><div>The gauge being mechanical rules out usual sender/ earth =
issues.</div><div><br></div><div>What depth is the core on the new rad v ol=
d one, maybe fan is to close to the radiator and not pulling properly ( tho=
ugh that should more be an idle issue than on the run )=C2=A0</div><div><br=
></div><div>What is the fin density and how many cores... Maybe its not get=
ting as much air passing cleanly through and not dissipating as well as the=
fluidyne.</div><div><br></div><div>Do you run an electric fan? I once had =
my car overheat as i had the wires reversed and the fan was spinning revers=
e and pushing air away from the grill whwn i came on... But again....more a=
n issue at idle.<br><br>On Friday, 2 July 2021, Owain Lloyd <<a href=3D"=
mailto:owain.lloyd@gmail.com";>owain.lloyd@gmail.com</a>> wrote:<br><bloc=
kquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #cc=
c solid;padding-left:1ex"><div dir=3D"ltr">Fluidyne - right.<div>indeed.=C2=
=A0 there is no pressure increase at that temperature with Evans.=C2=A0 you=
can literally=C2=A0remove the cap with your bare hand.=C2=A0=C2=A0<div>the=
specific heat capacity isn't quite as good (it's hard to beat wate=
r after all), but the advantages in terms of lack of corrosion (and lack of=
expansion) are worth that for me.</div><div>the point is that i ran Evans =
before with the Dale rad and it never ran that hot.=C2=A0 it was running fi=
ne at the high temp (I drove it home at that temp - no problems - fueling p=
erfect) but it reaches a point where you just don't want the engine too=
hot.=C2=A0 iron=C2=A0block, aluminium heads and pistons - the hotter it ge=
ts the more the expansion differences will become.</div></div></div><br><di=
v class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Jul 2=
, 2021 at 12:23 PM michael king <<a href=3D"mailto:michael.s.king@gmail.=
com" target=3D"_blank">michael.s.king@gmail.com</a>> wrote:<br></div><bl=
ockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-lef=
t:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr">Hey Owain,<=
div><br><div>Not sure about the BMR, but the Dales ones were actually Fluid=
yne radiators.=C2=A0</div><div><br></div><div>The Griffin ones were a separ=
ate company and IIRC had the glued together cores.</div><div><br></div><div=
>I hear different things about evans.. one of the things i have heard=C2=A0=
is that the coolant runs hotter, but that it doesn't=C2=A0boil,=C2=A0so=
i guess to ask:</div><div>Apart from it registering physically hotter, was=
it suffering any adverse effects?</div><div>Did it start vaporising the fu=
el?</div><div>Did it start running rough?</div><div>Did it puke the coolant=
?</div><div><br></div><div><br></div></div></div><br><div class=3D"gmail_qu=
ote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, 2 Jul 2021 at 17:54, Owa=
in Lloyd via Tigers <<a href=3D"mailto:tigers@autox.team.net"; target=3D"=
_blank">tigers@autox.team.net</a>> wrote:<br></div><blockquote class=3D"=
gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(20=
4,204,204);padding-left:1ex"><div dir=3D"ltr">Last year my Dale A (Griffin?=
) radiator cracked and I replaced it with this one from BMR in the UK:<br>=
=C2=A0<br><a href=3D"https://www.motorsportradiators.co.uk/store/Sunbeam-Ti=
ger-Aluminium-Radiator-p146886570" target=3D"_blank">https://www.<wbr>motor=
sportradiators.co.uk/<wbr>store/Sunbeam-Tiger-Aluminium-<wbr>Radiator-p1468=
86570</a><br><br>Not really used the=C2=A0car since except a=C2=A0couple of=
short trips.<div><br>This week I was going to take the tiger out for a run=
over some mountain passes but after about 30 minutes, no traffic, it was r=
unning at well over 100C / ~230F.=C2=A0 I returned home and checked everyth=
ing over.<br><br>1. Full of fresh Evans waterless coolant. =C2=A0<br>2. gau=
ge is mechanical<br>3. horn holes blocked, along with gap between rad and c=
rossmember.<br>4. fan shroud in place with 13" flex fan on water pump =
hub.<br>5. doesn't overheat at idle even when left running for 30 minut=
es.<br><br>I've NEVER had a problem with overheating at speed before. =
=C2=A0the only issues I had were at idle=C2=A0or in traffic / slow speed bu=
t even those had been solved by all the above. =C2=A0engine is a 490hp 347,=
but wasn't a problem before.<br><br>everything is pointing at the BMR =
radiator just being a bit crap and not doing as good a job as the Dale rad.=
=C2=A0anyone running one of these?<br></div><div><br></div></div>
______________________________<wbr>_________________<br>
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Archive: <a href=3D"http://www.team.net/pipermail/tigers"; rel=3D"noreferrer=
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<br>
Unsubscribe: <a href=3D"http://autox.team.net/mailman/options/tigers/michae=
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<br>
<br>
</blockquote></div><br clear=3D"all"><div><br></div>-- <br><div dir=3D"ltr"=
>Regards<br><br>Michael King</div>
</blockquote></div>
</blockquote></div><br><br>-- <br>Regards<br><br>Michael King<br>
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