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 Post subject: Which radiators?
PostPosted: Sat Mar 14, 2015 8:00 am 
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998cc
998cc

Joined: Wed Jul 13, 2005 5:26 pm
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Location: Sydney
I hope these are simple questions about radiators. I need to ID my radiator. I have a deluxe with an 1100 fitted.

Are the rads used the same and if not how do I determine a difference?

I'm looking to go with GRs small bore project and need to know if the radiator handle 100hp or should I upgrade?

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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 1:54 pm 
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Location: Under the bonnet son!
I can't speak on the kind of radiator you will want for 100HP or greater, but it will want to be tip-top.

The radiators for the Deluxe and Mini K 1100 was the same through to Clubman. Also identical for the 1275 Cooper S. There was plenty of capacity in them when kept clean and in good shape.

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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 2:52 pm 
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998cc
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Is it worth pressure testing and cleaning or just get an aluminium ebay special?

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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 3:42 pm 
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848cc
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Copper is a better conductor.

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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 4:22 pm 
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998cc
998cc

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So the originals have a copper core?

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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 4:31 pm 
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848cc
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you bet.

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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 4:47 pm 
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SooperDooperMiniCooper ExpertEngineering
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Location: Under the bonnet son!
If its a special engine, then it would have to be a pretty special radiator. Might be worth spending a little extra on the radiator. I like my copper radiator, it suits my use and will work for a warm 1275 on 40+ days just fine.

There's nothing wrong with a new alloy radiator either, with the option of putting a thermofan switch on as part of the deal. You can get deeper four core rads for a little more capacity as well. The eBay alloy rads are pretty good by all accounts, but there are some good Oz made radiators as well.

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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 7:11 pm 
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I have around 125 HP at the crank, am running a recond Mini K/Cooper S rad with a Minimatic freshair heater (these have no water tap and act as an aux rad). It never gets hot even in 42C heat.
If you are concerned, add a Clubby heater core as an aux rad, behind the grille, near the dizzy.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 7:38 pm 
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998cc
998cc

Joined: Fri Aug 30, 2013 8:59 pm
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Location: Western Sydney
Excuse my ignorance but !
Regardless of the potential HP of your engine, at a steady state on the freeway you only need X (say 40) HP.
So unless you are constantly using all of the available HP a standard radiator should be OK :|

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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 9:19 pm 
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998cc
998cc

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Pressure test and flush it is. It also needs a Respray. Can you use any high temperature spray paint?

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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 9:49 pm 
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Yes.
Don't make it too thick... just a mist on the core.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:


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 Post subject: Re: Which radiators?
PostPosted: Sat Mar 14, 2015 10:00 pm 
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998cc
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Joined: Wed Jul 13, 2005 5:26 pm
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Location: Sydney
Will do

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