givemethebighammer
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| posted on 22/9/04 at 01:01 PM |
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Nissan Micra rad recore - is this bloke right ?
I had my Nissan Micra radiator recored today. It came back with what looks like only one core in it (i.e.now half the width it originally was). I
questioned this and was told that the core was a new copper \ brass one which is more efficient than the original aluminium one, so it only needs one
core not two as the original ?
does this sound right ? Only I don't want to fit the thing and have to drain the system to take it back if it isn't.
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David Jenkins
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| posted on 22/9/04 at 01:16 PM |
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Copper/brass does conduct heat better than aluminium - but the difference is so marginal that it's irrelevant in this context.
You could ask him to provide written proof... 
David
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Hellfire
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| posted on 22/9/04 at 01:57 PM |
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quote:
Originally posted by David Jenkins
Copper/brass does conduct heat better than aluminium - but the difference is so marginal that it's irrelevant in this context.
You could ask him to provide written proof...
David
Unless he's graduated in thermodynamics and well versed in Specific Enthalpy values, the difference is marginal. However, if it's for a
BEC and racing - the weight is an obvious issue as Copper/Zinc (Brass (BS249 60/40) ratio)) are more than twice the weight of aluminium.
I somehow feel you've been stitched up...
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timf
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| posted on 22/9/04 at 02:07 PM |
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ask the bloke to supply you with writen assurances that any damages that his reduced core rad produces will be meet financally by him. then see how
quickly you get a double core rad back 
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NS Dev
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| posted on 22/9/04 at 05:06 PM |
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had this when I bought a recored rad for my old Opel Manta with 16v XE in it (200hp on throttle bodies).
The cooling was marginal on the original rad, but it was tired so got a recored exchange one and was assured over the phone it would be identical to
my own one, when I got it it had one bigger core instead of 2 smaller ones and the car got too hot!
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givemethebighammer
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| posted on 22/9/04 at 05:14 PM |
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I just spoke to the boss at the firm. He assured me that the core they have used is a high performance item equal to or better than the original core
in the radiator (regardless of the reduced thickness). He went on to say that the original nissan cores were no longer being manufactured and they
have fitted loads of the new type of cores without any issues. The core they have used is manufactured by a French company called NRF (apparently part
of the Modine group) and every design is thoroughly tested to ensure its heat transfer abilities. He seemed genuine and was definitely not a wide,
fast talking type.
So, if the radiator will still perform as the original did, I should have nothing to worry about. Just looks a little odd.
I'll see if I can post a picture later.
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DEAN C.
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| posted on 29/9/04 at 08:31 PM |
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I currently work for JCB and as part of a modification to help with cooling ,their latest radiators are larger core and are now made from aluminium
for more efficient cooling,and they are better.
Correct me if I'm wrong but is'nt ally a better conductor than copper not the other way round?
In my opinion ally rads always cool better,how many racing rads are copper,and I'm sure it's not just for weight.
Once I've finished a project why do I start another?
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