Hybrid_From_Hell Posted December 17, 2012 Share Posted December 17, 2012 ARRGH Think as I have I just cannot rememebr the - point where adding antifreeze reduces the cooling efficiency of the V* Up to this point more antifreeze = better cooling - over = Less Anyone recall this point pleease ? Nige Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted December 17, 2012 Share Posted December 17, 2012 Isn't it the concentration, not the degrees? As in, if you go 50/50 with water it works best, if you went 100% anti-freeze it'd be worse or even freeze up. It's not going to get that cold in Haslemere anyway Nige! Quote Link to comment Share on other sites More sharing options...
Retroanaconda Posted December 17, 2012 Share Posted December 17, 2012 I think the peak is around 65%. It's either that or 50%. For the UK at least 50% will be fine, and it's easy to work out! Quote Link to comment Share on other sites More sharing options...
Hybrid_From_Hell Posted December 17, 2012 Author Share Posted December 17, 2012 I am after the max to help -20 if garaged would be OK, but want the max help cooling !! I just can;t recall what it was ! Quote Link to comment Share on other sites More sharing options...
mikec Posted December 17, 2012 Share Posted December 17, 2012 Is this any help? http://www.challengers101.com/CoolantMix.html Quote Link to comment Share on other sites More sharing options...
mikec Posted December 17, 2012 Share Posted December 17, 2012 Is this any help? http://www.challengers101.com/CoolantMix.html Quote Link to comment Share on other sites More sharing options...
Tanuki Posted December 17, 2012 Share Posted December 17, 2012 I think it's something aroubd 65-70% Glycol, as other posters have said. Increasing the Glycol concentration also increases the boiling-point of the mix - up to around 75% Glycol. Back in my old days of rallying Ford Escorts a 75% glycol mix and a 16PSI radiator-cap would let your bulk-coolant-temperature go up to around 120 Centigrade without problems. Quote Link to comment Share on other sites More sharing options...
mark-d Posted December 17, 2012 Share Posted December 17, 2012 How i have always understood it; water has a better thermal transfer of heat than glycol, so in theory should be better than that with glycol added - glycol will raise the boiling temperature but shouldn't be an issue in a car with a pressurised coolant system anyway - glycol obviously has other benefits hence we use it. Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted December 18, 2012 Share Posted December 18, 2012 http://en.wikipedia....ene_glycol#Uses Looks like ~65% is about the best (-50c), 100% freezes at a mere -12c, no better than ~25%. 65% puts the (unpressurised) boiling point at ~112c. Quote Link to comment Share on other sites More sharing options...
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