What would really be better is 100 % water in the cooling system. Water has a much higher latent heat capacity than antifreeze etc... I.e. it will carry more heat away than an antifreeze/water mix.
However, this may lead to over heating, antifreeze protects against this as well as freezing and, the lubrication of the water pump ! Water won't do this !
It may be worth bunging in just water and half a bottle of Redline Water Wetter and see how you get on ?! Just keep an eye on that temperature guage
Cheers
Paul