[400TT]

When have you noticed the overheating problems?

I'm currently fitting an aluminium radiator to my RMC. I have just used an AFCO and got a few mods done to it. Cheapest solution for me and the AFCO radiators are great quality. Sorry can't tell you yet how much difference temperature wise it has made. I have stuck with it leaning forward as it was easier.

Aluminium radiators are much more efficient to start with, so you will gain cooling efficiency by changing.

Can you gain any by getting you aluminium radiator made larger than the old copper, i.e. was your copper radiator sized well for the space.

What type & brand of thermo fan are you running?

Had you sealed around the edges of the radiator i.e. the gap between radiator & body.

Do you run a rubber seal on your bonnet opening?

The GT40's also suffer badly from overheating problems. Some of the guys are running different water additives resulting in increased cooling efficiency. I'll see if I can find out what they are.