The fan fills the complete core, no way of fitting a bigger one, it is a Spal unit, do not think we get a better brand name in SA. It is also located in the middle of the motor.

Once the fan kicks in, the temp drops, it is the high way driving that is causing my problem, and this is were a fan is not needed.

Also installed a temp switch that switch on at 82 degrees and of at 68degrees last night, will check it out.

Gday
looking at the fan on the radiator , size wise and location of it, id say it looks rather inefficient, it could also be a faulty temp sender, id get a hand held thermometer (lazer type) and measure both , bottom and top hoses, and go from there.

The VDO Water Temp gauge is installed, just need to pickup a reducer from the A12 head to the Vdo temp sender.

This is not going to be that easy, otherwise I'll have to make something up.

The location of the heater hose should have only a minor effect. Don't worry about that.

The two main hoses are the same, obviously i don't have a heater in the racecar so there are no smaller hoses anywhere.

dat141, is your piping the same as mine.

Looks a lot like the setup I have in my car, same hose locations, crossflow radiator etc. I don't even have a fan on it anymore, so long as i don't sit there idling for too long the temp doesn't rise above 80 degrees C. Can't really see a problem, maybe put a temp gauge in the bottom hose to see if the radiators doing it's job.

Thx DD will do the test.

I bought myself a VDO temp gauge, just need to get it installed to see what temp the water is running at.

What is your thought regarding the way I did the pipes. Correct , Incorrect or other suggestion?

As a test, wire your electric fan to come on 100% of the time. Now what happens?
- Never gets over normal hot
- Same as before

cross flow rad not a top to bottom end tank design, think someone else had issues like that with heating up.

mines now opposite, cools great when moving but when pull up, starts to heat up,still below 100deg c on a coolish night(18degc ambient)