[TUF-427]

Its All about surface area,

A 16inch thermo bolted to an average size radiator would probably only cover 50 -60% of the available fin area,

Thats why a correctly designed shroud works so well as it will pull air thru 100% of the fins with a decent enough fan.

I only use a Davies Craig 16in rated at 2200cfm and never had any real problems,
originally used a 3 row brass radiator and are now using a two row alloy radiator with the same fan bolted straight on.
The alloy radiator definatly better for keeping the car cool on the track..

I have seen some of the cheaper brands of fan are the same size with half the cfm rating so may be worth a look what your using.

I also have to defend DRB here,
the air vents are mostly blocked off to allow for very long footwells;
so people 6 foot+ can sit IN the car and not on top of it like some of the other kits available...

I also have a story of a guy that was having overheating problems in a Cobra,
he had the bonnet completely sealed around the opening,
Someone suggested to him to remove the rear half of this seal to fix the problem,
He thought this sounded like absolute rubbish but humored the guy and removed the bonnet seal,
Problem solved!


Peter..