Martins is three x EECIV intercoolers (similar to 4x4s), and actually requires bumper and cross-member cutting . He kindly lent it to me for width and inlet / outlet dimensions, so that (Pro-alloy) Carl could fabricate it without needing my car there .

Wayne,
I would agree that your double RS500 one would be ideal, but you don't do this in Escort width yet ..... 30°C ambients yesterday saw a max of 50°C @ 7000rpm @ 1.9 bar held (and all with a single 0.6mm WI jet - a second one is required though to keep the EGTs down) . There is no way your standard RS500 intercooler could compete with that .

Ryan,
I would recommend the Pro-alloy double thickness RS500 style - it will be awesome in a Sierra (shame it doesn't fit Escorts ).

Vic,
In 30°C ambients, the static and slow speed water temps are mint, it's just on full bore runs that the temps gradually climb to 100°C. I can keep this down by running internal heating on full, but in 30°C temps already, it's not very confortable . I have yet to try ducting all the available air through the radiator, as a fair amount of the bottom part is in direct flow.

Lee,
I already have a Radtec alluminium radiator on. I'm going to try a few things and if they don't work, it will be a Pro-alloy 50mm one .