The issue at high speed is not really engine temps but inlet temps.
As Steve says the scoop (especially the bugeye) is ineffective over about 100mph ad the air flow is lifted above it by the front of the car and as a result the TMIC loses efficiency. As the inlet temps increase this leads to a higher chance of detonation which if severe can quickly destroy valves, pistons, rods and bearings!
I'd look at possibly adding an STI scoop as a minimum and ideally an STI intercooler & undertray.
Oil temps need monitoring as well - Millers quote the CFS Nano as suitable for operating up to 125 centigrade with a peak of 150 centigrade. Running too hot too long will cause the oil to start to break down and you could risk bearing failure or worse. - consider an temp gauge and possibly even an oil cooler.
__________________
2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter
|