Poodles;1163926 said:
Stock cooling system was designed for an N/A car, it's already marginal IMHO and an overheat will pop a headgasket in short order.
While I agree with the rest of your post, I'd beg to differ on the statement quoted above. I'd even go so far as to say it's patently untrue.
The stock NA system was designed for an NA car. The stock turbo system was designed for a turbo car.
The factory 7M's cooling system is far more than just adequate. I've run substantial horsepower on the stock cooling system provided:
- The system is well maintained.
- The fan shroud is intact.
- The proper coolant/water mix is maintained.
- The engine undercover is in place.
- The fan clutch isn't worn out.
I've owned about 15 Supras since 1990, I've
NEVER had a problem with the stock cooling system up to twice the original factory horsepower. I've never seen the temp gauge move at all, even under the hottest driving conditions, provided those things above are true.
These days most of these cars have been fucked with or poorly maintained, and you'll see problems, but it's not the design of the system. I still stand by my statement that 99.999 times out of a hundred, the weak link in the MKIII is the current (or past) owner.