Jgtc engine

[alex h]

It's not actually a 3S though...it's VERY similar looking but they did something trick with the cooling systems and had independant cooling for the head and block. I can't remember what it is but CW knows, and has posted the answer.

However, last year they used a 3UZ-FE V8 stroked to 5.2L but with small restrictors, this year they are down to 4.5 or so to take advantage of bigger restrictors. To get the championship back off of Nissan.

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Found this from CW.

The jap GT championship regs are extremely complex, but basically the car is more competitive with the lighter engine and reduced fuel consumption. They use the 503E engine, it LOOKS like a 3SGTE, but is in fact radically different and shares very very few parts. For example the engine runs 2 water cooling systems, the head and block being divorced, coolant wise, this is to help avoild hot spots in the ports and combustion chambers. it runs lots of external coolant pipes to do this and is nicknamed Medusa.

It's a bit long in the tooth now, but still a good engine when run on modern management. In GTP racing Toyota were seeing 1000 BHP in qualifying trim, 800 in race spec. The engine in the pics posted isn't a 503E though.

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