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Originally Posted by Hammerdown
I read it as 33.3mm, but then there follows this:
For an engine having more than 8 cylinders, the restrictors’ diameter above must be increased by:
- 0.6 mm for 1 restrictor,
- 0.4 mm for 2 restrictors;
For closed cars equipped with an air conditioning system, the restrictors diameter above must be increased by :
- 0.5 mm for 1 restrictor,
- 0.3 mm for 2 restrictors;
which would mean the Aston can use 34mm holes, a 9.4% increase in area over the GT1 engine, giving maybe 655hp. Nice, but still no Diesel!
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The Peugeot 908 does not use AC, so presumably customer cars (e.g., Lola) won't need it either.
So the Aston Martin V12 would need 2 x 33.7 mm restrictors.