Quote:
Originally Posted by MitchZ06
Turbo engines can only be a maximum of 4litres capacity, 8 cylinders maximum. Believe the road going turbo system was required to be used (no race turbo like in GT3) so many mfgers were reluctant to go down the 'homologation special' route.
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The bolded part is the most important, I think. Porsche for example would have no problems making a 4 litre, 6-cylinder turbo engine. The turbo 911s use different engines from the GT3 and don't go past 3,8 litres, too.
The 488 GTB has a 3,9 litre V8 engine, and the Ford GT has a 3,5 litre V6 engine, so they are within the rules. I really don't think more than 8 cylinders is necessary for a turbo to be competitive. BMW would have problems since the S63 in the M6 is 4,4 litre I think, but they don't seem interested anyway (more like they don't have an eligible car, actually, since their current effort is a Frankenstein with Z4 body and E92 M3 engine). McLaren could make a GTE with the 650S's current engine.