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Originally Posted by knighty
Yup, just worked it out along the same lines too, the data I have below is from race engine magazine when they interviewed Jason Hill about the Prodrive GT1 aston engine project.
2005 AM V12 with 2 x 31.2mm restrictors = 1530mm area = 585bhp
2006 AM V12 with 2 x 30.8mm restrictors = 1490mm area = 570bhp
2007 AM V12 with 2 x 30.7mm restrictors = 1480mm area = 570bhp
Divide the power by the restrictor area and I get an average ratio of 0.383……therefore for 2008 P1 engine using a homologated GT1 base motor…...
2 x 33.7 P1 homologated GT1 restrictors = 1784mm = 683bhp
2 x 34mm P1 homologated GT1 restrictors (Aircon) = 1816mm = 695bhp
So yes, I now agree!......as the P1 engine will be spinning faster that in its GT1 guise I'd also say it was good for just under 700bhp
If I was Mr Judd I'd be pretty peeved looking at those numbers :-(
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These numbers make very interesting reading; however, where would the Aston engine be revving to get this power (as the displacement will not change) and what will its fuel consumption look like. Although the diesels have overcome this to a degree, how much heavier would the Aston motor be over, say, a Judd.