612 hp source?

I read that the 599 engine is derived from Enzo and not the 575. This means that it uses the variable valve timing and different inlet geometry of the Enzo.
So no, not a simple upgrade path,
Sorry,
Ron

 

Sorry, I thought you were talking about the 599 since your title says 612 hp, now I realize you mean the 612 car!
So to answer you question, the inlet of the 575 has been modified for the SuperAmerica as follows:

"The Superamerica's engine has been boosted to deliver 540 hp at 7250 rpm (25 hp more than the 575M Maranello). This extra power was achieved by the use of new higher intake tracts, an improved flow coefficient thanks to the optimization of the fluid-dynamic characteristics of the cylinder head inlet ducts and inlet manifold. "
http://www.scoop.co.nz/stories/CU0601/S00022.htm

Doesnt tell you much, eh? By optimization they could mean good old "porting" to improve the flow or changing the geometry and layout or maybe they are inducing "swirl" . They aint telling.
Regards,
Ron

 

http://www.ferrarichat.com/forum/showthread.php?t=103721

PM stephens. This thread is just one of many about his 550, which
is probably the most modified 550 around, short of a GTC

 

From what I gather it is the manifold etc only. The head porting is hand finished already. Apparently the heads are capable of flowing 650hp stock....

 

Dear Stephen,
When you say the heads are capable of flowing 650hp does this apply generically to the 550 too? Do you know the corresponding flow number in cfm?
Regards,
Ron

 

I was referring to the 550, don't have the flowbench results at hand.