Go right ahead...

Michael,

It is my understanding that the cooling effect of the gas being directly injected into the combustion chamber allows for higher compression ratios and thus improved efficiency and power.

Another benefit is you can inject after the exhaust valve has closed and thus eliminate raw fuel going out the exhaust port due to valve overlap. This results in still greater fuel efficiency and of course lower emmisions.

Direct injection was successfully exploited in the LS platform from 2008-2010 by GM Racing. The ALMS & LeMans (D.I.) Corvettes won numerous races, including the 2009 24 hrs of LeMans. The technology is mature and proven to be capable in both motorsport and OEM applications. I would certainly agree, this technology is on the horizon, which is certainly not lost on a leading edge company like Ilmor. Congrats.

Some photos in ALMS trim.

Bob, are the turned aluminum parts in the intake hoses sonic restrictors? Cripes, they're small...

Yes, as Bob would tell you those were the air inlet restrictions placed on the 7.0 liter Corvette R Cars to make them more equal with the BMW's ,Ferraris, Aston Martins, etc. The same basic restrictor plate concept you see in Nascar.
If those restrictions were not placed on the Corvettes as well as some substaintial wieght adders they would have run away and hid before the other types would have finished in both of those race classes.

Very Cool pictures Bob.

I have not seen that particular DI configuration picture. Chevrolet (GM) gets some good real world application engineering from their race car efforts.

Best Regards,
Ray @ Raylar

Do we know what a ilmor 570 will cost yet?

No, but Ilmor's target price is a couple thousand less than Mercury's 525EFI, which will put it several thousand less than the new Mercury 565.

I'm not clear on the huge weight savings of this motor over a BBC. Stated weight for this new Ilmor package is 810 pounds - my fully dressed 588 ci single carb Sterlings weigh 805 pounds, complete (drop in) less headers. The CMI headers weigh 50 pounds, putting the complete power package at 855 pounds. These weights were taken using Pete's scales at Douglas Marine. Just for reference, we also weighed a Sterling 1,200 hp blower motor, complete less headers, and it weighed in right around 1,100 pounds. I think Ilmor builds a great engine package, I'm just not seeing any weight savings advantage to this new large ci small block package over a BBC cast iron block/aluminum headed setup.

I'm kind of thinking they may have been stating total weight with the Bravo(Teague) drive? My approximate calc + 585lbs engine +exhaust + bravo coupler and bellhousing + 225 lbs for bravo transom + bravo drive = approximatly 810Lbs.?

Best Regards,
Ray @ Raylar

Are you running an alu block? A complete bravo 565 setup weighs in at 1201 lbs. dry no manifolds and the drive is less than 200 lbs. The all alu Ilmor 725 weighs in at 810 lbs wet including manifolds.