LS car engines do use VVT. Here's a good article on VVT.

http://www.hotrod.com/techarticles/e...g/viewall.html

From Ilmor's web site:

Introducing the Ilmor High Performance MV8 570

Ilmor developed internal components provide unsurpassed performance and reliability, including forged steel crankshaft, pistons and connecting rods
Hand-built to the same quality standards as our race engines and MV10 engines
87 octane compatible
Dual-equal hydraulic phaser that adjusts cam timing for intake and exhaust valves
Over 2" shorter and narrower than the 8.2L big block engines
570 hp @ 5900 rpm
564 ft-lbs @ 4400 rpm
10.7:1 compression ratio
High Performance Cast Iron Block; Cast Aluminum Heads
Unique Ilmor-designed custom cast aluminum upper and lower intake manifolds
Available Summer 2012

I stand corrected on the 803 pounds with drive. (Thanks, Nick.) Anyone know how much a Bravo drive/transom weighs?

Just another thought for these fine Ilmor LSX engines- that is they are 400lbs less per engine than the Merc 565 and with 454 cubes of VVT high rpms they should be about 15% or so more efficient with respect to fuel burned per hours run. Might be a nice secondary benefit, especially when gas hits $5 a gallon or more!

Best Regards,
Ray @ Raylar

Thanks guys. I've been talking w/ my buddy about gev V's and can't keep straight what has what I guess!

Hey can someone give me the short version of how variable cam timing works? Whats variable the lift? duration? both? how, some kinda funky rocker arm or lifter? what is its advantage or is the obvious manageability on the low rpm side and more everything on the top end. Just curious because i have heard it more an more lately.

They advance and retard the cam timing in relation to the crank. Advancing helps low end and retarding it helps at the other. For instance lets say the intake opens at 15 degrees before TDC at low RPM, up high they might have it opening at 8.
They have a phaser, a movable cam sprocket, that article refrenced above details it pretty good.

LSX454 http://www.gmperformanceparts.com/lsx/index.jsp

Sweet crate motor. Not that I would endorse using a GM crate motor for performance marine use.

This is far from a crate motor. ILMOR starts with a bare block and heads from GM, but that's about it. You can't buy this particular combination (or most of the parts) from GM.

...or did I miss the intention of your ?

Rotax: All Ilmor spec stuff..... Nothing crate about this big smalley!!

To you and ILMORDude, Believe I may have not made myself clear. I was not making any reference to your fine marine motor program. In fact, direct reference was made to Glasdave's mention of his liking to the LSX platform. Dave and I have talked previously about GM crate motors in marine use. In my case, using the ZZ502 as my marine motor project =