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Mercury Racing Showcasing Four-Valve Heads on LS Crate Engine at SEMA Show

Old 11-04-2014, 02:09 PM
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Default Mercury Racing Showcasing Four-Valve Heads on LS Crate Engine at SEMA Show

Intriguing development for Mercury Racing, http://speedonthewater.com/new-boat-...-sat-sema-show
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Old 11-04-2014, 02:37 PM
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Very impressed with the time and money Mercury is putting into their engines these days.
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Old 11-04-2014, 02:45 PM
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Can't wait for the NA marine version to come out- just think of what might be...

900 hp
600+ hours before a top end rebuild
552CI
900+ torque
60k

Idk just throwing some stuff out there.
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Old 11-04-2014, 02:59 PM
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I'm being told that it's based off a LS7 so 427ci
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Old 11-04-2014, 03:00 PM
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That's one way to slow an LS down, put a Ford style head on it!

Let the bashing begin......

Seriously it is cool, but why avoid the LS platform for this long then reinvent the wheel? LS engines are already far more capable than the old SBC Merc still uses. I do think up to a certain power level (albeit quite high) I do believe the LS platform is a great replacement for the heavy Big Block.

I would imagine this motor should be higher than 600 HP otherwise that is a great expense and time in design to barely eclipse stock LS engines, or "cam only" swaps.

I would like to see the in depth details of it though.
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Old 11-04-2014, 03:05 PM
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.

what is the C.I. displacement of this new crate motor?



.
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Old 11-04-2014, 04:22 PM
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Cool stuff but will be big $$$$. No away around that.
Mod it with different cams down the line ? Ah, no. Good luck.

Again, cool stuff and like seeing companies come out with different stuff.....but again, for us 99%'rs would be even cooler. LOL.
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Old 11-04-2014, 07:59 PM
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I've spent a ton of time in the past couple months trying to figure out how to make this work.... I'm a HUGE GM guy and play with LS junk every day but it's hard to look past the HP/CID of the new Coyote 5.0s. They are mean for their size. Take that math and apply it to 400+ cube builds then add more efficiency with bigger cams and we're looking at 650-700hp NA (keyword: Reliable!!) SMALL BLOCKS!!! THEN add the boost! This is good stuff here, guys!
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Old 11-04-2014, 08:23 PM
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I would think a N/A ls crate motor with good heads like this could make 600 hp, Ilmor makes 570 with pretty standard LSX heads. Add some boost and you have 750 to 900 hp and mercury has a large void in that range.
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Old 11-05-2014, 04:40 AM
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This was long overdue in my opinion. This is another move in the right direction to reduce the biggest weak link in marine performance engines. This should have happened 10 years ago. The only big problem is space that it will require, especially on the engines that will be required to have catalytic converters.
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