Mercury Marine at SEMA w DOHC LS motors

Xfirez51

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Here's a link that gives you a glimpse of the heads on an LS block. MMR has been using GM motors for quite a long time. High horsepower is what they do.
Durability is even more critical if you are 50miles out to sea.
Check out the vid also, the 1650 on the side of the prototype is for HP.

Runway 9-27 : The Road to SEMA | Mercury Racing

YouTube of road going QC4V

http://youtu.be/DEhbdaMcy0I
 

Turbocharged400sbc

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HAHAHAHAHA
the heads/cam carriers are extremely similar to the 3.4L TDC (5 cam) GM v6 lol

the early ones look to be chain driven but the other pics show a belt drive off the 5th cam....
 

1quick

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who said this was a ls based motor? as far as i know its a big block ive been a fan of the QC4v since back before the first 1100 ever came out, they do have a performance ls based motor but it has standard style ls heads on it
 

1quick

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the intake design and cathedral type ports are very similar, and not hampered by the inline arrangement of the lsx
very similar I get but your not taking 496 heads and bolting them on a 6.0, that was my point, these are not bolt on's for a small block lsx motor because the merc QC4v is a big block same style as the 496 but with a bunch of awesome added
 

1quick

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never mind i see that they started to adapt the 4v design to the small block, I thought they were trying to say the 1100, 1350, and 1650 were small blocks there not they are big ass mother fuckers
 

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