Quote:
Originally Posted by 1slow370
there's a guy in australia building a 2500hp vk56 slingshot ls's aren't some god king of the v8's, theres just a lot more of them, factory installed in sports cars, without truck manifolds and cams. the tech in an ls is 60yrs old at least ford finally went DOHC
Edit: will be buying motor in next couple weeks have money set aside so its a go. found a replacement for the intelligent key/ keyless start to rewire the door locks and add a nice alarm even remote start should i dare install one on a manual. the main boxes will be ms3, viper 5701 + custom built relay and diode board for doors and push start, racelogic traction control, standalone gauges, and painless or junkyard re-purposed fuse/relay/breaker box. I might wire 4 switches together as a simple 4-bit key combo on dash to start car too, as in flip the four switches to certain positions in order to power start button.
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Cool story and all that, but the LS7 is still king of the NA V8 motors under $40-50K in price. Mercedes has one in their AMG car that makes about 50-75hp more IIRC ...and costs about 300% more.
DOHC isn't all it's cracked up to be. The 5.0 Coyote is a great engine, but it weighs about the same as the LS7 and produces far less power, especially at lower rpms.
GM experimented with DOHC designs and stuck with cam-in-block for a reason. These reasons have been detailed again and again and again, but suffice it to say when you have a 450# motor complete from manifold to oil-pan that will make over 500 horsepower and pass emissions, you have a winner. Now consider that it will produce over 500 horses at the TIRES with exhaust and a mild cam and a tune.
Technology is great, and I am sure someday it will bring us an engine lighter than the LS-series that can produce more horsepower, but so far it has failed to do so within 2-300% of the cost of the most expensive LS-engines available.