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Old 04-22-2012, 11:06 AM   #1
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Default 2010 - 2011 Corvette Racing LS7-based engine

I have a friend who was fortunate enough to participate in some of the engineering of this engine. I don't THINK this is a repost but let me know if it is and I will just delete it. It has a lot of cool ideas in it. I love the engineering that goes into stuff like this to deal with restrictions placed by sanctioning bodies. Most of this is cut and paste out of the email he sent it to me in.

Click the image to open in full size.

-Dry sump
-Direct injection
-E85
-550 hp through two 34mm (last I knew...) restrictors
-180 degree firing duration, two cylinders fire at a time instead of 1 every 90 degrees like we are used to. The crank looks like a four cylinder crank. That's what give those engines the super deep and thunderous exhaust note
-1 7/8" primaries and a tri-Y long tube header, this along with the firing order make for awesome scavenging.
-It has a 4.1xx bore and a 3.1-3.3" stroke crank which make it super efficient and fast rev'ing.
-5.5L displacement.
-Each runner has its own throttle blade, the entire air induction system is carbon fiber.
-The plenums are above the heads and you can only see about 1/4 of them on the engine, they are massive!
-The engine sits 2-3" lower in the chassis and the top clearance is for the huge intake sys.
-Highly modified cylinder heads, you can see the plugs for the water jacket, they are used to seal off the provisions for the water jacket core printing which allows for a super precise casting.
-All structural castings are low pressure cast and cost 3-4 times more than a typical casting.
-belt driven cam drive


When I first saw the pic I immediately noticed how different the block looked but couldn't place exactly why. He explained to me that "the skirt that hangs below the crank CL has been machined off and a cast girdle that doubles as the dry sump pan has been fitted to cap the bottom of the engine. Add 1" to the skirt on an oem block and that'll give you an idea of how compact that engine is."

Very cool stuff, IMHO.

J. J.
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Old 04-23-2012, 07:58 AM   #2
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Did you find out how much one would cost???

Be nice to see a ccouple of turbos strapped to one of these engiens.

Chris.
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Old 04-23-2012, 10:15 AM   #3
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He gave me a rough idea but specifically asked me not to post it. Sorry.

J. J.
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Old 04-25-2012, 07:56 AM   #4
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Can you outright purchase the engines or do you have to lease them?.....
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Old 04-25-2012, 10:05 AM   #5
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They are not for sale or purchase. Its a one-off.
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Old 04-30-2012, 04:31 PM   #6
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This from the corvette team who switched down to GT2 where they could compete against a more difficult field like porsche and ferrari because GT1 was too easy for them...
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Old 05-02-2012, 08:26 AM   #7
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5.5L...direct injection...I think this is the first look at the new GEN V LS engine....
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Old 05-04-2012, 09:35 AM   #8
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They need to have a second one built just to put in a museum....this thing IS a work of art
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Old 05-06-2012, 02:50 PM   #9
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Quote:
Originally Posted by mark21742 View Post
They need to have a second one built just to put in a museum....this thing IS a work of art
That's the joy of working for race teams. You can build whatever is needed! Have you seen some of the motoGP bike stuff? It's a work of art! And f1 or GT racing is the same. The level of craftsmanship is second to none.

Even things like turbos becomes worms of art. The t30r (i think) from garrett is over $10,000 and it's only a 500bhp turbo. But the efficiency and fine terence of the blade to housing clearances are what cost the money. As has been said there is probably no amount of money that could get someone one of these engines. That's simply because of the countless hours of r&d that's gone into it. Plus these engines are constant work in progress. In 6 months there will be several new components on the engine to make it run better.
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Old 05-08-2012, 09:09 AM   #10
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I envy the guts that work on, build and race things like this.....but in a good way lol
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Old 05-11-2012, 01:14 AM   #11
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where do the injectors go into the head?
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Old 05-11-2012, 01:05 PM   #12
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That thing is a work of art. Beautiful.
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Old 05-26-2012, 10:57 AM   #13
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Quote:
Originally Posted by bww3588 View Post
5.5L...direct injection...I think this is the first look at the new GEN V LS engine....
Yep, or at least the concept.

Do the math for displacement on an engine with the 6.2L bore and the 4.8L crank.

Hmmm.
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Old 06-17-2012, 06:40 PM   #14
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http://www.corvetteracing.com/2012-specifications.shtml
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Old 07-01-2012, 06:21 PM   #15
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Quote:
Originally Posted by bww3588 View Post
5.5L...direct injection...I think this is the first look at the new GEN V LS engine....
+1

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Old 07-03-2012, 07:27 AM   #16
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I want to hear that flat plane crank in an LSX.

Dear god, If this is a prototype, I hope that crank carries into the production C7.
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Old 07-03-2012, 09:52 AM   #17
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Quote:
Originally Posted by 409CISecondGen View Post
I want to hear that flat plane crank in an LSX.

Dear god, If this is a prototype, I hope that crank carries into the production C7.
Think exotic Italian on steroids
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Old 07-05-2012, 02:15 PM   #18
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Am I the only one who noticed the oil pump in this engine?
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Old 07-08-2012, 10:45 AM   #19
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Wonder why they used AN fittings rather than Wiggins clamps....
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Old 07-08-2012, 11:58 AM   #20
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Quote:
Originally Posted by germeezy1 View Post
Am I the only one who noticed the oil pump in this engine?
Belt driven?

Quote:
Originally Posted by CTSmechanic View Post
Wonder why they used AN fittings rather than Wiggins clamps....
No clue. Do they normally use Wiggins or something? Is there something wrong with AN? My rig is covered in AN fittings. I probably have $3000 worth of just AN fittings in my rig and I keep another $1000 worth in my toolbox just for trail repairs.
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Old 07-08-2012, 11:58 AM
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