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GM Gen V Engine Info Release

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Old 10-25-2012 | 05:46 AM
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Good pics and info here too..

http://www.dragzine.com/tech-stories...-block-reveal/

So now we know that the injectors are in the valley and pump is where the distriubtor used to go, SO WHAT ARE THOSE WEIRD BUMPS FOR ON THE VALVE COVERS? WTF??

Also, whats that weird mounting flange on the drivers side down low near the front??

I like in the cylinder head pic you can see the intake port is so high and big that the rockers had to be rearranged to make room for them. Cool stuff.

And the coolant temp sensor is in the water pump, yay!! And it looks like the coolant crossover pipes are gone. Will this put it to bed for once and for all if they are needed?

Dipstick goes into the PAN not the BLOCK.

Notice that the power steering pump is NOT shown but the A/C compressor is...electric power steering coming in the C7??

Last edited by cutlass_455; 10-25-2012 at 06:06 AM.
Old 10-25-2012 | 06:07 AM
  #42  
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Originally Posted by cutlass_455
Good pics and info here too..

http://www.dragzine.com/tech-stories...-block-reveal/

So now we know that the injectors are in the valley and pump is where the distriubtor used to go, SO WHAT ARE THOSE WEIRD BUMPS FOR ON THE VALVE COVERS? WTF??

Also, whats that weird mounting flange on the drivers side down low near the front??

I like in the cylinder head pic you can see the intake port is so high and big that the rockers had to be rearranged to make room for them. Cool stuff.

And the coolant temp sensor is in the water pump, yay!! And it looks like the coolant crossover pipes are gone. Will this put it to bed for once and for all if they are needed?

Dipstick goes into the PAN not the BLOCK.

Notice that the power steering pump is NOT shown but the A/C compressor is...electric power steering coming in the C7??
A patent pending PCV system.
Old 10-25-2012 | 08:00 AM
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Originally Posted by Phoenix64
Its can only advance and retard the cam? Thats kinda lame.
Interesting that Ford and GM came to opposite conclusions.
Ford decided that direct injection wasn't worth the money on the coyote, and that VVT on each cam was more of a benefit.
GM decided direct injection was worth including, but not the ability to adjust exhaust/intake individually.
When are they just going to admit that a 3-D cam is the answer?
Probably when they become more accessible. This new engine is a big leap, one would assume introducing too many new technologies at once would be a huge risk. At any rate, I'm sure going to a DOHC setup was not worth the risk as well. If you notice, everything is similar on this engine, not exact, but similar. Going to DOHC, or a 3d cam would have ment totally different more expensive components that would have driven the cost up, and reliability down being such a new concept.

Given GM's financial delima still, baby steps is what is necessary now, and that is exactly what we see here. An already solid platform, modified to accept new concepts and technology.
Old 10-25-2012 | 08:50 AM
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Originally Posted by TransAmWS.6
Also, I hope this brings down the prices of the base LS2/LS3 C6's even more so I can get into one!
I saw a sales thread on Corvette Forum just yesterday that showed a dealership sale on 2012 base Vettes for $35K. I don't know how they can get much cheaper.
Old 10-25-2012 | 09:53 AM
  #45  
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Originally Posted by LS1LT1
Yes!
Not sure how or why that goofy *** rumor got started anyway.
I always thought the rumor came because of a displacement limit in the LeMans series..
Old 10-25-2012 | 10:35 AM
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Originally Posted by camAro242
i dont like the quote, "No more further LS engine development." i do love the lsx series a lot hope this gen will surfice better than the ls series. Another note, replacing injectors with larger ones will be a pita as they are buried
You'd have to be making some pretty wild horsepower before you need to replace the injectors. 22.0cc/sec translates to 62.8 lbs/hr. That will easily support 800 horsepower. Which is good, because I bet those DI injectors don't come cheap.
Old 10-25-2012 | 01:36 PM
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Originally Posted by Wolfsblut
I always thought the rumor came because of a displacement limit in the LeMans series..
That very likely is where/how it all started, some journalist must've posted/printed it somewhere and the general Corvette population just ran with it trying to turn it into fact or something.
I never believed it.
Simple logic and reasoning should've told everyone that they would never downsize the base engine like that, at least not this soon. Not with everyone else still upping their power numbers (420hp base V8 Mustangs and 470hp SRTs etc).
Old 10-25-2012 | 02:21 PM
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so, wholl be the first to try the LTX heads on the LSX block?
Old 10-25-2012 | 04:42 PM
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I wonder if that intake can be reworked, if needed, for L92 heads ?

Old 10-25-2012 | 04:49 PM
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Originally Posted by ez2cdave
I wonder if that intake can be reworked, if needed, for L92 heads ?

[IMG]http://speednik.com/files/2012/10/2014-6.2L-LT1-C-Intake-Assembly.jpg
no. look at the 2 intake mounting surfaces. you simply wont do it without the aid of a spacer
Old 10-25-2012 | 04:57 PM
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Originally Posted by Carter01
New LT1.... Where's the opti spark????
It's there, they just called it the all-spark this time around.
Old 10-25-2012 | 05:13 PM
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Originally Posted by cutlass_455

So now we know that the injectors are in the valley and pump is where the distriubtor used to go, SO WHAT ARE THOSE WEIRD BUMPS FOR ON THE VALVE COVERS? WTF??
PCV baffles maybe.


Originally Posted by cutlass_455
Also, whats that weird mounting flange on the drivers side down low near the front??
Could be for oil cooler or the dry sump system attach points.



Originally Posted by cutlass_455
Notice that the power steering pump is NOT shown but the A/C compressor is...electric power steering coming in the C7??
Pump is right behind the large pulley on pass. side. Above A/C compressor.

Looks like just a pump with a remote reservoir. The electric PS used in the hybrid trucks is a power hog.
Old 10-25-2012 | 06:59 PM
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Originally Posted by Bo185
PCV baffles maybe.


Could be for oil cooler or the dry sump system attach points.



<snip>
we have a winner. in the teaser picture released over the summer, you can clearly make out what appears to be a belt driven dry sump pump on the driver side:

Last edited by Wnts2Go10O; 10-25-2012 at 07:14 PM.
Old 10-25-2012 | 08:17 PM
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Originally Posted by Bo185



Pump is right behind the large pulley on pass. side. Above A/C compressor.
water pump.
Old 10-25-2012 | 09:25 PM
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Originally Posted by brewster240
water pump.
Ahhh I see it now! Thanks yep water pump.


The picture with the guy standing looks like it has different water pump on it as well as exhaust manifolds. Camaro test engine??
Old 10-25-2012 | 10:31 PM
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Originally Posted by Wnts2Go10O
no, you read an article with much conjecture that was stuff like "would make it good for boost" or " it would be appropriate to also bring back the LT4 moniker for the top of the range" and similar. or some low down gm worker saying "well, we COULD do this or that"
No, my money is on this being where he got it from...

http://www.lsxtv.com/news/video-reve...g-twin-turbos/
Old 10-26-2012 | 12:33 AM
  #57  
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Originally Posted by zacht
how is it going to be harder to crack? i thought those new gm's have direct injection...like the new cobalt ss's? i thought ive seen direct injection tuning done on cobalts...
I'm reading over on the CorvetteForum that basically the computer will have 2 encryption keys and one belongs to GM, basically making it almost impossible to tamper with the car because it will shut itself down if you try. We'll see though, the car hasn't even been released and I hope this isn't the case, but that's just what I've read on it so far.

Originally Posted by Z Fury
I saw a sales thread on Corvette Forum just yesterday that showed a dealership sale on 2012 base Vettes for $35K. I don't know how they can get much cheaper.
Yeah, you can steal them new right now, but i was actually talking about the used market, would be nice if they dropped off in price even more than they already have
Old 10-26-2012 | 02:02 AM
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Originally Posted by TransAmWS.6
I'm reading over on the CorvetteForum that basically the computer will have 2 encryption keys and one belongs to GM, basically making it almost impossible to tamper with the car because it will shut itself down if you try. We'll see though, the car hasn't even been released and I hope this isn't the case, but that's just what I've read on it so far.
hm...alright...guess aftermarket ecms and tuning software will be the ****....
Old 10-26-2012 | 07:03 AM
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Originally Posted by Wolfsblut
I always thought the rumor came because of a displacement limit in the LeMans series..
Originally Posted by LS1LT1
That very likely is where/how it all started, some journalist must've posted/printed it somewhere and the general Corvette population just ran with it trying to turn it into fact or something.
I never believed it.
Simple logic and reasoning should've told everyone that they would never downsize the base engine like that, at least not this soon. Not with everyone else still upping their power numbers (420hp base V8 Mustangs and 470hp SRTs etc).


Just to put that rumor to bed, there's no displacement limit in the ALMS, we run restrictors based on displacement and weight
Old 10-26-2012 | 09:24 AM
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Originally Posted by TransAmWS.6
I'm reading over on the CorvetteForum that basically the computer will have 2 encryption keys and one belongs to GM, basically making it almost impossible to tamper with the car because it will shut itself down if you try. We'll see though, the car hasn't even been released and I hope this isn't the case, but that's just what I've read on it so far.
It'll be interesting to see how this aspect turns out - Dodge used rolling encryption on the Gen IV Vipers and some of the latest Hemis, and it has been giving the aftermarket fits. Mopar has the key to unlock it, but won't release it at this point, making it impossible to tune these vehicles unless you rip everything out and install an aftermarket engine management system (Motec @ $10k+, etc.). Lots of Mopar guys aren't happy about it, that's for sure.

I'm wondering if this is due to warranty/safety/emissions concerns, or they're just flat out tired of people reverse engineering their hard work.


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