Gen V Small Block: GM Promises Leaner and Meaner V8′s...Hello LS or goodbye?

[05ChevySilveradoSS]

WIXOM, Mich. – A new direct-injection fuel system will help GM’s Gen-V small-block engine deliver greater fuel efficiency compared with the current generation. The fifth-generation small block is an all-new engine family that builds on the architectural and technology legacy of previous generations with greater efficiency, performance and refinement.

General Motors is investing more than $1 billion in manufacturing facilities associated with producing Gen-V small-block engines, resulting in the creation or retention of 1,711 jobs.

GM announced the new direct-injection fuel system for the small block at the Performance Build Center, in Wixom, Mich., as the final fasteners on the 100-millionth production small-block engine – a 638-hp supercharged LS9 engine for the Corvette ZR1 – were tightened. The small block was introduced in 1955.

“Direct injection is a vital progression from conventional port fuel injection that enables an advanced, new level of engine management. The precise control of combustion afforded from direct injection makes it almost entirely an engineering ‘win-win’ – you get enhanced power and torque in addition to better fuel efficiency,” said Bill Visnic, analyst and senior editor at Edmunds.com.

Read more....http://media.gm.com/content/media/us...1129_100M_GenV


What you guys think? Will it be Hello to the new LS engines or will it be goodbye? Idk but its kindve bittersweet if you ask me, bc i love me some LS motor :/

[Lloyd-TX]

I dunno - "LVx" engine family? "LTx" brings up BAD memories, and "LUx" sounds kinda strange.

Camshaft is moving up for shorter pushrods. Supposed to have cam-in-a-cam dual camshaft phasing. SIDI of course. Higher compression. REALLY glad they're staying with the 4.4" bore centers, though a move to 4.5" or even 4.6" bore centers would be awesome. Not gonna happen, though.

Can't wait. Hoping I can afford a 2014 Sierra Denali when they go into production.

[free_energy0]

Is a concentric cam confirmed for the LT1?

[AveoUser]

They should bring all of these technologies to the 4.3 V6, make it all aluminum and supercharge it, and then mate it to a 6 speed auto or stick shift. It could definitely go against Ford's Ecoboost trucks. The engine would be more compact and weight less than their Ecoboost and have similar economy and performance numbers.

[NHRATA01]

They should bring all of these technologies to the 4.3 V6, make it all aluminum and supercharge it, and then mate it to a 6 speed auto or stick shift. It could definitely go against Ford's Ecoboost trucks. The engine would be more compact and weight less than their Ecoboost and have similar economy and performance numbers.

The 4.3 is based off of ancient SBC architecture though and has numerous compromises that make it obsolete in comparison these days. They should scrap it all together and make a base V6 off the LSx motors if that's the plan. Though I'm sure it would be more cost effective to build a truck motor off the 3.6 DI block.

[NHRATA01]

I dunno - "LVx" engine family? "LTx" brings up BAD memories, and "LUx" sounds kinda strange.

Camshaft is moving up for shorter pushrods. Supposed to have cam-in-a-cam dual camshaft phasing. SIDI of course. Higher compression. REALLY glad they're staying with the 4.4" bore centers, though a move to 4.5" or even 4.6" bore centers would be awesome. Not gonna happen, though.

Can't wait. Hoping I can afford a 2014 Sierra Denali when they go into production.

I'm sure they have to stay with the same bore centers because realistically it's still using an LSx style block that has been in production since '97. All of GM's Gen III/IV's have been utilizing the same basic block design. What will change no doubt will be the top end, not the shortblock.

[Michael_S]

Supposed to have cam-in-a-cam dual camshaft phasing.

Is that confirmed anywhere? A lot of websites have had posts asking for it, and I know I made a few posts here at GMI linking to the website for the cam-in-a-cam dual camshaft phasing used in the 2008 Viper. ( http://www.mechadyne-int.com/vva-pro...tric-camshafts )

But I have not seen any rumors from reliable sources, let alone official confirmation, that this technology will reach the Gen V small block.

[Lloyd-TX]

Is that confirmed anywhere? A lot of websites have had posts asking for it, and I know I made a few posts here at GMI linking to the website for the cam-in-a-cam dual camshaft phasing used in the 2008 Viper. ( http://www.mechadyne-int.com/vva-pro...tric-camshafts )

But I have not seen any rumors from reliable sources, let alone official confirmation, that this technology will reach the Gen V small block.

I'm pretty much betting on it Michael.

The dual independent, OHV VVT technology has already been developed, and proven in the Viper V10. Both GM and Fiat/Chrysler would be FOOLS to not implement this technology in their respective OHV engines. Especially GM, since they're engineering an entirely new Gen V small block.

JMHO . . .

[Break80]

currently have a 6.6 duramax..wondering if the new gen V would be able to tow a 30' travel trailer , let's say up to 8,500-9,500 lbs..also may have an atv in the bed for max payload..I would love a gas engine option that would still give me more power than I need, but still offer really good mileage ( and not to mention probably save me $8-$9k over the diesel premium pricing..

[mattp232]

They should bring all of these technologies to the 4.3 V6, make it all aluminum and supercharge it, and then mate it to a 6 speed auto or stick shift. It could definitely go against Ford's Ecoboost trucks. The engine would be more compact and weight less than their Ecoboost and have similar economy and performance numbers.

that would be awesome!!. as long as they keep it with 1 cam not that ohv BS and rear drive based. dont turn the engine sideways thats for honda ridgeline owners. truck of the year my ass

[Dr. Show-Me]

Quality, capability, longevity all trump concerns of ohv or ohc configurations to me. If the GenV is a further refinement of the genIV with superior fuel economy to it but the same reliability, it will be a winner.
Does anyone have any real new information on this engine?

[germeezy1]

Quality, capability, longevity all trump concerns of ohv or ohc configurations to me. If the GenV is a further refinement of the genIV with superior fuel economy to it but the same reliability, it will be a winner.
Does anyone have any real new information on this engine?

I agree, and knowing how fond I am of my L92 I will like it even more with more power and better fuel economy.

[Michael_S]

I'm pretty much betting on it Michael.

The dual independent, OHV VVT technology has already been developed, and proven in the Viper V10. Both GM and Fiat/Chrysler would be FOOLS to not implement this technology in their respective OHV engines. Especially GM, since they're engineering an entirely new Gen V small block.

JMHO . . .

The pushrod VVT technology employed by Chrysler is already pretty impressive, they get 470 horsepower naturally aspirated from 6.4 liters without direct injection. The LS7 in the Corvette Z06 isn't quite as efficient, and it's a pretty expensive engine but lacks any VVT technology. If GM gets something on par with the Chrysler pushrod VVT technology plus direct injection, the successor to the 6.2 liter LS3 could be hovering right around 500 horsepower even without the cam-in-cam technology.

Don't get me wrong, I still hope to see cam-in-cam. I'm just not betting on it until we get more official confirmation.

[Lloyd-TX]

The pushrod VVT technology employed by Chrysler is already pretty impressive, they get 470 horsepower naturally aspirated from 6.4 liters without direct injection. The LS7 in the Corvette Z06 isn't quite as efficient, and it's a pretty expensive engine but lacks any VVT technology. If GM gets something on par with the Chrysler pushrod VVT technology plus direct injection, the successor to the 6.2 liter LS3 could be hovering right around 500 horsepower even without the cam-in-cam technology.

Don't get me wrong, I still hope to see cam-in-cam. I'm just not betting on it until we get more official confirmation.

OK Michael, we'll have to wait and see.

It does makes one wonder though - just what the heck GM is talking about when they mention the Gen V V8 "advanced combustion design" . . . ???

[free_energy0]

I'm betting it will get a cam phaser and not a concentric cam, for two reason; one is that I bet GM would have to pay a big fat licensing fee to Mechadyne; and two, it's not like GM to try a widgit that hasn't seen mass market primetime. Could be a hell of a recall.