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GM Gen 5 Small Block - Live Blog

GM Gen 5 Small Block
Posted October 24 2012 05:09 AM by Justin_at_GMHTP 
Filed under: Gm High Tech Performance Magazine

GM Gen 5 Small Block launch

We're live at the GM Gen 5 Small Block launch here at the GM Powertrain Center in Detroit and we're going to be bringing you live updates here, on twitter, and on our Facebook page. Of course, we will also have a complete write up in the magazine, but if you want details as they are released, this is the place to be. Join us below, and in the comments, to read more.


8:07 - GM has good coffee... The Gen5 is under a blanket right in front of us.



32 comments
Justin_at_GMHTP
Justin_at_GMHTP

Buried the pump and injectors in the valley to reduce 'click' from the DI system at idle.

Justin_at_GMHTP
Justin_at_GMHTP

"There will still be LS crate and service engines being built. No more further LS engine development."Deck height is the same, rod length, stroke and bore are the same. Crank to cam centerline are the same."

Justin_at_GMHTP
Justin_at_GMHTP

"There will still be LS crate and service engines being built. No more further LS engine development."

Justin_at_GMHTP
Justin_at_GMHTP

"I'll put this combustion system up against anybody in the world."

Justin_at_GMHTP
Justin_at_GMHTP

"One VERY big intake and one modestly sized exhaust valve"

Justin_at_GMHTP
Justin_at_GMHTP

Why the LT1 name?"We do like to maintain and protect our RPOs for the small block and we reuse them."

Justin_at_GMHTP
Justin_at_GMHTP

"There will always be flexibility" regarding aftermarket add-ons.

Justin_at_GMHTP
Justin_at_GMHTP

"We hope it is very difficult to crack the computer code." Do not like...

Justin_at_GMHTP
Justin_at_GMHTP

"We hope it is very difficult to crack the computer code." Do not like...

Justin_at_GMHTP
Justin_at_GMHTP

"Pleasantly surprised by the acoustical properties."

Justin_at_GMHTP
Justin_at_GMHTP

Don't forget, we've got photos up on our Facebook page! www.facebook.com/gmhightech

Justin_at_GMHTP
Justin_at_GMHTP

Variable oil pump for precise oil pressure control. 50-75kpa lower pressure than the Gen4 LS.

Justin_at_GMHTP
Justin_at_GMHTP

Variable-displacement oil pump will adjust oil flow to maintain proper oil pressure at the bearings. 50-75kpa lower oil pressure than the Gen4 LS engine.

Justin_at_GMHTP
Justin_at_GMHTP

Four-into-one cast short-tuber header, that is nearly equal length.

Justin_at_GMHTP
Justin_at_GMHTP

"Swapped intake and exhaust""Twisted shaped high-flowing intake and exhaust ports""Centralized spark plug"

Justin_at_GMHTP
Justin_at_GMHTP

62 crank degrees of cam phasing authority on the CVVT camshaft.

Justin_at_GMHTP
Justin_at_GMHTP

62 crank degrees of cam phasing authority on the CVVT camshaft.

Justin_at_GMHTP
Justin_at_GMHTP

Direct injection system hidden under the intake manifold. Injector flow rate is 22.0cc/s@10MPa, up to 2,175psi (15MPa). 65-volt fuel injector controller. Highest flowing pump on the market and it is driven off of the camshaft with a unique lifter system.

Justin_at_GMHTP
Justin_at_GMHTP

Engine will be built in the Tonawanda Engine Plant, which is where the original 1955 small block was built.

Justin_at_GMHTP
Justin_at_GMHTP

"LT1 Advanced Combustion System""Assures every drop of fuel is converted to energy to maximize fuel efficiency, reduce emissions, and reduce knock sensitivity."

Justin_at_GMHTP
Justin_at_GMHTP

Jordan Lee - Chief Engineer is up now. Here comes the good stuff!

Justin_at_GMHTP
Justin_at_GMHTP

Increased based displacement allows the engine to stay in 4-cylinder mode more often, resulting in more power and torque with increased fuel consumption. Engine is 99.9-percent new.

Justin_at_GMHTP
Justin_at_GMHTP

8:10 - We're going to be dropping news in the comments, so keep refreshing for more info as it happens.

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GM High-Tech Performance
GM High-Tech Performance