The NEW LT1

[79LT1Monte]

Just saw this on Twitter . http://fb.me/1blrl2fld (http://t.co/kw2j212k)

I hate when they bring back old names for new engines or cars.

[zooguy]

no OPTI :cry:

[zooguy]

an then i found this ....

http://www.youtube.com/watch?v=z6kslKcRCbA&feature=g-u-u

[BLK95-Z]

Generation 5. 6.2L..... Direct injection. Suppose to put down 450 to the wheels in the new Vette...LT1 ftw!

[popo8]

Lol... Just a few weeks ago...this topic got a bit heated on here... And by heated i mean...it was a great debate...


Ill find the link and attach it when at a computer..... but u know...the engine name that brings us together here is also a re use of a name.......



Saw this on fb:

http://img.tapatalk.com/d/12/10/24/5aqy7ura.jpg


Larry (Popo8) Co-owner
LTXtech.com

[zooguy]

http://www.facebook.com/photo.php?fbid=10151190714043930&set=a.197325103929.129925.116021808929&type=1&theater

[meissen]

I can't wait to get a new Camaro with the LT1 in it (be it late 5th gen or early 6th gen) and then be able to say both my 1994 Camaro and my 201x Camaro have an LT1 in it. :laugh:

[popo8]

If ur on fb... Gmhtp is live posting from the "press conf" introducing the new ltX


Larry (Popo8) Co-owner
LTXtech.com

[79LT1Monte]

I guess I missed the first discussing. I know this has nothing to do with the LT1 as we know it, I just can't stand the lack of creativity. Of all the letters in the alphabet why do you have to reuse the same combinations. At least they aren't calling Coyotes or anything gay :laugh:

[zooguy]

http://sphotos-a.xx.fbcdn.net/hphotos-prn1/155368_10151190759613930_1390886066_n.jpg

[zooguy]

http://sphotos-a.xx.fbcdn.net/hphotos-prn1/155368_10151190759613930_1390886066_n.jpg

LT1

[popo8]

LT1

Fukr... I was just about to post that up.... lol

[The SRZ]

They can keep the car, I'll take the engine instead and just put it in the 4th gen. :D

[popo8]

Here is the other thread where we were debating.....

http://ltxtech.com/forums/showthread.php?19987-New-C7s

and they just posted this video, which seems to play sometimes and not others.. that shows the new motor on a rotating engine stand, to show off the oil pickup system and how it doesnt mis a beat on an angle for a long time...


http://www.facebook.com/photo.php?v=486369201393845

[popo8]

http://www.facebook.com/gmhightech

[zooguy]

you beat me to it larry lol

[BLK95-Z]

Did anyone see the intake ports on the heads? Woah...

[Gumby]

http://www.detroitnews.com/article/2...rolet-Corvette (http://www.detroitnews.com/article/20121024/AUTO0103/210240387/1361/GM-unveils-small-block--LT1-6.2-liter-V-8-engine-for-%E2%80%9914-Chevrolet-Corvette)


Pontiac — General Motors Co. Wednesday debuted its all-new small-block, LT1 6.2-liter V-8 engine, which will power the all-new 2014 Chevrolet Corvette.

In what GM is calling the most significant redesign in its history, the fifth-generation small block will include a direct injection fuel system and active fuel management, or cylinder deactivation, which helps it achieve greater fuel efficiency and will give owners more miles out of a gallon of gas.

GM said it will build the new engine at its Tonawanda Engine Plant in Buffalo, N.Y.

"The engine, if you talk to our customers, that's the heart of the beast," said Tadge Juechter, executive chief engineer of the Corvette, during a media unveiling at GM's Powertrain Engineering Center in Pontiac.

The new small-block will be under the hood of the redesigned Corvette, which the automaker will reveal Jan. 13 at a Detroit area event. It will be just a day ahead of the start of press days for the North American International Auto Show.

GM's engineers started over redesigning the engine using just a handful of existing parts. They worked to make it as compact and lightweight as possible but while ensuring high performance.

Juechter said the base 2014 Corvette will generate at least 450 horsepower or greater. The all-new Corvette also is expected to generate 450 foot-pounds of torque and achieve more than 26 miles per gallon fuel economy.

"We are confident today we'll be zero to 60 seconds in less than 4 seconds and that is on the entry-level vehicle," Juechter said.

The Corvette small block engine for the first time includes direct injection and active fuel management, which saves fuel by deactivating four of the eight cylinders in light load situations such as coasting on an exit ramp or cruising speed on the highway. The engine also uses continuously variable valve timing to aid in fuel economy.

"Our objective for the development of the all-new LT1 was to raise the bar for performance car engines," Mary Barra, senior vice president of global product development, said in a statement. "We feel that we have achieved that by delivering a true technological masterpiece that seamlessly integrates a suite of advanced technologies that can only be found on a handful of engines in the world.

The all-new Corvette will arrive on dealer lots late next year.

The LT1 is the first engine GM is revealing in its fifth-generation of small block engines. The small blocks likely also will power GM's all-new 2014 full-size pickups and SUVs.



From The Detroit News: http://www.detroitnews.com/article/2...#ixzz2AEPqWmzT (http://www.detroitnews.com/article/20121024/AUTO0103/210240387#ixzz2AEPqWmzT)

[CamaroZGuy]

saw the info on FB this morning and been giving a few people at work shit about it since they talk shit about the LT1....LOL

but i still have mixed feeling about the name and if this site takes on a Gen 5 section. i dont want it to become the "other" site...

[CamaroZGuy]

They can keep the car, I'll take the engine instead and just put it in the 4th gen. :D

techincaly it would still be an LT1....LOL

[CamaroZGuy]

At least they aren't calling Coyotes or anything gay http://ltxtech.com/forums/images/smilies/laugh.gif

them Coyote engines are actually bad ass.....

[Gumby]

12236

[MeanTA]

Break down of the new LT5:

http://www.youtube.com/watch?v=9E-DQ1qQyJk&feature=youtu.be

And the coyote engines and ford in general suck:)

[popo8]

Lol...

Third thread about the new LT1.....

1st thread:

http://ltxtech.com/forums/showthread.php?19987-New-C7s


2nd thread:
http://ltxtech.com/forums/showthread.php?20287-GM-Reusing-the-LT1-name

[Gumby]

Well heres some more lol


http://www.dragzine.com/tech-stories/engine/breaking-news-chevy-gen-v-small-block-reveal/

[popo8]

Well heres some more lol


http://www.dragzine.com/tech-stories/engine/breaking-news-chevy-gen-v-small-block-reveal/

hahahahah.... bringin them all together.. might as well call this THE NEW LT1 CONSOLIDATION THREAD.

[zooguy]

direct port injection :drool:

[popo8]

direct port injection :drool:

"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."

12237

[thunderkyss]

12238

Still looks like an LS Motor to me (http://wot.motortrend.com/next-gen-lt1-62-liter-v8-for-2014-corvette-revealed-with-450-hp-new-tech-280365.html)

[popo8]

12238

Still looks like an LS Motor to me (http://wot.motortrend.com/next-gen-lt1-62-liter-v8-for-2014-corvette-revealed-with-450-hp-new-tech-280365.html)

According to GMHTP, "it is 99.9% new design... "

[KissMyWhtSS]

Anyone following the Gen V Small Block launch? GMHighTech is there and have been posting media and information on their social media pages:

facebook (https://www.facebook.com/gmhightech)
twitter (http://twitter.com/gmhtp)

Feel free to repost the information and discuss.


For Immediate Release: Wednesday, Oct. 24, 2012

All-New 2014 Corvette LT1 V-8 a Technological Powerhouse

• Advanced technologies including direct injection, active fuel management, continuously variable valve timing support advanced combustion system
• Preliminary output of 450 horsepower (335 kW) and 450 lb.-ft. of torque (610 Nm)
• Helps deliver estimated 0-60 performance in less than four seconds and best-ever fuel economy in the Corvette

DETROIT – When the all-new 2014 Chevrolet Corvette arrives late next year, it will be powered by a technologically advanced, racing-proven 6.2L V-8 delivering an estimated 450 horsepower and helping produce 0-60 times in less than four seconds.

The new Corvette LT1 engine, the first of the Gen 5 family of Small Block engines, combines several advanced technologies, including direct injection, Active Fuel Management and continuously variable valve timing to support an advanced combustion system.

"Our objective for the development of the all-new LT1 was to raise the bar for performance car engines," said Mary Barra, senior vice president, global product development. "We feel that we have achieved that by delivering a true technological masterpiece that seamlessly integrates a suite of advanced technologies that can only be found on a handful of engines in the world.

"What makes this engine truly special is the advanced combustion system that extracts the full potential of these technologies. The art and science behind that combustion system make the Corvette LT1 one of the most advanced V-8 engines in the world," said Barra.

Output, performance, and fuel economy numbers will not be finalized until early next year, but the new LT1 engine is expected to deliver:
• The most powerful standard Corvette ever, with preliminary output of 450 horsepower (335 kW) and 450 lb.-ft. of torque (610 Nm)
• The quickest standard Corvette ever, with estimated 0-60 performance of less than four seconds
• The most fuel-efficient Corvette ever, exceeding the 2013 EPA-estimated 26 miles per gallon on the highway.

"The Holy Grail for developing a performance car is delivering greater performance and more power with greater fuel economy and that's what we've achieved," said Tadge Juechter, Corvette chief engineer. "By leveraging technology, we are able to get more out of every drop of gasoline and because of that we expect the new Corvette will be the most fuel-efficient 450 horsepower car on the market."

Advanced combustion system optimized with 6 million hours of analysis
"The Corvette LT1 represents the most significant redesign in the Small Block's nearly 60-year history – building on its legacy to make one of the world's best engines even better," said Sam Winegarden, vice president, Global Powertrain Engineering. "More than just great horsepower, the LT1 has been optimized to produce a broader power band. Below 4,000 rpm, the torque of the Corvette LT1 is comparable to that of the legendary, 7.0L LS7 out of the current Corvette Z06. The LT1 is a sweetheart of a power plant and drivers will feel its tremendous torque and power at every notch on the tachometer."

Increased power and efficiency were made possible by an unprecedented level of analysis, including computational fluid dynamics, to optimize the combustion system, the direct injection fuel system, active fuel management and variable valve timing systems that support it. More than 10 million hours of computational analysis were conducted on the engine program, including 6 million hours (CPU time) dedicated to the advanced combustion system.

Direct injection is all-new to the engine architecture and is a primary contributor to its greater combustion efficiency by ensuring a more complete burn of the fuel in the air-fuel mixture. This is achieved by precisely controlling the mixture motion and fuel injection spray pattern. Direct injection also keeps the combustion chamber cooler, which allows for a higher compression ratio. Emissions are also reduced, particularly cold-start hydrocarbon emissions, which are cut by about 25 percent.

Active Fuel Management (AFM) – a first-ever application on Corvette – helps save fuel by imperceptibly shutting down half of the engine's cylinders in light-load driving.

Continuously variable valve timing, which GM pioneered for overhead-valve engines, is refined to support the LT1 AFM and direct injection systems to further optimize performance, efficiency and emissions.

These technologies support the all-new, advanced combustion system, which incorporates a new cylinder-head design and a new, sculpted piston design that is an integral contributor to the high-compression, mixture motion parameters enabled by direct injection.

The LT1 head features smaller combustion chambers designed to complement the volume of the unique topography of the pistons' heads. The smaller chamber size and sculpted pistons produce an 11.5:1 compression ratio, while the head features large, straight and rectangular intake ports with a slight twist to enhance mixture motion. This is complemented by a reversal of the intake and exhaust valve positions, as compared to the previous engine design. Also, the spark plug angle and depth have been revised to protrude farther into the chamber, placing the electrode closer to the center of the combustion to support optimal combustion.

The pistons feature unique sculpted topography that was optimized via extensive analysis to precisely direct the fuel spray for a more complete combustion. The contours of the piston heads are machined to ensure dimensional accuracy – essential for precise control of mixture motion and the compression ratio.

Race-proven legacy, state-of-the-art performance
The first Small Block V-8 debuted in the Corvette in 1955. It displaced 4.3L (265 cubic inches) and was rated at 195 horsepower, drawing air and fuel through a four-barrel carburetor. Five years later, V-8 power helped Corvette secure its first victory at the 24 Hours of Le Mans.

In 2012, the Small Block-powered Corvette Racing C6.R beat Ferrari, BMW and Porsche to sweep the drivers', team, and manufacturer championships in production-based American Le Mans Series GT class. These championships make Corvette Racing the most successful team in ALMS history, with a total of 77 class wins, eight drivers' championships, and nine manufacturer and team championships since 2001.

"The engine requirements for a production car and a race car are remarkably similar," said Jordan Lee, Small Block chief engineer and program manager. "In both cases, you want an engine that is powerful and efficient, compact and lightweight, and durable. That combination is what made the original Small Block so successful. Today, the introduction of state-of-the-art technologies and engineering makes one of the best performance car engines in the world even better."

As an example, the new LT1 engine is 40 pounds lighter than a competitor's twin-turbo 4.4L, DOHC V-8 with similar output. That weight savings not only improves the Corvette's power-to-weight ratio, but also contributes to a near-perfect 50/50 weight balance for enhanced steering response and handling.

The new LT1 is also four inches shorter in overall height than the competitive DOHC V-8. That also improves handling by lowering the center of gravity while enabling a low hood line – contributing to the Corvette's iconic profile, as well as ensuring exceptional driver visibility.

The new LT1 is the third engine in the Corvette's history to be so-named, with previous versions introduced in 1970 (Gen 1) and 1992 (Gen 2). All iterations of the LT1 – and all Small Block engines – have shared a compact design philosophy that fosters greater packaging flexibility in sleek vehicles such as the Corvette.

"The power and efficiency of the Small Block V-8 are hallmarks of Corvette performance," said Lee. "But, the compact size and great power-to-weight are just as important for the overall driving experience. The all-new LT1 will play a huge role in making the all-new Corvette a world-class sports car, in terms of technology, performance, and refinement."

Engine features and highlights
All-aluminum block and oil pan: The Gen 5 block was developed with math-based tools and data acquired in GM's racing programs, providing a light, rigid foundation for an impressively smooth engine. Its deep-skirt design helps maximize strength and minimize vibration. As with the Gen 3 and Gen 4 Small Blocks, the bulkheads accommodate six-bolt, cross-bolted main-bearing caps that limit crank flex and stiffen the engine's structure. A structural aluminum oil pan further stiffens the powertrain.

The block features nodular iron main bearing caps, which represent a significant upgrade over more conventional powdered metal bearing caps. They are stronger and can better absorb vibrations and other harmonics to help produce smoother, quieter performance.

Compared to the Gen 4 engine, the Gen 5's cylinder block casting is all-new, but based on the same basic architecture. It was refined and modified to accommodate the mounting of the engine-driven direct injection high-pressure fuel pump. It also incorporates new engine mount attachments, new knock sensor locations, improved sealing and oil-spray piston cooling.

Advanced oiling system, with available dry-sump system: The LT1 oiling system – including oil-spray piston cooling – was also optimized for improved performance. It is driven by a new, variable-displacement oil pump that enables more efficient oil delivery, per the engine's operating conditions. Its dual-pressure control enables operation at a very efficient oil pressure at lower rpm coordinated with AFM and delivers higher pressure at higher engine speeds to provide a more robust lube system for aggressive engine operation.

Standard oil-spray piston cooling sprays the underside of each piston and the surrounding cylinder wall with an extra layer of cooling oil, via small jets located at the bottom of the cylinders. For optimal efficiency, the oil jets are used only when they are needed the most: at start-up, giving the cylinders extra lubrication that reduces noise, and at higher engine speeds, when the engine load demands, for extra cooling and greater durability.

An available dry-sump oiling system promotes exceptional lubrication system performance during aggressive driving maneuvers and high cornering loads. It includes two stages: a pressure stage and a scavenge stage. The pressure stage includes the new, dual-pressure-control and variable-displacement vane pump.

Dexos semi-synthetic motor oil, with a 5W30 specification, helps reduce friction to further enhance the LT1's efficiency.

New, tri-lobe camshaft: Compared to the Gen 4 Small Block, the camshaft remains in the same position relative to the crankshaft and is used with a new rear cam bearing, but it features an all-new "tri-lobe" designed lobe which exclusively drives the engine-mounted direct injection high-pressure fuel pump, which powers the direct-injection combustion system. The cam's specifications include 14mm/13.3mm (0.551/0.524-inch) intake/exhaust lift, 200/207-crank angle degrees intake/exhaust duration at 0.050-inch tappet lift and a 116.5-degree cam angle lobe separation.

New, cam-driven fuel pump: The direct injection system features a very-high-pressure fuel pump, which delivers up to 15Mpa (150 bar). The high-pressure, engine-driven fuel pump is fed by a conventional fuel-tank-mounted pump. The direct injection pump is mounted in the "valley" between cylinder heads – beneath the intake manifold – and is driven by the camshaft at the rear of the engine. This location ensures any noise generated by the pump is muffled by the intake manifold and other insulation in the valley.

PCV-integrated rocker covers: One of the most distinctive features of the new engine is its domed rocker covers, which house the, patent-pending, integrated positive crankcase ventilation (PCV) system that enhances oil economy and oil life, while reducing oil consumption and contributing to low emissions. The rocker covers also hold the direct-mount ignition coils for the coil-near-plug ignition system. Between the individual coil packs, the domed sections of the covers contain baffles that separate oil and air from the crankcase gases – about three times the oil/air separation capability of previous engines.

Intake manifold and throttle body assembly: The LT1's intake manifold features a "runners in a box" design, wherein individual runners inside the manifold feed a plenum box that allows for excellent, high-efficiency airflow packaged beneath the car's low hood line.

Acoustic foam is sandwiched between the outside top of the intake manifold and an additional acoustic shell to reduce radiated engine noise, as well as fuel pump noise.

The manifold is paired with an electronically controlled throttle, featuring an 87mm bore diameter and a "contactless" throttle position sensor design that is more durable and enables greater control.

Four-into-one exhaust manifolds: The LT-1 uses a cast version of the "four-into-one" short-header exhaust manifold design used on the Gen 4 LS7 engine. The cast header passages enable consistent exhaust flow into the "wide mouth" collector at the converter.

Cooling system, humidity sensor and more: Additional features and technologies of the Gen 5 Small Block include:
• A revised cooling system with an offset water pump and thermostat for more efficient performance
• Air induction humidity sensor ensures optimal combustion efficiency, regardless of the surrounding air's humidity
• 58X ignition system with individual ignition coil modules and iridium-tip spark plugs
• All-new "E92" engine controller.

General Motors' investment in the Gen 5 Small Block will create or retain more than 1,600 jobs in five North American plants, including Tonawanda, New York, which recently received upgrades to support its production.

Founded in 1911 in Detroit, Chevrolet is now one of the world's largest car brands, doing business in more than 140 countries and selling more than 4 million cars and trucks a year. Chevrolet provides customers with fuel-efficient vehicles that feature spirited performance, expressive design and high quality. More information on Chevrolet models can be found at www.chevrolet.com.

[KissMyWhtSS]

Specs / Photos: (Click link below for photos)


Specs released:

Engine type: 90-degree V-8 with overhead valves; continuous VVT
Displacement: 6.2L (376 cubic inches)
Bore x Stroke (in / mm): 4.06 x 3.62 / 103.25 x 92
Cylinder block: cast aluminum with nodular main caps
Main bearing fasteners: six, including two cross-bolts per cap
Crankshaft: forged steel
Connecting rods: powder metal, 6.125 inches in length
Pistons: eutectic aluminum alloy
Compression ratio: 11.5:1
Cylinder heads: 319-T7 cast aluminum with 59.02cc combustion chambers
Valve angles (degrees): 12.5 intake, 12 exhaust
Intake valves: 2.13 inches (54mm) hollow
Exhaust valves: 1.59 inches (40.4mm) hollow sodium
Camshaft: Hydraulic-type with tri-lobe for fuel-pump drive
Camshaft lift: 0.551-inch (14mm) intake / 0.524-inch (13.3mm) exhaust
Camshaft duration: 200-degrees intake / 207-degrees exhaust (at 0.050-inch)
Lobe separation angle: 116.5 degrees
Fuel delivery: direct injection
Intake manifold: “runners in a box” design; composite construction
Throttle: 87mm electronically controlled throttle body
Ignition: 58X with individual coil-on-plug and iridium-tip spark plugs
Horsepower / kW: 450 / 335 (estimated)
Torque – lb.-ft. / Nm: 450 / 610 (estimated)
Max. engine speed 6,600 rpm (fuel cutoff)


http://www.lsxtv.com/news/breaking-news-chevy-gen-v-small-block-reveal/

[93M6Formula]

Hate to break it to ya, but this is literally the 5th or so thread on this lol.

[meissen]

I merged a bunch of the threads together.

[popo8]

I merged a bunch of the threads together.

Your the freakin best!! I looked at it, and went into the drop downs where we can do that.. and got SCARED>... thats why I just started putting all the links together....

Thank you bro!

[zooguy]

got SCARED

did i read that right .... popo got scared?

ah shit now we are all doomed

[popo8]

did i read that right .... popo got scared?

ah shit now we are all doomed


Yup... I was scared... care to test me? :)

[DMBlack]

them Coyote engines are actually bad ass.....


They are pretty bad but the name Coyote is pretty gay.

[Fastbird]

All I have to say is.......that "other" site and all the LSx fanboys can suck a dick. LT1 FTMFW Bitches! lmao, I jest I jest.

Good stuff. The new motor looks like it's gonna be a baaaaaaaad biotch. Some concerns I've got off the top are one, fuel system upgrades.......I'm pretty sure new higher flow injectors are going to be UBER expensive for those who need them. What kind of fuel pressures are the DI motors running too? Might be a total rethink of your typical fuel system there. 2. 2.13 factory intake valves? DAMN. And those intake runners........wowzers.

There's a whole lot to like in that new motor. Wonder which one of us here will be the first to drop one in our car?

[popo8]

For now they are only planning on having it in the vette? right?

[meissen]

Vette first, pickups next, my guess is that the Camaro will get it in 2015 for the 6th gen.

****DISCLAIMER: Everything stated above is my own opinion and is based on rumors found on the internet... my position at GM does not mean I have any privileged or proprietary information

On a totally different note, one of the guys on my site caught something with the engine tilt video posted by GM High Performance -- it appears to be the LT5, not the LT1, as there's a turbo in the picture. :banana:
http://static.motownmuscle.com/forums/files/24508872009f4f9.jpg

[Greg08]

Just saw this on Twitter . http://fb.me/1blrl2fld (http://t.co/kw2j212k)

I hate when they bring back old names for new engines or cars.


dammit u beat me to it! was gonna make a new post saying welcome a new LT-1 into the family :p

http://www.usatoday.com/story/driveon/2012/10/18/chevy-corvette-c7-detroit/1642647/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+UsatodaycomMoney-TopStories+%28Money+-+Top+Stories%29

[Greg08]

All I have to say is.......that "other" site and all the LSx fanboys can suck a dick. LT1 FTMFW Bitches! lmao, I jest I jest.

Good stuff. The new motor looks like it's gonna be a baaaaaaaad biotch. Some concerns I've got off the top are one, fuel system upgrades.......I'm pretty sure new higher flow injectors are going to be UBER expensive for those who need them. What kind of fuel pressures are the DI motors running too? Might be a total rethink of your typical fuel system there. 2. 2.13 factory intake valves? DAMN. And those intake runners........wowzers.

There's a whole lot to like in that new motor. Wonder which one of us here will be the first to drop one in our car?


that last sentence..

[BLK95-Z]

So now Im reading this new motor is completely un-tunable. GM did this for OUR safety....I guess with that kind of fuel pressure they dont want to chance any explosions. I think they did it to sell more lt4 motors that are rumored to be coming in the new z28's.

How long will it be before its hacked?

[BLK95-Z]

Copied from the other site.....

-----Allow me to explain why it will be tough to crack the ECM. The ECM uses a "public key encryption"/ Stateful connection to prevent tampering from gear heads. To better understand why it will be nearly impossible to crack. The ECM uses (TLS) transport layer protocol allows the ECM and fuel table applications to communicate across a data network via the internet back to GM in a way designed to prevent listening and tampering. This is for your protection and safety. The public key encryption on this ECM requires 2 keys. One to access the servers here at GM and once the integrity is validate then a second key encryption is provide to the ECM within the vehicle to allow diagnostics & restore of the fuel tables & fuel event system. Many of you will have questions about (YOUR PROTECTION). I will get in front of the ball and explain.

The ECM controls the exact point in time the fuel control solenoids closes. What this means you need a very fast computer to control the High Pressure Fuel solenoid cycles which is contained on the high pressure cam driven pump itself. (This ECM is basically a small PC with applications)

The ECM needs the crankshaft and cam position, fuel pressure sensor value to be
able to actuate/control the high pressure pump solenoid. This is dealing with the volume of fuel and all pressure at the same time. If the solenoid would remain closed at all time it would supply 2,175 psi all the time, which would cause all kinds of risk with the injection event. Resulting in total loss of the engine/vehicle.

The fuel system consist of low pressure side (pump in fuel tank) and High Pressure Fuel Pump (camshaft driven by lobe). The High Pressure Solenoid on the pump has zero errors. The ECM monitors the High Pressure Solenoid On/Off signaling duty cycles in real time as an added measure of security (VOLTS & AMPS). Thus this is the learning curve, reason for this is to actuate the fuel pressure control solenoid at a specific camshaft degree value of rotation learned. Self contained ECM system the system will lock if tampered the solenoid will remain open, fuel is then returned back to the fuel inlet and no pressure or volume will be seen. For your safety the engine will not start.

with regards,

Bigg_Gunz

[meissen]

That makes absolutely no sense to me. So we can tune DI v6 cars but not DI v8s?

[94Blackbird]

That makes absolutely no sense to me. So we can tune DI v6 cars but not DI v8s?


That's a load of bull honky. More than likely they did that for warrenty reasons, to make it easier to catch people who tune a car and swap tunes or even computers back when its time for some warenty work. Diesel guys have been controlling DI systems successfully for close to two decades.

[BLK95-Z]

That's a load of bull honky. More than likely they did that for warrenty reasons, to make it easier to catch people who tune a car and swap tunes or even computers back when its time for some warenty work. Diesel guys have been controlling DI systems successfully for close to two decades.

They are saying a stand alone computer to run this engine will never be available because its to expensive to research and mass produce.....and using the factory ecm is OUT. I guess well see....

[meissen]

I work at GM world HQ and know a handful of people who work at the powertrain building working on the new engines. I'll ask their opinion on it.

[BLK95-Z]

That would be awesome.... Id love to hear what someone on the inside says about it.

[Greg08]

my mazdaspeed 6 was one of the first cars to ever use direct injection, and we an tune it just fine!

[thunderkyss]

my mazdaspeed 6 was one of the first cars to ever use direct injection, and we an tune it just fine!

Is the fuel delivery system similar to the one on the new LT1?

[94Blackbird]

Is the fuel delivery system similar to the one on the new LT1?

It's not so much the mechanical part of it, it's the engine control unit. If I read the statement correctly, the ECU has to sync up with a server that GM is setting up, and then the command to allow the ECU to be unlocked will be sent from that server. GM is trying to completely tamperproof the ECU so that it can't be messed with. It's not the fuel system itself, it's the Engine controller.

[meissen]

I questioned the guy more on that other site's thread. He said it's not always checking, only when you go in for warranty work or diagnoses... That to me sounds like it can be tuned perfectly fine, it just means they'll really know if you tamper with it. If that's the case, it's nothing really new - it's just that they may have "perfected" or believe they have a PCM that can't be tuned without GM knowing. It just means if you want to have your car tuned you'd need two ECMs - the stock one with a stock tune and then a second one with the aftermarket tune.

[GreenZ96]

I wonder if it will be offered up as a crate motor in the near future, or if one would have to wait and pick one up from a parts yard or part out.

[thunderkyss]

I guess I missed the first discussing. I know this has nothing to do with the LT1 as we know it, I just can't stand the lack of creativity. Of all the letters in the alphabet why do you have to reuse the same combinations. At least they aren't calling Coyotes or anything gay :laugh:

hmmm..... they've reused Z28, Z27, Z21 forever & the cars rarely have anything in common. For the most part, the Z28 has been corner carving sportscar, the RS has been an appearance package, & the Super Sport was a drag strip beast. But this new SS, the 5th gen... it's got a suspension package you'd think you'd see on a Z28.

LT1 just meant high performance engine.

[Greg08]

Is the fuel delivery system similar to the one on the new LT1?


The mazda 2.3 DISI engine is direct injection
http://www.mazda.com/mazdaspirit/env/engine/disi2.html