Magna's New engine

[Philbie]

This artical taken from a news source today....

10th June, 2005




The PS41 (new Magna) Engine Sounds Sweet
to Both Driver and Environment




In its mission to develop ‘the best quality car ever built in Australia’, Mitsubishi Motors Australia Limited (MMAL) yesterday revealed crucial aspects of the new PS41’s new engine.

Slated for an October 2005 launch, the PS41 offers strongly competitive power and performance features, while being the first Australian-built car to meet the new Australian environment regulations.

“The PS41’s 6G75 engine is an almost total redesign of the 6G74 engine used in the XR Magna, but retains the strengths of the basic architecture of its predecessor,” says Tom Phillips, President and CEO, MMAL. “Through painstaking development and precise application of the most advanced management system, the PS41 engine provides the necessary durability to support our 5/10 warranty.”

Engineered for Australians, the new Mitsubishi 6G75 is a 3.8 litre SOHC 24-valve MPI V6 engine. This efficient design with a state-of-the-art engine management system incorporates only 10% carry-over parts from the former 3.5 litre engine, and eliminates complications, such as double overhead cams, variable valve timing, variable intake manifold, secondary air system and an EGR system.

The result is an engineering achievement without frills, enabling MMAL to focus customer value onto other design areas, such as the advanced trims and finishes.

An Engine of Unprecedented Innovation
Powerful…torquey…responsive…intuitive….these are only a few of the adjectives that accurately describe the PS41’s V6 engine redesign – an engine that uses technology not found in any other Mitsubishi car.

New engine developments include:

Control Area Network (CAN): The PS41 is the first locally-built Mitsubishi to use Control Area Network (CAN) to link all major electronic control modules. It is a system of multiplexing information between electronic controllers, dramatically accelerating communication and reducing the number of wires.

The returnless fuel supply system: Designed to reduce heat build-up in the fuel tank, it results in less vapour fuel emissions from the tank.

12-hole injector: Allied with the returnless fuel system, the high technology 12-hole injector is a crucial component to meeting the new Euro3 regulations and offering smooth driveability. It delivers a fine atomised spray pattern with a much smaller droplet size of 60-70 microns, almost vaporising the fuel.

Fuel pump module: The new design integrates the pump, fuel filter, pressure regulator and fuel-gauge sender into one assembly, easing quality control of these critical components.

Engine Management System (EMS): One of the most significant features of the new PS41 engine is the Engine Management System developed collaboratively with Robert Bosch and extensively tested in Australia, Japan, Germany and Switzerland. The major benefits derived from the system result from the highly efficient ‘torque-demand’ method of choosing the instantaneous settings for the engine variables, such as throttle valve position, injection time and ignition timing. Compared to a conventional system, with its computing power used up in deciding how to manage uncoordinated interactions between separate inputs, this system gives precise torque control in response to driver and system demands to give unparalleled drivability under all conditions.

Valve Springs: MMAL applied Ralliart valve springs to the camshaft profile from the Ralliart Magna to ensure valve control and durability at the increased lift and high rpm. Wound from a special section-shaped wire, and then treated with shot preening and nitriding, the valve springs offer ultimate fatigue strength.

Existing 6G74 engine strengths that have been incorporated into the 6G75 redesign include:
- Compact combustion chamber shape
- Centrally located sparkplug
- Tapered intake ports with smooth change of direction onto the valve seat and downdraft
- Low inertia rocker arms made from aluminium and a Y-shaped rocker arm
- Low friction needle roller cam followers
- Maintenance-free hydraulic valve adjusters

Outside the base engine:
- The intake system has been designed to draw air from between the hood & grille for improved performance due to the density of the cold air and the ramming effect at higher speeds
- The intake hose between the airflow sensor and the throttlebody, improves air flow because of its increased diameter
- The filter material is a new non-woven formulation, which has a lower pressure drop than alternatives with comparable filtering and dust-holding capacity
- One quarter-wave-side-branch resonator and three helmholtz resonators are tuned to reduce exterior and unwanted cabin noise
- The air intake hose is made from lead-free TEO, instead of ECO

The PS41 Accelerates its Environmental Standards
The other driving force behind the PS41’s engine redevelopment is the introduction of stricter Australian regulations. Currently all Australian car models are required to comply with ADR 79/00 - the equivalent of Euro2. From January 2005, all new model, petrol passenger cars are required to meet ADR 79/01 – or the equivalent to Euro3.

This new regulation requires a vehicle to have On Board Diagnostics (OBD) that self-detect, at a minimum, any event that would lead to tailpipe emission failure due to:
- A reduction in catalytic converter efficiency
- Deterioration of an oxygen sensor
- Deterioration of any other emission-related powertrain component
- Engine misfire
- An emission-related electrical circuit continuity problem.


In the event that any of these problems occur, the driver must be informed by means of a Malfunction Indicator (MIL) or malfunction indicator lamp. Additionally, the system must store fault codes to assist in subsequent diagnosis and repair.

To prepare the engine to meet the new emission targets, special attention has been paid to reduce the areas in which hydrocarbons can hide from the advancing flamefront during combustion. After extensive testing, MMAL has reduced:
- The top ring land height
- The top ring land clearance
- The head gasket thickness
- The head gasket bore


These measures have resulted in a total reduced crevice volume, and thereby lower unburnt hydrocarbons to be attended to by the emission control system.

Additionally, the PS41 complies with the new noise regulation – the ADR 83, which mirrors the existing European standard. The new standard requires the PS41 to meet a 3dB lower limit. This new noise limit reflects a 50% reduction in sound power over the previous ADR 28 noise regulation.

The PS41 is the first Australian manufactured vehicle to comply with both the new emission and noise standards, while it’s totally new sweet sounding 3.8 litre engine has all the power, torque, flexibility, responsiveness, driveability and fuel economy to satisfy the toughest demands of Australian drivers.

[MITCHAY]

None of that made any sense to me lol. I doubt highly it would even compare to a commodore or a falcon. Never been a fan of any mitsubishis though.

[Citric GT]

Sounds promising. They just need to get the styling right (and maybe rear wheel drive!).

[MITCHAY]

Originally Posted by Citric XR6

Sounds promising. They just need to get the styling right (and maybe rear wheel drive!).

Yeah i cannot understand for the life of me why theyve been FWD. I mean is it just me but do magnas seem just a little to big to be without RWD.

[Citric GT]

Originally Posted by MITCHAY

Yeah i cannot understand for the life of me why theyve been FWD. I mean is it just me but do magnas seem just a little to big to be without RWD.

Excactly. I know heaps of people who would buy one if they were rear wheel drive. Theres 3 Magnas in my family and they are all better built cars than any of the Falcons/Commodores we've had BUT they're driven from the wrong end.

When you line up my 98 Falcon to my dads 98 Magna you wouldn't believe how much better built his car is. I still rather my V8 rear drive though:sm_headba

[Biggoggs]

Originally Posted by Citric XR6

When you line up my 98 Falcon to my dads 98 Magna you wouldn't believe how much better built his car is. I still rather my V8 rear drive though:sm_headba

Definately- a '98 Magna makes like 140kw from a 3.0i. The specs might suprise you :
It seems Mitsu keep the Magna in the cheaper-to-run large family vehicle market. Would it even compete with Ford and Holden if it was RWD?

Notice Holden goes high tech & reduces size, Ford also goes high tech but retains size, mitsubishi goes low tech & increases size. What is Toyota going to do?

High tech, retain size? Although with the Supra, they upped the tech, made it bigger, and turbocharged it

[MAD]

Interesting how they have taken a backward step in some areas to meet the new, more stringent rules.

They may be ugly, but the old 3.5 isnt exactly a slouch.

[AUXRVIII]

Originally Posted by MADXF

Interesting how they have taken a backward step in some areas to meet the new, more stringent rules.

They may be ugly, but the old 3.5 isnt exactly a slouch.

What do you mean?

[johnydep]

Originally Posted by Philbie

Engineered for Australians, the new Mitsubishi 6G75 is a 3.8 litre SOHC 24-valve MPI V6 engine. This efficient design with a state-of-the-art engine management system incorporates only 10% carry-over parts from the former 3.5 litre engine, and eliminates complications, such as double overhead cams, variable valve timing, variable intake manifold, secondary air system and an EGR system.

The result is an engineering achievement without frills, enabling MMAL to focus customer value onto other design areas, such as the advanced trims and finishes.

An Engine of Unprecedented Innovation........

..........12-hole injector is a crucial component to meeting the new Euro3 regulations and offering smooth driveability. It delivers a fine atomised spray pattern with a much smaller droplet size of 60-70 microns, almost vaporising the fuel.


The other driving force behind the PS41’s engine redevelopment is the introduction of stricter Australian regulations. Currently all Australian car models are required to comply with ADR 79/00 - the equivalent of Euro2. From January 2005, all new model, petrol passenger cars are required to meet ADR 79/01 – or the equivalent to Euro3.

..............

Sounds like they have backward engineered a very high tech motor, for three reasons;
1) to suit the demands from Aussie customers for low cost maintenance & repairs,
2) money saved on double overhead cams, variable timing, etc. can be spent where most people will see it, exterior & interior.
3) Durability for that extended warranty they offer.

I thought the Barra 6 met Euro 3 standards, or is that only Euro 2?

Wonder what the torque & power specs are?
Have they increased the size of the motor to keep power specs similar to the more high tech 3.5L?

Notice Holden goes high tech & reduces size, Ford also goes high tech but retains size, mitsubishi goes low tech & increases size. What is Toyota going to do?

[smoo]

Originally Posted by johnydep

Wonder what the torque & power specs are?
Have they increased the size of the motor to keep power specs similar to the more high tech 3.5L?

They increased the size to take it to the Alloytech and Barra, so it should have at least 180kw. Maybe Ralliart will do the mivec and dohc etc job on it and come up with a less ugly AWD one.

[MITCHAY]

Holden have decreased the engine size from 3.8 to 3.6l on the base models. Id imagine even if it was 180kw in a FWD mode in a big car like a magna it would do little.

[smoo]

Originally Posted by MITCHAY

Holden have decreased the engine size from 3.8 to 3.6l on the base models. Id imagine even if it was 180kw in a FWD mode in a big car like a magna it would do little.

Would you say the same about the current Maxima... They're good for a 7.0sec 0-100, with about 175kw I think
If this new Magna is 180+kw its biggest problem will probably be getting traction, especially with a 5spd auto :

[MITCHAY]

Originally Posted by smoo

Would you say the same about the current Maxima... They're good for a 7.0sec 0-100, with about 175kw I think
If this new Magna is 180+kw its biggest problem will probably be getting traction, especially with a 5spd auto :

Yeah the Maxima runs a detuned 350Z (VQ35) engine. I reckon Nissans are way better than Mitsubishis.

It would have been smarter making a 4cylinder version as well, they don't seem to understand they are never going to do well against the RWD cars no matter how much marketing they use.

[johnydep]

Originally Posted by lizardmech

It would have been smarter making a 4cylinder version as well, they don't seem to understand they are never going to do well against the RWD cars no matter how much marketing they use.

I thought the same thing, but Mitsubishi had a hell of a time trying to sell their last model with a 4 cyl. It was a 2.4L, I almost bought one for the missus, so had a good look at them a while back, rare as hens teeth now.

[Citric GT]

Yeah, a good 4 cyl wouldn't go astray. Something to compete with the Camry. I bet Toyota weren't too upset when Mitsu' stopped making them.

[LG]

I can see myself in an AWD Magna, later on down the track... I'm a bit of a fan.

I hope they get some extra grunt!

[Jamie XR6]

Originally Posted by LG

I can see myself in an AWD Magna, later on down the track... I'm a bit of a fan.

I hope they get some extra grunt!

I have to admit so am I.

Whilst there is no way I'd trade my XR6T on one, I'd like to get back into an AWD car again and I'd like something bigger than an STi. Maybe a good looking Galant could be just the thing.

Now if Ford was to get their act together.........

[BuuBox]

Sounds like a lot of **** to make it sound more than a 300cc displacement increase.

[Olympus]

Being a Mitsies worker myself and having seen the new Magna, I can honestly say that it is one big jump ahead from the current model.
It's a beautiful car and I might even consider leasing one this time.

[Bossxr8]

Originally Posted by Philbie

The PS41 Accelerates its Environmental Standards
The other driving force behind the PS41’s engine redevelopment is the introduction of stricter Australian regulations. Currently all Australian car models are required to comply with ADR 79/00 - the equivalent of Euro2. From January 2005, all new model, petrol passenger cars are required to meet ADR 79/01 – or the equivalent to Euro3.

This new regulation requires a vehicle to have On Board Diagnostics (OBD) that self-detect, at a minimum, any event that would lead to tailpipe emission failure due to:
- A reduction in catalytic converter efficiency
- Deterioration of an oxygen sensor
- Deterioration of any other emission-related powertrain component
- Engine misfire
- An emission-related electrical circuit continuity problem.


In the event that any of these problems occur, the driver must be informed by means of a Malfunction Indicator (MIL) or malfunction indicator lamp. Additionally, the system must store fault codes to assist in subsequent diagnosis and repair.




Additionally, the PS41 complies with the new noise regulation – the ADR 83, which mirrors the existing European standard. The new standard requires the PS41 to meet a 3dB lower limit. This new noise limit reflects a 50% reduction in sound power over the previous ADR 28 noise regulation.

The PS41 is the first Australian manufactured vehicle to comply with both the new emission and noise standards, while it’s totally new sweet sounding 3.8 litre engine has all the power, torque, flexibility, responsiveness, driveability and fuel economy to satisfy the toughest demands of Australian drivers.

A few points I noticed in this article.

1- How can Mitsubishi claim it is the first engine to comply with Euro 3 when it isn't even on sale yet, and may be beaten to market by the updated Falcon.

2- If cars that comply to Euro 3 must have a diagnostic system that can tell if emissions may be affected by a malfunction in the cats etc. how will this affect anyone who performs mods on their car via an exhaust etc. If you change your cats will it keep putting on the engine warning lights and log fault codes etc.

3- Noise regs regarding the Falcon and Commodore V8's, if they have to be 50% quieter than they are now does this mean they will have more restrictive exhausts and lower power? Interesting times ahead. I'd imagine buying stock in aftermarket exhaust companies would be worthwhile.

[gtfpv]

Originally Posted by Bossxr8

A few points I noticed in this article.

1- How can Mitsubishi claim it is the first engine to comply with Euro 3 when it isn't even on sale yet, and may be beaten to market by the updated Falcon.

2- If cars that comply to Euro 3 must have a diagnostic system that can tell if emissions may be affected by a malfunction in the cats etc. how will this affect anyone who performs mods on their car via an exhaust etc. If you change your cats will it keep putting on the engine warning lights and log fault codes etc.

3- Noise regs regarding the Falcon and Commodore V8's, if they have to be 50% quieter than they are now does this mean they will have more restrictive exhausts and lower power? Interesting times ahead. I'd imagine buying stock in aftermarket exhaust companies would be worthwhile.

point 3 here is the reason i bought the mkii gt . after jan 2006 the exhaust noise will come down 50% that is 25% of the legal US noise limit.
GET YOUR EXHAUST MODS DONE THIS YEAR BOYS AND GALS BEFORE THEY BECOME ILLEGAL.

[johnydep]

Originally Posted by Bossxr8

A few points I noticed in this article.

1- How can Mitsubishi claim it is the first engine to comply with Euro 3 when it isn't even on sale yet, and may be beaten to market by the updated Falcon.

2- If cars that comply to Euro 3 must have a diagnostic system that can tell if emissions may be affected by a malfunction in the cats etc. how will this affect anyone who performs mods on their car via an exhaust etc. If you change your cats will it keep putting on the engine warning lights and log fault codes etc.

3- Noise regs regarding the Falcon and Commodore V8's, if they have to be 50% quieter than they are now does this mean they will have more restrictive exhausts and lower power? Interesting times ahead. I'd imagine buying stock in aftermarket exhaust companies would be worthwhile.

1- good point.

2- The diagnostics is there only to warn of failed sensors, changing a cat or exhaust system will not have any effect. Installing larger injectors or changing cams may cause the diagnostic system to record faults if the ideal fuel ratio of 14.7:1 is too far out of wack, but if you do that you'll more than likely have it re-chiped anyway.

3- A good system does not have to be restrictive to minimise sound, it will need to be better designed from front to back & use bigger mufflers & have harmonics absorbers attached, this will make for very pricey exhaust systems. Have a look under some of the newer Euro cars & price up one of those systems.

[BuuBox]

I find it ironic that it's now the least advanced engine design in an Australian manafactured car, especially considering engine advancement and refinement was once a strong selling point.

[johnydep]

Originally Posted by BuuBox

I find it ironic that it's now the least advanced engine design in an Australian manafactured car, especially considering engine advancement and refinement was once a strong selling point.

aah, you've forgotten about the Holden V8, still using push rods isn't it?

Mitsubishi Australia may have found other ways to make it produce more power economically & smoother.
I'd like to see the power, torque & fuel figures.

[BuuBox]

I was talking about the highest volume engines, and besides... Mitsubishi don't even have a V8 option, or any other engine option for that matter.

I don't think the torque output will be of much surprise, especially with the issue of getting the power to the ground. But then, I've been surprised in the past.

[johnydep]

Originally Posted by BuuBox

I was talking about the highest volume engines, and besides... Mitsubishi don't even have a V8 option, or any other engine option for that matter.

Yes I know, I was just having a dig at the GM V8. :

Originally Posted by johnydep

Yes I know, I was just having a dig at the GM V8. :

Whats wrong with the GM LS V8s? They are lighter, cheaper to build, as powerful as the boss engines and more powerful than many european engines.

[johnydep]

Originally Posted by lizardmech

Whats wrong with the GM LS V8s? They are lighter, cheaper to build, as powerful as the boss engines and more powerful than many european engines.

Nothing wrong with the LS V8, I like them and I hope GM will keep it around for a long time.
For simplicity and cheapness of repairs you can't go past a pushrod engine, just don't expect it to sound sweet when over revved.

But they are starting to become harsh compared to the new OHV engines being released, ask a few V8 Commodore owners about noise & oil consumption problems.

http://www.canadiandriver.com/articles/jk/040421.htm

So it would seem the pushrod engine wins because it is simpler, but there are drawbacks. The more an engine "breathes" (gets air in and exhaust out) the more power it can develop. Cylinder head ports or passages on pushrod engines are always a compromise because the ports have to be placed to allow room for pushrods to pass though the head. Airflow may not be optimum.

There are also more parts to move when the valve opens. The weight of pushrods, rocker arms and lifters has inertia at higher rpms so they may start to bounce and the valves "float". Valve float is when the valves don't close properly and the engine misfires. Engine power drops immediately and a piston may hit a valve, bending it. Severe engine damage could occur. Redlines on vehicle tachometers are there to help prevent valve float.

Overhead camshaft engines have fewer and lighter valvetrain components to move. This allows the engine to have a higher redline before valve float occurs. The faster an engine turns, the more power it can develop in a given time. Another advantage is that cylinder head passages can be placed for the best airflow. Holes for the pushrods are not required, although oil drainback holes will be cast in places where they don't interfere with airflow.

Overhead camshaft engines can produce higher performance but typically cost more to build. Pushrod engines are cheaper to build and work on. Many engines use overhead camshaft designs because the optimum cylinder head design allows for increased fuel economy and performance too. Most high performance vehicles are using overhead camshaft designs but then Corvette comes along again with their pushrod V8. Thirty-five miles per gallon and four hundred horsepower out of a pushrod engine show they can't be that bad!

Back on topic; And I think that is why Mitsi have decided to make their latest engine less complex - savings on production, savings on repairs, savings on maintenance. This will benefit the customer when purchasing & servicing, and benefit Mitsi with increased reliability & less warranty claims.

Having no variable valve timing, variable intake manifold, secondary air system will mean less power per litre, so they have increased the engine size to make up for it.
Anyone got the power figures yet?

[saturnine_07]

they are going to make a super charged version too... probably throw it in the VRX or whatever