The ebst description I have seen was in the mags about the time the new Audi a-6 came out. It's VERY high pressure sprayed into the combustion chamber directly. They can acheive much more desirable AF ratios with the high pressure spray apparently. That's the finance guy version.

 

Direct Injection, DI, brings control of the atomised charge to the cylinder. History- replacing a carb was the throttle body injector- one injector feeding all the cyls from a distant point where the carb used to go. Multi-port increased charge control by having each port (for each cyl) sprayed individually, but still nowhere near the cyl. DI has injectors in the cyl, like a diesel engine, operating at very high pressures, say 20K psi or so, blasting exactly what the cylinder needs each firing, to optimise combustion. Until now, despite the fact that the idea has been around a long time, it has not been used because those individual pumps and their electronic control have not been cost-effective and reliable. Control must come via more complex combustion maps and feedback loops.
Going one step further, BMW is developing a valve sytem not requiring cams. Electrohydraulic control of the valves (little, really effin fast motorised lifters)while currently not saving any significant weight, will allow complete control of valve timing and lift, to boot. Combining these technologies would result in more torque (max), broader torque spread, higher hp numbers, increased durability and reliability (every slightly mis-timed firing of a cyl reduces its life expectancy), and modifiability/tunability of these regimes i.e. go to your dealer/aftermarket and say, "dude, I haven't let the tach get below 6K since I owned this baby, change my envelope to something more up top and peaky", or "hey, I prefer short-shifting, gimme some more on the bottom." Unlike now, where a bit of that is possible, you won't need to rob Peter to pay Paul until you're right out at the envelope edges.

Hope this helps.

Cheers,
D

 

Please please please get better gas mileage. Sedan and coupe.

 

go to automobilemag.com and there is a picof the 08 g35 on the detroit auto show section for 2007 future cars

 

Question....

Ok, so we know the "New Coupe" is scheduled as a model year '08 to debut late '07. We believe that it's going to have more horsepower (around 330hp)

We also know that the "New Sedan" is coming late '06 as an '07 model year.

Here's my Question....

Will the "new sedan" coming out 1 year ahead of the "new coupe" be equipped with more horsepower than the current coupe?

It makes sense because it will be the new body and everything, but also it doesn't make sense because would Infiniti really sell their sedan with more power than its coupe counterpart for that short window of time? (1 year)

Anyone else ever think about this?

 

I don't think they'd be too worried about that.
It's more important to get ahead of the other sedans out there.

 

Doubt the sedan will come out before the coupe, for just that reason.
See other post on this subj, but there is some conflicting info there.
I would suggest that stuffing all the ideas into a blender, it comes out:
coupe, sedan, GTR. One thing we haven't seen on the boards is the requisite update to the 350Z that will surely be a factor. Also important to note that Nissan will be introducing the Infiniti marque to Europe for the upcoming model year (at least that's the plan).

 

hmmm i think im gonna have a tough choice in 2008

Infiniti G35 Coupe??
BMW 335 Coupe??
Lexus IS350 Coupe??

 

Which one gonna be your best value???? I think the Infiniti coupe will always be the value leader

 

I seem to have addressed the faults they mentioned on my car. Most of the complaints made about the X apply to the rear drive G as well.

Rear end comes unglued over bumps in turns? Hotckis Sway on the rear set to medium helps keep the rear settled very nicely..viola no more problem.

Engine a bit rough - 10 wire grounding kit smooths it out even as the exhaust changes rough up the sound a bit. - no more problem. Solvable problems are better than being slow like the BMW and Lexus. The most fun car though surely would be the Legacy. I believe they did a good comparo.

 

Do you think it could retain the current refinement and noise levels if displacement increases to 3.8L? Have you experienced the 4.0L VQ in the Pathfinder, Xterra or Frontier? My guess is that it will stay at 3.5L.

 

Keep in mind the original sedan came out about 6 months before the original coupe. Everything is pointing towards a similar roll out of the new models... sedan first, then coupe.

 

http://en.autos.sympatico.msn.ca/adv...home&pos=Edit3

KBB, Forbes, and Edmunds seem to agree with you. I don't see the sedan in the list at the link above.


Cheers,
Derek

 

I guess you missed the part

"...See other post on this subj, but there is some conflicting info there..."

Sorry, but by "everything" you mean?
Because the sedan concept was shown first? [nope, that can't be it].
Because at the Toronto Show the leaflet indicated a fall release for both?
Because the original coupe was released within 4 months of its show debut?
Really? Everything?


Cheers,
Derek

 

"Everything" meaning reputable media sources, not your guess. Media sources such as Edmunds.com. Just Google "2007 Infiniti G35", and you'll find press releases regarding the unveiling of the 2007 G35 sedan at the NY Auto Show in April.

By the way, the original 2003 coupe shown at auto shows was a production model, not a concept. The coupe shown at Detroit this year was a concept showing the probable direction of the next generation coupe.

Cheers and talk to you in April.