Direct Injection!

Island_370

Audi (and others, I believe) have noticed some issues with direct injection. Without fueling going over the valves, nothing is "washing" them. Some of the Audi FSI (direct inj) motors are having valve issue. The build up is likely realed to the PCV, the EPA requires the motors digest the crankcase vapors. So I am not too excited to get a direct inject motor until these issues are resolved....be it valve coatings, secondary injectors in the intake, "scheduled" seafoam treatments....something.

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Mr. C

Nissan Introduces New Dual Injector System - Worldcarfans
Nissan introduces a dual injector solution for small motors. On sale in the 2010 fiscal year

Nissan needs to hurry up and release DI for the V6! I hate waiting.

avitech

This is bad news. Because Nissan is going for a cheaper approach instead of offering Direct Injection that increases efficiency by up to 20% instead they offer us just a fancier injector that splits the fuel two ways for an increased fuel economy of a measly 4%. Shame shame shame. It's like buying an air to air heat pump for your house instead of a fancier geothermal heat pump which is far superior. It costs more up front but saves you money in the long run. Nissan is going the cheap route. I wonder when they will ever join the ranks of automobile manufacturers with D.I.? Shirley they won't be the last to adopt it will they? It's like being the last car company to adopt fuel injection instead of carburetors. Progress is slow...

kevr6

Plan to have scheduled induction services if you want Stratified Injection. Misfires become a way of life with this continents fuel quality!!
(VW/Audi Invention!)

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nicknick

From what i havevread on the net (bitog) direct injection ,while increasing power etc, really causes problems like very dirty engine internals. there was Porsche Cayenne v8 engine that looked like it was dead due to the amount of carbon buildup and it also affects Audis too. So I am not too upset that Nissan did not offer this new tech. Maybe it needs more work before Nissan will use it.

baboola

carbon buildup is a known problem for all DI engines (porsche, bmw, audi, vw...), but for some reason it doesn't happen to all of them. obviously it didn't stop nissan form putting DI into G37. i guess the power gain and better fuel economy/emission justify the number of potential engines they have to clean out. hopefully they'll have a fix by the time nissan puts it in Z

tvfreakazoid

G37 uses DI? Didn't know that. I wonder why they didnt put it in the 370Z. It's the same engine. I wonder how much HP gain it will get.
If 370z ever gets the DI, it would probably be around 2012. To bad they don't do it now.

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Mudders milk

avitech

It would be nice if Nissan would offer the 370Z with Direct Injection. What I would like to know is how it would be assimilated into the current V6 design. It might be as simple as keeping everything else but designing a whole new cylinder head(s) and engine fuel management system. Who really knows what they are up to. For all we know they are doing beta testing right now as I type in some laboratory in Japan. I could try calling the 800 number for Nissan customer service but the girl on the other end of the line usually doesn't know anything about the products. When they do add the Direct Injection. That's going to be the time to buy. If I were to get one now I would just lease since it's not D.I.. The future is in Direct Injection. The oil companies are reformulating their gasoline for it at the present moment. If they can make this work it would mean less pollution, more fuel efficiency, more horsepower, longer engine life, and money savings. It's a win win situation for everybody.

shumby

no DI on the G where did you hear that from?

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Originally Posted by SAM@GTM
Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living .
Sam

baboola

G37 gets DI 2010

i noticed that my wording may have been ambiguous. i meant to say that it didn't stop nissan from making the decision to put DI on G37

gumpy

will you be able to buy a new engine and put it into the current z?

i'd really like DI, esp if the engine sounds better as well...

Daishi

the engine wont sound better with DI.. generally all the vw's and cars with DI sound broken with all the loud ticking the DI injectors produce haha.

gumpy

my dad's R36 doesn't tick at all... the engine sounds quite good actually...

i should see if there's a way to get that engine in the z =)

GTRFAN

Nissan should just get on with it and make the 400ZX turbo! Now that'll be worth upgrading to.

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My Zed

spearfish25

Holding out for direct injection is ridiculous. Get some bolt ons, you'll make the same hp and have the car now.

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2013 Cadillac V-Wagon, RIP Z