I'm no expert but I assumed you still used injectors and could just swap to larger ones. Then your only limit is the flow rate of the fuel pump itself.

Maybe the 40th anniversary model will get the direct injection when in comes out in Jan? The 35th anniversary model got the new v6 while the other z didn't until the following year.

2012 model with had D.I. the nismo model will also have the D.I. but that is all

Yea I agree here it said the Z would have it for its refresh. Which about 3 years so that means the new G's will probably have about the same performance numbers as the Z when they get D.I.

In three years it will be time to purchase a new Z anyway :) I had my last vehicle for 1 year 9 months lol.

:iagree: 4 years or about 50K miles and I will be ready just as well.

If the same fuel pump woes follow the Z with direct injection then I am happy not to have it. I kept waiting for the fuel pump to fail on my 335.

Direct Injection is fantastic. High fuel pumps and upgrades galore. This is old technology....surprised this is not on an 09 vehicle at this point in time, especially such vehicles as the Z. I would be surprised if this is not include in the 2010 model year.

I agree it should of came with it. Hopefully it will come in the 2010 model.

My Mazdaspeed6 was DI. I wasn't impressed (at least not by the fuel system).

Nissan Green Program 2010
Green Car Congress: Nissan Announces Green Program 2010; Aggressive Plan Includes Clean Diesel, Fuel Efficiency, Hybrids, Plug-in Hybrids and EVs

"Combining direct injection gasoline engine with Variable Valve Event & Lift System (VEL) for V6 and V8 engines."

I'm patiently waiting for DI and more aftermarket offerings

It keeps the fuel spread out nearly perfectly in the cylinder, encouraging more complete combustion, which increases efficiency in the sense of more power (since more fuel burns) and cleaner exhausts (since more fuel burns). This is versus mixing fuel into the air at the throttle body area (well, a bit more past it). Fuel can "clump" so there are concentrated pockets of air and fuel mixtures, making combustion uneven and inefficient.

In general, it is significantly easier (chemically / stoichiometrically) to burn perfectly vaporized fuel than if were in a liquid state. Gasoline aerosolizes in air though, so it's difficult to observe in real time.

Direct injection is damn near the best thing you can get in any engine. But as mentioned before, a bad fuel pump or atomizer / injector will ruin any possible horsepower gain.

A good DI system provides good gains across the band, but particularly in high RPM ranges, giving good top end power (obviously, fuel has less time to spread out, so a good injector can do this better than a premixed engine, like the sequential mixer we have in the VQ37VHR).

Special Tax Break Available for New Car Purchases This Year

thats for the tax break.

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.

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.