Little help
Senior Member
Joined: Oct 2009
Posts: 1,432
Beleave you posted same in facebook 5thgen org...i have no idea what you askin either n why ur askin.
the injectors directly inject fuel to each cyl so yes its direct injected jus like EVERY car these days n she make N/A power yes.
The motor is Naturally Aspirated N/A and so is EVERY maxima until you Turbo it or supercharge it then its Forced Induction i beleave.
am i right guys?
the injectors directly inject fuel to each cyl so yes its direct injected jus like EVERY car these days n she make N/A power yes.
The motor is Naturally Aspirated N/A and so is EVERY maxima until you Turbo it or supercharge it then its Forced Induction i beleave.
am i right guys?
Last edited by TravisCadello; Jun 20, 2013 at 09:24 PM.
Some clarity would be nice.
While fuel is directly injected into the cylinder versus throttle body injectio or carbarator.....direct injection is also a term used to describe one method of the firing of injectors. For example, you have direct and you have sequential injection. Direct injection means all injectors open and release fuel into the cylinder at the same time regardless where all the pistons are at the time. Sequential injection means that each injector operates independently and opens specifically when it's assigned cylinder is ready for fuel.
To throw a wrench into this, some cars (like the 3rd gen maxima) use both direct and sequential injection methods. On startup, all injectors open and insert fuel at the same time. After the engine begins to combust fuel....to start....the ecu changes over to a sequential injection method.
As far as I know, the 5/5.5 gens operate solely on a sequential method. However, I honestly am not sure.....could be like the 3rd gen. I leave that to someone who either knows or cares enough to research.
Naturally aspirated (n/a) is a term which is used essentially to describe how air enters the combustion chamber. It indicates the engine breaths on its own, it utilizes the pistons to draw air into the combustion chamber, so it naturally feeds itself.
The typical standard alternative to N/A would be boosted. This means the engine does not breath on its own, rather a mechanism (turbo or supercharger) pulls in outside air and "forces" it into the combustion chamber, adding the benifit of compressing greater volume of air into the cylinder than could be accomplished with a N/A setup.
Now, I've said all that but still have no clue if any of that is even what you're trying to ask.
While fuel is directly injected into the cylinder versus throttle body injectio or carbarator.....direct injection is also a term used to describe one method of the firing of injectors. For example, you have direct and you have sequential injection. Direct injection means all injectors open and release fuel into the cylinder at the same time regardless where all the pistons are at the time. Sequential injection means that each injector operates independently and opens specifically when it's assigned cylinder is ready for fuel.
To throw a wrench into this, some cars (like the 3rd gen maxima) use both direct and sequential injection methods. On startup, all injectors open and insert fuel at the same time. After the engine begins to combust fuel....to start....the ecu changes over to a sequential injection method.
As far as I know, the 5/5.5 gens operate solely on a sequential method. However, I honestly am not sure.....could be like the 3rd gen. I leave that to someone who either knows or cares enough to research.
Naturally aspirated (n/a) is a term which is used essentially to describe how air enters the combustion chamber. It indicates the engine breaths on its own, it utilizes the pistons to draw air into the combustion chamber, so it naturally feeds itself.
The typical standard alternative to N/A would be boosted. This means the engine does not breath on its own, rather a mechanism (turbo or supercharger) pulls in outside air and "forces" it into the combustion chamber, adding the benifit of compressing greater volume of air into the cylinder than could be accomplished with a N/A setup.
Now, I've said all that but still have no clue if any of that is even what you're trying to ask.
Thread Starter
Junior Member
Joined: Mar 2013
Posts: 35
From: Aurora, Colorado
Some clarity would be nice.
While fuel is directly injected into the cylinder versus throttle body injectio or carbarator.....direct injection is also a term used to describe one method of the firing of injectors. For example, you have direct and you have sequential injection. Direct injection means all injectors open and release fuel into the cylinder at the same time regardless where all the pistons are at the time. Sequential injection means that each injector operates independently and opens specifically when it's assigned cylinder is ready for fuel.
To throw a wrench into this, some cars (like the 3rd gen maxima) use both direct and sequential injection methods. On startup, all injectors open and insert fuel at the same time. After the engine begins to combust fuel....to start....the ecu changes over to a sequential injection method.
As far as I know, the 5/5.5 gens operate solely on a sequential method. However, I honestly am not sure.....could be like the 3rd gen. I leave that to someone who either knows or cares enough to research.
Naturally aspirated (n/a) is a term which is used essentially to describe how air enters the combustion chamber. It indicates the engine breaths on its own, it utilizes the pistons to draw air into the combustion chamber, so it naturally feeds itself.
The typical standard alternative to N/A would be boosted. This means the engine does not breath on its own, rather a mechanism (turbo or supercharger) pulls in outside air and "forces" it into the combustion chamber, adding the benifit of compressing greater volume of air into the cylinder than could be accomplished with a N/A setup.
Now, I've said all that but still have no clue if any of that is even what you're trying to ask.
While fuel is directly injected into the cylinder versus throttle body injectio or carbarator.....direct injection is also a term used to describe one method of the firing of injectors. For example, you have direct and you have sequential injection. Direct injection means all injectors open and release fuel into the cylinder at the same time regardless where all the pistons are at the time. Sequential injection means that each injector operates independently and opens specifically when it's assigned cylinder is ready for fuel.
To throw a wrench into this, some cars (like the 3rd gen maxima) use both direct and sequential injection methods. On startup, all injectors open and insert fuel at the same time. After the engine begins to combust fuel....to start....the ecu changes over to a sequential injection method.
As far as I know, the 5/5.5 gens operate solely on a sequential method. However, I honestly am not sure.....could be like the 3rd gen. I leave that to someone who either knows or cares enough to research.
Naturally aspirated (n/a) is a term which is used essentially to describe how air enters the combustion chamber. It indicates the engine breaths on its own, it utilizes the pistons to draw air into the combustion chamber, so it naturally feeds itself.
The typical standard alternative to N/A would be boosted. This means the engine does not breath on its own, rather a mechanism (turbo or supercharger) pulls in outside air and "forces" it into the combustion chamber, adding the benifit of compressing greater volume of air into the cylinder than could be accomplished with a N/A setup.
Now, I've said all that but still have no clue if any of that is even what you're trying to ask.
Like I'm asking if my car is direct injected or N/A because I'm trying to figure it out. Because my friend as a VW R32 and just seeing is using the same method of engine type?
I guess that really depends on which VW R32 he has. Likely they are all direct injection motors. Some have turbos, some don't. Hell some are freaking diesels. Why does this matter?!? I'm confused.
Thread Starter
Junior Member
Joined: Mar 2013
Posts: 35
From: Aurora, Colorado
I'm not trolling I'm actually serious about this question.
Senior Member
Joined: May 2013
Posts: 1,440
From: Snakeden Branch, VA
I know 5th gen Maximas use both sequential and direct injection just like the 3rd gen. Was just looking at that in the FSM.
Besides that, the question you're asking is incomplete. We know nothing about your car. If it's a stock 02 Maxima, then it's a N/A car with direct injection, don't know what more to say here.
Besides that, the question you're asking is incomplete. We know nothing about your car. If it's a stock 02 Maxima, then it's a N/A car with direct injection, don't know what more to say here.
Thread Starter
Junior Member
Joined: Mar 2013
Posts: 35
From: Aurora, Colorado
I know 5th gen Maximas use both sequential and direct injection just like the 3rd gen. Was just looking at that in the FSM.
Besides that, the question you're asking is incomplete. We know nothing about your car. If it's a stock 02 Maxima, then it's a N/A car with direct injection, don't know what more to say here.
Besides that, the question you're asking is incomplete. We know nothing about your car. If it's a stock 02 Maxima, then it's a N/A car with direct injection, don't know what more to say here.
Actually, I answered that in my first post. Then went on to define the terms you are using and provided information about how even direct injection could be referring to two different concepts. The problem was that you are asking an illogical question. You asked an either/or question about concepts that are NOT, either/or. So, your defensiveness when everyone posting has attempted to get you to clarify what you are asking (and still trying to respond to what you MIGHT be asking) is highly unwarranted.
No problem if you don't understand the concepts, that's what the forum is for! I suggest when people ask for clarity so that they can help you, that you not bite the hand that feeds you. Others who have struggled with this concept have become familiar with a little function of the forums called the "ignore" button.
No problem if you don't understand the concepts, that's what the forum is for! I suggest when people ask for clarity so that they can help you, that you not bite the hand that feeds you. Others who have struggled with this concept have become familiar with a little function of the forums called the "ignore" button.
Member
Joined: May 2011
Posts: 196
From: Franklin, Tennessee
The nissan maxima is NOT direct injected direct injection is where the injector fire directly into the cylinder, we do NOT have this set up, Direct injection requires phezio electric injectors which we don not have nor do we produce enough fuel pressure. The nissan maxima is port injected which means the injectors fire into the lower intake manifold per runner combine with the air and when the intake valve open it is sucked into the cylinder combusting it. Sequential injection is the firing pattern not a type it means the injectors are timed and fire right before the intake valve opens. So to clarify The nissan maxima is not direct injected it is port injected and the firing is sequential. And the nissan maxima is naturally aspirated.
Member
Joined: Apr 2013
Posts: 153
From: omaha,ne
The nissan maxima is NOT direct injected direct injection is where the injector fire directly into the cylinder, we do NOT have this set up, Direct injection requires phezio electric injectors which we don not have nor do we produce enough fuel pressure. The nissan maxima is port injected which means the injectors fire into the lower intake manifold per runner combine with the air and when the intake valve open it is sucked into the cylinder combusting it. Sequential injection is the firing pattern not a type it means the injectors are timed and fire right before the intake valve opens. So to clarify The nissan maxima is not direct injected it is port injected and the firing is sequential. And the nissan maxima is naturally aspirated.
Correct no maxima has ever been direct injected period.
The injector is in the intake manifold not in the actual combustion chamber like direct injection.
Most automotive company have just recently started to utilize direct injection into there engines in the past few year like ford and chevy some import have used it for about 10 years but wasnt very common.
The main difference between the two is that direct injection has the fuel injector inside the combustion chamber with the spark plug and also use an average of 2,200 psi fuel pressure compared to most 55 psi in normal port fuel injection cars like the maxima.
Here are links for more info if you want to read up on it.
http://en.wikipedia.org/wiki/Gasoline_direct_injectionhttp://www.hotrod.com/techarticles/e...e/viewall.html
Also here is a pic of Direct Injection where you can see the fuel injector mounted in the combustion chamber.
Last edited by a33nismo; Jun 21, 2013 at 07:57 AM.
Senior Member
Joined: Sep 2008
Posts: 836
From: Connecticut
The above two posts were great for me to learn.
OP, I think you asked a question that you really don't understand. Just because you talked about it with your friends doesn't mean you know what you are saying. The best part about these forums is the members ENJOY educating people. That is why they are here. Instead of a defensive approach, you will get more with an open mind....sort of like life in general.
OP, I think you asked a question that you really don't understand. Just because you talked about it with your friends doesn't mean you know what you are saying. The best part about these forums is the members ENJOY educating people. That is why they are here. Instead of a defensive approach, you will get more with an open mind....sort of like life in general.
For clarity's sake, you asked half of two entirely different questions in an either/or format in the same question while leaving out the "either" or the "or" option for each. At least the wording you used reads that way. This might help you understand how to ask similar questions in the future.
Question 1: Fuel injection type
Question 2: Engine Aspiration type
Question 1: You should be asking if the fuel is injected into the cylinder or the port.
Question 2. You should be asking if your car is boosted or N/A.
Or just break it into two simple questions.
1: Is my car direct injected?
answer: If you are asking if the fuel is directly injection into the cylinder - No. Great descriptions above my post from zsolt117 and A33Nismo.
2. Is my car N/A?
answer: All stock Maxims are N/A.
Hope that helped!
Question 1: Fuel injection type
Question 2: Engine Aspiration type
Question 1: You should be asking if the fuel is injected into the cylinder or the port.
Question 2. You should be asking if your car is boosted or N/A.
Or just break it into two simple questions.
1: Is my car direct injected?
answer: If you are asking if the fuel is directly injection into the cylinder - No. Great descriptions above my post from zsolt117 and A33Nismo.
2. Is my car N/A?
answer: All stock Maxims are N/A.
Hope that helped!
Last edited by matts95max; Jun 21, 2013 at 08:14 AM.
Member
Joined: Apr 2013
Posts: 153
From: omaha,ne
Now on a side note nissan does have a direct injected version of the VQ30 engine the one used in the 5th gen maxima that called a VQ30DD.
But it was only used in japan and mostly on rear wheel drive models.
DD series engine
It is a variant of VQ series engines with direct fuel injection (NEO-Di) and eVTC (electronically controlled continuously variable valve timing)
VQ30DD
The 3.0 L (2,987 cc) engine has Bore and stroke of 93 mm and 73.3 mm, with a compression ratio of 11.0:1. It produces 230 PS (170 kW; 230 hp) to 260 PS (190 kW; 260 hp) @6400 rpm and 217 to 239 lb·ft (294 to 324 N·m) @3600 rpm.
It is fitted to the following vehicles:
1997–1999 Nissan Leopard Y33 230 PS (170 kW; 230 hp) and 217 lb·ft (294 N·m)
1999–2004 Nissan Cedric Y34
1999–2004 Nissan Gloria Y34 240 PS (180 kW; 240 hp) and 228 lb·ft (309 N·m)
2001–2004 Nissan Skyline V35
2001–2004 Nissan Stagea M35 260 PS (190 kW; 260 hp) and 239 lb·ft (324 N·m)
But it was only used in japan and mostly on rear wheel drive models.
DD series engine
It is a variant of VQ series engines with direct fuel injection (NEO-Di) and eVTC (electronically controlled continuously variable valve timing)
VQ30DD
The 3.0 L (2,987 cc) engine has Bore and stroke of 93 mm and 73.3 mm, with a compression ratio of 11.0:1. It produces 230 PS (170 kW; 230 hp) to 260 PS (190 kW; 260 hp) @6400 rpm and 217 to 239 lb·ft (294 to 324 N·m) @3600 rpm.
It is fitted to the following vehicles:
1997–1999 Nissan Leopard Y33 230 PS (170 kW; 230 hp) and 217 lb·ft (294 N·m)
1999–2004 Nissan Cedric Y34
1999–2004 Nissan Gloria Y34 240 PS (180 kW; 240 hp) and 228 lb·ft (309 N·m)
2001–2004 Nissan Skyline V35
2001–2004 Nissan Stagea M35 260 PS (190 kW; 260 hp) and 239 lb·ft (324 N·m)
