SR20DEN

iTrader: (7)

First off, your cams are less agressive with would be easier on them. Second, I have heard this, the info comes from SGP. I think thats more for extended high RPM runs which most of us don't do.

krismax

iTrader: (15)

The main IACV block is the main thing but there isnt much to tell .Its more of moving around the 96 stock sensors and hoses and as you see in the pics Ive figured outa perfect place for them. Also the TB pluges needto be made 3 inches longer. I cut of nipples on the 2000 upper that were in the way and things like that. I also took the 2000 fuel dampner off and tig welded the 96 fuel nipple on it. The block and positioning needs to be exactly like that any different and the block will not fit. And also the 96 brake vacumm line barb was taken off the 96 manifold and put in the 2000 and used for somehthing else.

krismax

iTrader: (15)

Well to bad for me because JWT cams are going in at end of summer, and at that point peak power could be in the high 7's rpm.

SR20DEN

iTrader: (7)

I would do it anyway because even the aftermarket cams for the VQ35 are all supposed to work with the stock valvetrain.

But that's just me. Until I see pictures and irrefutable proof I am not convinced.

krismax

iTrader: (15)

I wish we knew because you wont get lighter than those and they only cost a few dollers apiece.

SR20DEN

iTrader: (7)

Have you also looked at the VK45DE valve information I posted?

Tatanko

iTrader: (34)

So for the valvetrain, what are we looking at here in the way of upgrades? VQ35 retainers...and what else? I think you (SR20DEN) mentioned VK45 titanium valves...but what else?

SR20DEN

iTrader: (7)

That is pretty much it. If you use the stock valves then use the VQ35 retainers. If you want to use VK45 titanium valves you'll probably use the matching VK45 retainers. But the VK45 springs are much softer so don't use them.

Tatanko

iTrader: (34)

So then just VK45 retainers, VK45 valves, and VQ30 springs? All this will stand up to the abuse of those extremely high RPM's?

krismax

iTrader: (15)

Yes it looks great its just ,I would need someone to confirm they wont be a problem and then Ill get them. I also want titanium springs and retainers or aluminum if it works.
I want to do this right and only once.

Tatanko

iTrader: (34)

Reminds me of the scene in F&F when they're "praying" before dinner and they mention being thankful for titanium valve springs

Sorry, off topic

AKM2k5

haha...

SR20DEN

iTrader: (7)

And again, the setup will need all new shims to take up the slack of the slightly shorter valve. I am waiting on a .org member to send me a bunch of VQ30 parts to study. If i can get a good enough deal on VK45 valves I will inspect this. I can't use the VK intake valve in my VQ35 because the face is 1mm smaller but I can use the exhaust valve if I shave the stem to make it shorter. The reason behind that is the VK45 valves are longer than VQ35 valves but shorter then VQ30 valves.
The VK56 uses the same size valves as the VK45 even though it has a much larger bore of 98mm. If the VK56 used ti valves it would be better because I have better access to Nissan parts as opposed to Infiniti parts.

Ramius83

I am very interested in this.

I currently have two complete 4th Gen engines sitting in my garage that I could use to test fit the DEK manifold on until it is perfectly set on......

Hmmmm, darn you Krismax for making this work lol. Now I will be spending more money......tisk tisk tisk...... ......Thanks BTW......

krismax

iTrader: (15)

Sounds great keep me posted

Ladzio

iTrader: (8)

Noone has opinions.... ???

IceY2K1

iTrader: (3)

IT HAS ALREADY BEEN DONE BY maxS.

Ladzio

iTrader: (8)

THANK YOU, ICEY2K1. I'LL LOOK FOR HIS PAGE

IceY2K1

iTrader: (3)

Actually, I take that back, it has NOT been done.

I was mistaken. maxS and vsamoylov were talking about the same car...didn't know that until I looked:
http://www.cardomain.com/memberpage/444152/4

So, it was a -K engine withOUT the manifold. My bad.

BSwithTF

iTrader: (8)

If I can duplicate that "special" adapter piece, I'll do the whole thing at once. If not, for times sake, I'll put the MEVI on until I get it made and then swap the upper and lower out.

Mad-MAX_SE

iTrader: (2)

wow, i think my brain is in overload mode...i guess i'll hold off on the mevi untill everything is figured out. guess i'll get headers first

skeelo34

iTrader: (4)

postwhore12345

Thaniel

Kris,

GLad to hear you got your project working! I think I'll leave the restrictive plate out of my 2000 intake. Good work.



What is a "TRUE" variable intake?

If I were call a maxima intake "true" I'd say the 2002 not the 2000.

The 2000 maxima intake seems to function similar to the mevi. It just has a different profile. The 2000 runners arch higher and the air box is under the runners where the mevi the runners a flatter and the air box is on top.

What am I missing?

Kevlo911

iTrader: (36)

True variable intaKe is in the 5th gen maxima, SHO's, ect...

http://rds.yahoo.com/S=2766679/K=var...e_Manifold.htm

I read about the Main differences compared to the VI but I lost the thread.

IceY2K1

iTrader: (3)

Two different length runners for each cylinder from the main plenum chamber.

The 2000-2001 DEK manifold has a flap that covers the shortest runner that once it receives vacuum and ECU signal above 5000rpm opens and allows the shorter runners to flow air.

SR20DEN

iTrader: (7)

I would say that the composite manifold found on the 2k0 and 2k1s is the only "true" VI with the MEVI next in line.

The 2k2 intake manifold is ghetto and does not change between different length runners.

krismax

iTrader: (15)

I love my car so much more now. When my VI switches over at 5250 rpm ,the cars acceleration rate seems to double.
I wonder what the best RPM is?

IceY2K1

iTrader: (3)

Stock DEK is at 5000rpm, but with your ECU/mods, maybe even sooner.

[edit]
Actually looking at the ONE stock dyno I have, 4600-4700rpm looks better.
[/edit]

Dyno will tell.

Mad-MAX_SE

iTrader: (2)

i truly hope you're not calling me a post *****...i only have like 500 posts and you have twice as many as i do, yet i've been registered on here for a year longer than you. I was just stating that there was a ton of info in here, and i was planning on getting a MEVI, but now i'm going to hold off and put funds towards something else in the mean time.

krismax

iTrader: (15)

Another thing I did was move the PCV valve on of the valve cover ,in the air seperater pics deezo posted you can see the PCV valve right out in the open.
I was thinking of raising it at 5750rpm the reason i say that is because the long runner before switchover is pulling hard around 5000rpm.
Also alot of the answers for doing this are in the intake manifold swap thread.

IceY2K1

iTrader: (3)

Look at the dynos on page three.

You'll see where hp is begining to level off, ie 4700rpm, because torque is falling.

Definitely, don't go HIGHER.

DAVE Sz

iTrader: (2)

Longer runners for low end torque.
Thaniel, the difference is that the DE-K has 2 separate runners for each cylinder while the MEVI has single runners with additional space that opens to change the sound frequencies or whatever to get more power up top.

Thaniel

Thing is the 2000 maxima engine does NOT have 2 seperate runners. It has a valve that opens to a chamber similar to the MEVI. I've heard everybody talk about the "true" variable intake but I have fully dissasembled my DE-K upper intake and even cut part of it off and there isn't a seperate runner. The valves open to a closed box which allows one cylinder to pull air from all the runners like the MEVI. NO SEPERATE RUNNERS.

Anyone have any nissan literature from the introduction of the 2000 maxima mentioning the variable intake? I've read stuff for the 2002 and pathfinder and they DO have 2 seperate runners. It is just not there on the 2000 (much to my surprise and dissapointment).

spirilis

iTrader: (2)

That's interesting... it also explains the VIAS diagram which has often confused me.

(link here: http://larrio.maximaclubca.com/VIAS_1.PDF major props to Larrio for hosting this)

SR20DEN

iTrader: (7)

The 2k2 manifold has ONE runner per cylinder. NOT two.

MaxSpeedSE

iTrader: (3)

It was asked a couple pages back, and i dont recall anyone answering... with the manifold clearing the hood and firewall..Could a 2000-2001 just be swaped into the 4th gen?

-Chris

IceY2K1

iTrader: (3)

I've got one at home that I've check inside/out and I disagree.

It's got two runners. It starts from the main plenum as one runner that splits into two runners, one short into the box and one long over the top of the box, and then they join before the lower manifold. The path the air takes is determined by the valve being opened on the shorter path, which causes the air to bypass the longer runner which is still open.

Explain how that's similar to the MEVI, I don't know how the MEVI really works.

Also, you have any pictures of that disected DEK manifold?

Thaniel

Ice,

Pull the valve system out and look into it. There is a path to the valve but when the vavle is open the path goes to a BOX that is connected to all of the runners by going back through the valve to a different cylinder. There is no second path to the Throttle body. The only way air can get to the valve is through the long tube then down to where it almost meets the lower intake. It can either go into the lower intake there or do a almost complete 180 and go up into the valve and then into a DIFFERENT cylinder. I have cut my intake through the runners. draw a line connecting the coils if you want a visual. I can look up the runners both directions. There isn't a second path.

I can try to get some pics to you if you don't believe it but if you remove the valve from the intake and look in there you will see there isn't a second path.

the diagram previously posted http://larrio.maximaclubca.com/VIAS_1.PDF agrees with what I am telling you. notice that it says "effective port length" or the 2 ports commbined act like a shortened port (or runner). There isn't actually a second port or runner.

By the way I am not saying that the 2000 intake is not better than the pre 2000. Just that it doesn't have 2 runners and that it is very similar to the MEVI.

Thaniel

Maybe the 2004 has 2 runners? I thought I read in nissans literature that one of them does. I'll have to recheck what year brochure I have and exactly how it is worded. Maybe they just miss lead me with the wording.

What view is the second picture. I am guessing it is doing a similar thing then but farther up the runners. Allowing one runner to be connected to all the runners?

A few mazda cars use a similar concept. They call it VDI (variable dynamic intake).

IceY2K1

iTrader: (3)

I see what you're saying, I think, but still not agreeing. You could be right, just not what I saw, but mines not cut open so it's hard to tell.

Anyways, I'll look tonight and see if I can remove the power valve to get a better look.

I don't care which is better/worse honestly. The -K just appeared to have a runner for each cylinder that splits from the plenum, takes either A or B path, and then joins before entering the lower.

Good info though~!