Adding more installation complexity and added time just for a .1 and <1 mph difference are not easily digested by most, especially if the results are very minimal.

 

Results could be better than that...or possibly worse. BSwithTF is an auto so 5spd results may differ.

 

For the longest time we just assumed that the 00VI use two seperate runners like the 3.5 manifold...that is where the idea came from that the low end power loss was caused by the MEVI not being a "true" variable intake. We now know that the 00VI uses the exact same technology that the MEVI uses.

Again, has there been a 00VI and MEVI dyno done on the same 4th gen at the same dyno? Anybody know?

 

I think everyone thought that until it was exposed recently.

I thought BSwithTF is 5spd now?

 

The mid-range loss has nothing to do with the fact that it's not a true dual-runner VI. Someone explained what it is a while back and with my MEVI off and taken apart it makes sense. The butterfly valves on the MEVI dont sit flush with the upper portion of the runner. Because of this, a pocket of turbulant air forms between the runner and the butterfly valves. It gets more and more turbulant as RPM's rise until the valves are opened. That would explain why the MEVI shows significant losses in the mid-range and NOT in the low-end.This could've been eliminated altogether by having the butterfly valves flush with the runners (simple enough right??). Nissan probably realized the flawed design and changed it in the 00VI. Like i've said before, just because the MEVI and 00VI share similar design doesn't mean they're created equal.

On another note, the 00VI's runners are longer than the USIM.

 

True, the runner length I forgot about. As far as the "pocket of air" thing, I am not sure of that myself. You have a thread where it is explained better?

 

I said a "pocket of turbulant air." If you took the MEVI off and looked at it from the bottom you'd see what I mean. Not rocket science. And no sorry, i don't have a link.

Edited my post BTW.

 

I am in the middle of taking mine off now to sell it so I will check it out

 

The only thing I changed was the VI (and took off EGR). I ran the DR's with the MEVI and VI.

MEVI best: 14.84 @ 93.55
'00 VI best: 14.56 @ 94.10

 

But the 60' foots were different correct?

 

well i tried all 4 options and IMO going from stock too honed was like going from mevi too oovi. Similar gains between the 2.

 

BTW for everyones comparisons

13.87 with the extrude honed IM
and a
13.89 with MEVI set a 5200rpm

 

What does the rest of the slip look like and were there any other changes made like weight reduction, wheels, etc. Same track? Same condititons? These are all things that must be taken into account. The reason I say this is because others may not realize the effect all these other possible variables can have. If we make sure to keep those variables constant, then we can more accurately guage the gains.

Even with the lack factual evidence indicating that the 00VI is superior to the MEVI, I'm inclined to believe that it is. How much so is debatable and requires more data than that of 3 individuals, only one of whom has done a comparison between the two that actually has numbers involved in any way (BSwithTF). The rest are just "feelings" and though they come from reliable and respected members, they are still nothing more than feelings until the data backs up the feelings.

 

60' was .05 slower on the mevi but the 1/8 was a lil slower but i picked up more mph from 1/8 on (1-2mph). Considering i didnt hookup the VI control (its wired wide open) im very impressed with how it runs all around, I had the MEVI hooked up the same way and it felt sluggish especially in mid range. I would give #s but i cant since all the tracks are closed.

 

MEVI best: 14.84 @ 93.55 w/ 2.28 60ft
'00 VI best: 14.56 @ 94.10 w/ 2.20 60ft

With the MEVI I was lucky to get in the 2.2X's for my 60ft. It was usually low-mid 2.3's. Now I rarely see any 2.3's. The power down low is definitely there. I just about have enough saved up to go get a dyno at the shop I usually go so hopefully it'll prove what we've all been feeling.

 

Thanks so much to all you pioneers! I hope to put on a 2KVI someday soon.

Tyrexx, I'm with you. Time to figure out what exactly is involved in installing and running the 2KVI. I'm going to start spending most of my Org time reading VI threads.

 

But wasn't this without the JWT ECU? If so, my car was no quicker with the MEVI and no JWT ECU. I ran consistent low 14.7s@95mph with the MEVI and the stock manifold. Then I added the JWT ECU and instantly began clicking off 14.4s@98mph. I actually have less mods now than I did when I ran my first 14.4. Now I'm in the 14.3s@99mph.

 

Hey BS, how do u like the VI? Which TB do you have?

 

It's great. Probably my favorite mod.

I'm running the '00 TB and '00 IACV. I do have some idle issues every now and then with this setup though. There's no idle adjustment screw so at some stop signs the rpms will drop to about 350-400 for a second. It's most noticeable at night cause everything gets a little dimmer but then it catches, comes back up to about 800 rpm's. I haven't had too much time to tinker with it so it may be something I can remedy.

 

BSwithTF: What all did you need for the swap?

00VI / 00TB / 00IACV......

 

BTW 00IACV is part of the 00TB

 

Tilley, do you have any idle problems with the 2KVI and Q45 TB?

 

00TB is on this car the Q tb is going on my boosted car

 

Oops, that makes more sense. Ok, so on the car with the 2KVI and TB, do you have any idle probs?

 

Not on the one with the 00vi TB I dont have the one running with th q tb yet

 

Here's a list of parts I used off the top of my head. They aren't all needed, as you can get around some stuff, but this is what I had so I used it.

'00 Upper Manifold
'00 Lower Manifold w/ injectors and fuel rail
'00 Injector plugs
'00 IACV
'00 IACV plug
'00 Rear valve cover (made the PCV easier to put in)

I think that's it. I bought an entire engine so I had a surplus of parts to swap. On the fuel rail you have to take off the regulator where the fuel enters the rail and put a regular inlet in it's place. On the plug-in for the IACV, I just cut the '96 plug off and wired the '00 in it's place. I think the center two wires matched in color but the other ones were different. My idle will adjust itself and my rpms increase when I turn the wheel sitting still so I think most of them are right. I took the A/C off a long time ago so I don't know if that works or not. That's about it.

I was told the vacuum switch and vacuum canister are already contained in the manifold but I supplied vacuum, hooked up the plug on the manifold and could hear it clicking, but the valve never opened or closed. I am using the vacuum system from my MEVI to run the '00 VI.

 

mmmBeer............

 

Give me about 2 weeks and the VI will be on. I will not be able to get a before dyno because I don't have the money, I will have an after dyno only. But I am sure there is a dyno of a 4th gen auto with CAI and y-pipe to compare it to.

 

i have the extrude honed intake and i ran meccanoble who has the mevi. i was running 9lbs of boost and auto and he had 11lbs of boost and five speed. i took him hands down from takeoff to 140+. so in my opinion the mevi is not that much better, i personally think it slows you down in the 1/4 maybe having better benefits up top.

 

In a SC set up there would be so many variables......how in the world can you say that the race betweeen you two proves one manifold over the other? Come on now

 

thats why it was sc against sc the variables are the same at least for that. the whole point of the race was to see if the mevi made a difference, it didn't. now he was running more boost plus the mevi so it should of made a big difference but it didnt. i personally wouldnt buy the mevi cause it hasn't proven anything to me and if it did it would be in my car. mike i will always respect your opinion cause your no idiot but i deal in the real on the road stats verse what somebody says or paper and mecca didnt prove to me a mevi is worth my investment. i know a couple of guys with the mevi and they all have down low problems because i guess the mevi is for top end. maybe the mevi would of had a better chance if i didnt leave him off the line so hard but we'll never know now cause mecca took it out.

 

wow man just use the 00 vacumm stuff you dont need to use a seperate source the 00 vi is all self contained. if it didnt work you didnt hook it up right

 

If I go SC'd, I will most likely sell the MEVI and just go with the extrude-honed manifold. It makes me nervous with the A/F going lean when the butterflys open. Also with forced induction, the boost is actually able to overcome the volumetric ineffiency of the stock intake manifold. I think the EH manifold would be a good compromise between the two.

I have to admit that a comparison between a 5 speed and auto really isn't very good because of the gearing and power difference. Right off the bat, the auto starts off with 15-20whp/10-15wtq lower power.

 

good opinion dave. i like the way mevi compliments the engine but i need more aggressive facts that will tell me the mevi is better than the other. the whole race thing with me and mecca arouse from the fact if the mevi was worth it or not. now dave you said auto is lower but i was the auto that stretched mecca about four cars and he had mevi 11lbs of boost, i only had 9lbs and wasnt juicing. i figured i'd take off the line pretty quick because of my tranny but i thought he would eventually creep by me at higher speeds, it didnt happen. now thats my true to life comparison of the mevi vs extrude

 

even with less boost you could easily be making more power than Mecca for several reasons. How you are tuned is the biggest and I remember mecca never really being tuned with his SC set up. Is this true? What about exhaust? A test pipe alone could be 15-20 hp difference when running 10lbs of boost. See what I am saying.

If you wanted to know how an MEVI would effect your car you would need to put one on your car. Not race another car with a similar set up that has an MEVI. When comparing NA maxima's it's different. NA differences would be slight...but when you boost a car things like tune and exhaust piping will make a big difference.

I just don't think your race against Mecca in anyway shows how a stock manifold performes against an MEVI.

I know I have seen a SC maxima dyno with and without an MEVI and there was a significant difference. It might have been Iansw or StephenMax, I can't remeber.

 

I don't know what effect it has on an SCd car but on Keven97SEs NA car he gained like 8hp and 10ft-lb using extrude honed manifold.

And I would tend to agree that with an SCd vs SCd race there are alot more variables which can come into play and also with auto vs 5spd. SC vs SC, like mike said exhaust setup can change power output by like 20hp or more, as can belt tightness which if a belt is overtight or undertight, that car wouldn't be producing the "normal" amount of boost that the pulley size would indicate, and perhaps the most significant variable of all, tuning. Also auto vs 5spd: yes 5spd is generally faster, but consider this (and mecca don't take this as a slam against you) but most of us don't know how well mecca can drive, or if he just had a bad launch, spun really bad, etc). Autos are much more consistent which could have contributed. Also remember that SCs put out peak boost only at redline, so when you guys were accelerating through like 4500rpm (where the EH manifold has its most significant gains on an NA car at least) he was only supposedly making like 1psi more than you, but he also had the TQ loss that is inherent with the MEVI, and also you had alot MORE torque than a normal manifold would, etc.

Sorry this post is incoherent I'm just kindof thinking up ideas as I type and not formulating them into well thought out prose because I am in a hurry and have to get going.

 

IMO the 00VI is a example of what I could see the MEVI perform like if it was EH'ed

 

How much does extrude honing a manifold cost?

For those with 2KVIs, did you do the JB Weld fix for the broken VIAS, which supposedly breaks about 40K miles into a DE-K's life?

 

see mike i said your no idiot lol.your right there were a lot more factors than the mevi since you put it that way. neal mecca could use a couple of manual classes since you mention it but al least your opinions are making sense for other people to gauge off.

 

Hope anybody using that JB weld stuff has better luck than me. I tried it to hold a bolthead and it broke right away.

P.S. EHng both upr/lwr from EH direct is like $650. Some perfshops get a slight discount. There are a couple independents around the USA that have the equipment to do it also for about half$. (sorry I no longer have their names)