OK well now that i have tried about everything on my girls 97 max with a 3.5 and 3.0 heads, cams and a bunch of other goodies. Here is my take on IMs

Stock sucked all around

Extrude honed showed decent gains all around but still lagged up top (especially with cams you could hear it struggling for air)

MEVI felt better on high rpm but lagged under 4.5-5k compared too the extrude honed (it didnt do anything for my 1/4 mile time compared to extrude honed. w/o ecu upgrade)

00VI I just put on yesterday and so far it feels like the extrude honed at low rpm and even felt better than the MEVI on top end. It like the best of both worlds even with the runners open it feels good (no rpm switch yet) IMO 00VI is the way too go, it seem like it flows better from 5.5k+ if only i had a ecu. VI is the worst too install but has the best feeling gains overall, even my girl said it felt alot better.

 

Just like i've always said 00 vi is
It was the perfect design by nissan and i shall bye another to put on my car i cant live without it .
Im staying with the 3.0 and this is one of my reasons

 

Thanks for taking the time, money and thought into this, it is a good finding.

 

tilley have u ever considered a Extrude honed MEVI?

 

Where did you get the manifold extrude honed? www.extrudehone.com? Also, is there a thread with a before / after dyno? I'd appreciate it. Thanks.

 

Keven97se posted a before and after dyno of his extrude honed manifold like 3 years ago if you can search. Dave reposted the pics not too long ago.

As far as extrude honing the MEVI I think they would have a hard time doing it because of the design of it.

 

Is there a write up of what parts you need and how to put on the OOVI? I've looked but haven't found anything.

 

They can do it, I got a quote a while back, $$$, decided it wasn't worth it.

 

TILLEYS99 is your car a 1999 Cali Spec?

 

the car is a 97 that the IM on

 

My car is cali spec (well it was) but this was tested on my girls 97.

There is no list of parts cause im still trying to figure out easier ways too do it too save time.

sorry no dyno #s but my g-timer says i lost about .2-.3 in low end going from the EH IM too the MEVI

 

Welcome to the '00 VI family.

How are you doing your IACV?

 

I made a plate (IAC mounts too it) with a hole threaded for a 3/8" fitting then had a t-fitting on the bigger vac port on the IM

 

Are you still considering the 3.5 upper end? Extrude hone the 3.5 manifold?

 

Probably by spring

 

oh are you going to be able to install this on your 1999 eventually i know the cali stuff is a pia

 

Cali spec can be bypassed with a wiring harness FSM and a case of beer

 

6 or 12?

Hey Tilley I was just curious... coming from a guy with a Turbo on his car... Hp apart, which is more interesting, NA or FI?

 

is there a list of needed parts or any install pictures? I want to do this if it's around the same price as MEVI.

 

considering my boosted car is never running. But i do like the NA

 

This really confuses me, since most people I have talked to say the 00VI is junk and the MEVI is the way to go.

 

It makes more power but is made out of plastic, so there is an abnormally high failure rate AFAIK. Check the 00-01s dyno -- the power keeps going all the way to redline, without the loss in the lowend that the MEVI has. It's even better than our godly VE's VI

 

What fails with it? One good thing is the plastic is lighter eh?

Our VE VI is good though, the design is just a little old, I wonder what an extrude hone would do to one?

 

the power valve that actuates over at high rpms. Another good thing about plastic is that it doesn't soak up as much heat.

 

Does the power valve fail alot? I know all the VE power valves should be replaced every 60k or so. You are right about the heat, I also like the weight factor.

 

not the valve itself but the homo tin foil looking collar that the power valve sits in that is stripped over time.

My write up on the problem
http://maximaracing.org/viewtopic.php?t=76

 

Wow, Nice findings, hahaha, as I always say, the org wouldnt be here w/o experimenters like you

 

I'm wondering if thats the reason why I'm no longer feeling the top-end power

 

Nice find Tilley....hmmm...*thinking*

 

Thanks for the feedback and trying the different manifolds.

From what I know, there has been only one direct comparison between the MEVI and 00VI that is reliable IMO. BSwithTF kept enough varibales constant, like weight reduction. He used the same track. Same type weather. No other mod changes besides the VI and DR's. By looking at his slip and taking the 60' into account he seemed to gain about .15 with the 00VI over the MEVI. Now, being that tracks are not controlled labratory environments there is surely some error factor. With only a .15 difference, the gains could have been a little better than that or a little worse. But without doing comparisons on the same tires, on the same day, at the same track the results will only be estimates. Now, we can't expect guys to be able to those type of exact comparisons because it is just not feesable. So BSwithTF has given us about the best comparison we can expect....and IMO it is nothing amazing. Better? Yes.

 

The plastic also has a tendency to warp hence much of the reason for the power valve failures.

 

The DEK manifold peaks at 6200-6300rpms and the MEVI peaks at 6100-6200rpms with both manifolds keeping 95% of the their peak power to a 7000rpm fuel cut therefore you'd be hard pressed to feel the difference. Since no one has done a Dynojet dyno with their DEK-swap, we really don't know how much of a gain there is in the midrange. Like Mike posted, there is some type of gain going with the DEK compared to the MEVI because Travis (BSwithTF) went from 14.7@93 to 14.5@94mph with manifold swap.

 

actually tilleys comp is more meaningful he used the stock IACV and TB size and EGR system BSWITHTF didnt.

 

If he had track times or a dyno as well I would agree. But no matter who it is, and Tilley is about as good as we get on maxima.org, "feeling" gains is not the same as proving them

 

wow 6200-6300 rpm for the dek is low ive seen 6600 rpm with a few bolt ons on a 00 max.
Also does a mevi's low end feel better than a US manifold? The00 vi does .

 

You guys are missing a huge point thou . forget about 1/4 times think about quality of powerband on the street comparing the two.

 

That is very true, but that is really hard to quantify.

The only reason I ever chim in on these MEVI vs 00VI threads is so members can get some real feedback. What tends to happen here is that people read that someone says "The MEVI sucks and the 00VI gives huge gains". A person goes out and spend the time and money to switch to a 00VI from an MEVI. Comes back and gets a .1 better 1/4 mile and is like WTF?

The low end power loss of the MEVI has been proven time and time again. But a lack of that same loss has not been proven with the 00VI. Looking at a dyno of a 2k1max vs a 4th gen MEVI'd max is not gonna cut it. Have we been shown that there were fairly significant internal changes to the VQ30DE-K fromt the VQ30DE, include cams. Do we have a 00VI dyno on a 4th gen compared to a MEVI dyno on that same 4th gen on the same dyno? The MEVI and 00VI use the same technology....not true dual runners.


Another thing that gets me is that Tilley posted here that his 00VI with the butterfly valves constantly open feels better in the low end than his MEVI with the butterfly vavles closed. That makes no sense. If there was a low end gain for the 00VI over the MEVI then having the butterfly valves on the 00VI constantly open would negate that, correct? Just a reason why I don't buy into "feeling" small amounts of power....not even myself.

 

Sorry, when I stated that the DEK manifold pulls to redline, I was comparing it to the stock 4th gen US manifiold, not the MEVI.

 

Is there any pictures or anything of a 00VI setup? If It gives the same high rpm boost AND has no power loss in low rpm it's better. (in my book)

What exactly is required to swap in a 00VI?

 

Even if it didn't perform better at high RPM than the MEVI, the lack of low end loss and it's resistance to heat-soak make it better already. Now if the effort required to install it doesnt seem worth it to you, that's another story. You can't use ease of installation (or lack thereof) as an argument to knock the 00VI.