With the brackets that attach to the rear of the IM's I took them off and trashed them they unbolt from the engine.

 

I installed a V-AFCII thinking I would have this problem and went to get it tuned. The guy at the dyno said the A/F was as good as he could get it. He tried to change some stuff in a couple area's but didn't have any luck. I've read JWT ECU's don't react well to S-AFC's/V-AFC's. I didn't get a graph, but I am going to dyno again on the 18th and I will request an A/F graph this time for sure so I can review it and put it on here for you guys to see as well. I'm going to try the throttle plate idle control method and see if that helps.

 

I didn't keep very good track of the time I spent on it, but I spent several evenings modifying the lower IM, making the adapter plate and match porting the IM, and about four hours removing the mevi and lower IM and installing the modified lower and the 00VI. Installing the 00VI took a lot longer than I expected because of having to grind down the coil pack front mounting bosses on the rear valve cover.

 

I took a look at Z32 maf volts that I datalogged during my last dyno session a couple of weeks ago compared to maf volts with the 00VI installed. It shows the 00VI produces as much as a 6% increase in airflow compared to the MEVI.

One caveat though, is that the data for the 00VI was collected on a considerably colder day than the dyno session (about 30 degrees).

At any rate, I am going to dyno again tomorrow, then we can compare results corrected to standard temp and air pressure.

 

That's not measured during cold starts, which is where you are having an issue. You need to turn down the base fuel pressure for cold starts when the ECU dumps in tons of fuel for cold start enrichment.

 

Ahh, I see. Damn, gotta buy more parts.

 

What are the coil pack mounting bosses? Krismax didn't have to do this??

 

BSwithTF you got PM.

 

Those are what the coil packs bolt onto. There was interference with the underside of the 00VI and those bosses. I'll explain all this and show pics if I can get around to doing the writeup.

Either Krismax had to do this or he used a 5th gen rear valve cover and coil packs.

 

A write-up would be great... Are the coil packs still able to be bolted onto the valve cover?

 

I'm using the back bolts but not the front.

 

Does the IM have enough support if this is done? I'd like to get rid of those things because it makes removing and installing the IM much more difficult. Also, they are worth about a pound. I'm still using the USIM but I'm wondering about this.

 

The 00vi is lighter and uses 6 bolts at the lower/upper IM interface the way I have it mounted. It feels quite rigid and I feel the support is very adequate for street use. Probably wouldn't want to do any serious off-roading, though.

 

Would you say it'd be alright to remove one of them atleast?

 

Sure.




12345

 

Nope,i used 96 valvecover and 96 coils it all fit perfect.
Remember you didnt use the 00 lower IM that prob changed it for you.
If i person uses the 00 lower and upper you will have a bolt on beauty.

 

I have the 00 back brackets if you want to buy them there really prob 3-5lbs and i didnt use a one and i bought them brand new.

Think about this when i went to the maxima meet same day i swapped it in front of deezo i grabed the dek manifold and started violently rocking the car just by the IM. Trust me if i can do that then the IM doesnt need the rear braces.

 

Thanks for the info.

 

Cool. Count me 3-5Ibs lighter.

 

Did you ever get a chance to do it?

 

I did the dyno, but haven't started on the writeup. Probably after Xmas.

 

i have 00 vale covers if anyone needs them

 

Looking at the dynos, it doesn't make power higher up than the MEVI, which is what everyone originally thought. The curve is just higher everywhere. That looks like the dyno gains of an intake manifold that has been extrude honed. I wonder if the gains from the 00VI come partially from the fact that it is smoother plastic compared to cast aluminum? Just a random observation and thought.

 

I think so, too. But the curvature of the runners is greater than with the USIM as well, resulting in a lower loss air path to the engine. Anything that reduces abrupt changes in cross-sectional area and flow direction will result in more air flow in a duct for a given pressure drop.

 

I'd say that is part of it...per SAE tech doc:
"REDUCTION OF INTAKE RESISTANCE – Intake
resistance has been reduced in the VQ30DE by adopting
a plastic intake manifold so as to reduce surface
roughness."

Also, to StephenMax point:
"REDUCTION OF AIR LEAK OF VARIABLE INTAKE
SYSTEM – In the VQ30DE, the air leak in the variable
intake system has been reduced by adopting a labyrinth
structure for the rotary valve, which is used as the inertia
adjustment valve. Since the inertia effect can be utilized
more effectively, volumetric efficiency is improved."

 

Also, the heads/cams are probably the bigger restriction now.

 

SM... you're PM box is full!

 

Try again, I deleted some stuff.

 

 

Pics of my progress:

 

4th gen TB? Any close up pics of it? Does hte tb spring/cable area move all the way to WOT?

 

Yep its a 4th gen TB, I had to make the adapter out of 2 plates so there would be enough clearance for the cable mechinism to rotate freely, and also for the TPS to sit nicely.

 

Ya, I have to do some modification to my block for those 2 reasons. I should have went with hte Pathy TB and it would have been in yday.