Another 00VI installed on a 4th gen.
12-15-2004, 06:49 PM
#42
Originally Posted by IceY2K1
You need to turn down your fuel pressure to compensate for the 240cc-->290cc injector increase. Krismax didn't have a problem, but he was using a 4th gen IAC and StephenMax doesn't have a problem because he opened up the throttle plate and is running 370cc w/JWT ECU.
Just something you might consider.
Just something you might consider.
12-16-2004, 05:06 AM
#43
Originally Posted by JMooney5115
Stephen Max: About how long would this take to swap?
Mooney
Mooney
12-16-2004, 07:10 AM
#44
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.
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.
12-16-2004, 07:36 AM
#45
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.
Originally Posted by BSwithTF
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.
12-16-2004, 08:22 AM
#47
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.
12-16-2004, 08:30 AM
#49
Originally Posted by Nismo3112
What are the coil pack mounting bosses? Krismax didn't have to do this??
Either Krismax had to do this or he used a 5th gen rear valve cover and coil packs.
12-16-2004, 09:08 AM
#52
Originally Posted by krismax
With the brackets that attach to the rear of the IM's I took them off and trashed them they unbolt from the engine.
12-16-2004, 09:17 AM
#53
Originally Posted by Broaner
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.
12-16-2004, 11:28 AM
#56
Originally Posted by Stephen Max
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.
Either Krismax had to do this or he used a 5th gen rear valve cover and coil packs.
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.
12-16-2004, 11:31 AM
#57
Originally Posted by Broaner
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.
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.
12-16-2004, 11:38 AM
#58
Originally Posted by krismax
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.
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.
12-21-2004, 06:31 PM
#63
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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.
12-22-2004, 05:25 AM
#64
Originally Posted by 96sleeper
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.
12-22-2004, 08:10 AM
#65
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."
"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."
Originally Posted by 96sleeper
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.
12-22-2004, 08:45 AM
#67
Originally Posted by Stephen Max
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.
12-24-2004, 09:59 AM
#72
Originally Posted by kevlo911
4th gen TB? Any close up pics of it? Does hte tb spring/cable area move all the way to WOT?
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