Update: The VQ30DE 4th gen Maxima Thermal Intake Spacer Kit is now available for immediate shipment. The price has been set at $215 plus $10.00 with the option to purchase a Titanium Nitride Coated Six Step Drill Bit to easily enlarge the bolt holes on the stock EGR Tube.

Installation instructions have been added to the NWP Engineering website in PDF format.

Thank you for everyone's patience and support!

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Hey everybody. I am the owner of NWP Engineering and I know most of you have been eagerly awaiting an update on the development of the 4th gen Maxima Phenolic Thermal Intake Spacer Kit.

For those newcomers that don't know much about the NWP Engineering Phenolic Thermal Intake Spacers, please feel free to do some more reading in the threads below:

Main vendor thread including pictures and product information of the VQ35DE Kit:
http://forums.maxima.org/showthread.php?t=404064

5th gen VQ35 Spacer Development Thread:
http://forums.maxima.org/showthread.php?t=384774

6th gen Spacer Development Thread:
http://forums.maxima.org/showthread.php?t=387128

Now that testing of the prototype is complete for the 4th gen Maxima, we are able to provide concrete information. On Feb 9th, dawalkster came out for his 2nd and final visit. We were able to install and fully test the 4th gen Intake Spacer Kit. Full temperature and dyno testing was conducted using the same exact engine warmup procedure. For both the temp and dyno testing, averages were taken to get the most accurate results possible.

Testing was done on a 96 Nissan Maxima 5spd with only a JWT ECU Pop Charger.

Here are the before and after average temperature results on the different manifolds:

Heads Before: 195 degrees
Heads After: 195 degrees

Lower Intake Manifold Before: 185 degrees
Lower Intake Manifold After: 142 degrees (Difference of 43 degrees!)

Upper Intake Manifold Before: 157 degrees
Upper Intake Manifold After: 117 degrees (Difference of 40 degrees!)

Throttle Body Before: 146 degrees
Throttle Body After: 123 degrees (Difference of 23 degrees!)

Now, the Upper Intake Manifold (UIM) has coolant flowing through it. The NWP Engineering Kit will include a bypass fitting to make bypassing the coolant much easier. The Throttle Body also has coolant flowing through it. But since the coolant is needed in order for the Fast Idle Cam to function properly, this has not been bypassed. That is why the After Throttle Body Temperatures are much higher than normal.

We were able to do 3 before and 3 after dyno runs. Then, the averages were calculated at every 100rpm interval in order to get the most accurate results.

The results were a max gain of 8.3 HP and 9.4 TQ. The gains are not throughout the entire powerband, but you do get a solid midrange power gain and a much smoother powerband!

The dyno comparison chart can be seen here:

http://www.nwpengineering.com/images...acers-Dyno.gif

Here are a couple pictures of the 4th gen Maxima Thermal Intake Spacers:





The final price has been set at $215 plus $10.00 shipping. A Titanium Nitride Coated Six Step Drill Bit will be included for an extra $10. This is to enlarge the bolt holes on the stock EGR tube and it makes the process much easier.

Thank you everyone for all your patience and support!

Aaron Kimball
NWP Engineering, Inc.
www.NWPEngineering.com

 

Now that's what I'm talking about.

Nice job Aaron. Will be getting some spacers from you soon.

 

Same here. After I heard about them for the vq35 i was wondering when you were gonna come out with them for the vq30. I'll be second inline.

 

Very nice Aaron!! But I have a few questions off the top of my head.

Maybe I'm visualizing things wrong, but what about the EGR valve? How does that bolt up now?

Also, what about the two bolts/brackets that support the Upper Intake Manifold by the firewall?

Also, is it safe to assume 4 new bolts will be included to secure the UIM at the front?

Are longer bolts needed for the TB?

How did you address the throttle/cruise control cables with the addition of the TB spacer??

Also, for those with MEVI decorative covers, this will affect the appearance right? The cover will now 'float' where it meets the spark plug cover.

Edit: disregard front UIM bolts question........

 

Would it be possible to get a copy of the dyno files to crunch a bit in a spreadsheet? I'd like to back out those spikes & dips before considering.

 

Great product Aaron, should sell real nice at the Meet

 

More and more I regret not being able to go to the meet.

Nice work man.

 

would this work for the 2000 max?

 

Now will these work with an 00vi swap if I'm running 4th LIM and 5th UIM? Or will they not line up?

 

wish i was closer to florida

but i'll get this sooner or later. glad your finally got this done aaron! great work!

 

You Suck.. i was gonna ask the same questions... but yea what about the egr.. AND are these milled on a CNC or are they molded or punched out..

 

The spacers appear to be causing a very small loss of hp/TQ from 5700rpms to 6250 rpms, and since that's when a SC really comes alive, do you think this might be amplified with FI, thus causing a noticeable loss at the top end? Also, was it taken to redline?? Maybe it's just me, but it looks like the graph stops at 6250 rpms.....

 

Probably a safe bet they are CNC machined, as his other kits are. Check out his first link.

 

cant wait for this product!!!

 

I am also very curious as to why the dyno stopped at 6200

 

do we still need a MEVI tested??

i know i know, stop bothering you

 

How much are we looking to spend on these?

 

the other sets were 235 roughly, so expect around there



are you bringing any of these to the meet? i think you should.

id like to talk to you about them and pay you cash in hand, rather than deal with paypal

 

how much is the kit for the vq35?

 

nice job aaron! this will be my spring project.

 

I would like to know if these will fit an 00VI swap with 5th gen uim, lim, and tb?

 

The EGR tube is a TIGHT fit. It is possible it will bolt up without modifying the EGR flange, but more than likely, the instructions will specify that the top EGR tube flange bolt holes will need to be enlarged slightly. I am trying to make this kit as complete as possible. I hope to include the correct bit needed to enlarge the flange bolt holes. All you'll need is a normal hand held drill.

As for the UIM supports, those will more than likely have to be removed just like with the VE30DE and VQ35DE Spacer Kits. On the VQ30DE, they are a PAIN to get to. Once they are removed, I suggest you leave them off the engine for easier intake manifold removal in the future. This should not hurt anything at all. I just recommend not to stand on your intake manifold or pull the motor out by wrapping a chain underneath the UIM.

The fasteners on the UIM are called shoulder bolts and studs. The only reason Nissan went with a shoulder bolt is to prevent the rubber gasket from being overly compressed. Now that the rubber gasket is removed, the shoulder bolts are not needed. But, they are the perfect length with the addition of the 1/4" Spacer. The UIM is only being raised by 3mm since the thick rubber gasket is being removed. I chose to reuse the stock UIM bolts and studs since they were already the perfect length. Plus, it will help with lining the UIM up during install.

The kit will include slightly longer TB bolts. Plus, they will help clean up everything since they are brand new grade 8 silver zinc plated bolts.

The TB cables are never a problem with the VE30DE, VG30E, and the VQ30DE kits. The spacer is only a 1/4" thick and there should be plenty room for adjustment using the stock adjustment nuts.

As for the MEVI cover, I can't comment on that since we have not tested this. But since the UIM will only be raised by 3mm, it shouldn't change things much.

What do you mean by back out the spikes and dips?

It's possible, but from my understanding, the 2000 UIM will not perfectly line up to the 4th gen LIM, which is what the UIM Spacer was designed from. Plus, since you have a plastic composite intake manifold, the gains may be minimal.

The UIM Spacer was designed using the stock 4th gen LIM. So yes, it should work.

These are CNC Machined out of a high quality glass based phenolic laminate. This material has a very high tensile and impact strength and should easily outlast the life of your vehicle. It can also be reused as many times as you want unlike the materials that most other companies use (ie white teflon and nylon 6).

The loss in HP above 5600rpm is less than 1hp on average. The car was taken to redline during testing, but we used a new dyno system called Auterra Dyno Scan for OBDII vehicles. It's a very nice system! Much nicer than the Home Dyno system we were using before. This functions the same way as a chassis dyno. It takes the RPM reading, but since there are no dyno rollers, you have to accelerate the car on the street. Once you enter in all the parameters (curb weight, gear ratio, final drive ratio, drag coefficient, frontal area, and tire diameter), it's just as accurate as a chassis dyno, if not more accurate since you are physically driving the car on the street. All that matters is that the runs are consistant from one run to another.

Now since the system is pulling the RPM readings straight from the ECU, it can be a little sluggish. The car was taken up to 6600rpm, but due to the stock gauge being inaccurate, that is an actual 6300 rpm according to the ECU. That is why you only see the dyno chart go up to about 6200. But each dyno run was taken up to 6600rpm on the stock gauge.

And I don't think this will cause any type of noticeable power loss with FI'd applications. But since it hasn't been tested, we can't say for sure. But we are only talking about 0-2hp.

The final price has not been determine just yet. But currently, it's expected to be close to what the VQ35DE kit is priced at. It shouldn't be more than that though.

Yes.

$225 plus shipping. Please visit www.NWPEngineering.com for more information.

 

I doubt the ports will line up perfectly to the 5th gen LIM and UIM. The biggest thing with these spacers are that they are port matched to the stock intake ports. Almost all other spacers on the market are simply gasket copies and we all know that OEM gaskets are not port matched.

 

awesome that sounds good. When should the price be set? Just thinking of adding this to my 00vi this summer now.

 

We hope to have a definite price within a couple weeks.

 

Alright!! You did it Aaron!! I need to start saving now to get me a set of these. I know I am not alone when I say Thank You for all the work you do to improve and maximize our Love for the Maximas. See you next month at the meet.

 

I cant wait for them to come out!!!! I'll get my finacial aid, and tax money, and go car crazy! hehehe

So, if i were to order them when they came out, and I soon wanted to do the MEVI or 00VI mod, i'd have to pick 00VI?

 

This is wonderful to see Aaron. #s are looking good and are right where I would need them the most, MEVI.

1 quick question.
I have a bored out throttle body, 70 mm, and I was wondering if you think the throttle body spacer will affect the flow?

 

this would be a great add on when i install my mevi

 

Sweet I think this could be my first mod to the Max Cant wait!

 

More power????

This + Y-pipe + 00VI + UDP = WTF???

 

Are you planning to do a spacer kit for the 2000-01 maximas in the near future? BTW Great work on these spacers...they look very good and seem to perform even better .

Thanks

 

From my understanding, the 00vi will not perfectly line up perfectly to the 4th gen LIM, which is what the UIM Spacer was designed from. I can't comment on which UIM you should choose. I would pay close attention to how well the ports match between the UIM and LIM.

The TB Spacer has a bore of 63.4mm. But, it can easily be enlarged. I would recommend using sand paper cartridge rolls while the spacer is bolted onto the backside of your TB. Then continue enlarging the Spacer until it perfectly matches the TB itself.

WARNING: If you do any porting on these spacers, make sure to wear a face mask or respirator since enhaling this fine dust is very hazardous!

The 00-01 Maxima has a plastic composite intake manifold, the gains may be minimal since you are not effected by heat soak nearly as much as other Nissan engines. I will not produce a product unless it has noticeable results. But it is something we may decide to do testing on in the future.

 

Nice product man. Thats going on mine asap too cant wait to see the price.

 

This is a really great mod, but have many of you actually read what these spacers do?

They lower airtemps so that your HP and TQ don't drop as the engine heats up. Basically they are preventing heat soak. As you go to the track and race a bunch of times or if it's a really hot day you're engine's HP and TQ will drop because engines make more power on cooler air.

This mod is a mod that maintains HP and TQ as your engine gets hotter because less heat is transfering to the upper intake manifolds. So instead of you making less Hp and Tq because the air entering the engine is so hot, you maintain what your normal peak Hp and Tq should be at cooler temps.
It doesn't add HP and TQ on top of what you currently make.

Now this is still a wonderful mod. I'm happy that Aaron was able to get a 4th gen test vehicle. I will definitely be buying a set.

Now if I have any of this incorrect by all means set me straight, but I've been following this mod through the 3rd and 5th gens and from what I understand, this is how they work.

 

Alright, let us know...I am sure there will be a noticeable difference between the lower to heads, probably not much of a gain on the uim and the tb.

I'll be keeping my eye out...

 

Yes, that is correct. They prevent you from losing HP due to heat soak. But also, since these spacers lengthen the intake runners, they will also provide a gain in low end and midrange power. And since they are also port matched and eliminate the need for the poorly sized OEM gaskets, airflow is improved. So you should notice a power increase even on a cold motor. I certainly did. But the gains are really noticed in the summer time when your car no longer gets sluggish after only 15 minutes of city driving!

 

spacers look great!

 

Great to see the dyno, Aaron, thanks for the heads up via email, dyno looks pretty good as well. Let me know when the final Price is decided.
Daniel

 

how long before mevi dyno results are ready and do you have plans to dyno with a usim/mevi with a extended rev limiter