Phenolic Spacer Development for VQ35s
It pays to shop around. $240 is the highest I've heard of. Most get it done for $150 or less. There is no reason for a shop to charge you for more than 3 hours. So by using a $60/hr rate, it should cost between $120 - $180 to have these spacers installed by a mechanic.
Yeah it was a little high. I guess it kind of offset though because they gave me a free oil change w/ Mobil 1 synthetic.
Low end is really great now. Kind of did for the low end what a Fujita does for the top.
Low end is really great now. Kind of did for the low end what a Fujita does for the top.
I quess the oil change wasn't free. I paid 150 dollars to get them installed. Good luck with them.
I spent $1700 the week prior getting my wifes BMW fixed. I told them I needed an oil change on my car and they were like just bring it in and we'll take care of it on us.
I have to say the mechanic really ribbed me about the spacers...how I waisted my money and how they weren't going to do anything at all. Just had a look on his face like I was a huge sucker.
Soon as I pulled off the lot I slammed the pedal and wheels were screeching from the Tq....lololol
Last edited by JG1; Sep 19, 2007 at 05:38 AM.
As mentioned previously by others, now that I've done it I can say it'd take me a couple hours to do it again. The problem was I didn't have a small "clicking" set of wrenches and I was very careful to not break or drop anything into the engine. Followed the instructions to a T.
The whistling is normal, especially if you have a CAI. I think it sounds great myself! I rode in one of my customer's 6th gen (Ritz) with CAI that had this whistling and it sounded REALLY good! The 5.5 gen that I tested myself didn't whistle at all. He had a short ram intake.
You know I was listening last night and I swear it's my Fujita thats making the whistle now.
Why would the spacers make a previuosly quite CAI now whistle?
Do they change the way the air is drawn in somehow?
Keep in mind that every time you put a cone filter on a car, the intake tone will change. For every single cone filter I've put on a car, it whistled. I've done over 10 intakes on different cars, ranging from the VE, 5.5 gen, 6th gen Maxima, 1.8T Passat, VQ40 Frontier, KA24DEs, V6 Accord... that's about all i can think of.
Every single one of them whistled in some way or another.
Now, these spacers eliminate the need for the stock oversized gaskets. Anytime you smooth out the airflow the intake noise will change in some way. You did improve the airflow by installing these spacers, so whatever noise the CAI was making before, it should be louder now.
One guy on this forum siad he removed the TB spacer and the whistling went away. It could possibly be the fact that the Elbow is now lengthened by at least a 1/4".
But whenever you improve airflow, whether it's by spacers, cone filter, removing a resonator, or port work, the intake tone will change. My VE with cone filter whistled the same before and after spacers. But I didn't eliminate a thick metal UIM gasket like you did. The VE uses a thin paper UIM gasket.
I will speculate that, the spacer between the elbow and the UIM is misaligned, acting as a 'labium', and causing the air in the UIM plenum to resonate, causing the whistle. The spacers at each end of the elbow experience the fastest moving air. Air between the plenum to the heads travel at a much lower speed where, IMO, have a lesser probability of causing the whistling. I have zero musical talent so I may be way off.
Mine does not whistle at all but I double checked my installation that the spacers were not misaligned and removed the excess RTV gasket that had oozed into the ports.
I will speculate that, the spacer between the elbow and the UIM is misaligned, acting as a 'labium', and causing the air in the UIM plenum to resonate, causing the whistle. The spacers at each end of the elbow experience the fastest moving air. Air between the plenum to the heads travel at a much lower speed where, IMO, have a lesser probability of causing the whistling. I have zero musical talent so I may be way off.
I will speculate that, the spacer between the elbow and the UIM is misaligned, acting as a 'labium', and causing the air in the UIM plenum to resonate, causing the whistle. The spacers at each end of the elbow experience the fastest moving air. Air between the plenum to the heads travel at a much lower speed where, IMO, have a lesser probability of causing the whistling. I have zero musical talent so I may be way off.
The mechanic said he followed the instuctions to the letter, and I seem to have the same whistle (partial-1/3 throttle) that others have posted about.
Is there a way "I" can check to see if that part is indeed misaligned, even though I didn't install these spacers myself? Or would I just be chasing my tail w/ it?
How easy is it to misalign that spacer between the elbow and UIM?
The mechanic said he followed the instuctions to the letter, and I seem to have the same whistle (partial-1/3 throttle) that others have posted about.
Is there a way "I" can check to see if that part is indeed misaligned, even though I didn't install these spacers myself? Or would I just be chasing my tail w/ it?
The mechanic said he followed the instuctions to the letter, and I seem to have the same whistle (partial-1/3 throttle) that others have posted about.
Is there a way "I" can check to see if that part is indeed misaligned, even though I didn't install these spacers myself? Or would I just be chasing my tail w/ it?
As for the TB spacer, it's pretty noticable if you install it upside down. If you press the TB spacer on the elbow as the instructions say, it said to make sure the port and the bolt holes line up. If they don't line up, then you have the spacer upside down. If the spacer is upside down, the port will be about 2 or 3mm misaligned. It's pretty noticable if your mechanic followed my instructions. Which I'm sure he did.
There's no way to tell without removing the TB yourself. I'm sure it's aligned correctly. And that's not what's causing your whistling.
The whistling occurs in about 75% of Maximas and Altimas. It mostly depends on what type of intake you have.
I just have to learn to love the whistle 
BTW, you guys are going to love these spacers. My car feels SOOOO much stronger out the hole. I don't feel anything on top, but that bottom is really fun.

BTW, you guys are going to love these spacers. My car feels SOOOO much stronger out the hole. I don't feel anything on top, but that bottom is really fun.
Originally Posted by Aaron92SE
The whistling occurs in about 75% of Maximas and Altimas. It mostly depends on what type of intake you have.
My question is, why is the whistle increased?
I have never come across another spacer on the market that actually port matches their spacers! Most stick with the design of the gasket and let the spacer have oversized ports. But by doing that, you can actually hurt performance more than stock when you make a 1/4" thick OEM gasket!
Since you have a stock intake without a cone filter, my guess is that you should either hear no whistling or a very quiet whistle.
I'm not 100% sure if it's only the Fujita CAI doing the whistling. I believe other types of intakes have done it, like the Berk. The only way for me to find out exactly what's causing the whistling is to first find a car that is whistling, then isolate each component one at a time starting with the TB spacer. But since the whistling doesn't hurt anything, I see no reason for me to conduct further testing. Most people absolutely LOVE it.
I heard Ritz' 6th gen and it whistles at part throttle. It's nothing too loud. It's not so much a "whistle", it's more of a tone that the engine is making that sounds like a turbo. If you've ever heard a turbocharger spool up, it's not really a whistle or a whining noise, it's hard to explain. It just sounds like air moving REALLY fast. The word whistle is the only thing that can closely describe it.
But I thought Ritz' car sounded REALLY good! And I'm not just saying that. I first heard it at a meet we had in NC. Someone told me he has the whistling from these spacers. I made him take me for a ride b/c I had to hear it for myself. I instantly said, "WOW! I like it!". And those who know me know I'm the furthest thing from being a ricer like my boy Bubb Rubb.
The VQ35 spacers are on backorder right now. I had a sudden increase in sales recently. I'm already getting more made, but they probably won't be available until early to mid Oct.
I'm still taking orders though at www.nwpengineering.com.
Thanks Mack.
Orders will always be excepted!
Please visit my website to secure your order.
www.nwpengineering.com/Phenolic_Spacers.html
Please visit my website to secure your order.
www.nwpengineering.com/Phenolic_Spacers.html
I have the phenolic spacers, havent installed them yet, but.... i have a 1' throttle body spacer and that added a significant amount of whistling to the car. Its removed now and the whistling is gone.
I'll be installing the spacers after i come back from Cali.
Kamski
I'll be installing the spacers after i come back from Cali.
Kamski
Last edited by Aaron92SE; Jan 14, 2008 at 08:46 AM.
If anybody has any product specific questions, please feel free to post here. I am still monitoring this thread.
Also, if you want a FREE pair of NWP Engineering decals, please send an email to [aaron@nwpengineering.com]. You do not have to be an NWP customer. This offer is open to everyone!
Also, if you want a FREE pair of NWP Engineering decals, please send an email to [aaron@nwpengineering.com]. You do not have to be an NWP customer. This offer is open to everyone!






and it'll obviously run cooler.