NWP DE-k spacer install
Thread Starter
Joined: Oct 2004
Posts: 1,097
From: Toronto, Canada
NWP DE-k spacer install
So on Saturday I tackled the install. It is not for the faint of heart! Took 8 hours total (with some smoke breaks in between). The main issue was the bracket on the back of the VI. It was very difficult to get to. Also I decided to clean out the VI and LIM while at because it was kinda dirty. Over all the material and fittiment (after modification) was excellent. As for gains I feel slight low end, however my car is in need of dyno tuning. To be very honest on a DEK it is not as straight forward an install like a 4th or 5.5 gen. But as a bonus I learned a lot about the motors!
On my 5.5 it was pretty easy. It took a little longer than it was supposed to but I took my time and allowed the RTV to set up before going to the next step. The most difficult part of the whole thing was finding a torque wrench that could go down to 7 ft lbs for some of the fasteners.
As for the gains, low end is pretty good, midrange pulls a bit better and the upper end is just phenomenal.
As for the gains, low end is pretty good, midrange pulls a bit better and the upper end is just phenomenal.
On my 5.5 it was pretty easy. It took a little longer than it was supposed to but I took my time and allowed the RTV to set up before going to the next step. The most difficult part of the whole thing was finding a torque wrench that could go down to 7 ft lbs for some of the fasteners.
As for the gains, low end is pretty good, midrange pulls a bit better and the upper end is just phenomenal.
As for the gains, low end is pretty good, midrange pulls a bit better and the upper end is just phenomenal.
Senior Member
Joined: Apr 2004
Posts: 1,756
From: Fontana, CA
2. Intake manifold spacers also increase the runner length which in theory will still make power over factory length runners.
3. Everyone who has installed these so far on a dek has noticed an increase in power.
Ok. Still doesnt seem like it would do much IMO. the LIM makes up little of the overall, but if something more than the butt dyno warrants it...
Last edited by ChevelleRH; Jun 7, 2010 at 06:01 PM.
there are good gains from the dek motor with the spacers. its not as much as y-pipe but its noticeable and up top the engine pulls hard passed 5k... more than usual.
I would say give the engine 4-5 days to actually even itself out and you will find good consistency. also with an intake filter my gas mileage went up 1-2 mpg on the highway even when going 85.
on the dek the y-pipe n spacers are the least expensive way to see some gains IMO.
for the record the outside of the manifold is plastic but the actual tubing inside has metal. i was suprised to see it when i took off the UIM.
I would say give the engine 4-5 days to actually even itself out and you will find good consistency. also with an intake filter my gas mileage went up 1-2 mpg on the highway even when going 85.
on the dek the y-pipe n spacers are the least expensive way to see some gains IMO.
for the record the outside of the manifold is plastic but the actual tubing inside has metal. i was suprised to see it when i took off the UIM.
The spacers are supposed to reduce the intake air temperature by 40 degrees and make the 5.5 aluminum intake cool to the touch. After the spacer install I can still fry an egg on my manifold, but I still gained 28 peak horsepower in the midrange. So increasing runner length definitely helps.
The spacers are supposed to reduce the intake air temperature by 40 degrees and make the 5.5 aluminum intake cool to the touch. After the spacer install I can still fry an egg on my manifold, but I still gained 28 peak horsepower in the midrange. So increasing runner length definitely helps.
The spacers are supposed to reduce the intake air temperature by 40 degrees and make the 5.5 aluminum intake cool to the touch. After the spacer install I can still fry an egg on my manifold, but I still gained 28 peak horsepower in the midrange. So increasing runner length definitely helps.
Newbie - Just Registered
Joined: Feb 2009
Posts: 8
Took me about 5 hours because of annoying things like that bracket that attaches to the back of the manifold and the bracket that attaches to that bracket. Did find a big mouse nest below the lower part though. Did a 5.5 right after mine. Took less than an hour taking my time.
there are good gains from the dek motor with the spacers. its not as much as y-pipe but its noticeable and up top the engine pulls hard passed 5k... more than usual.
I would say give the engine 4-5 days to actually even itself out and you will find good consistency. also with an intake filter my gas mileage went up 1-2 mpg on the highway even when going 85.
on the dek the y-pipe n spacers are the least expensive way to see some gains IMO.
for the record the outside of the manifold is plastic but the actual tubing inside has metal. i was suprised to see it when i took off the UIM.
I would say give the engine 4-5 days to actually even itself out and you will find good consistency. also with an intake filter my gas mileage went up 1-2 mpg on the highway even when going 85.
on the dek the y-pipe n spacers are the least expensive way to see some gains IMO.
for the record the outside of the manifold is plastic but the actual tubing inside has metal. i was suprised to see it when i took off the UIM.
I have them. install was not bad. I never used a dremel before doing this and I had no problems. I really can say what difference they made because I installed just about everything at once. Headers, exhuast, intake and more. I know many will say they are pointless because the upper manifold doesnt get that hot. My reason for the purchase was the fact that these spacers lenthen the intake runners and reduce lower intake manifold temp. My last reason among a few other small ones, is NWP make parts for maximas. If we do not support the vendor that make maxima specific items then we will have even less aftermarket support. Finally, I will state that I do not notice any low end power loss with my power rod removed. These spacers with my flywheel, pulley, pftb and other mods must make up for the reported loss in the lower rpm band. The car is a 97 VQ30DE with 00vi.
I have them. install was not bad. I never used a dremel before doing this and I had no problems. I really can say what difference they made because I installed just about everything at once. Headers, exhuast, intake and more. I know many will say they are pointless because the upper manifold doesnt get that hot. My reason for the purchase was the fact that these spacers lenthen the intake runners and reduce lower intake manifold temp. My last reason among a few other small ones, is NWP make parts for maximas. If we do not support the vendor that make maxima specific items then we will have even less aftermarket support. Finally, I will state that I do not notice any low end power loss with my power rod removed. These spacers with my flywheel, pulley, pftb and other mods must make up for the reported loss in the lower rpm band. The car is a 97 VQ30DE with 00vi.
Earlier in this thread someone posted that while the uim is plastic on the outside, the inner piping is metal? That kinda renewed my interest. Thanks for the update
Cripes ...
Thread Starter
Joined: Oct 2004
Posts: 1,097
From: Toronto, Canada
Most people who have them are modded. The DE-K install is not nearly as easy as the 5.5 gen install. Took an entire day to install mainly because of the rear bracket holding the Intake manifold to the firewall. Mine took this long as I ored out the intake slightly to compensate for the PFTB. However I would still estimate a good half day due to the modifying and also the amount of hoses on a DE-K motor.
- I would not recommend doing this if it is your only mod, or you have minor mods like an intake only.
- I would highly recommend if you are highly modded or in the process of putting in a 00VI to your 4th gen. The labour is not worth it for minor bolt-ons.
- I would not recommend doing this if it is your only mod, or you have minor mods like an intake only.
- I would highly recommend if you are highly modded or in the process of putting in a 00VI to your 4th gen. The labour is not worth it for minor bolt-ons.
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