im pretty sure he means the throttle body reset and idle air relearn procedures

 

Yeah, I thought so. Those procedures are in the installation instructions that are included in every kit. It can also be downloaded for free on my website.

 

A few questions on this, will the bracket on the back of the manifold fit again after the install and did you do any of the dyno runs with and without the Throttle body coolant bypass. Also should is sound like I have an intake afterward. Not as loud as that but I can definately hear the intake making noise now. Not a bad thing but wasn't expected.

 

No, the bracket on the back of the manifold will no longer bolt back up after the spacers are installed.

No, I did not do any dyno runs before and after the Coolant Bypass Fitting installed. But, there shouldn't be a noticable gain. I only did dyno testing before and after the spacer kit was installed. By bypassing the coolant, it prevents the intake manifold from getting as hot. It helps in conjuction with the Phenolic Spacers.

After installing the spacers, most notice a change in intake noise. If you have a cone filter installed, you may notice a whistling noise at part throttle. If you have a completely stock intake, then the tone should get a little bit louder due to the better airflow you are getting by eliminating the stock gaskets.

If you install a cone filter now, the noise will increase further. Anytime you improve airflow, whether it's spacers, bored throttle body or cone filter, the intake noise will usually increase and/or change in someway or another.

 

mine whistles super loud, sounds like a turbo dump diesel spooling. of course, thats only under light/medium acceleration and not while cruising or hard acceleration. its not a vacuum leak cause the car pulls super hard still and the afr is the same as before. anybody got a fix for the loud whistle besides stock airbox? i can deal with it but...when i drive anywhere, anybody walking on the street can hear it its that loud.

BTW: great job on the spacers, i really like them and im pretty impressed with the temp drops. i can def feel a little gain in the midrange, really compliments the SSIM

 

What bracket are you talking about?

 

theres a bracket that bolts to the manifold elbow. the bottom of the bracket bolts to the block. if you leave it on the manifold wont seat correctly if youre lucky enough to even get it on.

BTW: the bracket bolts at the block, they dont need to be threaded back in correct?

 

Sorry if this was already mentioned in the thread, but what is the expected time frame to install the spacers, level of difficulty and any special tools required?

 

took me an hour, but ive had my manifold apart 4-5 times already. i would expect someone with no prior manifold info to be able to do it in under 3 hours. its not hard at all, really not even a lot to take apart. the instructions are also pretty easy to follow

 

damn no spacers for thVQ30DE yet been waiting for spacers for the 4th gen

 

I take it this bracket is not required then?

 

guess not

:attention

 

No I just want to get all of the info on the mod b4 I get it and put it on...sorry but I don't just buy the first thing I see and slap it on and hope that it doesn't f*** up my car... I know the spacers will not do this but I just wanted to know what you guys were talking about.

 

takes 2-4 hours to do
just normal sockets required
that bracket is not needed...the IM isnt going anywhere

 

I really don't want to do any mods that will make my car much louder than stock, and adding midrange torque makes freeway merging all that much easier.

 

by themselves, they wont increase the sound. these plus intake and exhaust will.

the midrange increase is amazing

 

This looks interesting....Will the power increase be there even if the engine hasn't warmed up enough to make the upper intake warm?

 

Most of it should be, especially in the midrange. The spacer will increase runner length and intake velocity.

 

What if the spacer were a little bigger....

 

Either the intake would hit the hood or you'd compromise high rpm performance. Similar principle to using carb spacers back in the olden days.

 

Best to not get too greedy then. Since it seems to work, I'll have to try this out.

 

And it's not like these cars have much to lose up top.

 

BINGO! Most of the power will still be there even with a cool motor since these spacers are port matched, they eliminate the need for poorly sized OEM gaskets, and they increase intake runner length without sacrificing ANY top end power.

If you made a 3" spacer, it would drastically hurt top end, but you'd see a nice gain in low end power. So there is a sweet spot that was considered when designing these spacers and choosing material. Material has a lot to do with it. If you make these spacers out of aluminum, heat will be transferred and the intake manifold will still heat up. That will defeat the purpose of installing spacers on the VQ35DE.

The material that these spacers are made of are a very durable type of phenolic laminate that can withstand extreme temps while being compressed. I mention "compression" b/c the properties of the material change greatly when under pressure. For instance, Teflon and Nylon 6 do not hold up well when sandwiched between two aluminum intake manifolds. Over only a period of a month or two, they will soften and mishape.

Our material is very hard and requires the need for gasket maker. They will easily outlast the life of your car and can be reused indefinitely. You can't do this with teflon and nylon 6 that other companies use.

Since this material is so hard and durable, careful attention was made to ensure the material expands and contracts similiarly to the surrounding aluminum so intake leaks won't develop overtime.

 

I take it that when installing the spacer, it would also be a good idea to change the spark plugs as well? I just looked through the procedure to change the plugs and to get to the rear plus the intake has to come off anyway. Minus whale take advantage of the intake being off, right?

Honestly, when plug changing time comes, I can't see not going with the phenolic spacer.

 

Did you really just type that?

Yea it would be a good time to do that.

 

Until you pointed it out I just read it like it was perfectly normal..weird.



Yes, definitely change your plugs when installing spacers.

 

Yes, I really did. I thought that trend was internet-wide by now.

 

You should also consider changing the rear rocker cover with an 04.

 

What is a rocker cover?

 

Good question, since VQ's don't have rocker arms.


Seriously though, it's what we call valve covers.

 

Nissan still calls it a rocker cover. Some other manufactures call it a valve cover, top pan or top engine oil pan cover. It is the cover on top of the cylinder head and the rear cover are known to allow oil to leak into the spark plug tube on the 02-03. The 04 or 6th gen cover is supposed to be better and it is also cheaper. If yours isn't leaking now chances are it will be leaking soon so if you have the intake manifold off it is only easy to change. I think I paid $36-$38 for it so no big deal with cost and it includes a new PCV valve installed.

 

Thanks, good advice, nlmaxima.

 

Understood.

 

nissan calls them valve covers...i have the invoice with the name and part number for the front and rear...valve cover

 

Depends on where you look. Nissan FAST calls them "COVER ASSY-VALVE ROCKER".

 

Are you sure about that?







and from the FSM...

 

Definitely change your spark plugs when installing these spacers, especially if it's getting close to your changing interval.

"Minus Whale"... that's a new one to me too.

 

Look for my order sometime after Christmas....

Seems like the ideal mod for an automatic since the car lays down just a touch right after shifts, the added midrange torque would be very helpful. Best of all, my car will still sound stock. I didn't really care about having a quiet car when I had my Chevelle, especially with the big cam I was running and the nasty lope it had. V8s sound great if they have a throaty exhaust, V6 engines, not so much. Plus, I drive up to Kentucky and back once or twice a year and loud cars suck on road trips.

 

Feel free to contact me anytime if you have anymore questions.

[aaron@nwpengineering.com]
www.nwpengineering.com

 

I guess I started all this! At least now I know what they are really called Rocker sounds better anyway.