I think there may be something to that (stock) if modified correctly, but I still like the JWT Pop charger with outside air forced toward it by the snorkel.

Here are some links of (I think) unbiased reports of what it does on the dyno:

http://www.sportcompactcarweb.com/tech/0307scc_projser/

http://www.nissanperformancemag.com/...ima_july02.php

 

I'm curious of modifying stock. I'm running K&N panel with resonator removed. I get the sound, but I feel less initial torque though slightly more pull from mid range on. Is it only "sound" faster?

 

I have the Injen CAI and I'm happy with it.........

 

I felt less tq down low when I had the Injen and Berk. Stock airbox just seems to feel better downlow and with the res. and snorkel removed im sure it breaths a lil better up top. Kinda like the GAB for the 5.5 gen guys.

 

Thanks. I'll check more into that.

 

http://importtuner.com/tech/0201it_topproducts/

http://www.eurotuner.com/techarticle...ke/index1.html

http://www.nissanperformancemag.com/...projectaltima/

http://truckinweb.com/tech/0407tr_aem/

 

One counts as fraud, the other is wishful thinking.

 

No fair obscuring the issue with mere facts.

 

I don't see any here on the .org ... Learn the hard and expensive way, the ones who know are the ones who have the dynos and track #'s to prove it ... not links :

 

Look at the cars tested, and where they generate peak power. Then think about how they got the engine to deliver peak power where it does. Now look at our vq35DE and how it makes power. What makes you think the two respond in the same manner. Do all of us a favor and go do a comparison dyno and post the slip. $20 your way if it makes more than 3hp across the board.

 

Facts on another car with a totally different engineering philosophy. Prove me wrong with a dynograph of your own and then we'll talk

 

What they know is more air = more power

What they dont know is that Nissan exhausts are insanely restrictive, and the intake manifolds are not optimized for high rpm running, both of which are needed to take advantage (read:make power) with an intake.

 

LOL, exactly. I was gonna point that out but figured I wait and let one of yall take a stab at it.

 

The real tragedy is how much you guys are willing to pay for a cold air intake.

 

$200 = $.05 in terrms of gains....

Or $200 on more ... beneficial items ...

E55 summed it up, and well, I'd say case closed ... and very sad to pay that much for an intake ...

 

Yes I'm sure that there are vast differences between the VQ35DE on the Altima and the one in the Maxima. :

 

Yes... you seem surprised to learn that peak torque occurs at lower RPMs and peak HP occurs at higher. :

 

I was thinking the same thing. One of the links I posted used an Altima..should be very similar results in a Maxima IF the test wasn't rigged (and I doubt if it was).

 

I agree with this to a point but consider this....if you supercharge this car and leave the exhaust alone, would you expect to see any gains? Now, you wouldn't gain as much as if you also changed the exhaust, but I bet that you would still see quite a bit of added power...across the board.

The restrictive exhaust will reduce some the added power, but it won't negate it 100%.

Still, your point is well taken.

 

What's hilarious is that guys on here keep knocking people for spending money on something that they like! To say that it's not worth the $300+ rocks for an intake that literally gives you a buzz everytime you sit in the drivers seat and fire it up, is ridiculous. So you get thousands of buzzes for $300 plus, you do the math. Also people keep saying the gains are zero, that's a joke too! Before I got the intake, my tires would not burn, i.e. spin when gunned. After the intake and on a cold morning, it's ugly! Can we say major low-end torque! I'm no car expert, but it stands to reason that more air, cooler air and less restricted air equals more power. Admittedly, the gains may not be "as advertised", but they are there, no question. Also, the look and sound are SO OFF THE HOOK, that if those were the only positives, it would be worth it to me! I like my stuff pimp, ya' hurd!! PEACE OUT...
[/IMG]http://memimage.cardomain.net/member_images/3/web/675000-675999/675763_121_full.jpg[IMG]

 

Aaaaactually, were you to do the exhaust as well as s/c, you would see more gains (better cylinder scavenging). The difference between this and a CAI is the fact that air is being forced into the cylinders (by the supercharger) rather than being pulled in by cylinder pulses. Cylinder pulses can only be improved in strength by improving cylinder scavenging, therefore no pipe you simply strap on is going to improve the pulse being generated by a cylinder that is being filled. That is, It only works that way if the induction system is very restrictive (vq35de's is not) and only on the top end (which the vq35de does not benefit from without major modification).

 

Its 100% fake, the dynograph is an excel file.

 

Agreed (I meant to mention that too...thought I did).


I'm not sure of all of the dynamics involved, but I believe the theory behind the JWT Pop charger (and I assume most CAI devices) is two fold:

1) Less restrictive air flow than stock
2) "Smoother" air flow

Here is another test usign a 350Z (and this one isn't an Excel spreadsheet): http://www.nissanperformancemag.com/june03/350pop/

Also, I know that prior tests with other engines that just changing over to a K&N style filter did result in modest inprovements in 1/4 mile times (and old Hot Rod Magazine article). Maybe they were paid off by K&N, but then again maybe it really does help (the "smooth" air flow theory).

I guess it boils down to this...until we have someone here who gets their stock car dynoed, then only adds an intake then gets a dyno we really won't know for sure just how much difference (if any) it makes.

In the mean time, my suggestion would be to either mod your stock system (have heard the snorkel really necks down internally) or go with the JWT setup (much less money...and Jim wolf is well known in the Nissan circles for manufacturing products that do work).

 

1) JWT is crap...ask around

2) I have done this test.....seriously there were no measurable gains whatsoever from changing to a CAI or pop charger. On a stock 03, it lost .04whp and gained .6ft-lb by switching to the JWT popcharger. There is not enough difference in those numbers to rule out dynamometer error. I have the runfiles to prove it.

3) They are using a dynapack dyno, and that is DEFINITELY NOT what the readout looks like

4) after reading the article, they claim that the induction pipe is what creates induction pulses......The mere fact that they spew such nonsense only maginifies the fact that they are ignorant and their readers are moreso for believing them. Now, were they smart, they would say better intake tubing aids in maintaining the strength of said pulses...however the CAI on the 6th gen is very well engineered. The only part that could be restrictive is the snorkel, but anyone who has ever dissasembled the stock CAI will notice it has the capacity for a lot of air volume.

5) If you have ever used a flow bench, K&N filters do actually flow better. HOWEVER, the filter may have flow capacity greater than that of the engine itself. Basically, there was no real restriction in a total volume sense, but rather in a total volume per second sense. Therefore you wont see real gains..just better throttle response. Ive tried the panel filter thing vs stock intake in the 1/4 mi on my 03 (when it was stock) and the time were within .01 (14.66 to 14.65 both at 89mph) sec before and after. Suffice it to say that there are too many variables to clearly state it was the filter that made the improvement.

6) Turbulence in the airflow up to the cylinders is irrelevant, turbulence only matters inside the actual cylinder. The only real time it matters in the intake tubing is when the air is passing the MAF sensor...hence the screen on the intake side of it (some BMW MAFs actually have a smoothing fins because the MAF comes just after a 90 degree turn in the intake tubing).

 

Hmmm..that's odd to me (no sarcasm intended). I thought that they had been in business for over 30 years and had products "used worldwide at every level of motor sports activity, from Nissan Factory Race Teams to Street legal performance..."

Unless this claim is a complete fabrication (maybe it is...I don't really know for surre as I have not checked into it), then I would think that a factory Nissan race team would know what works and what doesn't...more than any of us here do for sure.

Look, unless there is a vast conspiracy out there and JWT is paying off all of the magazines that I quoted, then their intake works. Not saying it couldn't be "payola", but it would have to be a lot of it!

 

I tried their "popcharger" and the #s were posted in my previous post...aka no difference.

Nissan did not have a factory race team based in the US...ever, so he may have given them something when they were in a pinch when they were racing here in the US and he calls it that...but either way, from my experience, I dont believe it.

 

Mother of God I hope that's a typo.

Even if it is, a 99mph trap for those times seems high for a nearly stock auto

 

89mph is high?

 

I meant to say, I figured you typod 89 and emant 99, but even at that 89 is low, and 99 is high ...

 

Here are two articles about the VQ35 in an Altima SE/SE-R which address a lot of the questions about CAI and air flow.

http://www.nissanperformancemag.com/.../nismo_intake/


http://www.nissanperformancemag.com/...5/tecnosquare/

 

So now you're claiming that both dynos of the VQ35DE with the AEM are fakes ?

 

there is something funny about the #s on the first article

The TS article is legit though.....I was the donor for the 5.5gen ecu

 

Yup, it really isnt hard to get the dyno #s you want when you plot the data yourself. Call up AEM, and ask them for the runfiles....$100 says you wont get them

 

See this? http://www.savagecat.us/maxima/21-54...0for%20web.pdf

 

FWIW, I wrote JWT and the Nissan Performance Magazine that did the dyno. I asked JWT to tell me what parts are used on the factory Nissan, and asked the magazine to comment on why the dyno sheet did not seem to match.

We'll see if they reply and what they have to say.

 

Several posts back I mentioned wondering if a CAI really brought in cooler air.

Here is an interesting thread from another board on that topic that will shed some light on it:

http://www.b15sentra.net/forums/show...ature+CAI+test

Long story short, this guy measured the temp and at speed (not sitting on a dyno) the temps are about the same.

Now, had he measured on very hot days, I bet that the CAI may actually have shown a higher temp than the pop Charger given the heat coming off of the pavement.

So, IMHO, modified stock or pop charger is the way to go...of course, it may not look as nice as that $200 CAI setup.

 

excel.....

 

I'm noticing a trend. Every dyno you don't like you simply dismiss as Excel. :

 

It's because it should look like this



An actual RUN FILE from dynojet.

 

Its obvious you know NOTHING about dyno work. NmexMAX has what it should look like down. Do us all a favor, click here and go get some dynos done. Then go here, download the software and then tell me the **** you posted is a real dyno.