Which intake kit?

E

eJay

Member
Location
Fairfax, VA
I am looking into getting the first performance mod for my FX! CopperFX is selling his Fujita F5 and I really wanted to buy it from him because it's a really great deal. His "combo" includes the F5 intake, Billet spacer, and a filter for $155. Another option I have is the Stillen intake kit with the z-tube and hi-flow filter ($271). The main differences are that 1) Fujita is dry filter whereas Stillen is oil, 2) Fujita kit does not have a heat-shield unlike Stillen, and, of course, 3) the price.

I did a lot of research both on the scene and on Google but couldn't find a definite answer regarding my question.

Here's a summary of my questions:
1)Which intake system would you go with if you were to choose?
2) Is the heat shield a big factor? Should I be concerned that the Fujita kit does not have one?
​

I'm leaning toward Copper's intake cuz I feel like you can't beat the price but my main concern is the heat-shield.

I have to let Copper know asap so any quick input will be greatly appreciated!

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Don't overpay for Stillen. I'm probably going to pick up a used Stillen (w/o ztube) for $125.

How much do you really care about the power? Heatshield is worth it, but only to an extent.
 
wow that was fast. Anyways you think so? It is almost double the price of the Fujita. I was thinking I can save up the difference for another mod later. Maybe lowering.
 
i would take Fujita. like Stu said, stillen's way overpriced. heat shield is useful but not so effective that you HAVE to have it, not at all. matter of fact, you can custom make it.
 
eJay said:
Why is the Stillen intake so expensive compared to other intakes?
Click to expand...

I once tried to buy one of their milled aluminum venturi rings seperately for an intake project I was working on, and was told that it constitutes such a large portion of the price of the intake kit that they won't even consider selling it on it's own. Basically, that piece (it connects the filter to the MAF tube) is the reason it's so expensive.

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Does that part make a really big difference? And what does a "space" do? Pmanliu said that it allows more air flow but how?

Sent from my ADR6300
 
eJay said:
Does that part make a really big difference? And what does a "space" do? Pmanliu said that it allows more air flow but how?

Sent from my ADR6300
Click to expand...
The throttle body spacer has these grooves in it that I guess help to funnel the air into the plenum. It reminds me too much of a turbonator thingy so I personally don't like them. And gto said it messes up your air/fuel requiring a tune. I've heard with a tune they do help though.

Here's a review saying it does nothing: http://g35driver.com/forums/reviews/175673-throttle-body-spacer-review.html

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I see I see. That wind spinning thing makes sense (in theory). The people on the thread you provided actually said they noticed a minor performance increase. To quote them, it's not a "neck jerking FI power" but "absolutely without a doubt I felt more torque in the low to mid rpm range!!!". Another person further down said the same thing. I am thinking that it may all be in their heads but since Copper is selling it with the package, I'll try it out anyways :)

I'm waiting for Copper to ship the intake. I know a simple intake wouldn't turn my ride into a rocket but I am still excited!! This will officially be my first performance mod on the ride!

btw I never knew such thing as "turbonator" existed haha
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Very cool first mod. I've helped a couple friends install new intakes on their trucks, and man I love that noise! Makes me smile every time.
 
eJay said:
Does that part make a really big difference? And what does a "space" do? Pmanliu said that it allows more air flow but how?

Sent from my ADR6300
Click to expand...

Sorry, I misspoke. The Stillen part is actually a "velocity stack", not a venturi. Its function is to provide the MAF sensor with laminar air flow, not to spin the air. It is very effective at reducing turbulence at the sensor, which is relatively effective at increasing engine efficiency.
Regarding the throttle body spacer; the funtion there is to increase the plenum volume in the same way that a plenum spacer works, but with a much simpler/cheaper/easier to install part. The concept of plenum volume is pretty complicated, but the reason it works so well on the 1st gen FX is that the OEM plenum was developed for the 350Z, which has a very limited amount of space between the intake manifold and hood. Ergo, the VQ35DE plenum is much smaller than it needs to be, and shaped for poor air flow to the "front" cylinders (slanted downward in the front. Again, due to the 350Z hood slope). The fact that some plenum spacers incorporate the venturi "fins" inside and claim to benefit from spinning the air is, IMO, marketing bs.


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haha i see you stumbled upon the superturbocharger +500hp eric. Wait till you find the magically chip that does +200hp and +20mpg. gahaha
 
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