Has anyone installed the Stillen CAI on their sedan yet? I'm thinking about ordering one and was looking for some feedback on it. Can you tell the difference in h.p. as their website says it gains as much as 11 hp for the sedan? Thanks guys.

 

don't waste your money, you already have a CAI on your car.
just my opinion.

 

Please elaborate, what do you mean we already have a CAI???

Once you own the best, everything else is just the rest...

 

we have a ram air stile of intake, it sucks in the cool air from the front grill, you really can't get much better than that. your not going to get more horsepower by throwing on a cone filter and stuffing it inside a wheel well. our engines are pretty much peaked. the only way you can squeze more power out of it is by putting turbos, supercharger, or nitro. on it. infiniti / nissan did a good job at tweaking our engines, they already did all the standard tricks to it, for example go test drive an altima with the 3.5 and then drive your g35, the altima doesn't feel like it has half the ***** as our cars, but it has the same engine. another example is that one of the reasons the coupe has more hp than the sedan is that the coupe has an electric cooling fan where as the sedan's is belt driven from the engine, and of coarse i am sure the coupe has advanced timing and the exhaust helps. i just don't see putting a CAI on it doing any good, hell i put a k&n air filter in and i did not notice any gains or losses.
just my 2 cents that i earned from spending 6 years of modding my old car!

 

The G35 has somewhat of an efficient CAI already on the car (the air box). What the Stillen cold air box provides over the traditional CAIs ie. Injen is that it looks OEM, sits higher in the car which provides peace of mind to those who fear hydrolocking the engine with one of those low hanging CAIs by acting like a straw in flooded conditions (although I doubt this would ever happen). I also feel that the Injen sits too low which might be a disadvantage to Southern states owners due to the CAI sucking up hot air from the blacktop (I live in Texas and know how hot the roads here get) thus becoming a HAI. I can also see fun times ahead with replacing or cleaning the filter of an Injen CAI due to the location of the filter element. Don't get me wrong, I think the Injen is an excellent and beautiful product which provides more HP than Stillens, but I prefer the OEM look and the easy access to the filter element. Oh yeah, forgot to mention that the Stillen system acts as a velocity stack. Good luck in your decision. I have since ordered my Stillen from Advanced Imports and await it's arrival. BTW, anybody deal with those guys? It is taking quite a bit of time to get my order here. Below is the link to the site I ordered from.

http://www.advancedimports.com/stcoboxg35.html

Limited Edition Twilight Blue / Premium / Graphite / Xenons

 

Im pretty sure the point of the stillen system is just incorporating the stock intakes good design with a form of venturi effect.

Autotuner.org Home of Hulk Hogan's Supra and a skyline 240sx

 

take a look at the airflow maze the stock intake provides and then look at the Injen and Stillen. Straighter pipes gets you less airflow inhibition. The top of the engine comp is hotter than hell too. I put an injen in yesterday and it makes a difference - they claim 14.2 hp. You can hear it for sure. Car sounds like a vette the shift points on the 5AT. It roars and it's faster now. 250 bucks for 5% gain in HP and no warranty issues...dont forget better gas mileage too

 

SixFive,
yes the top of the engine department is hot, but the stock intake sucks air in from the outside. as long as your happy with it, and it makes your car feel faster that is all that matters. good luck with it.

 

I too was concerned by the lack of a smooth intake flow path on the stock sedan. The inlet/filter box was probably as good as it could be to satisfy several demands. e.g performance, maintenance, reliability. I replaced the inlet duct with the corresponding part from the 350Z. It is a direct bolt-on fit. Now I have a "factory CAI" at half the cost of aftermarket units.

The lower edge of the airbox opening probably could use a radiused inlet diffuser to minimize exit losses, but that will take some thought.

<font color=blue>Dan</font color=blue>

46658-P4300001-small.JPG

 

Dan, could you circle the part you replaced and repost the pic? I can't tell what the mod is. What did it cost, where did you order it from and what is the part number? Thanks.

Limited Edition Twilight Blue / Premium / Graphite / Xenons

 

This is the part. Mine came with a hose clamp at the throttle body end. You have to add the hose clamp from the MAF end of the stock part and the mounting bolt. The entire stock unit is replaced: bellows at MAF, resonator box, and rubber hose at the throttle body. The 1/2" breather hose attached to the top of the stock resonator is attached to the underside of the 350Z duct. Some wiggling of the 350Z duct is required to get it to align properly. The part number is: 16576-CD000, DUCT ASSY. I paid $100.18 plus sales tax at the local Nissan dealer. It was a special order but delivery was one week.

<font color=blue>Dan</font color=blue>

46676-P4300002-small.JPG

 

Nice: Do you notice any difference in sound or performance.

I pulled out behind my G-friend last night and she wigged about how loud the car was when i got home. Sounds like I want attention...just want power.

 

What do the aftermarket air intakes do to cause the car to sound so different, and yet provide little change in performance? I mean, I expect that from a custom exhaust, but you'd think if the engine itself sounds greatly different there'd be some change in performance, whether positive or negative.

Also, are there any quick to install and remove noisemakers like this? That might be something I'd like to have on special occassions, even at 0 hp increase, but not for 90% of the rest of the time. Y'know, not to be ricey, but sort of as a costume you can quickly change out of. Or maybe that's "minute rice."

-Jack
Obsidian/graphite '03 Coupe premium nav

 

The airflow increases power and efficiency beyond the tuning intended for the car. Venturi effect. I gained noticeable power...do not listen to the guy who doesn't have one--he only has his opinion. The car gains 14hp - 5% increase. Not a turbo but it makes a diff. the noise start at 4500-5000 and is really loud at the shift points when flooring it. Not much diff around town. You'll hear a little more growl and hear the intake sucking air. That is good.

And you have the coupe right. Your airflow is better already and your HP is maxed pretty well. You will not get the 14 hp increase in the coupe.

Let the naysayers be in your rearview.

 

SixFive,
How long did it take you to put in your Injen intake, and did you do it alone or does it require multiple sets of hands to do it? Also, where did you buy it from, I am thinking about doing it on my Black G35 sedan myself, but I want to make sure that enough weekend warriors could do it themselves before I attempt to tackle that project on my own. Thanks.

By the way, what kind of performance increase do you really notice, is it any quicker off the line?

Once you own the best, everything else is just the rest...