STILLEN Longtube G3 Intakes. Review, Dyno and Impressions.

MightyBobo · 03-28-2009, 03:49 PM

Quote:

Originally Posted by Asheth

Hmm have a couple questions.

1) After install would be recommended to reset the ECU?

2) Is a tune necessary or beneficial after this mod i.e. will you see even more gains after a tune?

Although I dont know how to reset the ECU right now, I know anytime you much with the intake, it was good to reset LS1's ECU - this Im sure is no different.

Tune will almost always be beneficial. Necessary, no.

Asheth · 03-28-2009, 03:52 PM

Quote:

Originally Posted by MightyBobo

Although I dont know how to reset the ECU right now, I know anytime you much with the intake, it was good to reset LS1's ECU - this Im sure is no different.

Tune will almost always be beneficial. Necessary, no.

I think for the ECU reset on the 370z and Same for G37 there is a Pedal code which is a little harder and you can just disconnect the Negative battery cable overnight. But you lose radio presets.

The pedal code has been in Nissans and Infiniti's I believe since the 98 Maxima. This is what i found through research. But G37 drivers can confirm!

SoCal 370Z · 03-28-2009, 03:53 PM

Quote:

Originally Posted by semtex

I believe that styrofoam block is actually part of the crash structure. Like it's there to absorb energy in the event of a collision, so taking it out probably isn't a good idea.

You are correct, and there is also a second reason:

Please do not remove your impact styrofoam, at the request of crash test dummies around the world.

semtex · 03-28-2009, 03:59 PM

Quote:

Originally Posted by Asheth

I think for the ECU reset on the 370z and Same for G37 there is a Pedal code which is a little harder and you can just disconnect the Negative battery cable overnight. But you lose radio presets.

The pedal code has been in Nissans and Infiniti's I believe since the 98 Maxima. This is what i found through research. But G37 drivers can confirm!

I disconnected my battery after the exhaust install, and did the same thing after the intake install. I just jot down all my settings on a sheet of paper so that I can easily program everything back to the way I want it. Interestingly enough, you lose all your radio presets, but not any of the XM presets. Other stuff that has to be set back includes audio settings, shift light rpm, oh and this is an important one -- when you hook the battery back up, SRM is off.

dad · 03-28-2009, 04:00 PM

Quote:

Originally Posted by SoCal 370Z

I respectfully disagree as there are two radiator fans pulling-in and evacuating hot air out of the area where the filters reside. If you use your theory then the factory layout is even worse.

Correct me if I'm wrong! One fan is for the radiator, the other is for the A/C.
I believe the A/C fan only comes on when you run the A/C.

Asheth · 03-28-2009, 04:04 PM

Quote:

Originally Posted by semtex

I disconnected my battery after the exhaust install, and did the same thing after the intake install. I just jot down all my settings on a sheet of paper so that I can easily program everything back to the way I want it. Interestingly enough, you lose all your radio presets, but not any of the XM presets. Other stuff that has to be set back includes audio settings, shift light rpm, oh and this is an important one -- when you hook the battery back up, SRM is off.

Thanks.

SoCal 370Z · 03-28-2009, 04:04 PM

Quote:

Originally Posted by dad

Correct me if I'm wrong! One fan is for the radiator, the other is for the A/C.
I believe the A/C fan only comes on when you run the A/C.

Do not know...I'll have to see after a drive.

RCZ · 03-28-2009, 07:26 PM

I'll post again when I get home, but fyi the easiest way to reset an ecu on any car is to disconnect the battery and pump the brakes. that's it, there is no magic. that discharges the system and then just reconnect battery and ur done. I've done it many times on many cars.

Neo187H · 03-28-2009, 08:04 PM

Resetting the ECU is totally unneeded for installing intakes or exhaust, drive the car for 20 miles with the new modifications installed and the ECU will adapt to it if it requires adaptations at all.

RCZ · 03-28-2009, 08:31 PM

Quote:

Originally Posted by Endgame

RCZ... Well done Sir!! This is excellent and most encouraging news. Not to mention this thing sound HAWT!!!

I know it has been covered before, but I must ask... Are we SURE this will not cause further cooling issues with the partial blockage of the radiator with the bumper on??

Josh feel free to chime in on that also...

There may be a half hp difference...this is one of those things that makes no difference...

Quote:

Originally Posted by MightyBobo

Well done RCZ - thats funny, I seem to remember a discussion where I was saying something to the tune of 310 WHP with a top quality I/H/E setup and you agreed with it....hmmmmmm, eh?

I agreed because its possible... I didn't think it would be this easy though.

Quote:

Originally Posted by steronz

Still, it'd be nice to know for sure rather than suspecting. I mean, they were on the dyno, the bumper was probably sitting a few feet away... would have been nice for them to slip it on and see if there's a difference.

Sorry, but things like these don;t make much of a difference. This is air we are talking about, not water. There's plenty of air and plenty of cold air flowing through there when the car is actually moving. If you want to talk about the details, you gotta take that into account too. The dyno is sitting still, granted there is a fan, but its never going to mimic the air flow it gets when you are actually moving. If anything it would have LESS heat soak and perform better on the street.

Quote:

Originally Posted by semtex

Hey RCZ, have you noticed any change in the interior sound from the intakes? I haven't noticed anything significant from mine, but I suspect that's because any change from the intakes is being drowned out by the sound from my Stillen exhaust / Berk HFCs.

Yeah there's definitely a sound difference. I can hear them even at low RPMS actually.

Quote:

Originally Posted by MightyBobo

RCZ is running just stock exhaust, is he not?

Completely stock exhaust.

Quote:

Originally Posted by Black kNight

thanks RCZ woo big increase in hp

ok i have Question
If some water got inside the intake due to the place where they are . Is it going to effect the car i mean like while driving in the rain

Again, minor point that doesn't deserve any more discussion. Guys the ONLY time water will cause problems with intakes is if you are revving it when the intakes are under water. Otherwise stop worrying about the water.

Quote:

Originally Posted by Namir

RCZ, Great write up and impressive results.
But I must say, these results were somewhat confounding based on your earlier dynos. You said that when you dyno'd with no filters, you saw no gains. Suggesting that air flow through the filter was not a limiting factor. Now however, you see 15-20HP gains with the long tubes. If the filters truly make no difference in HP gains, then we are led to believe that 20HP gains are to be made by rerouting the air to the throttle body through these tubes rather than the stock airboxes? Is the stock airbox design that poor/restrictive?

Promising gains regardless of where they came from. I don't care if its some STILLEN black magic trick. This is a significant step toward the 300HP N/A mark.

There's a few factors that lead to this. First of all, the corrugated section is gone. Second the bends on the intake are smoother and therefore better flow. Third the intakes themselves have a lot of surface area, more so than open stock intakes. 4th the diameter of the piping may have changed a little, tricking the MAF into thinking the AFR is richer than it actually is. Usually when you tune for these things in cars that need bigger intakes you do something called scaling, where you adjust for the bigger piping. Without tuning, the intake may be helping the car run slightly leaner (NOT DANGEROUS, don't jump to conclusions already, this isnt going to blow up your motor) which would be idea for making some safe hp. 5th, the placement allows it to draw colder air. 6th STILLEN designed this intake to work, that means lots of R&D on the design to make it flow and perform as well as possible with the motor.

RCZ · 03-28-2009, 08:41 PM

Quote:

Originally Posted by sylenze

i agree with josh with the water issue... as added note, if you decide to install the scoops you can also place it somewhat indirectly from the intake filters to have more confidence that it would not get water damage or get extremely soaked...

however, after rethinking about the location of the filter in relation to the front fascia/bumper and chassis/foam, imo it will actually suck air from underneath the car or the air coming off the asphalt that is bouncing off the radiator... i cant find anywhere other paths the cold air can come in at...as such, i am thinking that if it is hot outside/at the track, this CAI will actually not be sucking cold air in... which kind of goes against what josh is saying and gives more reason to get the scoops...

my problem with this is that i dont like the scoops... so i think if stillen is in development of a front fascia body kit for the z... i think they should put in consideration to establishing better in flow coming from the top of the car/bumper... with that, i believe the 15-20hp gains will be easier to foresee... ( OORRRR ... just take out the foam that is blocking the air... but am no mechanic/engineer, which means i am not quite sure what the impact would be to the car)...

... all this thoughts will probably be answered after SEMTEX's dyno results... -Semtex, just in case my thoughts hold water... i think you should bring your shotgun and use it to put holes on your bumper and re-dyno the car...

There are only so many places you can put these. After looking at the other possible options, it is clear that STILLEN put these in the best possible place.
Remember we also have to install an oil cooler in there and there isnt much room anywhere else. We were pretty impressed with fitment actually, the intakes fit perfectly in that spot and dont need any type of supports. If I had to design the intakes again, I wouldn't change a thing. I may add some gold or plain reflexive foil or a thermo-tec sleeve to the pipes because I dont care as much for how they look, but rather how they perform. This is what Im talking about...

Quote:

Originally Posted by semtex

I believe that styrofoam block is actually part of the crash structure. Like it's there to absorb energy in the event of a collision, so taking it out probably isn't a good idea. As for the shotgun, I'll give it some serious consideration.

Leave the structural components alone while you can.

Quote:

Originally Posted by Asheth

Hmm have a couple questions.

1) After install would be recommended to reset the ECU?

2) Is a tune necessary or beneficial after this mod i.e. will you see even more gains after a tune?

1) No, just drive a bit and it will adjust real-time

2) Necessary, no. Beneficial, always.

sylenze · 03-29-2009, 02:20 PM

great point RCZ on the topic of placement of the intakes... you and Stillen got that exactly right, there isnt anywhere else to better place them... my question was do we need to do anything else to also help the intake suck in more cold air to get the optimal performance... i am already sold with those intakes.. i just think the bumper restricts the cold air inflow... which might not be even a valid concern after we see semtex's dyno results...

btw since nobody wants me to take out those damn foams...maybe i can drive with out the bumper instead... i think that's the next best alternative besides driving around with shotgun holes on the bumper... jk ...

RCZ · 03-29-2009, 03:31 PM

Look at it this way, the air temperature inside and outside the bumper is probably marginally different. Not enough to make real difference. It is actually a good thing that they are protected from rushing air. Think about it; have you ever tried breathing with your head out the window at 80MPH+? You would think that with all that air rushing into your face, you would be able to breathe more easily, but it actually becomes harder because of all the turbulence. The same thing would occur if you put the intakes to direct air flow. The turbulence at higher speeds would actually be detrimental to performance. If you want to do something with the bumper to get more air in there, you would be best off by adding venturis that route directly into the intakes. Notice in this picture, to the right of the drivers head.

I don't know if this is something you should worry about though...

If you really want to do something about it then do this...On the bumper cover, the fang splitters have openings which come blocked off, but can be removed. You could take tubing and route air from there, up to where the intakes are.

I for one, am using those splitter inlets to either get air to the brakes or oil cooler. I am not worried about the intakes...

RCZ · 03-29-2009, 04:26 PM

Apparently theres something out there called Aero-Lite Heat Reflective Tape that is cheap and 96% reflective. It is not gold, but will work just as well.

I will look into this... should be able to get the job done for about $50...for those who are anal about heat and heat soak like me. Earlsindy.com sells it.

WShade · 03-29-2009, 05:19 PM

Quote:

Originally Posted by RCZ

Apparently theres something out there called Aero-Lite Heat Reflective Tape that is cheap and 96% reflective. It is not gold, but will work just as well.

I will look into this... should be able to get the job done for about $50...for those who are anal about heat and heat soak like me. Earlsindy.com sells it.

Sounds like a good idea. Being a soon to be ex-turbo guy as well, I hear you on being heat soak crazy.

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03-28-2009, 07:26 PM	#53 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	I'll post again when I get home, but fyi the easiest way to reset an ecu on any car is to disconnect the battery and pump the brakes. that's it, there is no magic. that discharges the system and then just reconnect battery and ur done. I've done it many times on many cars.

03-28-2009, 08:04 PM	#54 (permalink)
Neo187H Enthusiast Member Join Date: Jan 2009 Location: Albany, NY Posts: 302 Drives: PW 370Z Rep Power: 16	Resetting the ECU is totally unneeded for installing intakes or exhaust, drive the car for 20 miles with the new modifications installed and the ECU will adapt to it if it requires adaptations at all.

03-29-2009, 02:20 PM	#57 (permalink)
sylenze Base Member Join Date: Mar 2009 Location: So Cal/SB county Posts: 222 Drives: 370z 6mt+SP PG Rep Power: 16	great point RCZ on the topic of placement of the intakes... you and Stillen got that exactly right, there isnt anywhere else to better place them... my question was do we need to do anything else to also help the intake suck in more cold air to get the optimal performance... i am already sold with those intakes.. i just think the bumper restricts the cold air inflow... which might not be even a valid concern after we see semtex's dyno results... btw since nobody wants me to take out those damn foams...maybe i can drive with out the bumper instead... i think that's the next best alternative besides driving around with shotgun holes on the bumper... jk ...

03-29-2009, 03:31 PM	#58 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	Look at it this way, the air temperature inside and outside the bumper is probably marginally different. Not enough to make real difference. It is actually a good thing that they are protected from rushing air. Think about it; have you ever tried breathing with your head out the window at 80MPH+? You would think that with all that air rushing into your face, you would be able to breathe more easily, but it actually becomes harder because of all the turbulence. The same thing would occur if you put the intakes to direct air flow. The turbulence at higher speeds would actually be detrimental to performance. If you want to do something with the bumper to get more air in there, you would be best off by adding venturis that route directly into the intakes. Notice in this picture, to the right of the drivers head. I don't know if this is something you should worry about though... If you really want to do something about it then do this...On the bumper cover, the fang splitters have openings which come blocked off, but can be removed. You could take tubing and route air from there, up to where the intakes are. I for one, am using those splitter inlets to either get air to the brakes or oil cooler. I am not worried about the intakes...

03-29-2009, 04:26 PM	#59 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	Apparently theres something out there called Aero-Lite Heat Reflective Tape that is cheap and 96% reflective. It is not gold, but will work just as well. I will look into this... should be able to get the job done for about $50...for those who are anal about heat and heat soak like me. Earlsindy.com sells it.