STILLEN Longtube G3 Intakes. Review, Dyno and Impressions.

Josh@STILLEN · 03-28-2009, 01:11 PM

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

These have been proven to be fine on the G37, which is even more open being the grille is in front of the filters.

semtex · 03-28-2009, 01:19 PM

Quote:

Originally Posted by MightyBobo

Agreed. The Stillen exhaust is what I have my eyes on myself, so i'll be VERY interested in seeing your results. Will you be using a Mustang dyno, also?

I'm using Dyno Dynamics (known as the 'heartbreaker dyno'). It reads slightly lower than Mustang, even. From the information I've been able to find just by researching on the net, if you take a Dyno Dynamics reading and multiply it by 1.18, that gives you an approximate equivalent DynoJet number. Mustang Dynos read lower than DynoJet, but higher than Dyno Dynamics, and have a DD multiplier of 1.115. So if you wanted to convert my current DD reading of 291.7 whp to an approximate Mustang equivalent, multiply by 1.115 for a reading of 325.25. Conversely, if you want to convert RCZ's current Mustang reading of 278 whp to a DD equivalent, multiply it by 0.9 for a reading of 250.2. Note that all these calculations are approximate because the conversion factors are non-linear (i.e., they change as you go up and down the HP scale). Personally, I find the 250.2 number suspect, as we ran bullitt5897's bone stock 370Z on the same DD dyno that we ran mine on, and his car came in with 256 whp. I find it inconceivable that RCZ's car would pull less whp on that same dyno when he has the G3 intakes. I think this all just goes to show what an inexact science this can be when comparing different cars on different dynos, so we would be well advised to take this all with a grain of salt.

There's more info in this thread if you're interested -> http://www.the370z.com/vq37vhr/2199-...alculator.html

dad · 03-28-2009, 01:30 PM

Quote:

Originally Posted by Josh@STILLEN

These have been proven to be fine on the G37, which is even more open being the grille is in front of the filters.

How about when you wash the car?

The Weapon · 03-28-2009, 01:55 PM

I want.. Is there going to be a group buy for this?

GVick87 · 03-28-2009, 02:08 PM

Quote:

Originally Posted by dad

How about when you wash the car?

Or when combined with Mines Intake Air Scoop Type II?
Mines - Intake Air Scoop Type II Set, Dry Carbon

Namir · 03-28-2009, 02:10 PM

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.

Josh@STILLEN · 03-28-2009, 02:12 PM

Quote:

Originally Posted by dad

How about when you wash the car?

Quote:

Originally Posted by GVick87

Or when combined with Mines Intake Air Scoop Type II?
Mines - Intake Air Scoop Type II Set, Dry Carbon

No problems when washing the car.. and the Mine's scoops would be roughly the same open area as the G37 grille, if not less.

Water becomes an issue when you're submerging the filter, and revving the engine.. if you submerge the filters at the level they are and gun it, you're trying to drive through a river.. and that's not going to work on many levels.

Also the filter location being where it is versus down near the road also helps maximize the cool air pickup.. air coming off asphalt in any sort of warm weather can really effect the intake air charge..

GVick87 · 03-28-2009, 02:24 PM

Quote:

Originally Posted by Josh@STILLEN

No problems when washing the car.. and the Mine's scoops would be roughly the same open area as the G37 grille, if not less.

Water becomes an issue when you're submerging the filter, and revving the engine.. if you submerge the filters at the level they are and gun it, you're trying to drive through a river.. and that's not going to work on many levels.

Also the filter location being where it is versus down near the road also helps maximize the cool air pickup.. air coming off asphalt in any sort of warm weather can really effect the intake air charge..

Thanks for the reply! Makes sense!

MightyBobo · 03-28-2009, 02:50 PM

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.

The stock filters probably arent BAD...its their location, and the fact that a lot of engine bay heat can easily be brought in. Moving them outside of the engine bay is probably a fairly large improvement.

nogoodname · 03-28-2009, 02:55 PM

Knight,
the Intakes on the Z seem to be covered up in the front by the bumper and the metal bar plus foam.
on the G37, it's right in front of the grille and ppl drove it in the rain, nothing bad happened. Just dont floor it while it's raining heavily. there was only a little piece of plastic protecting the filters. if the G survived, i;m sure the Z can manage as well or even better.

sylenze · 03-28-2009, 03:24 PM

Quote:

Originally Posted by Josh@STILLEN

No problems when washing the car.. and the Mine's scoops would be roughly the same open area as the G37 grille, if not less.

Water becomes an issue when you're submerging the filter, and revving the engine.. if you submerge the filters at the level they are and gun it, you're trying to drive through a river.. and that's not going to work on many levels.

Also the filter location being where it is versus down near the road also helps maximize the cool air pickup.. air coming off asphalt in any sort of warm weather can really effect the intake air charge..

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...

SoCal 370Z · 03-28-2009, 03:37 PM

Quote:

Originally Posted by sylenze

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...

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.

semtex · 03-28-2009, 03:38 PM

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.

Nikon FM · 03-28-2009, 03:40 PM

Nice Posting and information/pictures for the intakes.

I'm sold. Good stuff

Asheth · 03-28-2009, 03:46 PM

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?

03-28-2009, 02:10 PM	#36 (permalink)
Namir Track Member Join Date: Nov 2008 Location: OH and VA Posts: 627 Drives: 09 G37S 6MT Rep Power: 256	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. __________________ Ambition is the path to success. Persistence is the vehicle you arrive in. G37S\|6MT\|PREM\|NAV\|Eibach\|Ichibia\|Injen

03-28-2009, 03:38 PM	#43 (permalink)
semtex A True Z Fanatic Join Date: Jan 2009 Location: Behind enemy lines Age: 54 Posts: 5,995 Drives: People to drink Rep Power: 32	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. __________________ "There are no small accidents on this circuit." -- Ayrton Senna 316.8whp & 248 ft/lbs (Dyno Dynamics) \| 319whp & 256 ft/lbs (DynoJet) (04/23/10) Stillen G3 CAI, CBE, Pulley / F.I. LTH / GTSpec Ladder Brace / Setrab Oil Cooler / UpRev-tuned by Forged Perf.

03-28-2009, 03:40 PM	#44 (permalink)
Nikon FM Track Member Join Date: Jan 2009 Location: Snoqualmie WA Posts: 973 Drives: 03 996TT Porsche Rep Power: 606	Big Thank You! RCZ Nice Posting and information/pictures for the intakes. I'm sold. Good stuff __________________ Buddy Revell: "One man's sooner is another man's later"

03-28-2009, 03:46 PM	#45 (permalink)
Asheth Track Member Join Date: Dec 2008 Location: Glen Burnie, Maryland Posts: 917 Drives: 09 Blk 6mt Rep Power: 17	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? __________________ 180 customs Headlights - Yantech Backup Camera - Projekt 1 - Stillen Gen 3- EVO-R V2 Foglight, EVO-R CF Diffuser, Carbon Fiber Element Steering wheel - Fast Intentions TDX/RHFC's - RJM A.F.P. - Z1 Oil Cooler - 2015 Nismo Conversion.

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03-28-2009, 01:55 PM	#34 (permalink)
The Weapon Enthusiast Member Join Date: Nov 2008 Location: Tucson, AZ Posts: 286 Drives: 370Z Tour/Sport Blk Rep Power: 3372	I want.. Is there going to be a group buy for this?

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nogoodname Lifetime Premium Join Date: Nov 2008 Location: Montreal Posts: 22,357 Drives: E46 M3 Rep Power: 1765	Knight, the Intakes on the Z seem to be covered up in the front by the bumper and the metal bar plus foam. on the G37, it's right in front of the grille and ppl drove it in the rain, nothing bad happened. Just dont floor it while it's raining heavily. there was only a little piece of plastic protecting the filters. if the G survived, i;m sure the Z can manage as well or even better.