370Z K&N Dual Air Filter

Robert_Nash · 06-18-2009, 04:50 PM

Quote:

Originally Posted by dawankler

....And Robert, in rereading your earlier posts you DID say you didn't think it'd provide appreciable performance gains unless they were in tandem with FI or extreme modifications. I guess it just depends on your price/performance ratios, but there's been a number of posters here with proven gains (10% isn't uncommon so far) by just upgrading the airflow.

Well, I likely didn't express it well but what I was trying to convey is that an engine, in otherwise stock form; doesn't really need additional air flow and/or isnt' really going to benefit from it. By extension, then, if you start opening up the exhaust side of the equation then more air flow in would likely be a good thing!

semtex · 06-18-2009, 06:20 PM

Mine was done with the nose on, just for the record.

+14.7whp on Forged's Dyno Dynamics.

tstrick9 · 06-19-2009, 06:44 AM

Is there a wideband showing a/f ratio for these stillen graphs? It could be leaning it out like modshack said. I know from experience that the s/c Cobras can get very lean with the addition of a cai, and in some instances require a retune to be safe.

semtex · 06-19-2009, 08:03 AM

Quote:

Originally Posted by tstrick9

Is there a wideband showing a/f ratio for these stillen graphs? It could be leaning it out like modshack said. I know from experience that the s/c Cobras can get very lean with the addition of a cai, and in some instances require a retune to be safe.

Stillen Headers installed - Review/Pics/Vid/Dyno

The second dyno graph shows A/F.

Zsteve · 10-04-2009, 06:52 PM

Modshack, since you do alot of intakes and have had your bumber off to do your diy intake air duct thing, would doing your diy mod and drop ins be just about as benificial as an aftermarket cai?

Modshack · 10-04-2009, 08:36 PM

Quote:

Originally Posted by Zsteve

Modshack, since you do alot of intakes and have had your bumber off to do your diy intake air duct thing, would doing your diy mod and drop ins be just about as benificial as an aftermarket cai?

Fang vents to the stock box should work fine...Drop ins are of minimal value though..

Zsteve · 10-19-2009, 09:01 PM

so what were the results? You can tell us then post the sheets later.

Zsteve · 10-19-2009, 09:13 PM

looks about right to me, a few hp gains here and there and I didnt see any loses and Im sure better throttle response too. So what I would expect from drop ins, which is what Im doing. Have them on order already.

Philipp · 10-19-2009, 09:20 PM

Quote:

Originally Posted by Zsteve

looks about right to me, a few hp gains here and there and I didnt see any loses and Im sure better throttle response too. So what I would expect from drop ins, which is what Im doing. Have them on order already.

That what exactly my goal... for 68can$x2 (including installation!!!). In US $ this is around 100$ and has no affect/questions from my dealer...

Blown32 · 10-20-2009, 10:56 AM

Quote:

Originally Posted by Philipp

That what exactly my goal... for 68can$x2 (including installation!!!). In US $ this is around 100$ and has no affect/questions from my dealer...

When you say "drop ins" are you talking just K&N filters to replace the OEM Nissan filters in the stock cans?

Philipp · 10-20-2009, 11:23 AM

Quote:

Originally Posted by Blown32

When you say "drop ins" are you talking just K&N filters to replace the OEM Nissan filters in the stock cans?

That's what i mean

Blown32 · 10-20-2009, 04:22 PM

Quote:

Originally Posted by Philipp

That's what i mean

Appreciate the tip man.Thanks!

nogoodname · 10-19-2009, 09:29 PM

not bad gains considering it was air filters....
i think it turned out well !!

oh, and here

Josh@STILLEN · 10-19-2009, 09:50 PM

K&N got hit with some bad internet stigma of "i know a guy, and his MAFs got messed up", and unfortunately that has plagued them.

They have an entire department set up to try and fail MAFs with oil, and have even gone so far as to have staff on hand to help with dealership issues if there is in fact a claim of the K&N's causing an issue..

.. none to date

K&N Consumer Protection Pledge

There's a ton of info here.. including testing

Philipp · 10-19-2009, 10:11 PM

Quote:

Originally Posted by Josh@STILLEN

K&N got hit with some bad internet stigma of "i know a guy, and his MAFs got messed up", and unfortunately that has plagued them.

They have an entire department set up to try and fail MAFs with oil, and have even gone so far as to have staff on hand to help with dealership issues if there is in fact a claim of the K&N's causing an issue..

.. none to date

K&N Consumer Protection Pledge

There's a ton of info here.. including testing

Josh
Very interesting indeed. Thx for the info.

06-18-2009, 06:20 PM	#2 (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: 33	Mine was done with the nose on, just for the record. +14.7whp on Forged's Dyno Dynamics. __________________ "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.

10-19-2009, 09:01 PM	#7 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	so what were the results? You can tell us then post the sheets later. __________________ 2010 LS3 C6 Silver coupe corvette

10-19-2009, 09:13 PM	#8 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	looks about right to me, a few hp gains here and there and I didnt see any loses and Im sure better throttle response too. So what I would expect from drop ins, which is what Im doing. Have them on order already. __________________ 2010 LS3 C6 Silver coupe corvette

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06-19-2009, 06:44 AM	#3 (permalink)
tstrick9 Base Member Join Date: Jun 2009 Location: north carolina Posts: 45 Drives: 2003 cobra, 2006 tb Rep Power: 16	Is there a wideband showing a/f ratio for these stillen graphs? It could be leaning it out like modshack said. I know from experience that the s/c Cobras can get very lean with the addition of a cai, and in some instances require a retune to be safe.

10-04-2009, 06:52 PM	#5 (permalink)
Zsteve A True Z Fanatic Join Date: Sep 2009 Location: TX Posts: 3,298 Drives: the 2 balled club Rep Power: 22	Modshack, since you do alot of intakes and have had your bumber off to do your diy intake air duct thing, would doing your diy mod and drop ins be just about as benificial as an aftermarket cai?

10-19-2009, 09:29 PM	#13 (permalink)
nogoodname Lifetime Premium Join Date: Nov 2008 Location: Montreal Posts: 22,357 Drives: E46 M3 Rep Power: 1765	not bad gains considering it was air filters.... i think it turned out well !! oh, and here

10-19-2009, 09:50 PM	#14 (permalink)
Josh@STILLEN The370Z.com Sponsor Join Date: Dec 2008 Location: Costa Mesa, CA Posts: 1,197 Drives: 2004 G35 Coupe 6MT Rep Power: 534	K&N got hit with some bad internet stigma of "i know a guy, and his MAFs got messed up", and unfortunately that has plagued them. They have an entire department set up to try and fail MAFs with oil, and have even gone so far as to have staff on hand to help with dealership issues if there is in fact a claim of the K&N's causing an issue.. .. none to date K&N Consumer Protection Pledge There's a ton of info here.. including testing