K&N Drop-In Filters

speedracer007 · 10-22-2012, 09:46 AM

I see them for around $45 bucks each on Amazon. There are a couple of negative reviews from G37 owners. Any 370Z owners with negative experiences?

kenny's 370z · 10-22-2012, 10:01 AM

i didnt like them.the oem pillows seemed to have more flow on my 09.i finally did a shop vac test where you stick the pipe from a real shop vac to one side of the filter and see how far away you can get, or how closer rather,before it will pick up a piece of card board.oem filters won.car just seemed to run better with the oem filters.thats my experience.i believe the k&n filters block more flow resulting in a slower flow to the maf and therefore making more power.imo of course.

Cmike2780 · 10-22-2012, 10:06 AM

Quote:

Originally Posted by speedracer007

I see them for around $45 bucks each on Amazon. There are a couple of negative reviews from G37 owners. Any 370Z owners with negative experiences?

I've had them for almost 2 years now, no problems as long as you maintain them properly. You're going to find something negative about every product if you look hard enough. The problem with these is that people don't re-oil them properly or damage the filter somehow.

Quote:

Originally Posted by kenny's 370z

i didnt like them.the oem pillows seemed to have more flow on my 09.i finally did a shop vac test where you stick the pipe from a real shop vac to one side of the filter and see how far away you can get, or how closer rather,before it will pick up a piece of card board.oem filters won.car just seemed to run better with the oem filters.thats my experience.i believe the k&n filters block more flow resulting in a slower flow to the maf and therefore making more power.imo of course.

That's not very scientific, and if there is less flow with the K&N, there would be less power. It's proven on the Dyno, not a makeshift shop vac test, which you're not suppose to do by the way since it could damage the filter element.

kenny's 370z · 10-22-2012, 10:33 AM

less flow over the maf results in more power via less fuel being dumped resulting in a more lean condition is it not ?

Cmike2780 · 10-22-2012, 11:24 AM

Quote:

Originally Posted by kenny's 370z

less flow over the maf results in more power via less fuel being dumped resulting in a more lean condition is it not ?

Less fuel & less air equals less power. Lean/rich conditions vary depending on the tune parameters and is adjusted via the MAF readings. If there's less air flow, then there's less power...more airflow, more power. The A/F ratio is not something static in electronic fuel injector engines since it can vary the amount of fuel. This is basically why people eventually need a tune. It gets pushed beyond the stock map when they add bolt ons that increase intake and exhaust flow.

With a turbo for example, you're pushing more air and in and the ECU will tell the injectors to dump more fuel.

kenny's 370z · 10-22-2012, 11:40 AM

then might as well trash all of the aftermarket intakes lol.especially the ones with bigger pipe tubing slowing down the air flow.

edit;regardless,im not here to argue.you're happy with your setup and im happy with mine.

Cmike2780 · 10-22-2012, 12:24 PM

Quote:

Originally Posted by kenny's 370z

then might as well trash all of the aftermarket intakes lol.especially the ones with bigger pipe tubing slowing down the air flow.

edit;regardless,im not here to argue.you're happy with your setup and im happy with mine.

Apparently you've never heard of a turbo or supercharger then, lol. They're basically forcing MORE air into the engine.

Weren't you the guy that hacked the hell out of the stock intake box for your own "cold air intake" lol. Where are your dyno results btw?

10-22-2012, 11:40 AM	#6 (permalink)
kenny's 370z Base Member Join Date: Jun 2012 Location: TN Age: 60 Posts: 243 Drives: 2012 frontier sv v6 Rep Power: 15	then might as well trash all of the aftermarket intakes lol.especially the ones with bigger pipe tubing slowing down the air flow. edit;regardless,im not here to argue.you're happy with your setup and im happy with mine. Last edited by kenny's 370z; 10-22-2012 at 11:48 AM.

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10-22-2012, 09:46 AM	#1 (permalink)
speedracer007 Base Member Join Date: Oct 2012 Location: Huntsville, Alabama Posts: 119 Drives: 2013 Nissan 370Z Rep Power: 14	I see them for around $45 bucks each on Amazon. There are a couple of negative reviews from G37 owners. Any 370Z owners with negative experiences?

10-22-2012, 10:01 AM	#2 (permalink)
kenny's 370z Base Member Join Date: Jun 2012 Location: TN Age: 60 Posts: 243 Drives: 2012 frontier sv v6 Rep Power: 15	i didnt like them.the oem pillows seemed to have more flow on my 09.i finally did a shop vac test where you stick the pipe from a real shop vac to one side of the filter and see how far away you can get, or how closer rather,before it will pick up a piece of card board.oem filters won.car just seemed to run better with the oem filters.thats my experience.i believe the k&n filters block more flow resulting in a slower flow to the maf and therefore making more power.imo of course.

10-22-2012, 10:33 AM	#4 (permalink)
kenny's 370z Base Member Join Date: Jun 2012 Location: TN Age: 60 Posts: 243 Drives: 2012 frontier sv v6 Rep Power: 15	less flow over the maf results in more power via less fuel being dumped resulting in a more lean condition is it not ?