Cold Air Intake HP Debate - Is it worth it ?

Nitex · 04-01-2011, 04:01 PM

Yeah sorry... you wont be convincing me that your drop ins and maf tubes equal the gen3 HP gains.. Just isnt happening. Call me ignorant, cause often i am!

Jordo! · 04-02-2011, 05:00 AM

Quote:

Originally Posted by Nitex

Yeah sorry... you wont be convincing me that your drop ins and maf tubes equal the gen3 HP gains.. Just isnt happening. Call me ignorant, cause often i am!

According to the available dyno data, the G3's make about 1.5% more whp on the average (i.e., about 4-5 whp on a dynojet) than the OEM airbox plus high flow panel filters plus smooth intake tubes.

My guess is that the small difference is due in part to the marginally better flow dynamics of cone filters; the rest may simply be due to leaning out the mixture via a small, but stable, misread on the MAF sensors, for example due to a variation in the diameter or orientation of the piping.

With tuning, the difference between them should be even less if that's the case, as you would simply set the mixture where you want it on both types of set-ups, rather than relying on mechancially induced effects.

Explain to me your theory of why the G3 should be vastly superior.

Nitex · 04-03-2011, 01:18 PM

Intake placement should take full advantage of cold air INTAKE. In real world situations "not dyno fans" you should see colder intake temps with the placement of the gen3s. If someone can prove me wrong then so be it.

Quote:

Originally Posted by Jordo!

According to the available dyno data, the G3's make about 1.5% more whp on the average (i.e., about 4-5 whp on a dynojet) than the OEM airbox plus high flow panel filters plus smooth intake tubes.

My guess is that the small difference is due in part to the marginally better flow dynamics of cone filters; the rest may simply be due to leaning out the mixture via a small, but stable, misread on the MAF sensors, for example due to a variation in the diameter or orientation of the piping.

With tuning, the difference between them should be even less if that's the case, as you would simply set the mixture where you want it on both types of set-ups, rather than relying on mechancially induced effects.

Explain to me your theory of why the G3 should be vastly superior.

Jordo! · 04-03-2011, 01:21 PM

Quote:

Originally Posted by Nitex

Intake placement should take full advantage of cold air INTAKE. In real world situations "not dyno fans" you should see colder intake temps with the placement of the gen3s. If someone can prove me wrong then so be it.

The OEM airboxes duct air from exactly the same place as the G3's...

A unducted/shielded SRI will perform more poorly than both.

Nitex · 04-03-2011, 01:23 PM

Interesting, my filters are pulling air from in front of my bumper core suport, completely outside the engine. Factory boxes are inside the core support/ partially inside the engine bay?

Anarky · 04-03-2011, 01:54 PM

I'm no expert on this but I have to agree with Nitex

Cmike2780 · 04-03-2011, 02:30 PM

Quote:

Originally Posted by Nitex

Interesting, my filters are pulling air from in front of my bumper core suport, completely outside the engine. Factory boxes are inside the core support/ partially inside the engine bay?

The boxes are in the engine bay, but I think the air is drawn from the same area. Hp wise, both mod gains are hardly impressive on their own. I think it's a matter of personal preference.

Jordo! · 04-03-2011, 09:10 PM

Quote:

Originally Posted by Nitex

Interesting, my filters are pulling air from in front of my bumper core suport, completely outside the engine. Factory boxes are inside the core support/ partially inside the engine bay?

They have ducts that pull air from in front of the radiator. The location of the filter itself is irrelevant.

If the ducts weren't there (as they aren't for a SRI) you would be right.

As to the airbox being under the hood, the pipes are under your hood too... the air will warm up once it is in there...

Actually, metal pipes will heat it up more than plastic -- considered that?

In any case, the difference appears to be less than 5 whp on the average.

04-01-2011, 04:01 PM	#1 (permalink)
Nitex Track Member Join Date: Jan 2010 Location: Seattle Posts: 848 Drives: '13 GTI Stage 2 UNI Rep Power: 17	Yeah sorry... you wont be convincing me that your drop ins and maf tubes equal the gen3 HP gains.. Just isnt happening. Call me ignorant, cause often i am! __________________ 2013 Drivers ED GTI \| Stage 2 Unitronic

04-03-2011, 01:23 PM	#5 (permalink)
Nitex Track Member Join Date: Jan 2010 Location: Seattle Posts: 848 Drives: '13 GTI Stage 2 UNI Rep Power: 17	Interesting, my filters are pulling air from in front of my bumper core suport, completely outside the engine. Factory boxes are inside the core support/ partially inside the engine bay? __________________ 2013 Drivers ED GTI \| Stage 2 Unitronic

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04-03-2011, 01:54 PM	#6 (permalink)
Anarky Base Member Join Date: Aug 2010 Location: Salt Lake City Posts: 118 Drives: 2011 370Z MB M6 Rep Power: 15	I'm no expert on this but I have to agree with Nitex