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#1
04-10-2012, 01:45 PM
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Stock intake vs. Cold Air and hood scoop
I was thinking of improving air flow to my car and I was wondering the pros and cons of each and what would give the most horsepower?
Few thoughts I had How much of a difference would I see from the scoop vs. Cold Air cone? Best option for gas mileage? 
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#2
04-10-2012, 02:38 PM
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Re: Stock intake vs. Cold Air and hood scoop
Your best option for horsepower and mileage is stock. The factory set-up flows very well and sucks in cold air from the inner fender area. A cone filter will suck in hot air from the engine bay. A scoop would make little or no difference and introduces the possibility of sucking in water with possible catastrophic consequences.
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#3
04-10-2012, 03:06 PM
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Re: Stock intake vs. Cold Air and hood scoop
The only intake with proven gains has been the dual-track one that YT and Myxalplyx put together, but that was with a set of aftermarket cams, not a stock engine. The parts of the stock intake that flow poorly are the accordian style pipe and the funky airbox that feeds the throttle body. Smoothing those features out is where you may see gains, not with changes to the filter.
It's been established that the "ram air" intakes are next to useless. Off the line you have no airflow to give you "boost", and at high speed you won't feel the difference that a half PSI or so will give you.
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Chris 92 Ebony Mica LS-L "A Rolling Restoration": 223,250 KM - Sleeping 2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos 2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold 2020 Ram 1500 Longhorn - Red Pearl
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#4
04-10-2012, 03:14 PM
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Re: Stock intake vs. Cold Air and hood scoop
Having added a full ram air system to my first SVX back in 2001,
before I evan drove her home   and having drag raced with and without ram air on the same SVX the same day, I have to agree with Blacky and Chris.
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www.svxfiles.com The first SuperCharged SVX,  the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link
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#6
04-10-2012, 03:51 PM
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Re: Stock intake vs. Cold Air and hood scoop
You'd see an increase in how much water and road debris your engine injests, but otherwise not much. Realistically without significant mods you won't get any measurable improvement in performance. Generally the "cold air intake"/cone filter setup gives people the impression their car is faster because it makes more noise.
__________________
Chris 92 Ebony Mica LS-L "A Rolling Restoration": 223,250 KM - Sleeping 2007 STi 6MT, Stance GR+ coilovers, PWR Rad, JDM hood badge, svxfiles 6000K HIDs, JDM Clear Corners, $15/15 min mod, $20/20 min mod, Energy Swaybar Bushings, Hella Supertones horns, Gold STi BBS rims, Group A lightweight crank pulley, A/C system removed, Custom header-back exhaust, Hybrid carbon/metal rear sway bar, restored headlights with CCFL halos 2008 Subaru Legacy Spec B - Diamond Grey Metallic - Sold 2020 Ram 1500 Longhorn - Red Pearl
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#8
04-10-2012, 05:18 PM
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Re: Stock intake vs. Cold Air and hood scoop
Quote:
Quote:
Does cooler air help? yes but perhaps not enough to justify it.
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#9
04-10-2012, 05:21 PM
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Re: Stock intake vs. Cold Air and hood scoop
Quote:
If you change it for a more agressive sound, or a sportier sound, or to look cool, or just because you can, then GREAT! Its YOUR car! Make it your own! Tom not a stock one in the bunch. 
__________________
www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link
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#11
04-10-2012, 05:55 PM
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Re: Stock intake vs. Cold Air and hood scoop
Quote:
For fuel economy, flow is really the least of your worries - at least through the engine.
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Disclaimer: The above post is on the internet.
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#12
04-10-2012, 06:03 PM
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Re: Stock intake vs. Cold Air and hood scoop
92SVX I really like what you did with the intake manifold. Is that painted/powdercoated or something else fancy?
Maybe someday I'll be able to provide insight into stock intake vs 'cold air'....someday...maybe... until such a time.. sti panel filter in place of stock filter may be good for a smidge more airflow.
__________________
94 Emerald LS w/ awd 4.44 swap 199xxx daily driver Stage 2 ECUTune chip, 370cc injectors, ECUTune valve body and TCU, solid rubber motor mounts from a forester, outlaw phenolic spacers, COBBTuning lightweight blue crank pulley, Bontragerworks 22mm rear sway bar & endlinks, StrongFlex poly front sway bar bushings, Powergrid adjustable front sway bar endlinks, 17" MOMO CORSE RPM wheels w/ Toyo Proxes4 225/45, drilled/slotted rotors f/r, stainless lines, ceramic pads, Blue silicone radiator hoses, power mode switch, gold jdm hood badge, 20% tint all around, Hella optilux xtreme yellow fog bulbs parts waiting to go on car: the rest of the strongflex polyurethane suspension bushing set
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#13
04-10-2012, 09:47 PM
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Re: Stock intake vs. Cold Air and hood scoop
Quote:
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#15
04-11-2012, 02:36 AM
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Quote:
__________________
"That which can be asserted without evidence can be dismissed without evidence." '92 Dark Teal SVX LS-L, >146,000m 3 pedals, 5 speeds., restoration underway. 2012 Honda Insight, slow but cute.
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