Make it go faster

[GGrey]

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Not always true. A turboback exhaust will do wonders, but intakes don't typically do much for FI cars.

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I have to disagree regarding intakes. Most stock air intake boxes are overly restrictive. Installing a lager than stock open-style filter and eliminating the box will increase power and fuel mileage in almost any vehicle. More air to the engine = more power. In addition, more air to the turbo generally means more boost (and cooler boost), which means more power.

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You may be oversimplifying a few things.

Where is the MAFS located? Is the piping of the new intake a bigger diameter than stock? If the MAFS mount is completely replaced by the aftermarket, larger diameter piping, the ECU will adjust to skewed readings and run lean. Lean = Hotter = Dangerous to the engine + Decreased output.

Granted this can be corrected with engine management, but will require custom tuning, and some decent $$$$.

[JRussell]

[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
Not always true. A turboback exhaust will do wonders, but intakes don't typically do much for FI cars.

[/ QUOTE ]

I have to disagree regarding intakes. Most stock air intake boxes are overly restrictive. Installing a lager than stock open-style filter and eliminating the box will increase power and fuel mileage in almost any vehicle. More air to the engine = more power. In addition, more air to the turbo generally means more boost (and cooler boost), which means more power.

[/ QUOTE ]

You may be oversimplifying a few things.

Where is the MAFS located? Is the piping of the new intake a bigger diameter than stock? If the MAFS mount is completely replaced by the aftermarket, larger diameter piping, the ECU will adjust to skewed readings and run lean. Lean = Hotter = Dangerous to the engine + Decreased output.

Granted this can be corrected with engine management, but will require custom tuning, and some decent $$$$.

[/ QUOTE ]

The stock MAF sensor is normally still used with aftermarket intake kits. The sensors just adjust to the very slight increase in air flow, so the engine running lean is not an issue. Most engines will not even run (or run VERY poorly) if the MAF sensor is removed.

The key to increasing power here is replacing the stock restrictive air filter box with an open-style filter. This is where most of the power gains come from. No harm can be done to your engine by running an aftermarket intake kit from a reputable company like K&N or AFE. These kits don't require any additional modifications and are thoroughly tested on each vehicle before being sold to the public.

[d10]

If your car already has a turbocharger on it the correct answer is to throw in a boost controller and it's really not close. Intake and exhaust won't even be a noticable difference on a nearly stock engine, and exhaust is like your entire budget. You can build your own boost controller for like $5 with parts from Home Depot and it could give you up to 10x as much power as some air filter.

[GGrey]

[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
Not always true. A turboback exhaust will do wonders, but intakes don't typically do much for FI cars.

[/ QUOTE ]

I have to disagree regarding intakes. Most stock air intake boxes are overly restrictive. Installing a lager than stock open-style filter and eliminating the box will increase power and fuel mileage in almost any vehicle. More air to the engine = more power. In addition, more air to the turbo generally means more boost (and cooler boost), which means more power.

[/ QUOTE ]

You may be oversimplifying a few things.

Where is the MAFS located? Is the piping of the new intake a bigger diameter than stock? If the MAFS mount is completely replaced by the aftermarket, larger diameter piping, the ECU will adjust to skewed readings and run lean. Lean = Hotter = Dangerous to the engine + Decreased output.

Granted this can be corrected with engine management, but will require custom tuning, and some decent $$$$.

[/ QUOTE ]

The stock MAF sensor is normally still used with aftermarket intake kits. The sensors just adjust to the very slight increase in air flow, so the engine running lean is not an issue. Most engines will not even run (or run VERY poorly) if the MAF sensor is removed.

The key to increasing power here is replacing the stock restrictive air filter box with an open-style filter. This is where most of the power gains come from. No harm can be done to your engine by running an aftermarket intake kit from a reputable company like K&N or AFE. These kits don't require any additional modifications and are thoroughly tested on each vehicle before being sold to the public.

[/ QUOTE ]
I never mentioned anything about competely removing the MAFS.

Here's a diagram of what I'm talking about:

Intake ( ), MAFS '

Stock intake + MAFS: (')

Aftermarket intake + MAFS: ( ' )

The MAFS will read essentially the same airflow with the aftermarket intake as the stock one, however MORE air is being vacuumed into the engine than the MAFS can detect. The air velocity remains the same, which the sensor picks up, but the VOLUME is changed. Do you understand? This is why a protune is necessary to run these optimally.

Even notable aftermarket companies have less funds for R&D than automobile companies, and believe it or not, some stock parts are engineered just fine.

[GGrey]

[ QUOTE ]
If your car already has a turbocharger on it the correct answer is to throw in a boost controller and it's really not close. Intake and exhaust won't even be a noticable difference on a nearly stock engine, and exhaust is like your entire budget. You can build your own boost controller for like $5 with parts from Home Depot and it could give you up to 10x as much power as some air filter.

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This advice is simply awful. Never by any means should you just "Home Depot" a boost controller, and up your boost with NO boost gauge, and NO engine management.

[JRussell]

[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
[ QUOTE ]
Not always true. A turboback exhaust will do wonders, but intakes don't typically do much for FI cars.

[/ QUOTE ]

I have to disagree regarding intakes. Most stock air intake boxes are overly restrictive. Installing a lager than stock open-style filter and eliminating the box will increase power and fuel mileage in almost any vehicle. More air to the engine = more power. In addition, more air to the turbo generally means more boost (and cooler boost), which means more power.

[/ QUOTE ]

You may be oversimplifying a few things.

Where is the MAFS located? Is the piping of the new intake a bigger diameter than stock? If the MAFS mount is completely replaced by the aftermarket, larger diameter piping, the ECU will adjust to skewed readings and run lean. Lean = Hotter = Dangerous to the engine + Decreased output.

Granted this can be corrected with engine management, but will require custom tuning, and some decent $$$$.

[/ QUOTE ]

The stock MAF sensor is normally still used with aftermarket intake kits. The sensors just adjust to the very slight increase in air flow, so the engine running lean is not an issue. Most engines will not even run (or run VERY poorly) if the MAF sensor is removed.

The key to increasing power here is replacing the stock restrictive air filter box with an open-style filter. This is where most of the power gains come from. No harm can be done to your engine by running an aftermarket intake kit from a reputable company like K&N or AFE. These kits don't require any additional modifications and are thoroughly tested on each vehicle before being sold to the public.

[/ QUOTE ]
I never mentioned anything about competely removing the MAFS.

Here's a diagram of what I'm talking about:

Intake ( ), MAFS '

Stock intake + MAFS: (')

Aftermarket intake + MAFS: ( ' )

The MAFS will read essentially the same airflow with the aftermarket intake as the stock one, however MORE air is being vacuumed into the engine than the MAFS can detect. The air velocity remains the same, which the sensor picks up, but the VOLUME is changed. Do you understand? This is why a protune is necessary to run these optimally.

Even notable aftermarket companies have less funds for R&D than automobile companies, and believe it or not, some stock parts are engineered just fine.

[/ QUOTE ]

Lol...you're making it so much more complicated than it is. Aftermarket intakes are perfectly fine for FI engines. Buy it, bolt it on, and go. Absolutely no chance of damage when installed properly.

So, you went from saying "intakes don't typically do much for FI cars" to "the ECU will adjust to skewed readings and run lean. Lean = Hotter = Dangerous to the engine + Decreased output". To say a simple aftermarket intake will harm an engine without a "protune" is downright ridiculous. Do you realize how many millions of these are being run around the world with no problems? [img]/images/graemlins/crazy.gif[/img]

[d10]

[ QUOTE ]
[ QUOTE ]
If your car already has a turbocharger on it the correct answer is to throw in a boost controller and it's really not close. Intake and exhaust won't even be a noticable difference on a nearly stock engine, and exhaust is like your entire budget. You can build your own boost controller for like $5 with parts from Home Depot and it could give you up to 10x as much power as some air filter.

[/ QUOTE ]
This advice is simply awful. Never by any means should you just "Home Depot" a boost controller, and up your boost with NO boost gauge, and NO engine management.

[/ QUOTE ]

I thought he was just looking to make power for cheap. A boost gauge would be nice, but the stock ECU should be capable of handling a decent increase in boost. Some of the calls for engine management systems here are pretty crazy, this guy sounds like he's looking for a little extra power, not trying to turn his car into a monster.

If I wanted to give stupid advice I would have just said remove the boost line from the wastegate entirely and gogogo.

[blinden84]

Don't those cars have a lot of turbo blow out issues?

trade it in and get a WRX wagon, or a newer saab with the subaru engine. limitless upgrades availble for those cars.