Cold air intake?

944Lover · 03-19-2010, 12:43 PM

I have a 1986 944 base and I wanted to put a cold air intake system, and I am not sure which kind to put in. Any experiences?

krystar · 03-19-2010, 01:34 PM

your oem airbox is already a cold air intake.

944Lover · 03-19-2010, 01:59 PM

Yes, but I meant the upgraded one.

944Lover · 03-19-2010, 02:00 PM

Like that one

luftpirate · 03-19-2010, 02:03 PM

I would go for a Stock Cold Air Intake.

Rasta Monsta · Rasta Monsta's Garage

Don't waste your dough. The surface area of those cone filters is actually LESS than stock. In addition, the stock intake will draw cooler air than the setup pictured.

Quote:

Originally Posted by 944Lover

Yes, but I meant the upgraded one.

In other words, it AIN'T AN UPGRADE. Somehow though, I have a feeling. . .

944Lover · 03-19-2010, 02:14 PM

They advertise 12 to 18 hp gain

krystar · 03-19-2010, 02:17 PM

that is not a cold air intake. the air it's sucking in is not cold. it's actually very hot. coming off the alternator.

this is my cold air intake. I also have a blockoff plate to seperate the filter from the engine bay but it's not pictured

Rasta Monsta · Rasta Monsta's Garage

Quote:

Originally Posted by 944Lover

They advertise 12 to 18 hp gain

10% from an air filter, when the stock 2.5 filter is big enough for a V8?

That'll get you a big ol' ROFL.

krystar · 03-19-2010, 02:18 PM

Quote:

Originally Posted by 944Lover

They advertise 12 to 18 hp gain

well i advertise my intake for 30hp gain....does that make it true?

Rasta Monsta · Rasta Monsta's Garage

Quote:

Originally Posted by krystar

well i advertise my intake for 30hp gain

Dude, how much?

luftpirate · 03-19-2010, 02:22 PM

Quote:

Originally Posted by 944Lover

They advertise 12 to 18 hp gain

Send me your $$$ and Ill tell you its 20 hp

krystar · 03-19-2010, 02:31 PM

Quote:

Originally Posted by Rasta Monsta

Dude, how much?

944Lover · 03-19-2010, 02:34 PM

Quote:

Originally Posted by krystar

that is not a cold air intake. the air it's sucking in is not cold. it's actually very hot. coming off the alternator.

this is my cold air intake. I also have a blockoff plate to seperate the filter from the engine bay but it's not pictured

So has your system helped at all... And how much did it cost?

krystar · 03-19-2010, 02:52 PM

i'm too cheap to take it to the shop and get it dynoed.

besides, any measurement now is useless since i don't have baseline dyno done with the stock airbox.

on the filter side, K&N cone filter $40. 2.5" prebent aluminum piping...$15? 2.5" silicone coupler $10

on the other side, 2.75" 135deg silicone bend $20, 2.75" alum piping, 3" to 2.75 silicone adapter, 3/4" barb fitting for the AOS vacuum hose, 3/4" heater hose with preformed 90deg bend,

i only went this way because my car never came with a stock airbox. rather than go find one and buy a panel filter, it was more fun to make it myself.

944Lover · 03-19-2010, 03:06 PM

Why are these ones $300? Cold Air Intake - Auto Parts Warehouse
[IMG]http://www.***********************/images/product_images/thumbs_100/airaid/A86101400.jpg[/IMG]

flash968 · 03-19-2010, 03:12 PM

cold air intakes work, however, there are 2 primary factors involved in making it happen - it's not as simple as "stick on a cone filter"

1. reduction of negative pressure - you need a manometer to measure this, but it is a key to making it work

2. reduction of intake temperature

it must truly be a cold air intake to work - that means it cannot sit in the engine bay exposed to its heat - it must be isolated by means of a box, etc

also, the filter surface area must be AT LEAST as much as stock, and free of restrictions - many cone filters do not have a venturi bottom, and consequently present flow restriction

also, the plumbing of the filter to the throttle body must not create resistance (i.e. from tight bends and such) - that plumbing must also be heat wrapped to be efficient and prevent a loss of all the benefits of good filter placement

but, if you get it right, you can increase power about 2hp for every 15 degrees of intake temp dropped

properly done, a cold air intake can be good for about a 5% increase in power

944Lover · 03-19-2010, 03:20 PM

Porsche 944 Parts and Accessories would this be something I would want to buy?

krystar · 03-19-2010, 03:52 PM

Quote:

Originally Posted by flash968

also, the plumbing of the filter to the throttle body must not create resistance (i.e. from tight bends and such) - that plumbing must also be heat wrapped to be efficient and prevent a loss of all the benefits of good filter placement

to go even further on this point, the intake system must also rigid to create harmonic resonance to coincide with the frequency of the intake valves.

the 944 NA intake is good on restriction. the AFM is a flapper door. it's got a frigging 135 degree bend in the Jboot for christ sake. AND on top of that, the Jboot is rubber with baffles inside!

a better designed intake system would start with a 951 IM and TB, and a MAF on a hard pipe, and a venturi filter.

krystar · 03-19-2010, 03:53 PM

sounds like you really want to spend money....let me custom design a system for you!