Subaru WRX Forum

Subaru WRX Forum (
-   Bolt-on Tech (EJ255/EJ257 2.5L '04-07 STi and '06-07 WRX) (
-   -   Cold air or ram air? (

Bad98SS 12-22-2009 09:41 PM

Cold air or ram air?
What is better a cold air or ram air?

ratfink 12-22-2009 09:45 PM

Ram air does NOTHING for a turbo car.

VD5505 12-22-2009 09:56 PM

Look up on some posts on here that talk about modifying your stock air box, you can still make alot of power out of doing this to your airbox, Go out and buy a nice drop in air filter for it and people have cut them up and still made the car breath a lot better than it did. Also i know tuners say it is easier to tune a car with the stock air box that some cold air intake or something like that as well.

newtothegame 12-22-2009 10:49 PM

Ok, the links arent working on here for some reason. In the newbie section there is a link about CAIS and BOVs, check it out, it explains why they arent good, or worth much without more work than just bolting them on.

pzr2874 12-23-2009 05:11 AM

[quote=ratfink;237450]Ram air does NOTHING for a turbo car.[/quote]

WHY does everyone say this ? Explain your reasons ....

man show 12-23-2009 09:23 AM

Ram air intakes usually pull in warmer air from the engine bay - even to some extent with a heat shield. Cold air intakes pulls in cooler air from the fender area. Cooler air can be compressed more/easier than warmer air when going through the same system. Your turbo system's main objective is to compress air and force more into your engine. Therefore, the cooler the air you start with, the better the system will function and the more power you are likely to make.

Those are the basics. But technically, a ram air intake system will breathe a little easier than the restrictive stock intake system (in most cases), so a ram air system is better than nothing just in terms of being able to allow more air into the system.

RcrsWetDream 12-23-2009 09:45 AM

1 Attachment(s)
I dunno... The difference in IAT's between a ram air and CAI I feel should be negligable... The air is still going through a hot turbo after it gets sucked in... Maybe NA cars there is a bigger difference but FI should be a lot smaller margin. I'm not an expert though and for all I know the cooler air before the turbo does make a difference. Somebody needs to run an IAT test with stock airbox, CAI, and ram air setups and see if there is any noticeable difference in temps.

pzr2874 12-23-2009 01:30 PM

I know on the Suby system (because no one really makes a decent airbox) The stocker is good for some time BUT as a blanket statement it's a little far fetched. A guy on nastysock did an IAT test a while back.... I can't get on there from work (go figure).

ratfink 12-24-2009 08:45 AM

For the record I was speaking of a traditional "ram air" which consisted of a scoop and a directed intake snorkel to attempt to "ram" air into the motor. This is the type I was saying would be of no benefit to a turbo car. A "short ram" (I don't know why they call them that) may offer some benefits on some vehicles. Especially in the sound department.

pzr2874 12-24-2009 09:28 AM

Sound ? I don't care for that part (though some do)

I picked up 11 horse with an injen SRI and a custom box off a protune on my 07sti a while back. Picked up nicer #'s on my MS3 with a SRI and box.

We don't get enuff water/rain down here but when it rains it floods (reason I say nahh to the CAI's) Thanks for explaining.

VD5505 12-24-2009 09:29 AM

1 Attachment(s)
This equals Speed...Hot...Nasty...Badass Speed!!! haha now thats Ram Air!!

pzr2874 12-24-2009 11:22 AM

^^ Yeah, if they could only make it go...


All times are GMT -5. The time now is 07:48 AM.

Powered by vBulletin®. Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging v3.0.8pl1 (Lite) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

For the best viewing experience please update your browser to Google Chrome