How much HP will a cold air intake boost you?

[BigBoizGS]

Yea i was just curious on about how muhc HP a cold air intake will give you. Im makeing my own im good with bening metal and stuff and know where to run it for the cone. so im just curious whatr the HP could be. Thankz

 

[Tallen]

Realistically 5-7hp.

 

[SoSprayMe]

Originally posted by BigBoizGS
Yea i was just curious on about how muhc HP a cold air intake will give you. Im makeing my own im good with bening metal and stuff and know where to run it for the cone. so im just curious whatr the HP could be. Thankz

Do it and find out? You would be a lot of help for other people who ask the same question every day. Dyno the car now and dyno it again after. Maybe you can stop people from guessing and saying "5-7hp," when they probably don't know or they’re relaying information from some other person/site who didn't know either. You shouldn't be really asking this question though to be completely frank. The power gained from a conical filter is MINIMAL. When you remove the stock air can or box you are exposing the intake to the engine's extreme heats. By doing this you are heating up the intake charge which in turn lowers the oxygen count which then leads to detonation. I’m sure you have a newer "DSM" so I know your ECU will notice this lack of oxygen and it will retard your timing which will yield negative power gains. Even if you slap on a "custom" cold air snorkel pipe you are still getting warm air from around the engine and other rotating parts. This will result in a less dramatic power loss. Just save your 50$ and put that towards a nice turbo kit.

Just my $.02; best of luck,



[Edit-> When I said you probably have a newer 'dsm' I didn't feel like going back to check so forgive me.]

 

[Liquid Illusion]

Do it and find out? You would be a lot of help for other people who ask the same question every day. Dyno the car now and dyno it again after.

Typically a dyno will not yield the actual results seen by a CAI. On a dyno the hood is open and the inlet air is shop ambient. A much better measure would be a few passes at the track.

 

[Tallen]

In essence, there is no good way to measure it. Like I said. 5-7hp is a realistic value.

 

[SoSprayMe]

Originally posted by Liquid Illusion
Typically a dyno will not yield the actual results seen by a CAI. On a dyno the hood is open and the inlet air is shop ambient. A much better measure would be a few passes at the track.

I understand where you're coming from but a Dyno will still show the gains of the intake. As everything else is a constant, the only thing being changed is the intake itself.

Originally posted by Tallen
In essence, there is no good way to measure it. Like I said. 5-7hp is a realistic value.

And no 5-7 is still not a realistic value.

 

[jason@boost*]

Originally posted by SoSprayMe
I understand where you're coming from but a Dyno will still show the gains of the intake. As everything else is a constant, the only thing being changed is the intake itself. And no 5-7 is still not a realistic value.

Yup, I agree with you a dyno will show gains with an cold air intake. When I was at school (hotrod U/uti) we did this in street legal performance. My group got to try this cold air mod in a couple of cars, the 94 Camaro w/350 that we ran gained about 15 to 25 hp just by adding a cold air kit with a k&n back to back dyno runs. The 4 banger focus we ran back to back got us about 5 to 7 hp more horsepower. We did this a couple times just to see and average the runs out and I was impressed to see that there were differences.

 

[Zenja]

Now the question is how would those differences compare on a turbo, intercooled car. I know that a CAI is quite useful on N/A cars but I don't know about ours. I'm thinking of making some simple setup to just kind of block off the air filter from behind and get air from the front.

 

[1fast97gsx]

I don't know how much it would help on a turbo car, but I'm sure it won't hurt. I'm going to be doing this on mine.

 

[TurboSpoolinIns]

Seriously, on an n/a car? REALISTICALLY, it'd be lucky to gain 3-4 whp if even. On a V8 though, that's a different story. On a 4 cylinder with 130 hp, I'd expect gains to be unnoticable as they realistically are. This thread is starting to sound like n/a Honda guys talking about how they gained 10 hp off an intake.:thumbdown

 

[Groomz]

Here's how a turbo works:

Its sucks in air at X temperature. It then spits it out at X psi at a higher X temperature. This is from adiabatic efficiency and the fact that turbo's are not 100% efficient. This basically means that the turbo is going to heat the air when it compresses it. How much depends on the compressor efficiency at that boost.

Use this to find out:
http://www.stealth316.com/2-turbotemp.htm

So your blowing 16psi and the turbo is sucking in hot engine bay 150F heat. It comes out at 354F. That's alot of work for the intercooler, which is why its there in the first place.

So now you have installed your CAI ( cold air intake ). Good for you. Now its a sucking in a chill 75F. Same psi and compressor as before, you are now blowing out 254F.

354 - 254 = 100F.

The intercooler now doesn't have to deal with that extra 100F that you were going to throw at it, but your CAI has saved it some trouble.

 

[turboeclipse008]

Am i the only one here that realizes that cold air on the 4g63 SLOWS DOWN TURBO SPOOL!!! On the 4g63 you have to go short ram!

 

[Groomz]

Originally posted by turboeclipse008
Am i the only one here that realizes that cold air on the 4g63 SLOWS DOWN TURBO SPOOL!!! On the 4g63 you have to go short ram!

You really ( x3 ) need to explain this one.

 

[terminaltsi]

IF YOU were to make a ram air type of setup, you could see some decent gains by the sharp decrease in intake air temp. you can monitor this decrease with a datalogger. like someone explained above, colder inlet air will increase the overall efficiency of the turbo/intercooler system.

 

[Liquid Illusion]

Also keep in mind as air speeds increase the air temperature decreases. This is reason number two why the gains of a CAI cant completely be realized on a dyno.

 

[Groomz]

Originally posted by Liquid Illusion
Also keep in mind as air speeds increase the air temperature decreases. This is reason number two why the gains of a CAI cant completely be realized on a dyno.

The CAI would make a more significant difference than a ram air would. Assuming you could get 2psi of pressure from the ram air, it would drop the temps 20F. A difference, but not much.

 

[Liquid Illusion]

Originally posted by Groomz
What do you mean?

Its called wind chill. Air in motion has a reduced temperature value then at rest. As you drive through the air. The temperature value seen at the inlet point. Is reduced when compared to the inlet temperature when your vehicle is not moving.This is only effective if your turbo or inlet tube is placed in a location where it can pick up oncoming air.

 

[kpt4321]

Originally posted by Liquid Illusion
Also keep in mind as air speeds increase the air temperature decreases. This is reason number two why the gains of a CAI cant completely be realized on a dyno.

HUH?

The speed of WHAT increases as temperature decreases?

 

[kpt4321]

Originally posted by Liquid Illusion
Its called wind chill. Air in motion has a reduced temperature value then at rest. As you drive through the air. The temperature value seen at the inlet point. Is reduced when compared to the inlet temperature when your vehicle is not moving.This is only effective if your turbo or inlet tube is placed in a location where it can pick up oncoming air.

No, it does not. Air in motion has the EXACT SAME temperature as it would at rest.

Wind chill is a system that is just made up to describe the effect moving air has on any body which has a hotter temp than the air itself.

If you were to put a temperature probe far enough away from the car such that it is not effected by the heat created by the motor, and also you were to isolate it such that its temperature did not change due to conduction through whatever it was connected to the vehicle with, then you would see that the temperature stays constant no matter what the vehicle's speed is.

Temperature is a measure of the average kinetic energy of the air. When you move something through this air, the kinetic energy of the air is certainly not going to magically go down.

 

[kpt4321]

Originally posted by turboeclipse008
Am i the only one here that realizes that cold air on the 4g63 SLOWS DOWN TURBO SPOOL!!! On the 4g63 you have to go short ram!

You're dumb.

First of all, the effects of air temperature on spool are so small that you're not going to notice them.

On one hand, yes, the turbo has to "move" denser air so it will accelerate slower.

However, the second that denser air hits the motor, you will be making more power than you would with hotter air, and when that denser air leaves out the exhaust, you're going to have a greater exhaust gas volume and therefore more energy spinning the turbine blades.

In the end, the spool is not going to be effected by an amount large enough to care about.

Cold air wins. End of story. It guarantees that the car will be faster, no question.

 

[LandoAWD]

Originally posted by kpt4321
You're dumb.

Play nice, Kyle.



Anyway, guys, would any of you take the time to realize he/she has an N/T?

Moved to Newbieville.

 

[Liquid Illusion]

Originally posted by kpt4321
No, it does not. Air in motion has the EXACT SAME temperature as it would at rest.

Wind chill is a system that is just made up to describe the effect moving air has on any body which has a hotter temp than the air itself.

Fair enough unfortunately the inlet temperature probe plumbed into my inlet tube does not support your ideas.

If you were to put a temperature probe far enough away from the car such that it is not effected by the heat created by the motor,

This is exactly what has been done.

 

[boozeted]

one thing i didnt notice anyone say, excuse me if they did. but a CAI [especially on turbo cars] has greater affect with exhaust too. hence all flow. so say u gain 5hp from CAI with stock exhaust. with upgraded exhaust and stock intake, you gain maybe 10hp. however, if they are combined you might make closer to 20hp or more, depending on elevation, temp, etc.


thats what really helps

 

[timmy]

About a year ago a magazine, not sure which one did a test with a n-t eclipse. A cold air intake and header back exhaust it showed like 3 hp gain ont he dyno. If i had a n-t i wouldn't spend that much money for just 3 hp.. My 2 cents

 

[RavenEclipse]

Yep you'd get 2 hp if you're lucky.