[DarkMagician]

I've seen many people swap out stock parts and put new stuff in.
What does Cold air intakes and exhaust actually do, besides making your car sound like a jet engine?

[jakex1]

cold air, the filter is further away from engine bay so it takes in cold air. basic knowledge of science shows cold air is denser and more compressed, more air u ignite, = more power.

exhaust: air flows more freely, yadda yadda, more useful on FI cars where u need to get rid of backpressure

[Clix]

In layman terms, it frees up a few horsepower. You won't that much of a difference half the time, though.

[azn akira]

more useful on FI cars where u need to get rid of backpressure

while it is true exhaust tends to gain a lot more power on FI cars you do not want back pressure whether the car is NA or FI

[jakex1]

while it is true exhaust tends to gain a lot more power on FI cars you do not want back pressure whether the car is NA or FI

yes, maybe i worded it wrong, getting rid of backpressure on FI cars is better/more hp, than a NA

[Mr. Chan]

In layman terms, it frees up a few horsepower. You won't that much of a difference half the time, though.

I concur. A lot of the ricers think that these mod actually gives you hp. They don't realize it frees up the restrictions.

[jakex1]

I concur. A lot of the ricers think that these mod actually gives you hp. They don't realize it frees up the restrictions.

well u are getting more HP regardless

[Radiance]

don't forget they should be used together o.o, putting a huge CAI and keeping your exhaust stock could net you negative figures

[azn akira]

A lot of the ricers think that these mod actually gives you hp. They don't realize it frees up the restrictions

frees up restrictions therefore making the engine produce more hp....also the exhaust on an NA car is more than just freeing up restrictions

don't forget they should be used together o.o, putting a huge CAI and keeping your exhaust stock could net you negative figures

uhhh 99% of the time doing only one will increase the power produced by the engine

[Mr. Chan]

frees up restrictions therefore making the engine produce more hp....also the exhaust on an NA car is more than just freeing up restrictions

The engine is already making that power. The stock components which is used is what's robbing that power. I wouldn't necessarily say that those mods produce more power. Rather, they free up what was lost.

[jakex1]

The engine is already making that power. The stock components which is used is what's robbing that power. I wouldn't necessarily say that those mods produce more power. Rather, they free up what was lost.

i think this is gonna lead to a philosophical debate... lol


but i guess "freeing up" power makes more sense.

if you were to get married and pay less on taxes. you arent making more money, just freeing up cash

[Mr. Chan]

i think this is gonna lead to a philosophical debate... lol

I can see mods such as cams actually making more power since it's changing the characteristics of the engine by having a more aggressive lift and duration.

[azn akira]

The engine is already making that power. The stock components which is used is what's robbing that power. I wouldn't necessarily say that those mods produce more power. Rather, they free up what was lost.

no its not already making that power especially with exhaust system which can change the scavenging effects. your argument is more inline with a lightweight flywheel than intake/exhaust which doesnt increases the power output from the engine.

[Mr. Chan]

no its not already making that power especially with exhaust system which can change the scavenging effects. your argument is more inline with a lightweight flywheel than intake/exhaust which increases the power output from the engine.

Anything that frees up restriction isn't magically putting out more power.

It's like losing money at a casino. If you lost 300,000 and go back months later and win 100,000, you didn't necessarily win that 100,000. Rather, you got back 100,000 of what you lost.

[jakex1]

Anything that frees up restriction isn't magically putting out more power.

It's like losing money at a casino. If you lost 300,000 and go back months later and win 100,000, you didn't necessarily win that 100,000. Rather, you got back 100,000 of what you lost.

like i said, philosophical

[Mr. Chan]

like i said, philosophical

Over 9000 man. Over 9000.

[switchlanez]

^ (that's that vegeta meme but i don't get it)

Mr. Chan is saying an increase in airflow efficiency won't change the potential output power of the engine but it will bring the engine's output power closer to its potential.

azn akira is saying an increase in airflow efficiency will result in more power being made in the engine which wasn't being made prior to the airflow mods.

I'm seeing different verbiage to say the same thing: increase in engine output power.

[azn akira]

Anything that frees up restriction isn't magically putting out more power.

i understand what you are saying, but im saying for things like exhaust systems (and intake runners/velocity stack lengths too but this thread isnt about those) are not just about freeing up restrictions. they can be tuned to make the engine operate more efficiently at differing points in the power band. if it were just about freeing up restrictions than running open exhaust ports would be the best but it's not

[jakex1]

i understand what you are saying, but im saying for things like exhaust systems (and intake runners/velocity stack lengths too but this thread isnt about those) are not just about freeing up restrictions. they can be tuned to make the engine operate more efficiently at differing points in the power band. if it were just about freeing up restrictions than running open exhaust ports would be the best but it's not

^hes got a point




but simply put. wether u make it or free restrictions u get MORE HP

hmm, if u free up restrictions, wouldnt u actually be making more hp?

for example: you need to move bricks. by yourself you can move 10, but with a cart, you can move 50.

[azn akira]

hmm, if u free up restrictions, wouldnt u actually be making more hp?

well yes, but there is more to it than just that. for NA applications there is a thing call scavenging. basically you use the exhaust pulses to help draw air through the combustion chamber, you have to can change the header length, diameter, and collector style to have differing effects.