Air intake mods

[sergei]

A cold air intake system that provides even a little bit denser air throughout the entire operation of the engine should help to even out the factory conservative AFRs so the gains you would see would not only be from the extra flow but also from getting closer to stoich

on the topic of 3sgte there is a whole lot more to be had than 250hp out of the box, as with most modern 2L turbos

Factory system is a cold air system .

[Grrrrrrr!]

what your saying about that feels faster because of a torque dip, is not because of those resonators patching up holes but because for every free flowing mod that you do, you always sacrifice a bit of bottom end for top end.

No, i disagree strongly. Replacing a clogged shitty filter for example, it improves flow eveywhere, there does not have to be a bottom end loss for you to make a top end gain. There might well be no gains at lower revs from an intake mod, but only a really shitty design should cost you power anywhere in the rev range.

I'm going to be a smartass and point out that going from a small turbo to a large turbo usually sacrifices low end for top end, are you going to try and disprove that?

Oh, right, turbos are what most people calss as intake mods... my bad.

But really the point I'm making is that a factory restriction may very well be to help low end drivability along with keeping things quiet, removing the restriction will always take away that advantage if it is so designed to be there.

define drivability.. cos that seems like some wishywashy BS term that could mean anything.

+ What you said really defies what is possible since you're basically saying you can lengthen the power band using the same consistent profile, if that were the case engines would rev to infinity

Oh god, powerband. another term that means about 30 different things depending on who you ask.

[Grrrrrrr!]

A cold air intake system that provides even a little bit denser air throughout the entire operation of the engine should help to even out the factory conservative AFRs so the gains you would see would not only be from the extra flow but also from getting closer to stoich

Err, except that the ECU will detect higher higher mass flow rate from the MAP and temp sensors and adjust the fueling...

[Kiwi-Corolla]

This is the CAI that I made for my brother's Caldina GT-T:

[gt4dude]

what your saying about that feels faster because of a torque dip, is not because of those resonators patching up holes but because for every free flowing mod that you do, you always sacrifice a bit of bottom end for top end.

No, i disagree strongly. Replacing a clogged shitty filter for example, it improves flow eveywhere, there does not have to be a bottom end loss for you to make a top end gain. There might well be no gains at lower revs from an intake mod, but only a really shitty design should cost you power anywhere in the rev range.

I'm going to be a smartass and point out that going from a small turbo to a large turbo usually sacrifices low end for top end, are you going to try and disprove that?

Oh, right, turbos are what most people calss as intake mods... my bad.

But really the point I'm making is that a factory restriction may very well be to help low end drivability along with keeping things quiet, removing the restriction will always take away that advantage if it is so designed to be there.

define drivability.. cos that seems like some wishywashy BS term that could mean anything.

+ What you said really defies what is possible since you're basically saying you can lengthen the power band using the same consistent profile, if that were the case engines would rev to infinity

Oh god, powerband. another term that means about 30 different things depending on who you ask.

Noone has a gun to your head. By all means keep your abs plastic and cotton.

[possum]

If your car standard (no huge cams/aftermarket ECU) reverted to standard air box, it will have more torque and power across the board that way.

Perhaps on american/russian/chinese cars these filters have gains, but on japanese they only do harm.

May be to Toyota's but Honda's loving it

[Tagged]

my 1st post that lasted 4 pages long

[Flannelman]

Trying for 5!

The only time that poorly filtered engines will show loss of power is due to the amount of air it restricts. As RPM rise, so do the requirement of airflow. On a dyno, this will be seen in the top end as the engines air requirements are at there most. I can back this up with a dyno run with a dirty/clean pod filter. The dirty pod cost 2kW at the wheels. Torque upto about 6000 was the same. Above that, the clean filter aloud more air to enter the enigne, increasing torque and power. (engine, 1600 4age 20v)

A similar experiment was conducted with the old mans BA XR8. First run netted 235kW at the treads till the air cleaner was disconnected and the intake pipe was left open and unrestricted. The next run netted 245kW. Again, below 4000 both torque curves remained the same untill the unrestriced intake grabbed more air and produced an extra 150-200N tractive effort. (engine, 5.4L DOHC V8.)

Both examples show the same result from two forms of air filter restriction. Mine shows the difference between dirty and clean where the old mans shows the difference between having an air filter too small for the air requirements for the engine. The other way intake restrictions affect performance is fuel economy.

Also, NEVER put a pod on some subarus. There airflow sensor is a turbulent type and without the airbox the airflow sensor doesnt give the computer correct airflow readings and the engine will not run.

[MAC_HATER]

Also, NEVER put a pod on some subarus. There airflow sensor is a turbulent type and without the airbox the airflow sensor doesnt give the computer correct airflow readings and the engine will not run.

But the homies what that phat intake pulse bae!

i can agree with that though - not sure if its the same AFM setup on a RS legacy but my brother recently bought a RS Legacy with a phat g unit chrome plated chinese fake peice of crap pod on it - was buried in near the engine so it sucked in nothing but hot air and was running "odd" - he didint want to keep it and didint want to go to the effort of making a proper intake setup so he just bought a Factory arbox setup off some ricer on trademe that upgraded his to a phat fake chinese chrome pod filer (what is it with flatpeakers dna chrome plated pod filters?) - anyway he bolted it in and it suddenly ran ok - has been going ok for a riced out subaru too

now he just needs to remove the BOV that sounds like its got a cat or kazoo stuck in it or something >_<

[loudstealthGT-Four]

Also, NEVER put a pod on some subarus. There airflow sensor is a turbulent type and without the airbox the airflow sensor doesnt give the computer correct airflow readings and the engine will not run.

But the homies what that phat intake pulse bae!

i can agree with that though - not sure if its the same AFM setup on a RS legacy but my brother recently bought a RS Legacy with a phat g unit chrome plated chinese fake peice of crap pod on it - was buried in near the engine so it sucked in nothing but hot air and was running "odd" - he didint want to keep it and didint want to go to the effort of making a proper intake setup so he just bought a Factory arbox setup off some ricer on trademe that upgraded his to a phat fake chinese chrome pod filer (what is it with flatpeakers dna chrome plated pod filters?) - anyway he bolted it in and it suddenly ran ok - has been going ok for a riced out subaru too

now he just needs to remove the BOV that sounds like its got a cat or kazoo stuck in it or something >_<

so much hate on the homies bae

[h8wrxs]

i think the problem is with people wearing flat peaks in the first place, not the cheap chrome crap

flat peaks look pretty gay imo


* i know this post has nothing to do with air intakes, just trying to hit 5 pages lol

[gt4dude]

This is the CAI that I made for my brother's Caldina GT-T:

I made this same intake on a Gen 3, 3S-GE Celica and the butt dyno read alot higher than both factory intake and short ram intake from as low as 2000 rpm.

[Kiwi-Corolla]

I made this same intake on a Gen 3, 3S-GE Celica and the butt dyno read alot higher than both factory intake and short ram intake from as low as 2000 rpm.

Great to know. After driving it we could feel that it made a big difference over the factory intake or a short ram, but we didn't take it on the dyno to compare the figures. He made 165kW at the wheels when it was bone stock aside from a K&N panel filter, so it will be interesting to see what he's making now. Although he has since installed a Mine's ECU so we won't be able to see how much difference the CAI made on it's own. Was well worth the effort however

[mikeBrotherd]

I just want to add my findings Ive had with my supra. Below is my current intake, came with my halfcut when i got it. I have been monitoring temps to see how hot things were getting under the bonnet, i managed to get a whopping 75~80deg! This thing was sucking in so much hot air that you couldn't touch the base of the airfilter for more then a few seconds!


Since then, i have put a small shield between the filter and the flow of hot air from the radiator and added more area to the front of the vehicle for air to enter, this got temps down to below 40deg. Big improvement in temps and i don't get a hesitation from the engine when driving hard (probably due to the ECU not pulling timing to prevent detonation).


Also a pic of a Ford Sierra Cosworth setup, doesn't look like much but has a big enough filter to supply demands and a small shield to keep unwanted heat away.