The APS unit looks promising, but do you have any hard numbers on actual hp/trq improvements?

 

If only I had the time, I would dedicate my life to performance product testing - Trust me....

But I dont ......

No sorry no hard evidence, only my own experience, and the hundres of Aus cars that, have got a similar system. But if you ask nice, I guess the GUYs at Air Power Systems would give you some hard results, as there R&D Team do all the testing possible.

http://www.airpowersystems.com.au/us_spec/evo/evo.htm

this is dedication, a quote from the website:-

"It will be no surprise to many that APS has imported a left hand drive North American Lancer Evolution to Australia for product development, extensive testing and finally product fitment and tuning verification."

 

This is great. Shiv is the only one to offer empirical evidence that the stock airbox is fine through actual dyno testing. The rest is conjecture and nobody seems to believe that the stock system could possibly be a good setup. But I guess that doesn't sell air intakes.

 

Dyno testing is done static. As the car goes faster the air flow has to change. I have a buschur intake, but I wonder if this is really not a vote for the stock box as it has a bit of ram air effect. On the other hand the big air filter and intake are very unrestrictave and at higher hp levels have to be of some help. I changed intake,airfilter, and cooler piping all at once and gained a quarter a second at the track.

 

exactly..the intake tests done on a dyno will not yield much of anything.....I know of no dyno using a fan big enough to simulate 70 mph headwinds.

I know we have datalogged a couple setups with the HKS and ARC and spool times did decrease by a couple hundred rpm's.

Does that make it worthwhile? Surely not as much as an exhaust, but not a waste either.

 

The simple and cheap air filter kit ($65) we sell eliminates the factory air box but can retain the snorkel that feeds in some cooler air.

On the dyno we picked up 6 whp with it on back to back runs. We don't use any fans in our dyno room other than to blow out the exhaust.

Keep in mind that our EVO has gone 11.65 at 117.88 mph with this intake on the car. Also keep in mind that this is with the STOCK TURBO, STOCK HEAD AND STOCK ENGINE.

Thanks,

David Buschur
www.buschurracing.com

 

 

Last summer a couple of us used a road dyno to test the Ralliart Panel Filter. We made two stock baseline runs, then two runs with the Ralliart. The Ralliart added 5 whp on both runs as compared to the stock filter. Also, we both noticed that the car pulled stronger at higher RPM and the turbo spooled a little quicker.

The road dyno does eliminate the fan variable from the discussion . Five whp is probably close to the limit of the Road Dyno's resolution. It is very consistent run to run and car to car and the road dyno results have been consistent with chassis dyno’s. We where not data logging and cannot comment on the AFR's.


Speedlimit.....

 

Yes but did you pick up the power because of better flow or because the air intake kit changed the MAF voltage for the car to run leaner witch does make more power?

I'm sticking with the stock are box. I have already made 294whp with a cat back and custom tuning.

I do like the APS unit. Goes low into the bumper cover but my understanding is for turbo charged cars you really don't need to have a cold air intake because of the IC and because the turbo will make the air hot anyway.

Also the stock box does not have and restrictions like the DSM boxes did. That little air horn can flow enough to support well over 350whp.

Air Assult,

Again the stock box is diffrent then what came on the DSM. It does not have any restrictions. On a DSM I would change out the the stock box for the cone but on the EVO it's just not need.

 

Your understanding is incorrect. Lower pre turbo inlet temps will yield lower charged air temps post turbo and intercooler. Typical dyno results will not show actual improvement over under hood systems because engine bay temps are reduced due to the hood being open.

A large diameter inlet pipe that draws air from an ambient location. Will make more HP then any under hood system in any configuration. Used in any turbocharged application.

This is why your car feels more responsive in 40* temps then it does in 110* summer heat. Its also faster at the track when ambient temps are 70* and below as well.

Air flow and fuel enrichment for the most part is based on inlet temps and air flow registered by the mass air meter. If the Karmen vortex signal was changed it is due to increased air flow caused by a reduction in inlet restriction

 

then why don't them make any power on thire own? The power is coming from the maf voltage being altured witch again makes the car run lean.

Oh the reason my car feels faster cold weather is because cold air has more oxygen then hot air. Also the IC is cooler and more efficent because cold air is hitting it instead of warm.

Again your coming from a DSM. You don't own a EVO. Not to say you know nothing about turbo charge cars just that the air boxes are diffrent then what you have seen on DSMs. DSM's air boxes were very restrictive unlike the EVO Box.

My Best
Eric

 

The power is made from denser air and increased unrestricted air flow. The mass air meter reads such changes and determines the proper amount of fuel to add. More air=more HP. lower inlet temps= more timing which= more HP.

Now you get it

The intercooler cannot lower charged air temps beyond ambient. Just think how much easier the I/C's job is if the air coming in is already closer to ambient.

Physics are not vehicle specific.

A larger diameter inlet that draws air from an ambient location yields more HP then both.

 

I was taking about air boxes DSM VS EVO not physics.


I think your not understand what I have bin trying to say and would suggest that you re-read my posts and then comment.

 

DSM air box flow capabilities are irrelevant to this topic. This topic is about what turbocharger inlet type works best on a Lancer Evolution. Im not sure where you got confused.

With this topic in mind. A large diameter inlet pipe like the offerings from APS. Which draws air from an ambient location will yield more HP then any other inlet pipe type, air box or otherwise.

 

Have you seen the air box from the EVO?