people say they lose HP when...
 

some say they lose horsepower when they have a K&N typhoon SR intake on their car, but i just don't see how that's possible. :/
for anyone who has experience with this particular intake, what rpms are you losing HP?

This happens because of the location of the filter. Where the filter on the K&N is located it sucks in a lot of hot air from the radiator.

Plus the size is different and it is missing screens to stratghten out the air flow so the MAF can read correctly.

i see...

K&N does use 1 screen.

hhhmmmmmmmmm

really,

have you looked at the set up?

just wondering.

beers :beer:

as does the racing beat. ;)

beers :beer:

if the air intake sucks in hot air, doesn't it defeat the purpose? :lol: better off with the oem one?

if you are talking about the kn v2. you really need to see it or look at how it is located..

it gets the air from the same place from the stock intake.. and the next issue is covered by hood location..

beers :beer:

I have the k/n V2 and the only time I notice a loss of power is 85+ degrees by then its completey heat soaked, but I just insalled a RB air duct and it works out a whole lot better.

really,

why and how.

beers :beer:

I ran with the k&N v2 for about 40,000 miles and logged intake air temperatures as high as 190 degrees when it was about 110 degrees ambient outside.

As stated, the intake requires you have all your engine panels installed to provide a seal but the problem is air still gets into the intake from the motor and most people don't run all of their plastic engine panels anyway.

As your intake air temps increase, you're robbed of power AND you also risk detonation if you're tuned with leaner air/fuel mixtures.

I've seen posts from other people that the RB air duct provides some relief from the warm air. The best method is to either go with a true CAI like the AEM or to stick with the stock intake.

While BHR hasn't had an opportunity to get hard data, it's our stance that the stock intake is more than capable of delivering the necessary flow for the RX8. If anything, you can get a drop in green or k&n filter for it.

ahh the sound ...... im actually in the process of insulating the KnN ver 2i have. i found that majority of the heat is actually being radiated thru the bottom or whats remaining of the stock intake setup when the ver 2 is installed cuz the radiator is right under it. also, theres a gap i found and sealed which is where the VFAD duct enters the intake box, there was like a 5mm gap around the vfad duct and the stock intake box so when the rad fans are on and air is being pulled thru the radiator, some gets thru that gap and the intake temps rise. ill post pics when my whole experimental thingy is done. so far ive noticed a difference cuz the filter is a little cooler than the intake tube after a long drive now whereas before, it would be the same temp.

when i installed mine i did feel the difference you lose low end torque but u kinda get it back in higher rpms

Cuz it scoops up cooler outside air. I wish I had a temp gauge to show some numbers but sorry I don't. It just feels like it runs better with the RB duct unless your in stop and go traffic then your kinda scewed. I should of bought the duct when I bought the intake tho.

The reason why VFAD is not good for K&N V2 is that

They position VFAD vertically, and the "opening" is right inside the fender above the oil cooler. its ok for stock intake because everything seals and thats the only opening, so if the engine "wants air", it will create a vacuum and it will only get air from there. It doesnt matter if the car is not moving or moving.

but if you use K&N with it. there is a space between the VFAD and K&N's filter. so when engine wants air, remember VFAD sits "inside" the bumper at all times and there is no vacuum because its not seal. so there is nothing there to push fresh air in. then K&N will suck whatever air thats around them. This engine needs quite a lot of air at high rpm, maybe thats why some people are experiencing lack of power with stock VFAD + K&N.

If you use RB duct with it, its opening at the front. when your car moves, the air will blow direct into it and feed the K&N filter happily.

I just dunno why K&N never thought of that. They could really design something better. or maybe make a special intake like RB Duct + AEM or something.

I just went back to stock yesterday after having the K&N on there for a year and I noticed a huge drop in my IAT. With the K&N at idle intake temps would climb well over 100 degrees on a 70 degree day. Now they stay about 10 degrees above ambient temp with the stock intake back on.

Power wise, if the K&N gets heat soaked sitting at a light you can definitely notice a loss of power in the low RPM's up to like 4k, but it totally makes up for it on the top end. Also, once the car is moving again and air starts circulating around in the engine bay the intake temps go back down.

All I can say is that I'm going to miss the increased rotary sound and extra top end power from the Typhoon. :-(

Just buy the aem intake

Or just go with an RB Duct (VFAD removed), stock intake and a K&N flat filter. ;)

Better yet... get the RB intake and duct.

i have a mazdaspeed cold air intake and i love it you can feel the diffrence from stock

I like the k&n because I can hide the zex module and it makes my setup fully stealth! And it sounds good too!

why'd you go back to stock?

alright everyone, so pretty much what i'm hearing is that it is just trial and error, cause i'm hearing A LOT of different things

I went back to stock because I am selling(sold) my K&N because I need the money. lol

ur probably better off using ur money on something else,

Just so you know Butt Dyno is not that accurate.

I had K&N v2 and now Im using Mazdaspeed. so I know.

:mchase:

Most people who said "K&N SUCK DICK" never even seen the intake in person. So you dont need to listen to them.

I used both (K&N and AEM/Mazdaspeed) so I know best.

K&N will give you the highest top end gain. lower end feels the same as stock. Stock VFAD is not good for K&N, cuz there is not enough fresh air coming in, even when the car is moving. So use K&N only with Things like RB Duct or Re-Amemiya Duct(expensive).

AEM/Mazdaspeed looks good, but during hot days, the metal pipe will be soak in heat so basically your air is traveling thru "hot pipes"all the time. The pipe is actually too hot to touch. during idle, AEM/Mazdaspeed's IAT will be lower than K&N . if you're going with AEM/Mazdaspeed. I would recommend you to seal the metal pipes with something. Another thing is that the position of the filter is right in front of the Radiator. its not really a problem when the car is moving, but if stuck in traffic and The radiator fan kicks in, all the hot air will go from the fan and hit that filter.

If you want better bang for buck, just get a K&N drop in filter, then spend some extra money for a better(lighter) exhaust. stock exhaust weights 37 lbs

Soon I will put Mazdaspeed back into the box and put RB duct + K&N back on, or just put it back to stock. I love different sound :)

If you get the k&n make sure you get the RB air duct! And you'll love going WOT under overpasses sounds like a street bike!

yeah but most short intakes have a heat shield to absorb from getting heat soak so if you can get one and put it on that should help alot

Read what swoope has said

plus, the back of the K&N has a layer of reflective material, its heat shield ...

well i ran the rb duct and intake for a very long time. i am now running stock..

the intake temps are cooler with stock. under all conditions..

i have a k&n v2 on the way, but it is going to be modified somewhat to do a couple of different things.

i do plan on sealing the top, and the the vdaf to the the front of the firewall.

beers :beer:

I'm sorry nycgps, but this is all completly wrong. You make the case the K&N is great but then you give the very information which makes it a bad choice.

As I stated above, I'm against this intake after having used it for 2 years and over 40,000 miles. I currently own the AEM and have found it to be superior with the only other better intake being the stock intake system. The very reason the K&N is a poor choice is because of the increased intake air temps. Hot air robs you of power.

Ok, so if the pipe is so hot then why are the intake air temps going to be lower than the K&N? In all cases my IAT's are only a few degrees above the ambient temperature even at idle. As for the filter placement, the radiator fans pull air through the radiator, not pushing air so the filter itself isn't exposed.

You could make the case the radiator fans would blow hot air against the intake pipe but the K&N is worse for that since the filter element is down wind where the AEM is in front of the radiator.

Here's a thread in the AZ Mazda Club website which shows datalogs from the K&N and AEM taken under pretty similar conditions:

http://www.azmazdaclub.com/forums/sh...5&postcount=83

The AEM is within a few degrees of ambient while the K&N is about 20+ degrees above ambient @ 70mph cruising speeds. I've actually seen 190 degree IAT's with the K&N.

Honestly, unless you want to pay $300 for sound just keep the stock intake system as it works just fine.

I was saying most people. not all. Which is true.

For me, K&N works ok, its not the best and seriously they can do better than that. oh well :(

I was probably the first one on rx8club to have this intake and I've been using it more than 2 yrs b4 I switched to Mazdaspeed late last summer so I think I know what Im talking about.

I monitored IAT myself and yes, IAT is pretty high at idle, but as soon as the car moves. it drops pretty quickly, in fact, its about the same as AEM when moving. I did say that AEM/Mazdaspeed has lower IAT. I even said it in my post.

Thats because AEM/Mazdaspeed extend the pipe all the way out, like I said before the IAT is higher for K&N at idle. when moving. its about the same.

Is it just me? When my fan is on I feel the air being pushed out, not the other way around.

You need to have the stock intake tray underneath for K&N. so it blocks pretty much most if not all of the air you talked about.

AEM/Mazdaspeed works with/without the tray. but pipe is still too hot to touch. I tried both configuration.

I seen something like 170-180. NYC would never get as hot as AZ.

but again, as soon as the car moves, the iat went down pretty quickly. I am curious did ya use RB duct or VFAD for K&N ?

agreed.

My car doesn't even sound like a sports car anymore with the stock intake on. It quieter than a f*cking toyota camry. :-(

Keep the stock intake but remove the VFAD. No cost, easy (you do have to remove the bumper) and a noticeable difference.

are you serious about this ? :lol:

Yup. Obviously no Hp gain (none expected), but the VFAD opening hesitation is gone. Everyone should ban the VFAD. ;)

alright everyone, i REALLY appreciate the help!! all of these ideas have lead me to make my decision

NO AFTERMARKET INTAKE... instead, i just went to autozone and bought a spectre air filter (the cone shaped one) exact same as the K&N only it's not. i stuck that on the little cylindrical shaped thing that's screwed into the airbox, then cut out a huge hole in the airbox and voila. i have an awesome sound w/slight increase in horsepower, and better throttle response...all-in-all i spent about 30 bucks

stock airbox mod.....that's all u need

it works/sounds brilliant

You drilled a hole on ur air box ? argh ... :sadwavey:

haha more like cut a rectangular shaped hole, about 7x4...sos the filter can breath better...obviously

*sigh*

I dont know what to say now, someone say it for me.

looks like this

wow ... no offense but ... you failed ....

if you want "noise", all you need to do is remove 2 pieces of plastic inside the box and you will get the noise that you want, and if you want better flow rate , you could've got some green filter or K&N filter.

Now ... argh ...

haha i already removed those two plastic pieces and it still didn't give me what i wanted....i'm glad you think it looks good!! hahaha

do you mean the K&N filter that is the same shape as the original filter?

rofl ...

yep ... it will give you even more noise ... but guess its too late now.

and you will get even less power ... *sigh*

Ok Ok I'll say it.

You failed, you are now loosing horse power.

Do a search and you will find out why.