RE intake acceleration?
 

i installed the Rotary extreme intake and find a slight hesitation around 4200 and other times when i increase acceleration at almost any speed. it only lasts a millisecond but feels like the car "misses" . After that, it accelerates smooth. any one have similar feedback?

I noticed that with the Typhoon as well.....

Do either of you have exhaust done as well?

For that reason i say, K&N drop in is most effective way to go, or just stay stock!

actually, i heard K & N is much worse. mine ive noticed over the last day or so seems to be doing better, especially after warmed up. still, just a touch of hesitation. overall, the sound has become addictive and am more and more comfortable with the change... what have you done with yours, tommy?

no not yet...my borla is on the way.
rudy

Rudy,

I would check your install just in case. My RE intake works perfect.

I only have the K&N Drop in

I Noticed
 

I noticed that you have the CZ Stage 1. Many people report a slight hesitation in the middle rev range before it picks up a surge in power (around 5000 RPM), could that be an issue ?

no stage 1 yet...only mod so far is the RE intake. I notice hesitation when i start off from a red light,(like a stalling )
i noticed that i installed the air mass meter on the side of the intake tube rather than on the top as shown in the instructions and will change that tonight, if the electrical cord attatched is long enoough. for some reason it seemed short so i just mounted it on side. i will notify tonight. since i am the only one having this problem, i imagine their is some problem with MY install...can you believe it?!! thanks for your responses and i will post my results as they unfold.
rudy 8

i moved air mass meter to top of intake tube as opposed to the side. no more hesitation. also, added foam insulation under heat sheild for noise reduction and that made the intake more liveable.
rudy

Mazda (and vendors) engineers spent about three years designing and testing the intake system, including the spout and airbox. Moreover, if there is a MAFS, it was calibrated with the standard upstream intake elements fitted. Any change in this set-up will make the MAFS read the wrong mass air flow.

K&N and others probably spent a few hours taking measurements in an engine bay at a nearby dealer and designing a kit which fits the available space.

Don't be surprised of rough idling and 'misses'.

it was that way when i had mafs mounted on side (not per instructions provided by chuck!) so when i remounted it correctoly, it now idles beautifully, no missing and great sound.
it always pays to follow instructions!
RE: K & N...i have heard they cobbled together a terrible intake but ROTARY EXTREME seems to have done thier homework.
rudy

mod edit Bashing other members will not be tolerated. Do not post this crap again.[/i]

go away

did he just say gyno charts?
Do they measure pu$$y power?
lugey is my new favorite member.
His posts crack me up.

-JiM

I agree with IKnowNot'ing. It doesn't take a rocket scientist to figure out just by looking at the stock air filter that it is pretty well engineered as it is! There are stock cold air scoops feeding the air filter. The filter is short, wide and faces the wind. Aftermarket air filters might give older vehicles more kick. Todays RX8s are fairly flawlessly designed by competent japanese engineers. It doesn't surprise chuck wang's garage design air filters are now having problems. I'm sure glad I didn't waste my money on that. Wang's a crook. If you want more pep, go with a mazdaspeed lightened flywheel. Afterall, if you have a Mazda dealer install it, the warranty is not void!

You obviously have no idea how the stock intake works. Filter facing the wind? Do you know that there is no ram air effect on the stock intake? Air gets sucked in by the engine. There is no wind. Mazda specifically made a guard to block off any "wind".

Who are you calling a crook? Did I rob you? Out of 60 intakes I have sold, 3 got returned because the intake causes hesitation on their cars and the buyers all got their full refund. Now I posted the info on the testing that people should do before they purchase any kind of aftermarket intake and I am a crook?

RX8 is flawlessly designed? I just got two letters from Mazda on recalls on the passenger side air bag and transmission dynamic damper.

It's funny that peope who have no knowlege have all the opinions in the world and now you recommend people to install lighten flywheel?

Chuck Huang

In regards to chuck being a crook, I wouldn't know!

Bought mine from him and he usually (I think) emails you when you buy your intake. I asked him to call me, and he did. Intake arrived faster then I expected.

I will buy from chuck again in the future.

breezy_rx8 your accusitions are unfounded, what is your proof the Chuck is a crook?

Wang is no engineer. If you feel comfortable purchasing a homemade intake with known hesitation issues, that's your call. He's selling an intake that somehow magically "cools" the air because of his aluminum "heat shield". Metal around air does not make air colder. How about on hot days. If you take a close look at the stock setup, you can see air scoops feeding the stock filter. Mazda engineers aren't stupid. They are squeezing every bit of performance out of that tiny 1.3L.

If he's giving refunds I can't call him a crook. However, it doesn't all surprise me that his homemade filter is now having issues.

The advice about the lightened flywheel comes from an experienced mazdaspeed RX-7/RX-8 mechanic.

breezy: What's the difference between the K&N and the RE?
Agreed that mazda did an awesome job on the stock intake.

But feeding the engine? I thought the engine sucked it in as chuck said.

The more you talk, the more it shows how ignorant you are.

Hesitation does not happen on every car. There have been recalls on rx-8 and if you think all rx-8 are the same, they are not. That's why it works on most but just a few cars have hesitation.

Heat shields block off the engine hot air. The air gets sucked into the engine is still coming from the fresh air duct. Remember the word, "sucked". There is no ram air effect no matter what you think. Ram air does not work with the MAF sensor. Do you know how fast air is moving into the engine? It takes time for heat transfer so even though yout think the heat shield will heat up the air, it doesn't. You also don't understand the concept of heat capcity. The plastic stock air box will be at the same temp but due to different material with different heat capcity, it might feel "cooler". On a hot day, the air sucked in will be hotter becuase the ambient temp is higher. Why don't you pop your hood and measure the temp with a pyrometer. Don't try to tell me that on a hot day, the stock air box can get cooler temp than ambient.

What's a Mazdaspeed rx-7/rx-8 mechanic? Never heard of such thing.

Why don't you get a flywheel yourself and show me some numbers. A lighten flywheel might seem lighter but you will need to use a counter weight with it. The overall decrease in rotational inertia is less than you expect. On top of that, the rpm will drop faster when you shift so unless you can shift pretty fast, you are not going to go faster. You can get more power to the wheel but how much?? Spend $400-500 on the flywheel and spend another $200-300 on labor for 2-3 HP?

About my educational background, what do you know? It shows again that people without knowedge have the most opinions and your case, assumptions in the world.

Chuck Huang

Jercs-

Well, Chuck points out his filter is smaller therefore there's more room for air. At the same time, could his smaller filter be a bottleneck? Chuck says no, that his filter is already sufficiently big enoug and that the K&N is overkill. I'm not a Renesis mechanical engineer and neither is Chuck. I tend to trust K&N over Wang as K&N has engineers design their filters. Chuck will point out the K&N filter is open to the hot engine bay. That is true. The RE filter is still within the engine bay (whether it has a "heat shield") or not and is still subject to the hot engine bay in due time.

I guess my wording was not good. It's not necessarily "feeding" air into the intake as say a turbo/super charger forces air in. But there is some air ducts that capture air directed torward the filter.

If your RE filter is working for you, I'm glad to hear.

Everyone has their own opinion controversy is inevitable. I will let everyone know after the mazdaspeed flywheel is installed. There's no gimic about the flywheel. It's all physics. Why don't they install the lightweight flywheel to start is the obvious question. Well, a heavier flywheel gives more engine momentum and therefore the engine runs smoother and more gradual. This is good for most people. For those who want max acceleration and are willing to put up with getting used to the feel of the flywheel, hands down it is the best bang for your buck.

Chuck-

Are you an engineer. Yes or No.

Hymmm.

Isn't it a coincidence that cars with no previous hesitation now have hesitation with Chuck's intake?? He can't blame Mazda for his premature filter.

Your heat shield doesn't block jack. The filter is in the engine bay whether you like it or not. I never said the stock filter will get colder than ambient temperatures. Neither will your filter! Why do you even call it a cold air filter? That's a joke!

You have never heard of an RX-7 mazdaspeed mechanic? Try going to any mazdaspeed mazda dealership and see if they have any old RX-7 expert mechanics who now work on the RX-8s.

I shall take my mechanics advice (and my engineering background) and go with a flywheel. Thanks.

A lot more people reporting hesitation with their kit. Why don't you run their kit if you trust them so much.

Like I said before, the heat shields block off the hot engine air. The cold air intake is just a term to distinquish between something that draws air from the outside (mine) or from the engine bay (K&N)

Please show us with some proof such as dynosheet that the flywheel is the best bang for the buck.

Chuck Huang

Chemist. Graduated in 1999 from UC Berkeley. Happy?

Chuck Huang

Do you know all the cars out there? You don't. Some people do have hesitation problem with everything stock. I happen to know more than you do since I do this for a living.

Heat shields don't block jack? Explain why? Without them, you can expect the air temp to incredase by at least 40F. If the ambient is 50F outside, will it be cold air coming in? It's just terminology people in this industry to distinquish two different setups. If you have a problem with it, it's just too bad.

People always want to use big word such as "engineerer" to gain respect. Not impressive at all if you still need to get advice from others. What's up with this "Wang" thing. Are you making fun of my last name? It shows again how ignorant you are. Sad.

Chuck Huang

Your heat shield is still exposed to the hot engine bay. Sure the air may be cooler initially until the engine is warm! ha.

I liked your "expert advice" in the other post to take off the air filter alltogether and drive the car in 4th gear full throttle. Ha. Your advice could ruin people's engines! I think you need a few more years of experience under your belt, son, before you make such outlandish recommendations.

Correct me if I'm wrong, but I don't believe they hire Chemists to design air intakes for the RX-8s! About the only chemical principal that applies is entropy - maybe the reason for your ingenous "heat shield". I do not claim to be an expert. I just use common sense. And I do listen to advice from experienced mechanics. Admittingly, I am a computer engineer, not a mechanical engineer or physicist. That's why I leave it up to competent Mazda mechanical engineers to design the air intake for me, not some chemist trying to make a couple extra bucks.

I am not at all against mods for the RX-8s. As long as the mods have been designed by engineers for a specific purpose. I.e. the mazdaspeed flywheel. This was designed by mazdaspeed engineers for the RX-8. The likelihood of a mazda designed mod causing engine issues is slim. And even if there are issues, I have warranty coverage - I requested by Mazda in writing.

Should I throw on your intake and screw up my engine as a result. I go to Mazda trying to claim warranty , saying "well Chuck Huang said it would be okay". They will laugh at me and say who is Chuck Huang.

Geez Breezy, chill out a little bit. If you don't like Chuck's design say so (which you already have) and then move on. Or if you are feeling really ambitious why don't you try to build one that works better.

Ok Chuck, enough said. No hard feelings. Sorry about the last name thing - people often refer to you as Wang.

im the one who started this thread about the problem with the intake. as it turns out, i was the problem because i installed it wrong...once done right, it works perfectly like everyone else who installed one.
and...CHUCK WANG is not a crook. he has a good product and deals with his customers in an honerable way.
go away
rudy

ofcourse you like your RE intake. afterall people who get conned into such gimics usually don't like to admit it. i'm sure wang is a swell businessman - a swell engineer, well that's another story. Afterall the poor man doesn't want to be sued by somebody who takes his advice to remove the air filter ("to test for hesitation") and whose engine chokes on dirt and dibris.

Enough of this nonsense.

Sigh... you really need to read some physics books before you talk to me.

The function of the heat shield is to block off the hot engine air. Of course it will be warm and so is the stock air box. Both are sitting inside the engine bay The important aspect is the source of the air. In this case, the air is coming from the fresh air duct. You want a cold air intake by placing the filter on the outside? Sorry, it's not going to work. The ram air effect will disturb the MAF signal too much. Your common sense is useless.

Computer engineer? No wonder you know nothing about physics.

Do you know people with science background has to go through all the courses such as physics and thermodyamics? I happened to manufacture parts for RX-7 for more than 6 years. Ask your mechanic to make some parts for you if you like their advice so much. Maybe they have a higher educational background and they can explain the theories to you better. I doubt it.

The only way you can test out the hesitation is when the car is on load. You can do it on the dyno if you don't feel safe.

The bottom line is, you are just plainly ignorant and I feel sorry for you. The more you talk, the more it shows you have no idea what you are talking about.

Chuck Huang

How much dirt can get into your engine by doing one run? Take off your stock air filter and see how clean it is. If you don't feel safe, do the test on the freaking dyno but I think you are too cheap to do so anyways.

I think I know who you are now. You sound just like Compaddicts. He happened to sell computer parts too. lol :D Same old illogical statements with same kind of attitude.

Chuck Huang

Sorry Rudy. Last name is Huang. :) I really have no idea where the "Wang" is coming from.

Don't worry about him. I am 99% sure he is Compaddict who has been giving me crap since day one.

Chuck Huang

Wang, I can go all day. I tried to give it a rest, but you're just not satisfied yet..

The bottom line, you're an incompetent chemist who knows nothing about how to design this air filter. Your parts are failing like crazy 3 out of 60 is just those who bother to complain. 3 out of 60 is already a ridiculous number!

Your heat shield isn't blocking any more hot air than the stock intake. My common sense has gone a long way. Obviously yours has not. I do give you credit for conning people out of their hard earned cash though!

I'll challenge you to a physics battle any time, bring it on wang. We chip designers have quite a bit of physics background. Wow, you have designed the same CRAP for RX-7s for 6 years. Any jackass can claim to design parts for x number of years. But I don't see the name MAZDA stamped onto any of your products. I see the ametueur, homemade riduculous looking sorry excuse for an air intake "designed professionally by chuck wang himself".

Ha ha. LMAO.

Also, about getting dirt in the intake. Any moron with a hare of common sense knows it's not a wise idea to take off the air filter for ANY PERIOD OF TIME! I'm not cheap at all. I chose to spend my money wisely. Any your products are not a wise choice!

Computer engineer, jackass, not computer salesman. Big difference. Kind of like you. There's competent mechanical engineers and then there's you - incompetent maggot with a chemistry book who thinks he's the next Dale Earnhardt Jr.

Your main issue with Chuck's design seems to be the use of a heat shield, and you say you trust K&N's engineering. In case you didn't know, K&N has now started using a heat shield in their own product to address hesitation at slow speeds. You can see their heat sheild right here...

https://www.rx8club.com/showthread.p...threadid=22349

So it seems that the heat shield is indeed important, and that Chuck had the right idea in the first place. Where does all your negativity towards Chuck and his products come from? Many people are happy with his intake. Maybe you should do some actual research before badmouthing someone's design and then questioning his qualifications.

Sorry to disappint you. The parts are not failing but the car is. Like I said, all parts are made uniformly. It works on majority of cars. 95% out there so far. Check with Mazda and see how many cars already been on recall.

I am so incomponent that I happen to have knowledge myself without outside help. So I have to challage your chip designer, not your directly? Why don't you chanllege my professor at UC Berkeley who happens to be a Nobel Prize winner?

I never said the shileds will block off more hot air than the stock intake. I said it will block off hot air coming into the intake vs. an total open filter such as the old style K&N Typhoon.

I don't see any Mazda logo stampped on any aftermarket parts. Name one? Mazdaspeed? Mazdaspeed is Mazda. Do you see Mazda logo stampped on HKS, Greddy, Blitz, RE Amemiya parts??

You know you are cheap. You never do your own R&D and all you do is criticize other people's product and best of all, you have no knowledge at all.

Taking off the filter is not a good idea but one run will not do any damage. The stock air duct is complete shielded. Take off your front bumper and see it yourself. If you don't want to purchase the intake and find out the hardway, it's the cheapest way for you to find out if an aftermarket intake will work or not. My advice was only trying to save people the hassle and money. What do I gain from that?

I never claimed anything. Where is that Dale Earnhardt Jr. thing coming from? Another assumption from you? You the one who asked me if I am an engineer. I never want to use my educational background to prove anything but since you asked, I just told you.

I feel really sorry for you. Calling me names does not prove anything. Only ignorant people will use name calling to bring someone down. And only people who have nothing to offer will use name calling as a weapon.

So you are indeed Compaddict? It's sad that someone will need to alias and hide behind a computer so they can do all the BS talking. Sad. Sad. My advice for you is to get a life and go see a doctor.

Chuck Huang

sorry chuck...Huang...
this guy is a dick and should go away. Lets all ignore this guy.
i love my intake and recommend it to anyone.
ILL REPEAT FOR ALL INTERESTED...MY INTAKE WORKS PERFECT WITH NO HESIATION SINCE I CORRECTED MY POOR INSTALLATION.
Instead of posting this thread, i should have called you first to consult you about how i installed it. thanks chuck.

Are you two guys done yet??

Just a couple of general questions about intakes.

So why do some companies say ram intake or just intake and others call theirs a cold air intake?? And which is the quietest(is that a word?) other than stock?? I've heard the K&N and that suckers annoyingly loud.

Ok folks, that's enough of this. breezy_rx8, if you feel the need to continue this "discussion" with Mr. Huang, you can TAKE IT UP IN PRIVATE. Trading insults does no one any good. Thread Closed.

Casual, please ask your questions in this thread which is all about intakes. Thanks.