I now have a Racing Beat exhaust on my rx8(04,GT,MT). I am going to get a Cold Air Intake very soon. I wonder which intake should i go for among the following choices:

1) mazdaspeed CAI

2) AEM CAI

3) RB REVi

4) K&N short ram

For now, I'd probably go for "Mazdaspeed" and my" RB exhaust". Is this a good combination?

Please give me some advices!!!

:)

well, the aem and the mazdaspeed are the same thing. just different labels on them.

the k&n is not a cold air, hence the short ram

the rb is only cold air when you add the ram air piece to it

personally i have the aem, love the sound.

dont expect to make much horsepower from any of these.

rb is cold air, even without the ram air part. It doesn't suck air from the engine bay. So even the stock intake counts as such.

I currently have the K&N ver 2, I got it mainly because of the carb sticker... there's a slight increase in sound but doesn't necessarily equal to horsepower increase, but if it did I'm sure it's not that much.
If I were you, since you already have the RB exhaust, might as well stick to RB and get their intake+duct, just my $.02

Not sure what you are looking for. AEM/MS is quite a bit louder than the RB unit. I have the RB unit & really like it.

I currently have the K&N ver 2, I got it mainly because of the carb sticker... there's a slight increase in sound but doesn't necessarily equal to horsepower increase, but if it did I'm sure it's not that much.

check out the dyno charts from the open intakes (HKS posted dyno sheets). You'll lose power this way.

I have the Revi and air duct... I am very happy with mine for sound and better engine response.

I'd like to say a "thank you" to everyone who's sharing his experience with me here!

according to you guys, the AEM and MS CAI are the loudest ones. Since I want my 8 to be a little loud, I will probably go for one of these.

However, my concern is actually the fact that i already have the RB exhaust. should i get the REVi because they are the same brand, so this combination would work the best? I am thinking that when the RB guys design the REVi, they may try to match the intake with the their own exhuast. Am I right?

The question boils down to : do the "intake" and " exhuast" work indpendently or they slightly influence each other? so, when I decide which intake to buy, how much do i need to consider my RB exhaust?

They are independant.....

Racing beat designed both systems not to be obnoxiously loud.... Which is why I like mine.

I am kinda skeptical of this... Maybe a sales ploy to make us want to fork out the $650???

The only reason I am doubting this is because the difference in a intake from car to car should not net more gains just due to the fact that it is enclosed. In fact the HKS isnt completely enclosed, its open at the top. I find it hard to believe that this would yield any more power than the MS/AEM that is placed right behind the front grill where air is being rammed into.

check out the dyno charts from the open intakes (HKS posted dyno sheets). You'll lose power this way.

I am kinda skeptical of this... Maybe a sales ploy to make us want to fork out the $650???

The only reason I am doubting this is because the difference in a intake from car to car should not net more gains just due to the fact that it is enclosed. In fact the HKS isnt completely enclosed, its open at the top. I find it hard to believe that this would yield any more power than the MS/AEM that is placed right behind the front grill where air is being rammed into.

They tested the stock intake, a fully open intake, an intake that is partially open, etc.

And they showed one that was partially open allowed the most air, while keeping the intake temps down. But the gains were similar to that one of that was fully enclosed. The only one that suffered was the completely open intake.

As we already know, the gains from the intakes are minimal. So I would never recommend $650

The reason I brought this up is because the results show that a fully open intake is a step down from even the OEM box = dumb move.

you're never gonna get a straight answer because everyone is gonna tell you to get what they have on their car..... I say AEM/MS or REVi w/ Duct

The reason I brought this up is because the results show that a fully open intake is a step down from even the OEM box = dumb move.

Not true if you add the RB ram (or other) to the K&N. W/o a ram you are just going to suck up hot air. It has no way to really get freash air. With a ram it is the more or less the same as a cold air intake.

Not true if you add the RB ram (or other) to the K&N. W/o a ram you are just going to suck up hot air. It has no way to really get freash air. With a ram it is the more or less the same as a cold air intake.

The revi and the stock intake both fit up to the front bumper and suck air from the area in front of the engine bay. they do not suck hot air from the bay like the K&N system does.

CAI doesn't mean the intake must be physically in the air stream. So the ram air add-on isn't required for a CAI.

Cold Air Intake=taking in air from outside rather than from the hotter engine bay. This is a good idea. That is why our stock airbox is a cold air intake already. That is why I like the stock intake best.

Ram Air=using the dynamic pressure from the relative velocity of the car moving through the air to try and force more air into the engine. There is some debate around the effectiveness of this and what gains there are from it. That is probably why our car does not come with it stock.

In my opinion the best combination is the stock airbox with the RB ram air duct. Just so I can say I fiddled with my intake.:)

I Have A Friend Who Has The Rb Exhaust And The Revi Intake- I Personally Dont Like The Sound- If You're Looking For Great Sound- I Would Go With The K&n , But Make Sure Its The Version 2- I Would Not Recommed The Ms Or Aem Because On A Rainy Day, It Could Cost You Your Engine Due To The Position Of The Filter Below In The Car

It Could Cost You Your Engine Due To The Position Of The Filter Below In The Car

That is one of the biggest things that stops me from getting the AEM/MS.......how bad is it? a normal rainy day would result a failure of the engine?

The revi and the stock intake both fit up to the front bumper and suck air from the area in front of the engine bay. they do not suck hot air from the bay like the K&N system does.

CAI doesn't mean the intake must be physically in the air stream. So the ram air add-on isn't required for a CAI.

I dont know where you are going with this. My point was if you have a K&N v2 it's going to suck up hot air. You put a ram of some sort on the car that forces outside air into the engine bay, inches away from the filter you are not going to suck up hot air. The temps I read right off the filter and the maf are the same deg (give or take 1) as the outside air. Yes I still suck up hot air at a stop light, but even at 5mph the temps drop a huge amount.

I wouldnt worry about that. The only issue you would have is if you completely submerged the filter in water. I have had CAI on all of my cars, some slammed with coilovers and never had any issues.

If the weather is the worst, drive in the middle lane, but that is what I do regardless.

That is one of the biggest things that stops me from getting the AEM/MS.......how bad is it? a normal rainy day would result a failure of the engine?

"Sucking enough water to crack the motor" is kind of an auto/urban legend, comes up every now and then that "....my cousins/friends/hairdressers brother went thru this deep puddle...."

Don't lose any sleep over it.

S

I dont know where you are going with this. My point was if you have a K&N v2 it's going to suck up hot air. You put a ram of some sort on the car that forces outside air into the engine bay, inches away from the filter you are not going to suck up hot air. The temps I read right off the filter and the maf are the same deg (give or take 1) as the outside air. Yes I still suck up hot air at a stop light, but even at 5mph the temps drop a huge amount.

You will get hot air when the car isn't moving. That air may cool down once you start moving, but it helped heat soak your engine, which doesn't go away instantly.



"Sucking enough water to crack the motor" is kind of an auto/urban legend, comes up every now and then that "....my cousins/friends/hairdressers brother went thru this deep puddle...."

Some of us intentionally pour water into the engine in order to clean out the carbon. Water into your intake isn't going to kill the engine. It'll help steam it clean though.

You will get hot air when the car isn't moving. That air may cool down once you start moving, but it helped heat soak your engine, which doesn't go away instantly.


If you think the heat soak is bad from a K&Nv2 sitting at a stop light. Then the Greddy turbo guys (or any under the hood filter turbo)must have it really bad. Sucking under the hood air up and not moving so the intercooler isnt working. Might even be blocking the radiator enough to slow its cooling. Most likly putting off more heat then a N/A motor, thats gotta be great.

If you think the heat soak is bad from a K&Nv2 sitting at a stop light. Then the Greddy turbo guys (or any under the hood filter turbo)must have it really bad. Sucking under the hood air up and not moving so the intercooler isnt working. Might even be blocking the radiator enough to slow its cooling. Most likly putting off more heat then a N/A motor, thats gotta be great.

That's one of the ways how you can tell someone is really looking at making the car run well, vs those who just want a turbo slapped on. Most of us who are serious about it, immediately change the greddy intake out and route a pipe through the bumper. Mazsport even makes a kit for this exact purpose.

I Have A Friend Who Has The Rb Exhaust And The Revi Intake- I Personally Dont Like The Sound- If You're Looking For Great Sound- I Would Go With The K&n , But Make Sure Its The Version 2- I Would Not Recommed The Ms Or Aem Because On A Rainy Day, It Could Cost You Your Engine Due To The Position Of The Filter Below In The Car



Thats actually completely wrong, in order for there to be an engine problem, that means the filter has to be completely submerged. that means you would have to drive in 2 ft of water or more, but you would be an idiot to do that....I drove through what seemed like a hurricane, and when i pulled into my garage, filter was fairly dry...

That is one of the biggest things that stops me from getting the AEM/MS.......how bad is it? a normal rainy day would result a failure of the engine?

NO NOT JUST A RAINY DAY , BUT IF IT RAINS A LOT , WATER ACCUMULATES ON THE SIDE OF THE ROAD, AND WHEN YOU DRIVE BY THE WATER YOUR INTAKE IS SUCKING "AIR" GUESS WHAT ITS GONNA SUCK TOO- WATER - AND THATS GONNA DESTROY YOUR ENGINE

^ As has already been said, water in your engine doesn't damage it.

That's one of the ways how you can tell someone is really looking at making the car run well, vs those who just want a turbo slapped on. Most of us who are serious about it, immediately change the greddy intake out and route a pipe through the bumper. Mazsport even makes a kit for this exact purpose.

Yes, I know this, but out of the small amount of people with a turbo system, most have it out of the box. The real people serious about turbos, wouldnt bolt a greddy kit to their car.

I see no point in going on anymore. I have a K&Nv2 I've put my car on the dyno with it and other mods and made great numbers. We could fight for days about air temp, Alt,stock Vs K&N and so on so I'm not going to post number. It worked for me, I didnt lose power, I didnt, "not make power". So whats left for it to do?

I will no longer talk about my car, because people that dont have parts or have tested them are going to tell me I'm wrong some how. Like always someone will come and try to discredit my proof, cause of what they think or heard.

There is just no telling this guy.

He can be our forum expert on driving in the rain - he obviously knows WAY more than anyone else.

I had no idea water could accumulate along the road.......

S

It not uncommon to find knee deep water on the sides of the roads in South Fl

It not uncommon to find knee deep water on the sides of the roads in South Fl

+1
Especially this time of the year. But it sure don't destroy engines, nor it gets sucked into my intake, even having it where it is.

This is more of an issue for piston engines.

NO NOT JUST A RAINY DAY , BUT IF IT RAINS A LOT , WATER ACCUMULATES ON THE SIDE OF THE ROAD, AND WHEN YOU DRIVE BY THE WATER YOUR INTAKE IS SUCKING "AIR" GUESS WHAT ITS GONNA SUCK TOO- WATER - AND THATS GONNA DESTROY YOUR ENGINE

I wouldnt say serious turbo people skip the Greddy. Things play are part in this like finances, some dont feel the need to have 1 billion whp for a daily driver and just an extra little boost.

Yes, I know this, but out of the small amount of people with a turbo system, most have it out of the box. The real people serious about turbos, wouldnt bolt a greddy kit to their car.

I had the K&N Typhoon short ram intake for one day. Turns your car into a pissed off 150db weedeater. Way too loud, no power gain or throttle response gain. Easy install though, even easier to take off and put your stock Intake back on while waiting for your RB REVi intake to arrive:)

There is just no telling this guy.

He can be our forum expert on driving in the rain - he obviously knows WAY more than anyone else.

I had no idea water could accumulate along the road.......

S

i dont know more than anybody else but i know that in summer - rains almost everyday in south fl , and water is a big issue with cai's - at least with piston engines. im not going to take the risk with my 8 - i already blew my 350's engine like that

I have the Mazdaspeed. I drive in the rain. My engine runs equally as strong in the rain as it does when it's a nice not humid day, or any day for that matter.

I had the K&N Typhoon short ram intake for one day. Turns your car into a pissed off 150db weedeater. Way too loud, no power gain or throttle response gain. Easy install though, even easier to take off and put your stock Intake back on while waiting for your RB REVi intake to arrive:)

HAHAHA So your butt dyno told you to spend more money on an intake that offers less gains? Even RB will confirm that.

edit, and your talking about "Way to loud" so your getting a Borla?

Yes, I know this, but out of the small amount of people with a turbo system, most have it out of the box. The real people serious about turbos, wouldnt bolt a greddy kit to their car.

I see no point in going on anymore. I have a K&Nv2 I've put my car on the dyno with it and other mods and made great numbers. We could fight for days about air temp, Alt,stock Vs K&N and so on so I'm not going to post number. It worked for me, I didnt lose power, I didnt, "not make power". So whats left for it to do?

I will no longer talk about my car, because people that dont have parts or have tested them are going to tell me I'm wrong some how. Like always someone will come and try to discredit my proof, cause of what they think or heard.

Where are your dyno results? What about your temp. readings? Link to post? I've also got the K&N v.2 with RB duct, and I'm interested in seeing what you achieved with your setup.

Yes, I know this, but out of the small amount of people with a turbo system, most have it out of the box. The real people serious about turbos, wouldnt bolt a greddy kit to their car.

We've got ourselves a comedian here :)

As it currently stands, the greddy kit makes roughly 35-25 whp less than even the most expensive turbo kit available for the RX-8. It also makes much more torque and whp than any supercharger kit available for the RX-8, AND it costs half as much as anything else out there.

Do you know what a turbo kit consists of? Slap on a slightly larger garrett turbo and the power levels are the same (plus you can lower the boost levels). There's nothing wrong with the greddy kit. It's not like the alumnium pipes are sub par. Just replace the hoses ($100) and you're done. It's also the *only* kit for the RX-8 that has no CELs. Add to it that it's the most widely used kit on our car, so there's a lot of support available by other members.

I'd like to hear more on your theory as to why Greddy equates to being not serious.

HAHAHA So your butt dyno told you to spend more money on an intake that offers less gains? Even RB will confirm that.

edit, and your talking about "Way to loud" so your getting a Borla?

Actually my wife bought the intake for me for my birthday a few days ago and I had just been shopping the Borla because I was very happy with them on my WS-6 but at the time of my signature I had not heard a sound byte of a borla on an 8. So since then yes I have changed my mind and the MS exhaust system goes on tomorrow.

Thank you though for your positive input, I will be sure to change my signature for you also so there is no other confusion.

We've got ourselves a comedian here :)

As it currently stands, the greddy kit makes roughly 35-25 whp less than even the most expensive turbo kit available for the RX-8. It also makes much more torque and whp than any supercharger kit available for the RX-8, AND it costs half as much as anything else out there.

Do you know what a turbo kit consists of? Slap on a slightly larger garrett turbo and the power levels are the same (plus you can lower the boost levels). There's nothing wrong with the greddy kit. It's not like the alumnium pipes are sub par. Just replace the hoses ($100) and you're done. It's also the *only* kit for the RX-8 that has no CELs. Add to it that it's the most widely used kit on our car, so there's a lot of support available by other members.

I'd like to hear more on your theory as to why Greddy equates to being not serious.

Naw I'm no comedian, you have just tried to 1 up me on everything I have said in thread with something off topic so i keep going back at it with you. Trust me I know how turbos work, I had a 4g63 AWD eclipse running low 12's about 10 years ago and a mustang under a tarp in the back yard that puts down over 900whp (little over 1100ish HP back when my dad was racing it).
Yes I know what a turbo kit consist of and it's not worth posting anymore cause we will just go back and forth. You have a greddy kit and you got a good amount of power out of it for a good amount of money. You could put more money into to it to get into the area of the Mazsport kits, that seem to only be limited by the motor.

I've seen your Dyno comparison for the RX-8 (turbo, supercharger, etc) thread. How many many dynos do you have from each kit to make that chart?

Actually my wife bought the intake for me for my birthday a few days ago and I had just been shopping the Borla because I was very happy with them on my WS-6 but at the time of my signature I had not heard a sound byte of a borla on an 8. So since then yes I have changed my mind and the MS exhaust system goes on tomorrow.

Thank you though for your positive input, I will be sure to change my signature for you also so there is no other confusion.

You said "Turns your car into a pissed off 150db weedeater" then you have the balls to say "Thank you though for your positive input" because I read your Sig?

You also said "no power gain or throttle response gain" based off NO facts. Then you try to call me out? "Thank you though for your positive input"? You flat out told everyone in this thread the K&N offers "no power gain or throttle response gain" you can't prove that.

Hell the K&N would of given you more whp then the dual can easy. What do I know right? People are always telling me they love the sound of my car, they must just be saying that for positive support.

You said "Turns your car into a pissed off 150db weedeater" then you have the balls to say "Thank you though for your positive input" because I read your Sig?

You also said "no power gain or throttle response gain" based off NO facts. Then you try to call me out? "Thank you though for your positive input"? You flat out told everyone in this thread the K&N offers "no power gain or throttle response gain" you can't prove that.

Hell the K&N would of given you more whp then the dual can easy. What do I know right? People are always telling me they love the sound of my car, they must just be saying that for positive support.

The only proof I needed was driving it with the K&N on.