yeah, i bought it soley for the sound, I guess ill get a revi duct then just something else for me to mess with on my car. I like working on these cars alot.

 

lol, me too...I always enjoy quality time with my 8 in my garage installing new stuff

 

i always lift my hood and find something to do when i'm bored

 

^haha me 2

 

for the rotary im hearing a lot of things from mazda techs that ram air, like the rx8 intake is, is best for a rotary, but like everyone is saying, it wont make a huge difference, when a company says they gain x amount of power, its spread around the entire power/torque curve of the car. injen says you gain 21hp, but if you look at the dyno chart and max power, you gain 11 roughly, dont get me wrong its great as far as this car goes, but thats only just the intake, if you get an exhaust, headers and everything else to make the car breathe easier....you might see 21+. i bought this intake because ive always trusted injen, once the weather gets better i'll be dynoing my car ASAP. i talked to a mazda tech at modernmotors who used to race 3rd gen rx7's and he said he used ram air because of the way the rotary is and the faster you go...the more air gets into your intake and into your engine at those higher rpms which makes your engine feel like you have a bit more power at the high rpm

 

http://www.injen.com/Galleries/Produ..._6080_6_03.pdf

 

and like 05rex8 said....the duct is the best thing you can get.

 

duct it is then with my typhoon, ill get the headers after i get my severance pay

 

Ok so I am kinda new to the RX8, bought it before I deployed, so I only had it for about 5 months and then left for Iraq, Im comin back in about 7 weeks and want to do a few things to my car. With the intake, will it mess it up if I just have the cone, just the air filter itself, take off the top part of the air box, and just hook that cone straight up to the air box? Will that mess it up at all or cause any damage down the road?

 

i dont see why it would damage the car. the stock intake is a ram air, so you'd probably not be helping it too much, some of the air would escape thru the hole youd be cutting or the hot air from the engine bay would flow into the intake box and it probably wont help that much. the main restrictive part of the stock intake based on my own deduction was the duct underneath the front facia. when you open up ur hood you have a plastic air diversion panel, pull that off....the plastic screws will probably break...and you'll see a cloth tube thing, it'll come out of the frame and flow to the right side of the car, while there is a little duct on the left, i took it off and bought the racingbeat revi duct, i have yet to put it on but that'll be the best, but i wouldnt cut up that intake box, a ram air and the duct will be your best bet. if you get a cold air, you'll gain hp and torque near the midrange of the curve but not much high end, and for the rotary, its at its best near high end, so the faster u go, the faster the air goes into the intake and into the engine, the more power at the higher rpm, i was told that by a mazda tech who used to race rotaries for about 12-13yrs, i believe him anyway.

 

The stock intake is a cold air intake. So is the Racing Beat setup, ram air duct or not.

 

i thought cai's went to the bottom of the engine bay to pick up the cooler heavier air near the road, i think they call the racing beat set up an cold air box where its kinda best of both worlds, but tahts what i was always told and thought unless im not being told something, id love to know, itd help me out.

 

without a duct, if you install the racing beat intake it is very much not a cold air intake.

I really need to rig up a duct.. sick of pulling hot engine air in, I can see it in the data logs.

 

^^same previous mod.

minus the RB duct now, put back the vfad( don't like all the dust with a k&n drop-in) and made air openings under the bumper where the bumper support is...

don't waste ur time... an exhaust is more worth ur money on blowing. (of course i say that, and mine was free =) )

 

not too much gains from both so you might as well get the one that sounds good and looks good

 

true, but minus points for the metal maf tube...

 

I've had both the K&N SRI and now the MS/AEM CAI and can honestly say through much data logging with the AP that the CAI is better.

Here was my justification to myself when I switched from the K&N to the AEM.

K&N SRI Pros - Increased throttle response, added high rpm HP (not much, but it was there).
K&N SRI Cons - too loud (imo), high IAT, AP tunes were too rich (my tunes came from Jeff (MM)).

MS/AEM CAI Pros - Increased throttle response, mid range tq feels stronger, AP tunes make my 8 feel stronger all around the power band, not as loud but still aggressive, IAT is never above 20 degrees AMB.
MS/ AEM CAI Cons - Rain/ Snow/ touchless car washes can be a problem (not for me yet), filter can be harder to clean/ remove.

This is just my.02. After owning both I will take the CAI hands down.

 

You aren't pulling in hot engine bay as as the inlet to the airbox is outside of the engine bay. What you are seeing is basically the airbox itself getting heat soaked from the radiator fans blowing hot air across it. I've always thought a good mod to it or any other airbox type of system in the engine bays of cars would be to insulate them on the lower outside. I'd try to fab something up and then see what your logs say. Even a few simple layers of tinfoil on the bottom may do something. That would be cheap and easy to try.

 

Which one besides stock doesn't have a metal maf tube?

 

on that same point, go all out and get it all ceramic coated

 

none.

but thats my point.

i'm running the stock box RG, what to you think? good enough, right?

and yeah, heat insulant on the bottom plate, though we already have one there. maybe tilted diagonally would be better for airflow across the radiator... something can be done there, i just don't know it yet.

have you already altered brackets or otherwise for the bottom plate below the airbox?

 

ceramic is heavy though

 

^Not porcelain ceramic

 

When Speedsource Racing was running factory based RX-8s using stock internal Renesis engines, they tried a number of different intakes. In the end they raced with the stock airboxes and even the stock paper filters! All they did was insulate the bottoms. Their cars put down right at 230 rwhp.

 

heheeh porcelain for the win! LOL