SayNoToPistons

iTrader: (8)

+ 3255253^241234

the3siman

Literally just bought my RX-8 and just joined this forum. Its a bone stock 2004; black and just got the windows tinted before I left for deployment. Ive been looking heavily into intakes as the first upgrade and I love the sound of the engine and would like to emphasize that a little more with an intake. I dont want obnoxious noise but something that louder then stock. The RB Revi with the duct is what Ive been looking at, is there any other one that produces a good tone? Any advice is appreciated.

TeamRX8

iTrader: (25)

The best advise is for you to try reading the thread you posted in

dakuba

RB and RE .

ReV2ReD

So from my mere two hours of research, i can deduce that any aftermarket system is kind of pointless (except for Lasse's potential inlet) unless your looking for bling and noise. I dont care about either of these, just improvements.

I'll be keeping the stock box and filter then, but would there be much value to adding the REVi duct to the stock filter and box? What about removing one of the mesh diffusers before the MAF? Would there be any gain to smoothing out the inside of the air box too?

RayX8_1014

anyone have any thoughts on this ebay intake

im thinking of buying it, it looks kinda like an aem replica but im a little iffy on it

im always trying to save a buck

and if do get it should i also get an intake bypass?

HiFlite999

iTrader: (2)

Conventional wisdom is that there is some advantage to the REVi duct over the stock VFAD. A downside is that it blocks some of the airflow to the radiator which can be a problem in hot climates or on the track. Removing the most forward mesh is most likely ok (and gains a couple of hp) with the stock intake, as is removing the screwed-on baffle plates within the airbox itself. Smoothing the inside though may have negative effects - the box walls are very stiff to make it a good Helmholz resonator. CW is also to stay with the stock air filter element in dusty climates - the aftermarket ones do not filter as well.

RayX8_1014

thanx brah lol

stinksause

iTrader: (5)

i may buy it to see how it is

Mikeyrx894

i was looking for a intake for an rx8 which one you guys recomend ???

WingleBeast

how about you take the time to read the last 9 pages. But to cut to the chase the stock intake is perfect except for the rough castings on the inside of the upper intake manifold. To fix it, take your air filter off, leave the MAF on and have a friend turn on the car and rev it up to about 7000 RPM. While hes doing this take silica sand and pour it into the MAF. The sand will smooth out the intake no problem. It's good for about 34.9whp

Junkman 6394226

Stock air intake (as a whole) is the best, because the size and length of the intake piping indueces optimal air speed and volume into the engine across 3-5 different RPM bands. Unless you have a standalone that can adjust port timing, expect -30 to +5 horses from any intake.

Guess which gets the +5?

ASH8

Factory OEM...go an look at the latest M Tip I posted today..

OE is the BEST.

RayX8_1014

just picked up the RB revi with the duct and its awesome. sounds great too.
screw the wbay kit lol!

Dillion Phelps

so questions.
Stock 2004 RX8's use Short Ram Intake?
If you put Ram Intake on you would have to have a modified hood?
What will push the most horse power out of a 13b with just an intake mod?
Which is most cost effective?

9krpmrx8

iTrader: (46)

The stock intake is a cold air intake and it is the most cost effective and is your best bet. Don't waste your money on an intake.

Dillion Phelps

Alright thanks. I'll probably end up getting an AEM cold air to create more space under the hood. But it's good to know what i actually have

5p3nc3

I have the AEM and it does nothing perormance wise. Does however make alot of intake noise, frees up some space in the engine bay and looks pretty.

gwilliams6

I have the Mazdaspeed/AEM intake and I get up to 5hp more at the crank. There is a definite performance boost. It is just physics. For every 10 degrees cooler intake temp you will see one hp more in a Renesis engine. Hey 5p3nc3 if you aren't getting anything performance wise you might have it installed and set up incorrectly. The Mazdaspeed/AEM intake is one of the few intakes that WILL make you a few hp in a Renesis engine. I have had years of experience with various intakes on my seven rotary cars and the Mazdaspeed/AEM is worth the reasonable price.

5p3nc3

5hp at the crank would bearly make a noticeable difference at the wheels. I cant really justify taking my car to the dyno for such a small increase which could be influenced by the conditions on the day, ie if its hot, cold raining etc. I wont deny that that cooler intake air = more power but as its been discussed on numerous occasions, the stock system is pretty well designed.

paimon.soror

iTrader: (15)

wise man

clemson89

hey guys, I saw some pics of other peoples 8s with the cai and it looked like y could see them through the grill, are those modified grills because I can't really see through mine.

gwilliams6

I meant 5hp more at the wheels, verified on a dyno . And you are right, even with a CAI the hp change will vary depending on barometric pressure and ambient air temp to start with. Not knocking the stock system , it is a fine system, but I was looking for a little bump in hp that was reliable and safe for the Renesis engine. And I got that bump with the Mazdaspeed/AEM CAI. The difference is completely noticeable. I have owned street and track FI rotaries and NA rotaries, rotaries with CAI and free flow racing exhaust systems. I got another little hp bump with the BHR ignition kit and racing Nippon Denso spark plugs. My next stop for a little extra hp will be the new BHR exhaust system under testing by Charles right now on Pistonhater's RX8 in Arizona.