Return it, save your money for a midpipe or AccessPort with tune.

 

Since 04Green brought up installation, i would say the hardest part of an aftermarket intake installation is removing the stock airbox and intake. And still, that isn't saying a lot, it's pretty easy.

 

i wouldnt waste the money on a rb intake box, just get a filter, do the box mod, and a rb duct.

 

The gains from the RB are documented unlike most other intake systems. The stock box mod doesn't do jack ****.

 

Dyno results. MAF data would be good I guess, if the test vehicle is on a stock tune that is. and of course if the dyno runs were done back to back.

 

Never had the RB intake with duct combo, but I can vouch for the AEM/MS CAI.

I have had mine on for years and my IAT is never more than ~20 degrees above ambient.

 

We (SARX) all sat in traffic idling waiting to get into a big event last Saturday and we all saw IAT's in the 150F range when ambient temps were around 90F. Two of the cars had AEM/MS intakes and were right at 150F with me (turbo) and the highest was 165F+ in a stock (engine wise) R3. One had the RB but he got separated from us so I wasn't able to see what his IAT's were. I wish I could have.

 

I guess living in the desert would cause that. I lived in Palm Springs, CA (grew up there) and it would be anywhere between 100 and 115 during the summer.

When I drove my 8 from CA to DC it was 112 one day, but I didn't check my IAT to see what it was. Couldn't be any cooler that 112 and am sure it was way higher...

Cold air is hard to come by in high heat

 

Yeah when moving on the highway it's not an issue but at low speeds in traffic and idle it is. Heat soak is a bitch.

 

Hay guys... Chiming in.. on the intakes... I have had the following...

Stock
AEM CAI
RB Duct and intake kit.
Stock with RB Duct K&N Filter
Stock with RB Duct Baffles removed K&N Filter
Stock with RB Duct Baffles removed and Screens removed K&N Filter
Stock with RB Duct Baffles, Screens Removed K&N Filter and Duct cone thing i fiberglassed up.

AEM or RB WITH THE DUCT is by far the best method.. All the stock variations where ok. and the the intake cone I fabricated was ok.. It worked better than stock in higher RPM 4-5k range seemed a bit more responsive over stock but that was it. the AEM and RB feels much more responsive over that as well. in making that cone the result is not really worth the labor.
but it was a fun little project and it was nice to test out the idea i had.

https://www.rx8club.com/do-yourself-...x-cone-234097/

I am currently on the RB with duct and its simple and an easy way to go that provides honest results... Does anybody have any independently done test results on the SR motorsports intake??

 

I seem to recall a thread that I think you posted in where a guy did back to back dyno tests on the same day of the stock, Injen, and Racing Beat. The Racing beat made about 10+WHP more than the Injen and stock IIRC. And yeah I agree on the MAF readings, I am certain you would see and increase (or decrease) in the G/S when doing an intake swap and back to back dyno runs on the same day, under the same conditions.

 

Same old results as any other intake thread..... if you're looking for power increase then there are better things to put your money towards. Certain intakes may delay heat soak but if your in traffic long enough your gonna see high temps regardless

 

Yeah we found out the factory intake temp reading maxes out at 170F. My buddies car got to 170F and never above and that was with a stock engine and airbox.

 

Go with the AEM or Mazdaspeed CAI (actually the same piece) . I have had a Mazdaspeed CAI in both my 2008 40th Anniversary RX8 and my 2008 Mazdaspeed 3 GT and both have been bulletproof. A performance improvement with better breathing and denser air. I have owned seven rotary Mazdas since 1973 and several have had CAIs. The AEM and Mazdaspeed model has been the easiest to set up correctly and a completely troublefree CAI. If you can still find the Mazdaspeed version (and they are getting hard to find) you will get a Mazda warranty. But even if you go with the AEM, they are so reliable and easy on your engine, you should have no problems. Enjoy !

 

I just put my smelly old work sock in the end of the maf accordion. It's the ultimate intake here's my dyno proof

 

Holy crap! Is that work sock setup a Brettspeed beta project. That setup has totally gotten rid of the SSV and APV dips in the HP curve

 

If you're set on getting a cold air intake, do NOT get anything other than Racing Beat's, AEM's, or Mazdaspeed's intakes. Everything else is a complete rip off and you will LOSE hp and mpg. The stock air box is already really good so you won't gain much at all, but I would recommend getting the AEM or Mazdaspeed intake. The AEM and Mazdaspeed intakes are actually the EXACT same thing so It's up to company preference/what deals you can find online. I personally went with the AEM intake just because amazon had it for $300 plus FREE one day shipping. It's funny, even the AEM intakes have Mazdaspeed engraved in one of the tubes.

 

Brettspeed had input into the work sock setup but it will be sold under the "Slidespeed" brand. I just bought all new work socks so I will have approx 10 Sock intakes up for sale on a group buy very soon, as long as they all pass my quality control tests of course ( not too many holes, not too thin ect)