Brettus

iTrader: (2)

LOL - just edited my post before your one came up

CKay

I think you could even get 25-30 hp with all the mods fanman listed, the hi flow cat from RP adds 10hp, i havent got it dynod since the super cat but you can really feel it, everyone thats rode in my car can even feel it.

rowteree

thanks for all the replys guys

Trekk

I have a problem with every intake I look at.
Stock airbox is ok, but if you really look at, the filter sits really far forword. The oval on the air box has two tap/flap things that stick out for some reason. Nothing inside is smooth. The box looks like it was built to get air directly from the oval. So why is the box so big and heavy? I dont know if it takes advantage of the entire box.
The RB has the bell that sticks out far like stock, I dont see how ramming air into the box would help a great deal unless it can use the air as fast as it is comming in. On the stock box you can atleast force air strait down the pipe.

This is what I see atleast when I look at them. Look at how a vacume works. They are almost always a triangle shape towards the suction. I wonder how hard it would be to suck up a pile of dirt if you hooked the shopvac to the stock airbox and stuck it in a pile of dirt. Would you get to much turbulence? Maybe I'm just crazy.

I think SR had the right idea, but he should of made the intake mount crooked so he could put the oval inlet right in the center.

Brettus

iTrader: (2)

hmmm should I answer that or not ? he he

I like the mazdaspeed design - keeps the larger surface areas & filter away from the heat of the engine . Only drawback I see is the PITA to clean the filter .

olddragger

iTrader: (3)

dont forget the rb flash now available---20 hp is conceivable with it and a few other mods.
olddragger

Brettus

iTrader: (2)

add that to a LW Flywheel & you have got quite a big improvement from stock - perhaps almost matching a poorly tuned greddy turbo setup ........

Vertigo-1

iTrader: (3)

I have a question regarding the REVi intake...from what I've read on it, I don't understand why exactly the VFAD needs to be removed, at least from a physical installation standpoint. Is there any reason why you wouldn't be able to just simply drop the REVi box right in place of the stock box and leave the VFAD in? I've read that the REVi has a longer inlet mouth, is this why? Would it be too long and start shoving the VFAD hose back in the engine bay inlet opening?

Fanman

It doesn't NEED to be removed. In RB's statement they took it off because it is a restriction point. They claim it is used to reduce noise. Unfortunately at the same time it restricts the incoming air a bit. That is why they removed it.


From the RB site :

"Even if the VFAD unit is fully open, inlet air is still somewhat restricted; so removing the entire intake assembly removes one restriction from the intake tract. But, as long as the stock air box has its relatively restrictive inlet mouth, the stock intake duct assembly should not be considered a serious restriction. If you were to simply enlarge the air intake opening on the stock air box, and left the stock air duct assembly in place, this would still maintain the restriction that you would have had with the air box. With the installation of the REVi Intake, we remove the entire stock air duct assembly. The only negative from removing the air duct assembly is a slight increase in noise, with our measurements indicating about 2-3 db (A) increase."

8rotor8

iTrader: (2)

also too, you need to remove the VAD to install the Revi.

Vertigo-1

iTrader: (3)

Didn't Fanman above just say that you do NOT need to remove it? Now I don't know who to believe. The reason why I'm asking is because I don't care about getting an intake for power...just for a slightly more aggressive sound, period. And I am completely against taking apart my bumper and then risking body parts not fitting together as tightly as they do currently. This is why I really want to know if it's even necessary at all to remove the VFAD, because everything I read shows that there's nothing physical behind the bumper that's somehow tied to the REVi box. By that I mean that it doesn't seems like you need to connect a hose from the REVi to something behind the bumper, etc etc. And if the REVi has no problems fitting against the VFAD hose inlet in the engine comparment, then it would seem like I should be able to just drop a REVi box in place of the stock box and call it a day. I never did look at the REVi very hard before because I thought you absolutely HAVE to remove the VFAD. I'm sold on it though if you don't.

Fanman

That was straight off the RB website. If you don't want to take it off, then don't. The reason RB did it was they did not care about the extra 2-3 db of noise and the VFAD was a restriction point.

You DO NOT have to remove the VFAD to put on the REVi.

Vertigo-1

iTrader: (3)

Thank you very much Fanman for the answer! I think I see a REVi in my engine bay pretty soon.

Mazda-Rati

If you aren't going to remove the VFAD, You are going to have to find a place to mount the vacuum canister and find a way to route the hoses from the TB to the VFAD

Vertigo-1

iTrader: (3)

I know that the manual has all this extra complicated hosing, but I'd be installing it into a 04 AT. So is it still applicable to the AT?

Mazda-Rati

Well, you luck out then. The ATs don't come with a VFAD so no worries about pulling the bumper off

RX8Maine

Congratulations . . . you have become a better driver. The $$ you spent on track days did more than the $$$$ you spent modding.

Disclaimer: I have no data on which to base the above statement, it was pulled entirely out of my ***.

Brettus

iTrader: (2)

Well I'd like to think my driving had improved that much but I assure you this is not the case .
Add to this a 1/4 mile time of 14.4 @100 MPH & 0-60 of 5.85s . Plus Comparing vids of my tach vs a couple of others that have been posted here confirms that my 8 is faster than your 8 HA HA LOL

swoope

iTrader: (5)

wow,

trap speed at 100mph... i have to disagree your ecu is doing something for you...

our mods are close.. highest trap speed i have seen is 97.5 and i have to admit to a bit of an elevation change. in favor of speed..

beers

Brettus

iTrader: (2)

pm

Brettus

iTrader: (2)

Swoope ,
thinking about why i consistently get high trap speeds - (my best is 101.7MPH) . I think it is to do with my higher 3rd gear ratio . JDM spec cars come with different 3rd gear.
When you change into 4th you lose a few mph before accelerating - I don't have to change into 4th on a 1/4 mile run .

swoope

iTrader: (5)

ah,,

yep. that would do it...

do you have the ratios for you trans?

beers

Brettus

iTrader: (2)

dug this out of an old thread where we had a discussion on this . Looks like 1.53 to me .
https://www.rx8club.com/attachment.p...chmentid=89648

CKay

Hey does ne one kno where to get the Revi+Duct for the cheapest price, i know that mazdaparts.com is cheap but i still dont have gold status and its been for ever. I really want me Revi

dynamho

...and foliage if you have autumn where you live. Stay stock.