Im going to get an intake soon but i dont know which one to get...i hear alot of people on this forum say that revi intake was really good but then there's that 9.5hp garantee by K&N intake...i dont think that K&N would just go out and say that for the hell of it, would they? I also searched on the k&n intake and most of you seem pretty skeptical about it too so im not to sure which one to get... any opinions?? has anyone gotten the K&N and dynoed it?

 

Yes, this past weekend, two cars that we dynoed had the k&n, one produced the least power of all, and the other was under what it should have been, given everything else that had been done to the car. The K&N also causes idle problems. the REVi is the best out there, IMO.

 

I had the K&N Typhoon intake in my car, for about 2 days! It was so LOUD that I got rid of it! Too much noise for such little HP gain.

 

oh really? haha ok...cause i was leaning towards the revi more but i wasnt sure...thanks guys!!

 

Manufacturers make wild hp claims all the time. How many exhaust manufacturers have we seen that claim 12-15 hp from just the exhaust, when it has been proven on the dyno that most of them make about 2-3 hp. They make these claims because they want to sell product. How many suckers are they going to get advertising 9.5 hp vs. 2.5 hp for a $300 product. I trust manufacturer claims about as far as I can throw them. The manufacturers also know that 95% of the people that but a product will probably never dyno the product. Of the remaining 5%, 50% of those people even if it does not give the claimed hp gain will be too lazy/busy to fight K&N for the refund.

It has been widely proven by INDEPENDANT people on this board that the K&N does not give the 9.5 hp that they guarantee, some have even lost hp. They have a new version coming out, that did about 2.5 hp in Import Tuner. The reason why most people like Racing Beat is because they don't make massive (ridiculous) claims of hp gain. They make a quality product, with honest gains.

 

I had the K&N on my first RX8. When I traded it in for my new one, the K&N stayed in the old car. I still have the OEM intake box in my shed. Was unwilling to switch out if that tells you anything.

 

Again, just as any product you will need to research and view various dyno plots, and other users opinions. Don't rush into purchasing something. I don't have an 8 but it took me almost 6 months before getting an exhaust and even longer for an intake. Why? I let others test everything out first and review their dyno's and problems they had with their car.

From what I gather, the problem is the size of the filter and how it blocks cooler air from coming in. Also, from what I have read many 8's vary in a/f ratios (also due to flashes) so the potential of the intakes performance various as well.

Between the two I would opt for RB even though I think the K&N sounds really cool.

 

if you really want a intake go for the racing beat its just designed better like all there products god i wish i lived in cal.

 

thanks guys for all your help... i continue to research on different intakes..but yeah i think i'll be going towards the revi..thanks again!!

 

I too am leaning towards the Revi. But I just moved to california and was concerned since the Racing Beat website said that "*Legal in California only for racing vehicles, which may never be used upon a highway. " But i've seen people saying the have the Revi but located in cali. Should i be concerned?

 

They put that warning there because they did not submit this unit for CARB approval. Not a big deal, it literally looks like it is a stock piece, so visual inspection, unless the garage jockey knows a lot about our cars he probably won't even see it. Doesn't really affect emissions.

 

I see, I ain't worried no more. time to put in the order! Thanks Fanman!

 

Are you in a dillemma?? :D
The answer is one...REVI..
You should't ask at all my friend...K&N has the more problems from all the other intakes together...Revi is the best solution and this summer with the rb ram-air intake we will have the most gains from an intake system....

 

I was the second one I guess and all the K&N does other than make alot of noise is give your idle a jumpy feeling. The cars with the Revi sounded nice plus it was obvious that their power curves were better.

Jamie

 

i'm getting the REVi

 

I spoke with Jim Langer about this when I went down there to buy the intake. He said that RB is going to get the intakes certified, but doesn't need to worry about it until 2008 when the first RX8's will need to get smog certificates. He said it's expensive to do, so they are waiting until all issues that may come up have been resolved, and to see if Mazda makes any changes in the next revision that might affect installation. Each version of a product has to be certified so that's why they are waiting to make sure the one version they have will cover all the bases. It does pass requirements now; just hasn't been certified yet.....but it will be. So have no fear about buying one; it's well worth it!

 

I love the F1 sound of the K&N at wide open, but the intake wont work when you go turbo so I wont need it much longer. K&N is sending me a brand new kit though b/c mine broke where it mounts. Dont know what I'll do with this new kit. I'm going to use the K&N filter on the turbo kit with some modification. But I'll still have a new kit in the box. I guess it's time for Ebay. :D

Jamie

 

is the REVI actually considered CAI? i've heard any CAI on the rx8 usually decreases the hp draw. also, i got a k&n for my civic before i owned an rx8.. too much noise for nothing. will the REVI make that much noise? i really don't want to change the sound at all. i rather enjoy the stock sound of my car. (save the pipes)

wait wait, REVI with a turbo won't work right? do tell.

 

they wont work together (at least not yet)

 

I just helpd installed the RB Intake, the one thing i really notice is that the car idles so much smoother, and the car feels smoother as wheel. Do i notice an increase in speed via my butt dyno no. But the increase in the quality of ride and the increased gas mileage makes it worth it. Also the car starts easier as well. Go for the RBI.

 

Won't work at all. The REVi unit goes right into the intake manifold. The Greddy turbo is located in the left side near the passenger tire, so the pipe goes right off to the left, then it comes back from the intercooler into the intake. To make the REVi work you would literally have to shear off the back part of the unit, then rework a bunch of the pipes in it, basically rendering the complete unit useless.