AzEKnightz

iTrader: (24)

I am currently helping a friend to decide on what exhaust to get him for his FD.

Currently in mind is the dual tip RacingBeat catback.

What he wants is an exhaust that is really quiest in low rpms so when driving in city (Bay area) he won't get pull over. But once WOT or throttle opens, the exhaust should have a decent loud tone to it =D.

Something of that nature, please advise and where to get them.

-AzEKnightz

Rxmfn7

iTrader: (4)

RB dual tip is best option for what you described.

AzEKnightz

iTrader: (24)

Sounds like I got a second on my decision =D

bbade

iTrader: (5)

I have a 3" downpipe, stock cat, and a RB single tip. It behaves exactly like what you described.

RB single or dual tip FTW!

purerx7

iTrader: (61)

Budget? Does he have the stock midpipe, if so, does he plan to go to straight/high flow/resonated? If he is a weight junkie the RB will probably not be for him.

Other then that, the RB is a great exhaust with its advantages and disadvantages like any other exhaust.

gracer7-rx7

iTrader: (16)

Another vote for Racing Beat. I have it with an SMB midpipe/cat. The only other exhaust that I have encountered that is quieter is the SMB cat back that insomniac has on his FD using the same mid pipe as I. Mine (the RB) is louder at WOT than the SMB.

The only other exhaust I could think of is the Apexi with the active tail pipe silencer that Goodfella is running. Search on his posts.

gracer7-rx7

iTrader: (16)

Gordon,

Keep in mind that you are NA. Most FD exhausts were designed assuming a turbo system. Muffler design for turbos generally differ from those of NA motors since the turbo itself helps to quiet things down and you don't need as much "muffling" or "sound control" in the muffler. I'm not sure you'll find what you are after in off the shelf exhaust systems. You might be well served by going to a custom exhaust with another Magnaflow or Borla in the rear.

purerx7

iTrader: (61)

You are going to have a VERY difficult time finding an exhaust with a 2.5” diameter that isn't custom made. I don't think I have ever seen an exhaust that was actually less then 70mm (2.75") made for the FD. Sound is really subjective to be honest, what I may like you may really hate. Personally, I really enjoy the sound of a nice titanium exhaust, after owning 5 or so now, I will never go back to a SS exhaust. If you want, I am sure I will have a couple of titanium exhausts coming stateside in the next few weeks, I can send them to you to try out and see if that is the route you would want to take. No need to buy them, just pay to and from shipping which should be no more then $30 each way since titanium exhaust are so light. You then would need to decide which "style" exhaust you want, if you want a small or big tip and I can take care of the burnt tip if you don’t like it - thus the tip would just be a light polish and not a bluish/purpleish hue. Titanium exhaust examples:

From left to right, ARC, Ganador and Amuse (that is over $7000MSRP in exhausts). How well muffled the exhaust is will dictate decibel level, IE the Amuse exhaust is going to be quite loud compared to the ARC ti. I own the Arc ti and love how it sounds, almost stock like on startup and no highway drone (very important to me). On WOT, it is the best sounding exhaust I have ever heard, almost sounds like an exotic and not a raspy rotary motor. Their is a common misconception on this forum that all titanium exhausts are VERY loud, this is not true at all, my arc ti is quieter then most SS exhausts on startup. Of course, budget comes into play, the typical FD owner doesn't understand the rationale on spending $1000+ on a titanium exhaust, however, you nor I are a "typical" fd owner.

In the end, it comes down to personal preference; I don't have any sound clips of a 20B with an aftermarket exhaust. Like I said, I have no problem loaning you exhausts until you find one you like, just pay shipping. I couldn’t even imagine how great a titanium exhaust would sound on a 20b. I still think the arc ti for the nsx is the most beautiful exhaust I have ever seen with the gt-rom in a very close second - the na1/na2 (nsx) cars always get the really cool parts .

I could hang this on a wall



In theory, this is the way it should work, however, many manufacturers like HKS, Apexi, Greddy etc use the same canister on their turbo exhaust systems and NA exhaust systems. For example, the HKS carbon ti for the fd and say a lexus IS 300 have the same exact canister, only different sized piping, thus the muffler lining/dampening is equivalent. That larger piping is due to handle the difference in backpressure. Even though the turbos do "quiet" down the exhaust db level, I think it would be a marginal decrease at best - dependening on your wastegate, this could make things even louder (open wastegate).

I do agree that a custom exhaust might be your best approach to getting exactly what you want for a considerable amount less then a titanium exhaust.

AtomicRex

iTrader: (10)

We sell a 3" mid pipe and tailgate for the FD

It is our own version, and is made from high grade stainless, but the really good part about them is they are repackable. Yes...if the noise is too much, you just unbolt the box and repack.

As standard though...they are so quiet you can hear the fuel pump over the exhaust on tick over. It is approx 92dB

However on load and with the throttle planted to the floor then devils are unleashed and they let rip!

£450 for the mid pipe
£480 for the rear box

You should never need to replace your exhaust again!!

gracer7-rx7

iTrader: (16)

FWIW, back in the early-mid 90s, HKS did have at least 3 versions of exhausts for the FC:
One for FC non-turbo applications
Two different versions for their turbo application where the rear mufflers were different and IIRC the overall piping diameter might have been different as well.

Sound levels on the turbo exhaust compared to the NA exhaust was significantly different as I found out when I accidentally ordered a turbo exhaust for my NA. Thankfully my friend was the east coast distributor for HKS so we rectified the problem easily.

djseven

iTrader: (56)

Greddy SP with a resonated midpipe, it doesnt get any quieter for a full 3" setup, Ive had every setup under the sun almost.

AtomicRex

iTrader: (10)

With the pulses generated by the engine...this soon kills most boxes. So what starts as quiet on day one....isnt so quiet 6 months later. Hence why we developed a repackable version. Within 2 races of my first off-the-shelf exhaust I had blown it to pieces

The new one will last the lifetime of the car

gracer7-rx7

iTrader: (16)

Got a link?

AtomicRex

iTrader: (10)

I have thrown in a couple of pictures of our manifolds and downpipe too. They link to a Tial 60mm wastegate.

AtomicRex

iTrader: (10)

The Manifold shown is for the GT40 running the T4 flange. Note the thickness of the flange, so as to prevent warping under full power. Both the manifold and downpipe are ceramic coated for the customer. But below are a couple of photos of a GT35 manifold, this way you can see the thickness of the flange and the quality of the welds.

FD3S2005

iTrader: (11)

i got a rb duel and love it, wouldn't change it. i have a couple of videos of how mine sounds.. start up and such. it has an rx7store res midpipe, (magnaflow)

i believe the first and last one had the windows down... and yes i know about the rattling, it is very annoying, i think i found out what it is but i dont know if i can get to it to fix it, since i believe it may be in the hatch itself.

1QWIK7

iTrader: (33)

^^that setup doesnt sound as quiet as people claim it to be.

It sounds like my PFS catback which people claim is loud.

Or maybe because you dont have the stock cat and i do.

http://www.youtube.com/watch?v=V7ATsxdhPLY

FD3S2005

iTrader: (11)

yea i believe the stock cat quiets it down much more. i love how i have a nice low rumple at low rpms.

grimple1

iTrader: (1)

I am currently running a straight through system with the Corksport FD exhaust. It's a tad loud for your situation but wanted to add it to the list of exhaust options for future readers.