Ian1ian1

Pettit says my exhaust system is rusted out. I like the idea of extra HP for my 10th AE but I'm not really into the typical sound they give off.

Is there such thing as a quiet version of a Racing Beat exhaust system. Stock exhaust sounds just fine to my ears. Obviously sound is subjective and different people like different things - not saying others' choices are bad but it's just not my taste.

Thanks.

BLUE TII

iTrader: (9)

I thought Racing Beat RevTII was quiet.

I think you will have to go custom to find anything more quiet.

Knightsports used to make an exhaust for the FC that split into dual pipes right off the turbo and had 2 presilencers in the stock cat location, 2 in the stock Y pipe location and 2 decent sized mufflers.

That system always looked quiet and high flowing to me, though none of the presilencers was anything near as big as the RB one so it was likely louder than RB now that I think about it.

texFCturboII

iTrader: (17)

Greddy Power Xtreme, if you can find one.

j9fd3s

iTrader: (3)

my friend had a Knighsports catback on his car, and it was really quiet, it sounded great too, its really one of the nicest exhausts ive seen for the FC.

Ian1ian1

Thanks for the quick reply. It's probably best that I hear one of the RevTII in person. I've only heard them online and it's probably not the best way to make a decision.

R-X-R

iTrader: (9)

Borla

Ian1ian1

All very helpful. Thank you all. It's the highlight of my day coming to the forum for the expertise here (I'm pathetic, I know).

GuiltySoul

iTrader: (7)

Trust sp cat-back if u can find one.
I have rb headers and its loud with what ever exhaust u put on, but this exhaust is quieter than a rb cat-back but rb seems like the most likely option

mgs2057

The racing beat revtII sounds good and not obnoxiously loud.

Derekcat

iTrader: (8)

Racing Beat is quieter than the Borla.

Also the Borla won't fit properly on an S5 car (The S5 rear bumper sticks out too far and gets burned.. :/ )

Also +1 for RB

wthdidusay82

iTrader: (15)

Rb is nice if you can afford it but borla is probably half the price

I had the borla on my na and it was loud but not too bad-- having a straight pipe (no cat) -if I had a cat or presilencer I'm sure it wouldn't of been as bad

Wms10th

iTrader: (2)

Keep the cats, it will sound stock with almost any rear exhaust.

R-X-R

iTrader: (9)

i have my cats on the borla and it is quiet,

wthdidusay82

iTrader: (15)

I just always thought the cat was a restriction, rotaries dont need backpressure (unless to open functioning 5/6 ports-mine were removed), and i also thought cats are known to blow out their insides from the high amount of heat rotaries give the exhaust.

So I took the cheap way out and got a 40 dollar straight pipe, the negative being its sooo loud without the cat being there (I also had a racing beat streetable header, and my exhaust diffusers were cut out during engine rebuild)

If you want look up my video on YouTube , nonturbo rx7 redlining , username wtfdidusay69

13bpower

What part of the exhaust is "rusted out". There are 3 basic components to the FC Turbo exhaust system that can 1)be bought independently of one another 2)can be mixed and matched stock and aftermarket 3) will effect the volume of the exhaust 4) will effect the sound "quality" of the exhaust system.

First you have the precat/downpipe. This is the piece that drops straight off the turbo and connects to the main catalytic converter. The stock piece is extreemly heavy and has cats in it that are designed to work when the engine is cold, right after startup. These absorb alot of sound and help keep the stock exhaust quiet. You can swap this out for a downpipe. Many different companies make this piece. They will vary in wall thickness and piping diamiter. Thicker the sidewall the more sound it will keep in. If you just replace this piece with aftermarket you will no notice a large increase in noise volume.

Then next piece is the main cat/testpipe/racepipe. This is really heavy as well and also does alot to quiet the stock exhaust down. A testpipe/racepipe will replace this. A test pipe will increase the sound a lot, especially with a catback installed. Note that some companies (Corksport, Ebay) sell the downpipe and race pipe as one solid piece to replace both pieces at once.

The last piece is the catback. The stock unit is heavy and quiet. Any aftermarket exhaust will increase the volume and change the sound.

What is important to note is that the precat and the main cat are responsible for the majority of why the stock exhaust is so quiet. Keep those two and any aftermarket catback will seem quiet compared to every sound clip you hear online or nearly any modified RX7 you hear in person because hardly anyone keeps the cats on when changing the exhaust. It is a huge restriction to performance. Simply put, keep the cats if you want it quiet and get a RB catback or a Rotary Performance catback.

HOZZMANRX7

iTrader: (43)

I have the RB RevII on my S4 TurboVert, and old school RB REV on my S5. More on point, I also had the RB NA Cat Back on my S5 AutoVert. Bottom line, nothing is a quiet as a stock exhaust. Case in point, I took my RB cans off and put the stock cans on while maintaining the RB Y pipe and it was MUCH quieter. In both cases I was running the stock cat.

The RB cans are much less restrictive than the stock cans, no doubt. So bottom line, less restriction simply equals more noise.

On point, to my sensitive ears, Racing Beat products do the best job minimizing the noise while maximizing flow of exhaust. So in my opinion Racing Beat products are the way you want to go to get the nearest to your noise reduction/performance goal.

13bpower

Yes and no. The stock cats last a long time on the FC. Something that seems to be lost on many of the youngsters getting into the rotary scene is that the FC was in all reality a very well made and engineered car for it's day. Some crappy cold solder joints on electornics and a couple other weak points but beyond that it puts most everything else from the late 80s to shame.

The only aftermarket cat I would put on the FC is the Bonez cat. Rotary Performance sells those. Any other cat will get destroyed by the heat off a rotary very fast.

barkz

iTrader: (1)

love my RB, nice low tone(not loud) while cruising, and even getting on it its not bad at all. but as others have stated, it aint cheap

Ian1ian1

Excellent info 13BPower and everyone else. It's an education coming here. So it sounds like the key is to keep pre cat and cat and go with the RB. And from what I'm reading I won't get the performance gains of the RB exhaust by keeping the pre cat and main cat in place. So it seems like a trade off between quiet sound and performance gains. I'll post some pix of the current exhaust if I can get under there.

BLUE TII

iTrader: (9)

And from what I'm reading I won't get the performance gains of the RB exhaust by keeping the pre cat and main cat in place. So it seems like a trade off between quiet sound and performance gains.

From what I remember of old magazine articles the Racing Beat cat back on a S4 provides 7rwhp gain due solely to the less restrictive mufflers (ie, the Y pipe does nothing but look better than stock).

Racing Beat Rev TII 3" turbo back on a S4 provides overboost fuel cut, so 100% decrease in power. The Rev TII with Fuel Cut Defender (FCD) provides 59rwhp gain both from less restriction and increased boost.

FCD is also known affectionately as FC Destroyer as it greatly increases your chance of a blown engine since your engine can now run at a much higher boost than it was designed to. If you just have the Rev TII exhaust/FCD combo (no intake modifications) and your fuel pump/filter/resistor-relay/wiring/injectors are all in good shape it is marginally safe.

A nice set up is to switch to the dual wastegate S5 turbo with the wastegates ported and you will have much less boost creep.

Turbonut

iTrader: (1)

For what it's worth S5 TII we purchased new.
Tried the RB Turbo back system, had it on for a week, exhaust smell was horrible and drone when driving was noise I couldn't stand.
Removed and replaced with the original, yes original mufflers, not aftermarket and they flow great, have the precat removed, and with the factory main cat or Bonez cat the car runs 12 lbs with either, but with the Bonez, the car's exhaust is slightly louder. Been this way since 2002.

Logitikes

sound pretty good, im looking for one too. its light, not too loud and looks good. rb duals sound good and is pretty quite but theyre pretty damn heavy. Also, the fc in this video is catless so if you throw in a cat it would be even quiter

RexRyder

iTrader: (10)

Borla XR1 mufflers. Also if you have open wastegate a quiet exhaust would be pointless.

13bpower

So what portion of your exhaust is "rusted out"? I would suggest you get a Bonez downpipe, keep the stock cat on and if possible stay with a stock catback. If you need a new cat get a Bonez cat. If you are interested in getting a quiet aftermarket exhaust look into the Rotary Performance catback or the RB catback.

Staying with the stock precat would keep it much quieter but that thing is evil.

Ian1ian1

Pettit says that the mufflers are rusted. This is really excellent information from everyone here. I went to Pettit today and he also suggested a Racing Beat Cat Back exhaust. Just like you guys said - he suggested to leave both pre cat and main cat in place. I got to see a cat back system there and aesthetically it is much nicer than the stock. The stock exhaust looks really old and cheap.

I also got to hear a RB cat back on an FC and it sounded great. Not loud or obnoxious but subtle. There but subtle and I think that for the better look achieved it is worth it.