Quiet performance exhaust - Do they exist ?

[stylus350]

What did the Racing Beat Silencer cost you? and where are the pictures?

I\'ve thought about getting one of these.  Wanted a Blitz Nur Spec V which is tunable but they don\'t make it for the rex? why??

I think Nur Spec R will be too loud.  So pics then, come on, what\'s taking you so long lol

Sorry - been out for a blast:). I will take pics tomoz. Here\'s the downside - £442 delivered. This included an exhaust hanger (5.75+vat) and 3 good used mounting rubbers (15+vat) as mine had been changed at some point for aftermarket ones. Money well spent in my opinion.:cool

[PETE SMITH]

Stylus...wots your real name??!!
It\'s a good cat-back..out of interest, what mid-pipe do you have?:Thumbs-up

[stylus350]

Hi Pete. It\'s Paul. Its a silenced midpipe but i have no idea of the make. Too late to take pics tonight too.

[RobEVo5]

Well good news is my second hand racing beat turned up today. Downside is its rusty , and for the money these things cost new would have really expected it to be stainless. Even my Mongoose is Stainless.

That aside the rust is only surface rust on the pipe and welds and nothing a wire brush and some high temperature paint won\'t sort out. On the plus side once I got past the rust thing, the build quality is very good on it, and the back box is huge, with 2 very nice tailpipes. I can see already that it would make a big difference to lowering the sound levels. Should be under the car this weekend all going well, and this will be with a mongoose small silenced mid section as well.

[Newera]

Here\'s an explaination to help people choose the right back box to suit their needs.

Straight through cherry bomb style back boxes are the loudest type. The shorter the silencer part, the bigger the bore and the thinner the silencer\'s cross section, the louder it\'ll be. Logical stuff, really.

Look at a standard rear box on an RX-7. The pipe goes into a box and comes out the other side, right?

Well, almost.

You see, the pipe goes in and zig zags in a "Z" shape, before coming out of the other side.. So in effect there\'s a lot more silencing there. Also, it\'s a thinner diameter both into and out of the silencer. Doesn\'t mean there\'s no performance. Knight Sports FD3S exhausts are quiet, but give excellent power characteristics. Same with RE-Amemiya\'s classic, Auto Exe\'s, etc.

So, as a rule of thumb - if there\'s a silencer section similar to the original backbox design, this will be quieter than a cherry bomb" styled design.

HKS, Trust, Apexi, Fujitsubo, etc, each make different exhausts. These larger companies usually make several for the FD3S. Saying a car has an HKS exhaust is like saying it has some Bridgestone tyres... There are often several different models from each exhaust specialist.

Sometimes seen people saying they have a "JASMA" exhaust. That one cracks me up. It stands for "Japan Auto Silencer Manufacturer\'s Association". It\'s not a brand... It\'s to state the exhaust complies to japanese road use standards only!

We sell Apexi\'s exhaust control valve, which may be useful for some of you. It\'s a manual butterfly valve which can be controlled from inside the car via either a cable (manual) or via an electric servo which has a programmable controller (City mode, revs mode, etc). A useful item for use where you don\'t want to wake the neighbours!

Hope this has helped

Miguel.

[DarranJones]

I love these exhaust threads.

I\'ve just fitted a hks downpipe, dragon silenced midpipe (the new style), and a tiger catback to my rex. Unfortunately I can\'t comment on the noise level because I\'ve still got to put all the pipes I\'d removed when doing the downpipe back in the engine bay.

I\'m dreading fireing her up incase it\'s too loud. :flamed

[gmogle]

My exhaust has gone and had to put the cat back in for the MOT.

I have a silenced decat to put back in after the MOT but need to get a new exhaust.

How loud is the Nurspec ?
What about the Greddy Power Extreme 2 ?

Budget of no more than 450 really inc delivery.

I would rather have it noiser than quiet but not too loud that it wont be allowed on trackdays.

Is the Blitz really that loud lol

Anyone got any wav/mp3s of exhausts on idle ?

[Kash_]

Is the Blitz really that loud

In a word....yes

Anyone got any wav/mp3s of exhausts on idle ?

I will try and record something on the weekend if I can

[ashc]

i had a straight through nurspec on mine, it was silly loud at WOT, and a deep loud rumble at idle, too loud for the wife(!) I came back down the m25 once with some mates following behind me in a M3, said they could hear it over a mile off. It was a nice rumble inside the cabin when driving though, still hear the stereo ok! Main problem was reversing it up the drive at home, made the conservatory vibrate and small ornaments fell off the shelf ! I miss it, but it wasn\'t subtle.

[RobEVo5]

Fitted the racing beat - on the Magnex Mid pipe which has a small resonated section. VERY pleased with the result.

Its only taken a few desibles of the noise, but is definately quieter and now at a sensible level but still sounds like a sports car. Best of all is the note of the sound has totally changed, and now given a raspy higher pitched sound that almost sounds like a motorbike/ E46 M3

It no longer drones, and gives a nice rasp even when just accelorating up to say 3K revs.

In summary very pleased, like the sound level and note of the zorst, and better still its stopped a knock that I had from the rear which I thought was a knackered shock, but must have been the prevous box knocking against something.

[Initial-D]

Glad your liking the Blitz Kash!
Rob, the knocking you heard would most likely be the exhaist knocking against the diff casing, a bit of exhaust wrap will cue that.

I\'m thinking of getting an adjustable butterfly for mine at the moment as I really don\'t want to upset the neighbours abnd get on some tracdays too. I\'ve also seen R-Magic do a nice silenced midpipe theat will only lose about 10 bhp (Hyper rev vol.91).

Miguel, do you happen to know a really good silencer that won\'t lose me lots of power but will quieten the noise a bit. I was looking at the Apexi valve but they don\'t appear to make one big enough - the Apexi bung that opens and closes might be better but I don\'t know if it\'ll make it any quieter. Hyper rev has alot of mid-pipes in there but no guide to what difference it\'ll make or what cpsi is used for the internal metal makeup.

[slippers]

Ben

I use two apexi variable bungs on the cosmo, six am and a confined car port do not make for a happy neighbour.  These bungs do reduce the noise but definitly restrict exhaust flow despite what they say, but atleast you can take these off.

jon

[Initial-D]

Mmm.. sounds like a temp fix until I find the mid-pipe I\'m after.

[John Yorke]

If anyone wants a propper free flowing 3" zorst sound tested at 85db static race track test in stainless steel I have just the puppy. The backbox is twin exit coupled to a silenced mid pipe it has been RR tested to 420atw, to good to be true eh?

[RobbieRX-7]

If anyone wants a propper free flowing 3" zorst sound tested at 85db static race track test in stainless steel I have just the puppy. The backbox is twin exit coupled to a silenced mid pipe it has been RR tested to 420atw, to good to be true eh?

More info please:Thumbsup!