superslydr

well i cant afford a $600 racing beat exhaust so i am gonna have a local shop run one...i was wondering i have a big stainless steel muffler that i would like to put on it........what size exhaust do yall suggest for perfomance???????3 inch, 2 3/4, 2 1/2???i have heard that the more flow in and out the rotary motor the better....but just how much is too much

Dan_s_young

iTrader: (1)

The less restriction the better the only thing that limits you is volume...

trochoid

iTrader: (6)

Larger pipe=more noise Thinner pipe=more noise 2-1/4" heavy wall with headers.

DJAngelicon

So Larger and Thinner = both more noise. I know for a fact you need a presileser but with a bigger pipe and headers would that give more peformance?

I know RB is nice full set exhaust, headers, two presilencer and all the piping but that = lots of cash. I was also thinking later on runing headers and straight pipe for a cheaper price but the noise I won't mind so much since my car is still kind of loud as it is. I think I worry more about performance and then worry about noise later on. lol

For a 12A what size would ya recommend?

For a 13B what size would ya recommend?

I know this is asking alot when I say 13BT what size would ya recommend? Because I know just that swap and setup can cost alot of money. However I would like to keep notes and even though I might be able to get later in the future a racing beat exhaust system installed.

Rogue_Wulff

My car has 2.25" thick wall pipe, and a Power Tech stainless muffler at the end. It is somewhat loud, but not as loud as many ricers around here. I would not have chosen this setup, but it was already installed, and the pipe has not even had a chance to rust, yet.
It can get very loud when ya mash the loud pedal, but under most other conditions it is quiet enough to not attract the cops attention, as long as you don't jump outta the throttle too fast...............
This is on a stock 12A.

rx7spadeace

natural asperation go with 2-3 tops, na with bored intake and or exhaust maybe a little over 3 turbo or super charged 4 all the way. this may also pend on motors age and health. goog luk and remember the striater the better.

trochoid

iTrader: (6)

I suggest you do a bit more research on rotaries and learn how to use spell check before you post any more bs.

Dan_s_young

iTrader: (1)

I first thought it wouldn't be to loud as well, installed my racing beat header, presilencer to straight pipe, lets put it like this, the next day my racing beat muffler was ordered...

superslydr

well noise is something i love....and here in south carolina we have a 98 db noise ordianance which i will get a paper from the exhaust shop sayin that is doesnt break the law when i have it put on.....i was thinkin a thin wall 3 inch would be right for me but i was wonderin if it would hurt my top end.....did i forget to mention the louder the better.......and as for attracting attention...well thats something i like too

trochoid

iTrader: (6)

You don't need 3" unless you are going bridgeport or larger, or turbo. Trust me, loud in a rotary usually means tinny, when it's an NA. I will need a larger exhaust when the bp goes in, but it will be dual 2 or 2-1/4 to the rear axle then collected.

RX7Elmo

I have the mindtrain exhaust on my car. It's basically an equal length header combinining to a 2" pipe which then grows and extends to 2.25" and then out duel mufflers in the back. Essentially, the exhaust flows through 3 (three) pre-silencers. Is it loud? It's louder than my FD3S rx7 was with a full exhaust and ONLY a racing beat muffler.

Overall, it's not as deep as i would like it. I think the racing beat is the only muffler than can really make a rotary sound truely deep, everything else is higher pitch.

do not use thin walled exhaust, or a cheap muffler, you will get a very tingy high pitch sound you'll hate.

For a streetport, i say 2.25-2.5" is more than enough for piping. Actually, 2.5" is more than enough for most applications.

superslydr

well i wanted dual mufflers.......one on each side but cant fit it on a 1st gen with out movin the gas tank over about 3 inches which is more trouble than its worth......and mine has a high pitch sound right now and i love it, kinda deep on idle but its screamin eagles at 7,000....header, 2 inch pipe that splits into two 1 1/2 inch pipes that then hit a dual in/dual tip flow tech muffler......but the pipe is gettin kinda rusty and wasnt run right so it is hard as hell to get my tranny by it and i figured i might as well have it re done....i have heard a first gen with a flowmaster 40 series and 2.5 inch piping and its sounded great.......but he said he also had to replace the muffler about once every year or so because it would blow out......so what do yall think about a 2 1/4 inch pipe medium wall into that stainless steel muffler, no cat or presilencer.....still gonna be loud because i stuck that muffler to a 87 samurai and you could here it about a half mile away

DJAngelicon

I was wondering, Have anyone here got stop by the cops due to fire on the exhaust? hehe that is one of my worries if I put straight pipes on it.

rx7spadeace

2 1/2 all the way to an aftermarket muffler no cats, sorry, but too much and you lose back presure, and top end, too little and you lose ponys due to restriction, my spelling aint the greatest but i wouldn't sugest it enless i heard otherwise from a vetrain 7 builder, reason 4 21/2 or less na is because you not producing enough flow for bigger pipes and the size sugested allows eficiant flow for stock settings. 21/2-3 bored is becauase you got more coming in and out so up the size alittle, 4' for turbo or super is so you can upgrade your turbo or super without redoing your exhaust now if i am wrong, plz correct me. allways wanting to learn more, but do so with reason that way i understand y i am wrong, insulting me dosen't help the situation thnx

Alex-7

Did you know that turbos require backpressure to function properly? You are talking about a 1.2 or 1.3 litre motor here.................................


Give it up dude, if you knew what you were talking about nobody would insult you.


--Alex

rx7spadeace

right, but the purpose for bigger pipes is to allow the larger flow of exhaust that the turbo will be pusshing when at full, you may get some lag, but you can at least acomidate the top end . again if i am wrong, plz tell me y, as far as i know the more flow the bigger the pipes.

MosesX605

I use a 2.25 pipe in my setup, which consists of the RB single outlet header, two presilencers and a single in/dual out Magnaflow muffler. For a stockport 12A, I wouldn't exceed 2.25 diameter piping, the loss of low end is too great compared to little top end gain. Noise-wise, any generic straight thru muffler will be loud as hell and be reminiscent of a flock of angry hornets. My Magnaflow does produce a fairly low tone, but when I get on the loud pedal, I very quickly get into noise violation territory. If anyone is interested in what my setup sounds like, here are a few clips:

http://members.shaw.ca/deuteronomy/DSCF0105.WAV
http://members.shaw.ca/deuteronomy/DSCF0059.AVI

superslydr

so what do you think about 2 1/4 inch pipe into one pre silencer and a big stainless steel muffler.....and where can i get a good deal on a pre silencer??????