How should I build my exhaust?
 

All right guys hopefully this will be my last exhaust thread.

Ok, I can't go out and spent $1000 for a new exhaust system. Let me tell you what I'm looking for: 1. It has to be somewhat quiet, I would like it to be a little louder than the stock exhaust. 2. It has to flow well. 3. And it has to last.

I've got different ways on how I would like to build this exhaust. Start by looking at the attachments and then look at the links.

Exhaust #1 will contain two of these
http://www.magnaflow.com/02product/s...ne=main&id=519

Exhaust #2 will contain two of these
http://www.magnaflow.com/02product/s...ne=main&id=519
And one of these
http://www.magnaflow.com/02product/s...ne=main&id=515

Exhaust #3 will contain two of these
http://www.magnaflow.com/02product/s...ne=main&id=519
And one of these
http://www.magnaflow.com/02product/s...ne=main&id=521

Exhaust #4 will contain one of these
http://www.magnaflow.com/02product/s...ne=main&id=521
And one of these
http://www.magnaflow.com/02product/s...ne=main&id=513

Exhaust #5 will contain two of these
http://www.magnaflow.com/02product/s...ne=main&id=519
One of these
http://www.magnaflow.com/02product/s...ne=main&id=521
And one of these
http://www.magnaflow.com/02product/s...ne=main&id=513

Ok, so tell me which exhaust would suit my needs the best?

Exhausts #3, #4 and #5 are similar because they all use a single-in and two-out muffler as a presilencer. However, #5 contains a second muffler (presilencer) that is single-in and single-out. #4 is the same as #5 except it has no mufflers at the bumper.

Please leave a comment because I am serious about building this exhaust and I don't want to screw this up.

Thanks.

Start with a cat replacement pipe. You can get one made for like $30 I got mine for $20. That makes the car a little louder and it improves flow. You could also get a down pipe made and replace all the cats.

I am planning on redoing the entire exhaust.

So you don't want to spend 1000 dollars on an exhaust. Will you spend 500-600?

From your description based on what type of sound, flow, and longivety needed, i would simply reccomend the Racing Beat catback.

If it's turbo, then get the full turboback. If NA, get the header back. You will not have to worry about anything with this system. Stainless steel at its best.


If you don't want to spend that much, then sure get a custom system built, but make sure they use good piping, and it's not some entry level welder who just graduated the art of mig 2 weeks ago building your system.

I've had custom exhaust piping crack at lauches.
Maybe i had bad experiences.

Good luck

Justin

Enough said. I personally would never use anything but racing beat.

Are my links and attachments not working. I do want to do a custom exhaust. I was looking to spend about $500. I can't just buy a catback, because the exhaust on there now is junk. The previous owner had new mufflers and a cat put on and did a bad job.

Please don't tell me to buy a Racing Beat exhaust. I can't spend a $1000 on a exhaust system, because I am going to have a project car that I will be putting my money into. I'm just trying to get a good exhaust system that can hold me over till I get the other car done.

So Please look at the attachments and tell me what you think would be a good system.

thanks

Btw, its a N/a

Hey, when you want to save or host or whatevers to an image. Convert to .jpeg, cause .bmp's take too much space and less loading time. Just a tip.
As for teh exhaust, you shoud weld your own pipe or ask a pro do it for you, if you want it customized. Otherwise, I'd go for the A Pex'i catback.

Ok. Get a racing beat header (around 200-300 bucks), and have your favorite exhaust shop weld up a single or dual exhaust for a few hundred if that, that will last you 5-6 months depending on how good the shop is (i know it will vary depending where your are from, and who you know). If you are looking for a temporary exhaust, you might as well just find another stock catback. If you are looking for power, then go ahead and spend money on something already proven.

i will tell you this if you put magnaflow on there it will sound like shit imho. this is how i am doing my personal car i am buying the two racing beat canisters which come with hardware and are able to bolt right up where the factory's were, i am then, since my car is not a stock turbo i am making my own downpipe and getting it ceramic coated. Since it sounds like your car is na i would suggest the dual canister setup, if not like on my car i am going with a single canister because it flows better the dual canister setup will help more on a na car than a turbo car imho, you can scrutenize that all you want but neway. then once i place my canister in and get my downpipe mocked up just connect the pipes pretty simple. but i've heard a magnaflow on a rotary and it just doesn't sound right to me. again i am not trying to start shit or make up some bullshit just to piss people off this is just what i found in my own personal experiences and i will back them up. thanks again.

he brings up a good point to. we don't have emissions anymore that's why i'm doing it that way.

The 6" mufflers for the rear will work but get the 18" body ones with 2"ID thru it. You want the largest cans possible hanging under there. Get a good used RB collected header and a presilencer if possible otherwise the single inlet, dual outlet will work pretty good as presilencer. Not sure what it will sound like without a true RB presilencer but I imagine it will be acceptable.

Do my attachments work at all, or should I post them in .jpeg?

Yes they work. Just slow to load. I'm on DSL so it doesn't bother me.

You guys are telling me to buy a header, but I'm not going to spend $200 for the extra performance when I can but that into the project car that i'll have.

Sorry for the trouble.

You’ve said you don’t want to screw this up, and I can appreciate that, but these are the cold hard facts –

Building a rotary exhaust that’s quiet, flows well, and will last is not done with generic magnaflow mufflers, some exhaust tubing, and a buddy with a torch. The guys at RB go through design after design on a dyno before coming up with a product. Quite frankly, you may wish to consider buying cheap replacement mufflers and a no-name y-pipe (if you need one). It will probably flow as well as anything you come up with on your own.

People were suggesting magnaflow in my previous threads. Heres one of them. https://www.rx7club.com/2nd-generation-specific-1986-1992-17/chambered-mufflers-rotary-530572/

oh, and I'm not looking to make a better system than Racing Beat, more like making something that works.

If you're doing a budget custom job don't do duals, first off a highend muffler is going to cost you $200 min so your entire budget would be taken up but the mufflers alone. Not sure if you said if you're doing a catback or replacing the cats also but if replacing just the catback all you're going to want is 2.5" mandrel bent pipe to a single muffler. If replacing the cats also then I'd suggest making it in 2 parts so you can swap the stock cats for emissions testing or if you get a ticket for running catless. Then pop in a magnaflow or a resonator in where the cats are, there really isn't that much room so it's not like you have lots of options.

Can someone tell me how well these flow and muffle? http://www.magnaflow.com/02product/s...ne=main&id=521 Because I was planning on using one as a presilencer then have two pipes run to two 6" mufflers. Like this.

Know one can help me?

There is so much bs in this thread from people who have no idea how to actually build a exhaust its unreal. First off magna flow SS race series exhausts or borla xr-1 flows better than a racing beat filled with SS mesh. Magna and borla are straight through and you can search my posts for pictures of exactly what I am talking about. The only way to quiet a exhaust down is to restrict it. However these exhaust's deepen the tone to take the jap car raspyness out for a overall better sound. Use one of the above in a oval for your cat and get the longest one they have. Then its up to you if you want duel or single. I would suggest single for better flow, sound, and weight savings.

Bukwild thank you for posting. Reading your posts makes me want to run a 2.5in/out Borla XR-1 as a presilencer. But what mufflers do you think I should run? I do want to run duels, because I think they look better.

How can I hookup air tube for the air pump? Can I just weld on a small air tube to the exhaust pipe?

thanks

i take it you aren't going to be running any cats?

if that is the case, then you should have room for those long resonators. you won't have space for anything longer than maybe a 14" long reso if you want dual mufflers, as well as cats.

i would use twin mufflers, but i wouldn't use 6" rounds. i would use 5x8x14" offset/offset mufflers, and that big single in/dual out resonator. that way you don't have to fabricate a Y splitter.

the oval mufflers i mentioned above are a little bit big, so you will be able to see them when looking at the car's profile, and they will stick out a bit under the bumper when viewed from the rear of the car. i don't know if you care about those aesthetics or not.

90fc I am not sure about the air tube. I do not have one. Someone else on here can probably tell you what needs to be done for that.

If you go with a xr-1 to replace the main cat, get the longest straight 2.5 in and out they have. Make sure you order it in a oval not round. I fit a 4 inch exhaust and a 4 inch oval in the spot my cat used to be so you do not have to worry about room under there, you have plenty.

And on the duels. It does not really matter. You might have to source the y pipe somewhere like www.ATPturbo.com I got all my stuff from them and www.jegs.com
jegs has free shipping. I also would suggest doing this in series. Replace the cat first with the borla then judge if you want to replace the stock piping or use the old stuff and weld the 2 rear cans on. Just dont get 2.5 in and a 4 inch tip out. that will sound like a fart can.