Well.. since I know it'll be hard to convince a muffler shop to weild me a 2" piping.... any other ideas to get rid of the cats, or try to get someone to make me a 2" piping?



I'm trying to look for something cheap, but good. Since rotaries do not like cats, and will eat them up quickly, I just want to get rid of the cats. That, or hollow them out sometime soon.



Any suggestions?

My exhaust setup is some pipe and a couple of mufflers....hope this helps.

https://www.nopistons.com/forums/pub...#>/biggrin.png





Are you just looking to replace the cats, or the whole deal?

Probably the whole deal...but I dunno how I'm going to do it, if I can't even get a straight pipe from the exhaust shop.



What sort of pipe and mufflers do you have anyway ? https://www.nopistons.com/forums/pub...IR#>/smile.png

I don't know what's on there...I was told it's the original RB system, but there's no stamp. It's a 2.5" MP and DP into a 2" dual with nice stock looking tips, and it's LOUD.



One thing you can try with the front pipes is you can take off your cat and precat, bring them to a race or exhaust shop, tell them that you're building a race car and you need straight pipe with those flanges and in that shape.

Do you think that'll work? I mean.. taking the pre and main cat(s) off and giving it to them for the right piping size, etc?



If it does, and I get it in that size, it'll just replace everything so I wouldn't need cats at all correct? (making sure of myself here...)



I know your setup is different because you've got a TII, but I was only curious.



I was thinking tho.. if I can get them to get me the straight pipe, would getting a header be a good idea? I know it'll be loud, that doesn't bother me.... but curious on what you guys would think?

what size piping was stock? seems like a waste to only upgrade to 2"

Really don't need a big of a piping on a n/a though.. bigger piping for a n/a won't give a siginficant change, or to my knowledge. I'm not sure about the stock size.

if loud doesnt bother you then just take off the whole thing

well.. I'm gonna take off the cats once I can find someone to make me a straight pipe.. having no cats on a car, and able to drive it on the street legal ... is and will be hard ...

Do not go to a Muffler shop they are morons that will tell you that its illegal and they aren't taking a fall for you.



Go to some mechanic that dabbles in racing. Tell him you are Autocrossing the car and need a temporary straight pipe you can put on for races. If you word it right you will not get any static. If you cannot find someone to do it tell me I might be able to get a few made and sell them for a really cheap price.

What are your plans for your 6 port actuators, and your air pump if you take off the cats??? Its not so simple as just ripping them out and having no cats. Get the Bonez pipe with converter, thats my advice, although we went thru this last week didnt we?

Did not realize it was a series 4. Sorry christi. If I remember correctly I also told you a while ago about needing at least a Racing Beat Presilancer with the backpressure pipe on it. Thats why I could not sell you the one off of my TII.

yes sir we did, but I dunno. I just want to get rid of the cats, period. The last thread didn't really answer my question.



If I end up getting rid of the cats completely and able to put my straight pipe in, I'll wire open the 6 ports, or take out the sleeves. Since it's not really necessary. I'll also take out the air pump as well as block-wield it.

Yup, I know that. But i've known some people gotten away with going to them and telling them.







How abouts should I word it right to where it sounds pretty good? Yup, I'll let you know. If I do end up taking it to a guy who knows about racing like you said,

if you autox you don't want to wire your aux ports open. Your low end will be even worse. I suggest (as before) getting the RB header and presilencer setup. Your aux ports will be taken care, youd remove the ACV and air pump, it eliminates all your cats, and will bolt right up to your stock cat-back system.

Man that sux that the shops up there wont do that kind of work. I made mine single exhaust with str8 pipe from front to back.

(Headers coming in NOVEMBER)

There are like three shops that i can think of down here(miami) that do it no problem. :bigthumg: https://www.nopistons.com/forums/pub...R#>/bounce.gif

How many times are we going to go thru this?

If you cant find someone to make you a pipe, your going to have to buy one made already, probably with a converter or a silencer.

If you go straight exaust you will have to at least get rid of the air pump

Perhaps with the rest of the exaust stock you may have a slight chance of the actuators still working, but its doubtfull.

Those are your choices, read this and the other post over and over again and im sure you can make up your mind.

Good luck, your gonna need it, lol

I have str8 pipes for "RACE" Purposes only on mywebsite



WWW.rotaryinnovation.com



turned your link into a link. -UT2

hehe, dejavu

3 things:

ed: the really old rb systems dont look like the new ones at all, i dont think the one i saw had a stamp on it, it was just a round cannister



christi: you want 2.5" pipe for an na, thats what they use for improved touring etc.



banzai: i had an 89 main cat on my 88 turbo 2, it fits the same



mike

Hmmm...maybe I do have one then. I'm putting it up on ebay for $2500 as a collector's item. https://www.nopistons.com/forums/pub...DIR#>/wink.png

Christi, how much has the shop quoted you on the pipe?

They haven't given me a quote, because the one I went to yesterday while fixing my exhaust leak said they can't do it because it's illegal...

Unless you want some backwards ass fucktard doing it, you will have to take the converters off yourself and drive it down there. Then tell them you want the manifold connected to the y-pipe with a 2.5" pipe. Even then they may not do it for you, or even be able to because of the flange shape.



Just buy a friggin Bonez pipe or something. Making your own exhaust really only works well on turbo cars.

i went with a 3" racing beat down pipe and 3" glasspack to a apexi exhaust

Mike - that's what I thought. N/a's have 2.5" piping while TIIs have 3" piping.



Rob - I know all this, and I understand what you're saying.



I've already been told that if I go straight exhaust or even hollow out the cats, I'm going to have to do a block off on the air pump (I believe that's it - besides what you said about the straight pipe).



I hear so many stories, I'm not sure WHAT to believe. I do know, that if I go straight pipe all the way back, I'm able to block the ACV, as well as wire open the 6 ports or take the sleeves out. AFAIK, it won't hurt anything.



Bah. The forum is lagging.

This is true, but doing it your own way is a hell of alot cheaper, and works just the same.



I could buy what a few suggestion, but too expensive right now.. ...

This is true, but doing it your own way is a hell of alot cheaper, and works just the same.



I could buy what a few suggestion, but too expensive right now.. ...[/quote]

Just keep your main converter that is new, it also has the air tube, a shop shouldnt give you a hard time about making a pipe if you are at least keeping ONE converter on there, BUT- Keep in mind, it is a FEDERAL law to remove emissions, you dont have a relationship with a shop so it will be hard for you, ask your local pals, im sure SOMEONE knows SOMEBODY. Then when you have more then $4.87 to your name take off the last converter and do the engine mods. For the measly power you are going to gain, why not just keep the one converter on there and dont molest the thing under the hood?

I still say the car will be too loud, but what do I know, lol.

Dont ask us again in a week, thank you!

It may work the same for about a year or so if they use cheap ass pipe. Plus it'll sound like peppered ass if you run no converters, no presilencer, and the stock catback.



If you're that cash strapped, buy new gaskets from Mazda and just gut the precats. Leave the main one alone or it will leak. That is the cheapest way, damn close to as good as replacing them with a pipe, and won't sound like a barrel full of flies.

It may work the same for about a year or so if they use cheap ass pipe. Plus it'll sound like peppered ass if you run no converters, no presilencer, and the stock catback.



If you're that cash strapped, buy new gaskets from Mazda and just gut the precats. Leave the main one alone or it will leak. That is the cheapest way, damn close to as good as replacing them with a pipe, and won't sound like a barrel full of flies.[/quote]

I like your signature.

i just drove my na home from the shop with converters but no catback... sounded like a diesel truck... set off a few car alarms and all... i can only imagine what it would sound like wthout the converters and only a straight pipe... forget it

It may work the same for about a year or so if they use cheap ass pipe. Plus it'll sound like peppered ass if you run no converters, no presilencer, and the stock catback.



If you're that cash strapped, buy new gaskets from Mazda and just gut the precats. Leave the main one alone or it will leak. That is the cheapest way, damn close to as good as replacing them with a pipe, and won't sound like a barrel full of flies.[/quote]

I like your signature.[/quote]

I laugh every time I read it.

That won't be a problem with me - I don't mind the loud noise. Atleast I got something to back it up - if I ended up getting it, without it being ricey.

I have barely any cash, cause i'm still looking for a job, and with it being winter here soon, most places do not hire.. since I live so close to the beach.....





I'mnot just gonna run it with a straight pipe.



I'll add on a header and pre silencer. Don't just tihnk I'll do a straight pipe and leave it at that... nooo way.



considering i've already had to replace the main cat, it probably would be a good idea. But like I said, I don't mind the loudness, it's not gonna be ricey-loudness anyway.



If I can't find a performance shop/muffler shop to do it, I can ask Jim, as he suggested earlier.

The thing is.... taking any or all cats out of your car is illegal, and they won't do it period. That is why I asked is there any simplier way to go to a exhaust/performance shop to get it done.



*shrugs*

you're right, they cannot remove your cats. But if you go up there with no cats, they can run the pipe.

If you're going to add a header/presilencer, why are you going to waste money on a straight pipe now?



And it WILL be a ricey loudness, I've already done it years ago.

you're right, they cannot remove your cats. But if you go up there with no cats, they can run the pipe.[/quote]

good idea.

i just threw 1 away. i cut flanges offa precats and welded them on a peice of tube. but running rb headers and huge mufflers it was too loud for statewoman[yes] 120$ worth. so we went to rb presilencer and it really helped out. you can take main cat off and clean it out any if u want-precats are easy to gut. :stickpoke:

Its such a good idea that I posted it on the last page https://www.nopistons.com/forums/pub...#>/biggrin.png