gbrown16

Will a exhaust system with no presilencer and no cat and only a muffler be too loud to run on the street? I know it is illegal. Will lack of back pressure be a problem?

Rotaryhaven

iTrader: (17)

It depends on the muffler. The Racing Beat muffler quiets down the car alot. Even with just a straight pipe as an exhaust.

Jeezus

iTrader: (4)

that will be LOUD. I will be running header to borla XS muffler, i believe.

Rotaryhaven

iTrader: (17)

I have run 6 cars with Racing Beat Header, straight pipe and muffler. They were never loud.

Paradox

iTrader: (1)

RB system might be quiet enough, but 99% of other mufflers just wont cut it. i would suggest if you are using a header to have atleast two mufflers, if not a resonator in there, too. they get extremely loud and it isnt a nice sounding loud, either.

or just buy the RB.. but thats too pricey for me.

RX7KENN

dude you would want a pre-silencer.
i have a racing beat header straight pipe to the muffler,
way to loud, I bought it like that.
and im deffinately investing in a new exhaust system.

LokiRx7.1

iTrader: (1)

I have a straight pipe with a header into a RB muffler. I will link a vid, sounds great and not that loud either. I also had an '85 with a factory manifold and a straight pipe into a glasspack, sounded horrible, and was loud enough to wake the dead.

As long as you have the RB muffler you dont need a pre-silencer. Give me a few, I will upload some videos with no music.

Here is a good one, I just revved the **** out of it a few times. That is from idle to at least 7.5K maybe 8K not loud at all.

http://s174.photobucket.com/albums/w...nt=RevHard.flv

drittens

wow, that didn't really even overlead the mic...was that jsut a digicam or what?
The RB muffler has a bunch of baffles in it like Flowmasters and turbo mufflers correct, not like Mangaflow's straight through style?

Rotaryhaven

iTrader: (17)

Thank you for further confirming my statement.

Rotaryhaven

iTrader: (17)

Another example I have here:

85 GSLSE.

Regular exhaust manifold
Bonez Presilencer/cat
Flowmaster

What did this equal too? It was a tad bit louder than a Header, straight pipe, RB muffler.


The only thing some people say that the RB muffler is restrictive, but to put up with other mufflers (most of them loud and not durable), or put more than one in a first gen, I rather bite the bullet and buy a new RB one.



You get what you paid.

Rx-7Doctor

iTrader: (13)

The "Muffler" is usually the key to the outcome of the noise level. Even with a presilencer if you have a straight thru design muffler the noise level will be loud.

drittens

so, using a magnaflow muffler and presilencer would be signifiganty louder than just an RB muffler since it is a straight through type?

justint5387

iTrader: (1)

Yes, magnaflow mufflers are loud.

VPTUNING

magna flows are loud. i just installed a magna flow on my 7. i straight piped the exhaust. i havnt ordered my header yet and its loud. so i can imagine how much louder its gonna get with a header. also i didnt really like the tone the muffler gets. so im looking to switch it this weekend. ill try to get a video up soon.

heres some pics of the exhaust:

Frostycrowd

iTrader: (9)

I have no muffler and just 2 presilencers and I think its fine at normal driving
its super loud if your getting on it, but just dont get on it where you shouldnt

thomascjd

I have a rb header presilencer strait pipe to to turbo muffler and it's loud but sounds great

LokiRx7.1

iTrader: (1)

I was just looking for an excuse to post a vid

Jose Feliciano

I like it might take out my presilencer

drittens

VPTUNING, do you have that vid yet?

sly-sa22c

my exhaust is about 110db (i think) and that is straight through with just a rotaflow muffler (pertty much straight through style with baffles) and a dump tip.

sounds unreal though! awesome exhaust note

FirebirdSlayer666

iTrader: (3)

Hell anything is probably quiter than what I'm running right now, straight RB header LOL

VPTUNING

sorry drittens not yet took my car back to the paint shop. my car wont be ready till 4/27
as soon as i get it back ill make the video

drittens

Thanks! I'[m in no hurry, jsut curious



Also, sly-sa22c, is that 110 at WOT, cruise, or idle...?