3" Straight thru exhaust?
 

straight thru exhaust? (stainless steel), with no muffler / cat / resonator? will it sound good at all?

currently all my car has is a huge muffler underneath the body (no cat)....it's the tanabe muffler or something the previous owner said, all I know is that the downpipe / midpipe is 3" stainless steel (tanabe downpipe, and a midpipe.)

how loud would it be with the muffler off, and how would it sound? does anyone have a video clip of it? thanks.

Everyone has their own tastes (sound level and character), but I know I would hate a 3" straight pipe. It would be too loud and raspy for me.

-Max

It would sound like shit and be way, way too loud.

anyone have a sound clip of it? I'd like to hear what it would sound like.

everyone has different sound tastes. :)

I have three inches straight through with a streetport sounds great. That is my oppinion though lol, I got the JIC Spec 90 exhaust...

mine is street ported also.....is there anyway you could record a clip of it? idling / rev? Or is there anywhere where I can listen to exhaust sound clips kinda like the LS1 boards?

If you want an idea just take off your exhaust and run the car...It is very loud and IMHO it is not recomended

ive got a straight through exhaust with a straight through muffler, I hate the sound, raspy and loud. I'm currently working on fitting an apexi active silencer on it for daily driving.

Yeah I can set up a sound clip... I am not going to be around the car until Sunday but I will take a clip, I don't know how to host though... I dont know about the quality either... All I have is a digital camera

Mine is straight but with a Racing Beat single tip muffler on the end... and it's plenty loud.

In fact, if it were a little quieter, it wouldn't be a bad thing. Keeping a low profile is worth a few HP :)

Here's a hint....undo two bolts and pull your cat-back off. Then you'll know exactly what it sounds like. I really don't get threads like this!

In my opinion it from my '91 rx7 it would be Way to loud and have backpressure problems.

sound clip would be much easier than going outside and sweating my ass off in texas heat

....if no one has a sound clip, then I guess I'll just have to experiment and goto a muffler shop & get a test pipe fitted and see if I like it.....

Ive seen a couple for sale in classified section in the past, but those were for "racing only" exhaust and definitely not for the streets. I would imagine it being light as hell w/ the cats, resonators, mufflers and etc.. Good luck.

it would be too loud for a camera to actually capture the sound accurately, but trust me, its raspy, pulsy, and only kinda sounds good at WOT, but hopefully you wont be at WOT all the time in your "texas heat"

I don't WOT very often in this car, not untill I get an aftermarket temp gauge atleast.

ive had a single tip catcback with no resonator and a test pipe
i would never recommend goin back to that ever

I don't think it would be too bad.....the car as it sits now has no cat / resonator's, and a 3" downpipe/midpipe, still has the stock exhaust in the rear portion though....and a single tip muffler welded in (aftermarket) at the end and is not loud at ALL. It's too quiet personally....

I can hear the turbo's over the exhaust still right now as it sits when boosting. =O(

I was configured exactly like Wargasm, with DP MP and RB muffler. Was a bit loud at WOT.
Sounded nice to me, but the police would definitely not like it. I'll be putting a high-flow cat in there next week to keep my noise profile lower, and to be legal. There's a big fine for no cat here.

It really comes down to a matter of preference. I would get real tired of such setup for a daily driver. But, for my toy beasts, I always had as open an exhaust as I could get away with. My present FD has a DP, a practically open pipe performance Met Substrate Cat and an huge straight through Corksport exhaust. I love that wild, angry, snappy tone that reverberates between the hills of my homecountry. Still, it is nothing like the hordes of Harleys that frequent my Gold Country neighborhood with their obnoxious straight pipes.

I remember when I ran dual 3" straight pipes all the way from my front engined V-12 Lamborghini engine. As an owner of any Italian exotic, it is your undeclared duty to rev your engine to the enjoyment of the wider public. The sound from that exhaust had caused orgasmic joy to thousands and permanent anxiety attacks to the rest. I was usually AHEAD of the sound and I loved it. Was music to my ears.

Each to its own....

i picked up my car w/ just a pipe & tip. had the cats, but no exhaust. and the car sounds like a JGTC race car. its CRAZY LOUD. not recommended.. so i can't imagine completely strait. cuz u won't be able to hear your radio or anything at WOT. Plus Rotary exhaust sound is higher pitch than big blocks, so the sound isn't so pleasent

My fd has a straight through exhaust set up with a custom dp, mp, and greddy exhaust. The car is fucking LOUD!!! But I like it -- it all depends on what you're into. It definitely sounds like a lawn mower on some serious steriods at idle. And at wide open throttle the tone is like nothing else, definitely sounds like a race car. :)

Thats a good thing. You got a PFC? It WILL sound like crap. All straight pipes do. Ive never heard a good sounding straight pipe in my life. My car is absurdly loud with a resonator and straight through muffler. Why would you waste money on a test pipe? Your local shop cant mandrel bend and crimps are absolute shit. Seriously. If you want straight pipes buy an ebay midpipe and cut your catback off. And yeah its 2 bolts to unbolt your catback. Dont be so lazy. This is a horrible idea. Thanks.

yeah I know what you mean, it sounds sounds like ASS!!! I wish I didn't ever do it now.....it's so freaken loud!! =O(

I have to wait untill this friday to get the muffler re-welded in, the HORROR!!! =O(

yeah, the back portion is crimp bent (I know, not good.) but the DP/mid-pipe is 3" stainless steel tubing (mandrel bent)....

also the boost is out of control now that the muffler is gone, it creeped up to 13psi!! I immediately let off though, so no more boosting untill I get the muffler put back on. =O(

And you're going to drive it like that on the street? If you do, get ready for some exhaust tickets.

If it's for the track, it would be banned on ours (98db limit, and that think will be closer to 110+ at WOT).

all I know is that everyone in cars that drive by me when I go WOT past them they look like they've just had a heart attack, I WOT'd passed a gas station and everyone pumping gas looked over, haha.....

It's fun to scare people with, but at cruising speeds, and when I want to be quiet, it's quite annoying....I'll be getting the muffler welded back on this friday.

It had a tanabe muffler....too quiet for me, but I'm going to get that put back on for now, and buy a new one later down the road.

When I first read this thread, I thought it was about running a 3" straight pipe with no mufflers for the whole exhaust system. I think that would be very loud and not sound good.

But there are many posts here about running straight-thru mufflers. Since just about ALL exhaust components for the FD are straight-thru, this isn't a very good question.

My exhaust is straight-thru: downpipe, metallic cat & magnaflow muffler in midpipe, Racing Beat / RS*R dual tip cat back. But I can tell you that is sounds WAY different than a 3" straight pipe with, for instance, an A'PEXi GT cat-back.

-Max

Sounding good is all relative, i can offer an experience of mine though, i did a dyno pull with my 3" straight exhaust with a Racing beat dual tip and then with only the midpipe and down pipe attached and the amout of sound was at least 10 times louder, almost painfully loud. The power gain was only 3 rwhp, so IMHO, its not worth it.

Sorry for the resurrection of an ancient post, but hey I used the search function. So I have some notations on the thread then a question...

Straight Exhaust = Nothing, no cat, no tips, no silencer, no muffler.Just straight pipes all the way back to the rear of the car. So with that being said, I would also like to make this assumption. Adding a car length of 3" pipe would sound different that pulling the exhaust off all together. Also correct me if I am wrong but there is nothing that you would damage by running a straight through exhaust, no valves, no lifters ect.... So other than the sound level there is no con. Rotaries don't need back pressure, So performance wise it seems to me this would be the best set up. nos since we aren't talking about v-8's that glorious classic crispy sound would not be archived so unless your at a track it would be sort of useless. Correct? Add in the cost of paying all the noise ordinance violation tickets, and it's really not worth the HP gain.

I refuse to run Cats on any car I own simply because the thought of re-using half burnt hot fuel doesn't appeal to me. So the question I pose is this. Due to the inherent loudness of our cars, Is there a true dual exhaust for our cars? I have an '87 FC Turbo II, No mods other than a full JDM engine and tranny swap. So I don't have all the emissions BS on my car. I have the pleasure of living in a county that isn't tested for emissions :) By true dual, I mean a 2 to 2 header and straight pipes to the back. I don't want the y pipe. I do want mufflers, any advice? Suggestions.

I don't see what a cat has to do with re-using half burnt fuel... since all it does is force the exhaust to go through a "filter" the creates a catalytic reaction that will filter out harmful emissions from your car. It helps the environment. It doesn't put unburnt fuel back into your engine. Lol.

But, if you want a true dual exhaust for an FC, Racing Beat has one. Expensive, but it is True dual. 1 pipe for each rotor. My buddy has it on his FC and it sounds beautiful (For a rotary with no restriction in the exhaust)

Except for the fact that you would have a potentially horrible boost creep situation....and except for the fact that just having a short piece of pipe isn't always the best airflow situation....

I'm with Monkman, WTF ARE you talking about here???

Um, FD's only have a single exhaust feed, it's not an n/a car. So we only need a single pipe running to the back. If you are talking about for an FC, well we have a 2nd Gen forum where that should be asked....

Is the poster serious? A strait through pipe with no mufflers at all with a street port would be unbareable and literaly hurt you ears! :crazy:

We don't have V-Twin engines so there is no true dual exhaust. The only way to acheive that would be dual single turbos with exhaust from each all the way back. Even the OEM twin turbo merges to one exhaust on the manifold.

Ive got a flyby of my car that I can link up
HERE
It was just a camera phone but still, you get the idea. Its really loud actually, you cant have a conversation with someone in the car, it kinda sucks. Im 3" dp, 3" straight through midpipe with the Apexi GT spec exhaust

I second the true dual RB exhaust on a NA. I run this on my FB (bp 12a, holley 465 kit, long tube uncollected header into duals) and it sounds beautiful. It does go into a single muffler at the back, but it's a very nice sounding exhaust. If you're running a turbo, then the only way to have a true dual exhaust is to do a custom twin setup where one turbo runs off of each rotor (it has been done, not sure what to search for to look at pictures), but you'd need separate downpipes to dual pipes running back to dual mufflers.

hey if you like the sound of crispy exhaust but want to remain discreet, maybe consider one of those electronically controlled mufflers, last time i checked you can adjust some knob to pretty much go from rather quiet to full exhaust, the benefit is that apparently its meant to function as a straight thru exhaust when open (set on loud)... i think apexi makes one and i think theres a "Varex" or something...

and since when do cats catch unburnt fuel and plumb it back into your engine ><

I think the cat thing that Monk was talking about reusing fuel was the EGR piece of it.

i have a feed FP01 downpipe, ebay midpipe and jasma catback, the whole system is 3.5 inch all the way.

its quite loud at idle, and driving is pretty loud too - doesnt sound too bad, but it is quite loud for an idle.

However, WOT and throttle blips when downshifting (heel and toe) make me cream my pants without fail every time.

If its not your DD then i wouldnt worry about the noise.