i booked my car in to get the muffler hooked up on the other side, and while i was on my way to pick up the muffler (which wasn't in yet apparently) i decided to stop in and get a quote from another guy, he said i'd probably take it off anyway, coz it'll sound like a wet fart.... ??

has anyone else hooked up twin mufflers to their car? any comments on how they sound, or even better a clip?

cheers

megatron has twin...
I cannot remember waht it sounds like.

Haydn

hey that was quick! helloo megatron are you out there... the fact that u said "HAS" and not "HAD" is a good sign

just send him a PM.
Haydn

yeah good idea! i also forgot to metion the fact that u can't remember what it sounds like is prolly a good indication that it doesn't sound like crap! does he have twin large mufflers, or twin dual tips? (eg. 4 tips out the back)

twin large
Haydn

I used to have a twin set up, its sounds like shit and droans through the car really really really badly!

Now I have the single set up with a "fake" tip on the left hand side.

yeh, this is what iw as thinkin of doin. A "fake" sounds better to me :)

[quote:ef64c25ebb]megatron has twin...[/quote:ef64c25ebb]

that must of been the magna i saw @ strathpine when i was up there in July.....

maybe...

Heres a pic of mine with the left hand fake (car is dirty as this is when it was off the road) (oh its low at the back because its on axcel stands and no gearbox in it ) :)

oh while I'm posting stuff, here are some re sized pics of my car whilst I had my gearbox problems

I used to have a twin set up, its sounds like shit and droans through the car really really really badly!

Now I have the single set up with a "fake" tip on the left hand side.

yeah, mine already drones a fair bit, i'm not really bothered by that.. although i did notice u have twin dual tips.... is this what u had with the twin setup?

yep, the fake looks quite authentic becuase the original piping is still there

ahh... there is a guy with a similar set up around down the other end of my street... might go door knocking...... i've heard that the twin dual tips can make it sound worse, i might even look at getting a complete split system from the headers.... hmm... i wonder how much they'd slug me 4 that!

well, i went and picked up the muffler anyway.... still wouldn't mind hearing some before i go and fit mine though...... anyone? i had forgotten how big the damn thing is coz its hidden up under the car so well! i decided to post some pics of the small-animal-and-children-eater.

that must of been the magna i saw @ strathpine when i was up there in July.....

maybe...


YEP THAT was most likely me as i work at brendale

but i think my system sounds great to loud at all, will i'll send you the mov

umm... did u post it somewhere? i didn't get it in my email... i think hotmail have a kB limit, so if its over 1 or 2 meg it wont let it be sent...

I used to have a twin set up, its sounds like shit and droans through the car really really really badly!

Now I have the single set up with a "fake" tip on the left hand side.
haha, fake tip! i spose that ads power like Booya's wing!!!

i always have a giggle when you see a car early on a winter's morning and there is only exhaust coming out of one side!!! just a heavy waste of time IMO...

mind, it does look sweet! i suppose it can stay then.....

(p.s. i'm not baggin anyone who does this or likes this setup... i just think its funny and a bit of a waste)

serious question. its generally agreed that a 2 1/2" single system is the best for the v6 magnas. if you wanted a split system couldnt it be worked out to split the pipes after the cat into two smaller diametre pipes which gave the exact same specs for flow rates etc. i dunno if it would be 1 1/4" or of it would be worked out using formulas or whatever, then just run them to twin mufflers and put your nice big fat tips on the end to make it look good. i say this because i heard the biggest problem with twin sytems was creating a void because there was to much pipe and not enough gas to fill it. any ideas?

well the tip pipe and muffler where already there after it was set up orginally as a twin set up, so I had already bought the tip and pipe, I was not going to throw it out, I got the guys to weld it in place :)

It weights as much as a 1.25lt bottle of coke so I doobt it being there is having a huge restriction on the car :)

I would agree with you mgnwag but the problem there is splitting the pipe into two smaller pipes would cause restriction hence would defeat the purpose of a sports exhust.

Your theory is correct but! :)

Split straight from the headers!!!! Would sound sweet :)

Maybe you guys could do a setup similar to the series 1 XJ6 Jag's. They used 6 into 2 headers which went into a single pipe, which then split back into 2.

if you were gonna go all out and really wanted a fully custom set up being a v6 you could just run two headers 3into1 into seperate systems with their own cats and mufflers on each side. dont even worry about joining them. but then again why would you bother.

Split straight from the headers!!!! Would sound sweet :)
yeah sorry i guess thats what you ment to. didnt read it properly.

yeah a proper split system (from the extractors as explained above) would be the only way to get better system than the single sports... splitting half way down (cat back) just doesnt seem to make any sense at all!

yeah Ash, i wasnt bagging you, and seeing as you did have an actual system then reverted its actually good to see (love people being adventurous!)..... i more commenting on some other try hards who go and stick a tip on the other side just for looks (and made worse by people local to me who do it on shitty 4cyl cars)

back to the size of the system... for magwgn...

the flow is proportional to the square of the diameter of the pipe...

ie flow x (some constant of gas (K) ) = (diameter of pipe)²

so a 1" pipe will have a flow of 1xK, a 1.5" pipe will be 2.25xK, a 2" pipe will be 4xK and a 2.5" will be 6.25x K!!! for a twin system to equal a 2.5" pipe, you'll need pipe close to 1.75" (=3.06xK)
.... get the picture???

my brain herts 8-[

and megatron, my car was only stock but yours looked nice!!!

it must have been you pickin someone up for the strathpine communtiy hall i remember!!

Years ago ppl would do the twin 2" on the 253 holdens then go back to single 2.5" due to better flow.
With my car I am optisng to use skyline mufflers as the drone is usually caused by the after market mufflers being a too big space with no baffles so the gas suddenly expands. Baffles help stop this. On the left side I will have a lot smaller pipe as the set up will be more for looks than anything else.
Will let you know how it sounds when it is done hopfully in december.

back to the size of the system... for magwgn...

the flow is proportional to the square of the diameter of the pipe...

ie flow x (some constant of gas (K) ) = (diameter of pipe)²

so a 1" pipe will have a flow of 1xK, a 1.5" pipe will be 2.25xK, a 2" pipe will be 4xK and a 2.5" will be 6.25x K!!! for a twin system to equal a 2.5" pipe, you'll need pipe close to 1.75" (=3.06xK)
.... get the picture???
exactly what i thought. i just couldnt be bothered trying to find out the equation. thanks

well, i got it fitted anyway, the piping is split about the rear axel (where it bends over) into 2x2.25" pipes... the sound is actually slightly quiter, the actaul note hasn't changed a bit, and still has the burbly/raspy growl i love so very happy with the results, when i decide to get extractors i might think about getting twin the whole length... will prolly have to run the same route as the factory pipe (i think a gearbox mount or something gets in the way of running a pipe on the left) but there is very little difference in the length with the way it's split anyway.

but most important, it looks and sounds FU""ING SWEET!

Can't wait for the MM so we can all hear it!

-Dan

hey, i was thinking about replacing some of the other restrictors on the exhaust.. like the cat and maybe resonator... anyone tried this? what sort of results?

I'd keep both unless you mean a high flow cat. Others have said their exhaust gets drony without the resonator.

hey, i was thinking about replacing some of the other restrictors on the exhaust.. like the cat and maybe resonator... anyone tried this? what sort of results? havent done it myself, but from what others have said, it only changes the sound, with very little change in performance.....

although i would have thought the cat would change the performance a little but according to those who know, its only once you have a fully tuned machine that it becomes the weaker link! (i think what they're trying to say is that its not very good BFYB!)

It is a known fact that you can have not enough restrictions in NA cars...
So if you keep adding more and more flow you will get to the point where you are taking power away...
I would think that if you end up with a full dual system ... it will cause you to have alot less power than if you stayed with the existing system.

I was told that even a single 3" system would be a little on the large side for a turbo setup... letalone a NA setup...
If you want dual then you might find you haev to have dual 2" pipes to get the flow and power you want.
Well thats what I reckon.

Haydn

hey w1ll1am, looks pretty sweet, how much it set you back in the end?

Trav

the mufflers were $299 each, and they charged $220 to fit it... so about $820 all up..... i've heard of a lot of people paying a hell of a lot more!

with the larger exhaust, if i upgrade the fuel pump and injectors, would that help in a possible power decrease?

William, dude. Why u use turbo smart mufflers on a maggie?? My mate has one of those exact mufflers on his WRX, sounds awesome on the rex. But I personally just dont think that TURBOsmart really fits the magna image. But hey man its your car. : :D Do wot u want!! Pitty u will never get the sound the rexy produces even with two of them. :lol: Sorry man dont mean to have a go at ya. No doubt it souns good. At least with the positioning it looks like u cant read the turbosmart logo on the tip :D

hey william, is your car really as low as in your avatar? cos i'd hate to think how your two 4" tips are gonna scrape..... :cry: :cry:

interesting you say that Jdub, most people say that the closest car it sounds like is a WRX! very nice and bassy/burbly.. if only i could get the boxer growl...

and TheDifference, no the avatar is a photoshop of what it will look like..... eventually... not quite that low. i've sat the mufflers right up in the bumper, they're actually not the lowest point on the car! very handy in not attracting attention aswell... people hear it and look for the civic or rex cruising down the street and pretty much ignore the magna!! hahahaa!!

Fuel pump and injectors are fine. On other cars, when they upgrade their injectors, chances are they get Magna ones.

It is a known fact that you can have not enough restrictions in NA cars...
So if you keep adding more and more flow you will get to the point where you are taking power away...
I would think that if you end up with a full dual system ... it will cause you to have alot less power than if you stayed with the existing system.

I was told that even a single 3" system would be a little on the large side for a turbo setup... letalone a NA setup...
If you want dual then you might find you haev to have dual 2" pipes to get the flow and power you want.
Well thats what I reckon.

Haydn


That's not correct. The needing backpressure story is just B.S. The FACT is that you don't NEED a very large diameter piping on a low HP car. However, you will still gain more top end at the cost of low end. The less restrictions, the better. Restrictions are there for sound and emissions control, not performance. I know a couple people that ran open headers on their 6G72 3000GT's and gained noticeable top end pull and improved their best and average quarter mile times. Running open headers is even LESS back pressure than running 3 or even 4 inch exhaust piping. But your power band will move up so you will definitely lose low end torque. I used to run 2.5 inch piping when I was making around 300HP at the crank, but once my current buildup is finished, I will be running 3.15 inch piping.

...... I know a couple people that ran open headers on their 6G72 3000GT's and gained noticeable top end pull and improved their best and average quarter mile times.

Arnt these turbo Cars?

Haydn

ive actually heard that aswell... coz really the more flow, the more efficient the system will be.. therefore, no exhaust=max flow? and actually i have found that my car now seems to breathe a bit better at top end.

Excuse my ignorance, but why does an engine need back pressure from the exhaust?

[quote:9f852c7d6f="Sam6G72"]...... I know a couple people that ran open headers on their 6G72 3000GT's and gained noticeable top end pull and improved their best and average quarter mile times.

Arnt these turbo Cars?

Haydn[/quote:9f852c7d6f]

There are factory turbo 3000GT's(GTO) known as VR4's, but I was talkin about the NA models.

There are factory turbo 3000GT's(GTO) known as VR4's, but I was talkin about the NA models.

Oh ok....
Because I know that on alot of the turbo cars... the bigger or NO exhaust is better... I thnik that the only reason they have exhausts is to direct the fumes and geat away from the car...
Haydn

And that's what the law stipulates.

saw a green magna with a twin setup, looked schmik ;)

and thats what its allllllllll about :)

saw a green magna with a twin setup, looked schmik ;)

yeah he lives down the end of my street, haven't gotten 2 speak 2 him though coz i'm pretty sure he works afternoon shift... might leave a flyer on his car or something