| Author | Message | ||
     Xl1200r |
I'll try to keep this short and to the point. I'm thinking about buying a new car, and if I do, I'll be ending a 5 year haitus from V8s. And what good is a V8 without a proper exhaust? That said, I like my neighbors and my neighbors like me, so I'd like to be able to turn down the volume if I leave early in the morning or come home late at night. These mufflers got me thinking:  They're basically just a bullet-style glass pack with a butterfly. When it's closed, it forces the exhaust through the perforations in the core and through the packing before it can exit the muffler. When opened, it's a flow-through design. All controlled with an electric servo and a switch inside the car. Bad news - they only make it in a 2.5" inlet/outlet size, and they have no plans to change that. The car I'll have will be running 3" exhaust. Option two, same idea, but a little more technical in that the exhaust isn't blocked off, but actually changes paths and chambers in the muffler: These are offered in a bunch of sizes, both round and oval, and without the stupid tips if you don't want them. There are some videos of these on V8-powered Vauxhauls and sound great. Bad news again - It's an Australian company and I can't find a U.S. distributor. So, last option I'm thinking of is those electric exhaust cut outs: Except here's the difference I'm thinking... Instead of just dumping them out like in the video above, essentially making a quiet exhaust into a loud one, I was thinking of putting them in line in the exhaust with holes drilled into the flap to quiet down a loud exhaust. Essentially, you'd have an on-demand "quiet insert" like Jardine (and some other muffler brands) use, like these:   Does anyone have experience with these kind of quiet inserts and do they make a difference? I'm only going to use these at idle and light throttle openings, so I'm not all that concerned with super-high flow capabilities. Any input appreciated. | ||
| Badlionsfan |
Summit racing sells exhaust by pass cut outs that are servo controlled, and I'm sure they have bigger than 2.5". Also, that jardine silencer does work, takes the edge of the exhaust note. Downside is it does effect power some what. | ||
| Xl1200r |
Bad - yes, they do. I didn't explicitly say that, but my thinking was to get a pair of 3" electric cutouts, put them in-line with the exhaust and drill holes in them similar to the jardine or the X patterned one above. So even when they're closed, exhaust can still flow through but will hopefully be quieter. | ||
| Badlionsfan |
If you put them far enough back you may not need any silencing on the open side. I used to work with a guy that had a chevy truck that he eliminated the muffler with a piece of exhaust pipe and left the rest of the system as stock. It wasn't really that loud, had a sweet rumble to it tho. I say run the cut outs right before the muffler(s) and try it out before you dump a bunch of time and money figuring out something that you may not need. | ||
| Xl1200r |
You're right, without mufflers, most new cars aren't terribly loud. There are typically resonators further upstream as well as the cats which block a TON of sound. I've thought about putting dumps in front of the mufflers, but that would essentially be a "muffler delete" kit, and on this car (new 5.0L DOHC Mustang) they sound really bad. There's a cat-back kit I really like - who knows, it may be quiet enough to be okay at idle and such, but in case it's not I've been occupying the winter-time with this in my head. My thinking is to put these in-line with the new cat-back. | ||
| Badlionsfan |
What system ya looking at? I spent 6 years at Summit selling crap for 5.0 Mustangs. | ||
| Xl1200r |
MUCH different 5.0 - new modular engine, 4 valve heads, DOHC, twin independant cam variable cam timing, etc etc. Totally new. It's not a bigger 4.6 or a smaller 5.4. Pypes has a system I really like. I've read quality was hit or miss in the past but supposedly much better now. It's a cat-back system that basically uses their M80 mufflers mounted in front of the axle, and pair of nice resonator tips. Every other system on this new engine either sounds very "thick" (loud but over-muffled - Magnaflow is the worst of them, but bassani is the same) or very "farty" (Roush, most any muffler delete, Hushpowers, even Borla's S-type and ATAK, etc). http://www.pypesexhaust.com/sys-mustang2.html | ||
| Crackhead |
I hope Ford does a modern SVO with 3.5L Ecoboost. But they might not do that bc it would put the 5.0L to shame. | ||
| Xl1200r |
I hope Ford does a modern SVO with 3.5L Ecoboost. But they might not do that bc it would put the 5.0L to shame. Shame? The 3.5 V6 ecoboost is almost 50hp and 40 lbs/ft down from the 5.0 V8, which is widely reported to be conservatively rated. It'd be close, but no shaming. I think the reason they won't do it is the base engine is now a 3.7 V6 making 305hp and getting over 30mpg, and the cost involved in building a turbo'd V6 would likely be on par with the V8 and get the same mileage. | ||
| Fast1075 |
Cutouts and dump pipes sound like crap...like a BRAPPPPBBBRRAPPPPPPPPP you know  Put an X pipe system in with a set of dynomax mufflers...it will sound SOOOO sweet...nice deep rumble but not offensive and the X pipe will make it sound like it is turning a lot of rpm when you put a boot to it. Don't be a BRAPPPPPP...BRAPPPPPP..BRAPPPP  | ||
| Ratbuell |
I ran an SLP Loudmouth II exhaust on our Hemi Magnum, and LOVED IT. Snarled like nobody's business when you whacked it, but purred like a kitten (a BIIG kitten!) if you were behaving yourself. Stock cats in place, it deleted the factory rear resonators (just under the rear bumper) and replaced the main mufflers mid-car with resonators that were similar to the glasspack-style pictured above. And, I run all my turbo cars with no mufflers at all. Cat only, for backpressure to help with boost control. | ||
| Ridenusa4l |
xl1200r- how you likin that new 5.0??? you got a stick or auto?? i am SOOO jealous!! i often dream bout havin a new 5.0....one day ill have one and many other funstangs  lol Jake | ||
| Crackhead |
The F150 EcoBoost version makes 365 hp (272 kW) @5500 rpm, 420 lb·ft (569 N·m) @1700-5000 rpm. Where it puts the 5.0 to shame is the power under the curve. The tq is a landing strip instead of a curve. | ||
| Xl1200r |
xl1200r- how you likin that new 5.0??? I don't have it yet, waiting for my annual review with work at the end of next month. Unless I get fired or demoted, I'll be putting an order in. Can you believe they're already building 2012s? The F150 EcoBoost version makes 365 hp (272 kW) @5500 rpm, 420 lb·ft (569 N·m) @1700-5000 rpm. Where it puts the 5.0 to shame is the power under the curve. The tq is a landing strip instead of a curve. I didn't find that tq number when I looked before but it appears you're correct. In that case, it does make more tq, especially down low, than the Mustang's 5.0L. But, keep this in mind... the 5.0L in the F-150 is a $1,000 option. The EcoBoost V6 is a $1,750 option, making the twin-turbo setup more expensive to build than even a high-feature V8 like the 5.0L - that doesn't really put it at "underdog status" anymore. And also keep in mind that the truck-tuning that gives that massive torque probably wouln't make it into a car (truck engines in cars don't work well) - otherwise, I think we would have seen it in the new SHO and Lincoln MKZ or MKR or whatever it is. Also of note are two things - the 5.0L is getting a "special edition" revamp in the name of the 2012 Boss 302, which has a new intake manifold and cams, and while it looses a little on the bottom, it's bumped to 440hp. And on top of that, the 3.5L is already boosted, so when it comes to hot rodding, you can easily still bolt on another couple hundred horesepower to the 5.0L (Ford even sells supercharger kits that bump output to 625hp). For a real shot an SVO edition (I'm not opposed to the idea, I just really want a V8 this time), wait for 2014. Rumor is the Mustang will be on a new platform for it's 50th anniversary - smaller and lighter and stepping away from the retro styling. Smaller and lighter will lend itself well to alternative powerplants, and I think a boosted 4cyl wouldn't be out of the question at that point. | ||
| Xl1200r |
Ratbuell - so many cars sound GREAT with opened up exhausts, and that Hemi is a great sounding engine to start with. Unfortunately, I think it's a combination of the 4 valve heads and variable cam timing on this new 5.0L that just make it sound bad with so many exhausts. The system I'm looking at basically does a swap of the exhaust system. It replaces the mufflers at the back with long reonators in the tips, and replaces the resonators in the middle of the car with flow-through mufflers. It really has a unique sound compared to anything else I've heard on it. This 5.0 sounds completely different from the 4.6 it replaces. | ||
| Crackhead |
The SHO, Flex and Lincoln's don't have the massive tq numbers because the trany will not be able to take it. The EcoBost in the F150 is also under rated. After the F150 torture test the motor still put out the quoted power. I suspect the Mustang version will have different turbos giving up some of the low end tq but giving big upper power boost. | ||
| Geforce |
My 87 GN has an electric dump for any encounters requiring additional power. It's mounted directly off the down pipe at the dump Y itself. If it's closed the exhaust goes through my Magnaflow cat back system. I like it for the track. | ||
| Augustus74 |
They are expensive but check out Billy Boat exhausts. | ||
| Xl1200r |
$1000 for a pair of mufflers? I don't think so. | ||
| Sparky |
FWIW, I've been kicking around an idea for modding the SuperTrapp muffler on my S1 by adding an e-cutout butterfly to replace the Trapp's closed end cap in order to have a quiet system for normal riding but having an open exhaust capability for full throttle situations when needing more power. It might work perfectly if I can tie the e-cutout to the switch in the VOES. |
