not so Mr. Ho!

here!

I was looking at der uber muffler that seems to be favored by FC and FD guys.

 

Oh, true enough. I guess the guts of that muffler are proprietary or somesuch. The muffler I'm using is one of the Turbo line, which is a straight through design.

Here's a sound clip of the finished product:

http://members.shaw.ca/deuteronomy/Borla.mp3

And here's an admittedly poor recording of my exhaust with just the RB header/presilencer and the Magnaflow muffler:

http://members.shaw.ca/deuteronomy/DSCF0105.WAV

Now with the Magnapack resonator installed it wasn't nearly as loud as that, but the harshness of the tone was still present and it wasn't nearly as bassy as the Borla.

Next week I'm going to post some clips of my car with open headers, then headers plus my mid-section which has the RB mini-presilencer and the Magnapack and then the whole product. I reused my old gaskets when I put this together and they didn't seal, so I have to take it apart again and install new ones. Good thing the whole assembly is flanged for easy disassembly! It's amazing how much the RB silencer does for the exhaust note: it's probably 50% responsbile for the bassy tone.

 

It does sound pretty good. I can hear the filter element sucking air in, in the background, as you take your foot off the gas.

I guess we'll just have to see how my exhaust turns out. I only need another $450 for the midpipes and the muffler. I only have a Rotary Engineering header right now.

 

This deserves its own post, even if I can edit the last one.

The Magnaflow muffler is:
p/n 14589 and measures 5" x 11" x 22" (offset center)
inside


The Borla muffler is an XR-1 Sportsman Oval:
p/n 40944 and measures 4.5" x 7.9" x 16"
inside


The magnaflow is 21.6lbs
The borla is 9lbs

Goddamn that is amazing. That was pulled from a BMW page. I was also perusing a Corvette forum where some rich guys dyno'd a ton of mufflers and the Borla was quieter and more free flowing than the magnaflow.

I'm honestly sold on a borla muffler now.

 

Got a link for the 'Vette forum? I'd like to see the comparisons.

 

I was previously wrong on what I said. The Borla XS is quieter and more powerful than the Magnaflow series. The XR-1 scored lower on this test. http://www.borla.com/proxs/

From what I gather the XR-1 is race, the XS is street, and their normal Turbo line is an off the shelf upgrade from stock.

Yeah, I was just browsing again and I found the same exact thing copied and pasted on a Mustang forum.

I guess we're behind on the trends.

http://dodds.cc/chad/garage/z28/ls1_sounds/faq.htm

Benchflow tests


All tests via an independent lab
All tests @ 15” wc

2 “ Straight Pipe 283 CFM
2 ¼ “ Straight Pipe 365 CFM
2 ½ “ Straight Pipe 521 CFM

2 ¼” Typical Bent tailpipe 268 CFM
2 ½” Typical Bent Tailpipe 417 CFM

2 ¼” Inlet/Outlet_ Glass Pack Tips- No Louvers- Smooth 274 CFM
2 ¼” Inlet/Outlet- Glass Pack Tips-Louvered 133 CFM
Same as above set for reverse flow 141 CFM
2 ¼” Cherry Bomb 239 CFM
2 ½” Cherry Bomb 294 CFM

2 ½” Inlet/Outlet Dynomax Super Turbo 278 CFM
2 ½” Inlet/Outlet Ultraflow Bullet 512 CFM
2 ½” Inlet/Outlet Gibson Superflow 267 CFM
2 ½” Inlet/Outlet Flowmaster ( 2 Chamber) 249 CFM
2 ½” Inlet Outlet Flowmaster ( 3 Chamber) 229 CFM
2 ¼” Inlet/Outlet Thrush CVX 260 CFM
2 ½” Inlet/Outlet Maremount Cherry Bomb 298 CFM
2 ½” Inlet/Outlet Hooker Aero Chamber 324 CFM
2 ½” Inlet/Outlet Hooker Max Flow 521 CFM
2 ½” Inlet/Outlet Borla Turbo 373 CFM
2 1/2" Inlet/Outlet Magnaflow 284 CFM

Standard OEM 2 ¼” Inlet/Outlet 138-152 CFM
Standard OEM 2 ½” Inlet/Outlet 161-197 CFM

This test was performed by 5.0 Mustang & Super Fords Magazine, December 2002 issue (page 55) on a '90 Mustang LX coupe with 370hp and 11 second potential. 66 pulls were made for this comparison:

The results in HP order:
1.Flowtech Warlock (open) 374.2 hp/ 333.1 tq
2.Bassani Real Street 373.7 hp/ 333.8 tq
3.Hooker Maxflow 373.5 hp/ 333 tq
4.Borla XS 373.3 hp/ 332.6 tq
5.Magnaflow 372.8 / 332.5 tq
6.MAC 372.3 hp / 331.5 tq
7.Flowtech Afterburner 372.3 hp/ 330.1 tq
8.Hooker Aerochamber 372.1 hp/ 330.4 tq
9.Bassani 372 hp/ 333.5 tq
10.Spintech 371.6 hp/ 332.2 tq
11.Edelbrock Performer RPM 370.9 hp / 331.3 tq
12.Borla XR1 370 hp/ 334 tq
13.Flowtech Terminator 369.5 hp / 331.3 tq
14.Dynomax Ultra Flo 369.4 / 333.2 tq
15.Flowmaster 369.4 hp / 331.8 tq
16.Flowtech Warlock 366.3 hp / 325.3 tq
17.No muffs 365.2 hp / 330.1 tq

Sound Off in Quietest to Loudest (Decibels):
1.Borla XS, 80db at idle, 90db at 2,000 rpm, 110db at WOT.
2.Hooker Maxflow, 80db at idle, 90db at 2,000 rpm, 120db at WOT.
3.Magnaflow, 82db at idle, 91 at 2,000 rpm, 114db at WOT.
4.Flowmaster, 82db at idle, 93 at 2,000 rpm, 115db at WOT.
5.Flowtech Warlock, 83db at idle, 92 at 2,000 rpm, 112db at WOT.
6.Dynomax UltraFlo, 83db at idle, 94 at 2,000 rpm, 113db at WOT.
7.Borla XR1, 83db at idle, 96db at 2,000 rpm, 118db at WOT.
8.Bassani Street, 83db at idle, 96db at 2,000 rpm, 120db at WOT.
9.Edelbrock RPM, 84db at idle, 93db at 2,000 rpm, 118db at WOT.
10.Bassani Real Street, 84db at idle, 96db at 2,000 rpm, MAX. (120+db).
11.Flowtech Afterburner, 86db at idle, 94db at 2,000 rpm, 115db at WOT.
12.Flowtech Terminator, 86db at idle, 94db at 2,000 rpm, 119db at WOT.
13.Hooker Aerochamber, 87db at idle, 94db at 2,000 rpm, 114db at WOT.
14.SpinTech, 87db at idle, 97db at 2,000 rpm, 116db at WOT.
15.MAC, 87db at idle, 98db at 2,000 rpm, 119db at WOT.
16.No Muffler, 91db at idle, 103db at 2,000 rpm, MAX. (120+db).

 

So according to the benchflow test your Borla beats the magnaflow by almost 100, which I find kinda amazing.

So if I want to play it safe, off the shelf Borla Turbo or Turbo XL, but I'm still enticed to check out the ProXS series. Even if the ProXS is the "budget" series.

 

So the Borla flows nearly a third again better than the Magnaflow AND is half again as quiet?

Cool.

 

Flow rate aside, you now have my attention.

 

Took a ride in Matt's car today (he was kind enough to drive me to the store while I had my airbox, brackets, and half my loom apart) and his exhaust sounds great. Very understated.

I still like my full RB system though.

 

its matty....not matt *lol*

 

No Thats me lol

Im interesred about this now!

I have a full RB Streetport Setup rigth now. I love it dont get me wrong. Nice Great sound. Good deep tone. Loud when you stomp on it, low noise when your rollin in the city.

But you have got my interested now. I will probably stick with my full RB, but Im always open to new ideas.

 

The pricing of Borla mufflers and their wide range makes it a hard decision, though.

Hey, Moses. Could you measure the length of your muffler? The Turbo series is 13 and 14 inches long and the Turbo XL is 19 inches long. The Pro XS line is also both 14 and 19 inches long.

I'm going to focus on the Turbo/XL/ProXS lines because the XR-1 probably won't muffle much for us.

 

I've got the Borla Turbo, PN: 40652, so it's 13.25 inches long and 4 x 9.5 inches height/width. 2 1/4 inlet/outlet.

I bet the XL would be even quieter thanks to the much longer case.

 

The longer case would make it quieter... but that's also where the price jumps around.

-Your muffler new is $77.45 on ebay.
-The same muffler but with a 19 inch long case is $139.93, also the cheapest found on ebay.
-The only muffler in the ProXS range with a 19 inch case is the dual outlet PN 40348, and also on ebay I found it for $86.61. 2 1/2 inlet and dual 2 1/2 outlet.

I would jump to get the ProXS, because on the chart above it preforms better than the Magnaflow, but its flow rate is unknown. I would assume it flows between the magnaflow and the normal Turbo XS It is made the same exact way as all the other mufflers or is it? Either A. it is packed with steel wool, or B it is made in a third world or communist nation with cheaper labor for cheaper sale.

Either way, they all maintain the same warrenty.

 

Thank you for contacting BORLA PERFORMANCE. The Pro XS muffler is built I dentical to the Turbo and the XL series mufflers. Everything from the inside and out. The only difference is that on the muffler is that it is stamped with Borla Pro XS. This muffler also comes in a far wider verietty of sizes and lengths. Also this muffler is only sold through certain retail stores you can not buy this muffler through Borla direct. The reason for the price difference is that we mass produce this muffler for sale to large retail stores and many muffler shops. They are sold in large amounts so we can offer them for a cheaper price. You can not just buy one from Borla you would have to buy about 25 to 50 to buy them from Borla. If you have additional questions regarding Borla exhaust check out our web site www.Borla.com you may contact me Direct anytime Mon-Fri 8:30-5:00 PST with questions or concerns

Regarding our products.







Thanks



Tim Youmans

 

That sounds like a group buy.

What would go into making a custom exhaust thats quiet?

What if after the racing beat header you went with something like 3" untill the rear section of the exhaust. Then use regular size to the muffler and out? Would something like that make it quiet?

How do presilencers do?

 

Well I do have the guy's phone number.

And they would be about 50-60 a piece theoretically if we went in on the group buy, although I didn't ask him about that. I just asked him why they were so much cheaper.

As opposed to $86 on ebay for PN-40348 Pro XS 2 1/2" DUAL 2 1/2" 19" 4" 9 1/2

Its not a big savings, but hey, do whatever you guys want. I just know how to get through to people.

 

The only thing I am worried about is the sound level. When you make a recording you not actually hearing the noise come out of the exhaust, it has to travel through you computer components and then into your ear. Basically even though its got a nice rich tone, does it sound loud when you got certain mods like direct ignition and ported engine.

Can't you just eliminate your cats, use a header, and like 2 mufflers in series? You know what I am saying.. one of those cylinder type mufflers that will fit under your car. You can route it so that its after the cat? I wonder if that will quite a bridge port.







(ps how do you change the line under your name?)

 

Well its under User CP and its a profile option, just uncheck the box and type your custom user title in.

Yes, most people on here use a header and two mufflers. It should be fine on a bridgeport, Nector has been using a bridgeport for his DD.

They are the quietest muffler on the market out of those tested on the tests I cited.

 

You can use two straight through mufflers in series. That's about the only way to quiet a ported motor down to semi-reasonable levels while still making good power. My friend builds n/a motors that make about 300rwhp and the exhaust setup is long primaries to the diff, a large straight through muffler in the stock position then a round straight through muffler running across the back of the car under the bumper. I think it looks pretty sweet but you can also do it like you said and just have shorter primaries.

 

wow 300 hp N/A geezzee.. i need to rob a bank soon. (for homeland security i am j/k)

I guess they sell couplings that enlarge/reduce to the diameter of the muffler exhaust. I can not wait till tomorrow. This should be a good long study/search opportunity. I don't even know the size of the stock exhaust. I did find out that to buy a flange for the RB header that I got cost 22 dollars (shipping) I can call them tomorrow(RB) but I wonder if I can get these answer now?

Would the collector thing.. Unflanged Collector Assembly Part Number: 16004 be the part that I need to mate the header to the exhaust?



thanks guys.

 

If you have the dual outlet header, that is the part you need.

 

Is anyone gonna set up a group buy on the mufflers above or is it better to just surf eBay?

 

Go on Ebay. I really doubt we could get 50 people for the same exact size muffler.