5.0 Exhaust Thread

[Trolling]

you have pretty grippy tires.. the new michelin m/s ltx's i have are spin happy especially when i rev it a bit for a launch..

the 50 flowies kinda sound loud.. anybody have a 70 series on a 5.0 with headers? i just want a mellow rumble

 

[celly]

yes I have my headers on.

Nice to hear (literally/figuratively).

 

[Wray-Wray]

i have stock manifolds down tubes stock primary and secondary cats from there i have 2.5inch stainless steel mandrel bent tubing to dual cherry bombs accompanied by more mandrel bent tubes out two 2.75inch by 10inch megaphone tips sounds absolutely wonderful all welded no muffler clamps

 

[CDW6212R]

i have stock manifolds down tubes stock primary and secondary cats from there i have 2.5inch stainless steel mandrel bent tubing to dual cherry bombs accompanied by more mandrel bent tubes out two 2.75inch by 10inch megaphone tips sounds absolutely wonderful all welded no muffler clamps

I'd like to hear that, if the mufflers are the Vortex like I bought, and the tips don't make that ricer bellowing sound. I think those are a quiet muffler, but I know Cherry Bomb has a few others which are louder.

 

[Fifty150]

My rear cats are history. No problems at all. The rear o2 sensors are upstream of them.
However-the rear o2 sensors do monitor the front cats.

Kind of confusing isn't it?

Do you have emissions testing?

 

[Fifty150]

What exactly will removing these secondary cats do? Is is a sound difference? Performance change? Both?

It helps clean up what got past the first set of cats. In states where the smog inspection includes putting a sensor into the tailpipe, then you may have an issue with higher amounts of pollutants coming out of your tailpipe.

My pickup truck only has 2 OEM cats, as opposed to 4. But then again, there are too many variables to consider with how these things were engineered, and what your state finds to be acceptable.

Yes, there is a sound difference. Your car will sound different, and most likely louder. But your cats are not really there to make the car quiet. Your resonator and muffler is what is suppose to make your car quiet. You will see some performance gain due to the fact that your exhaust will now be less restrictive.

 

[CDW6212R]

... You will see some performance gain due to the fact that your exhaust will now be less restrictive.

FYW, the lower restriction(good thing) leans the mixture, improving power up to the point where it becomes too lean. If enough restriction is removed(good thing), then the extra lean mixture needs more fuel, which is done in the PCM for WOT. That's why minor changes almost always help, but beyond a certain amount people feel a loss(which is the too lean condition). Retuning the fuel mixture is the answer.

 

[00SVT]

Me being new to the Explorer crowd. I just read through all 15 pages and now I am wanting a set of TM headers for mine now. But having a project Truck won't allow that as that is were most of my Mod. money goes. Still may pick up the Mac Catback as the few clips I heard on youtube it sounds pretty good compared to the Flowmasters.

 

[Trolling]

Anybody here with TM headers, CAI, 1" spacer, stock cats and a 70 SERIES Flowmaster?

 

[Fifty150]

My "home made" or "self engineered" catback exhaust system started off with cutting off and removing everything from the 3 bolt flange that meets the catalytic converters. A Magnaflow Y-Pipe (part no 10758) was welded onto the mounting plate. The y-pipe is a dual 2.25" inlet to a single 2.5" outlet. This was followed by a Holley Flowtech Red Hots Glass Pack Muffler (PART #: 50252FLT). The exhaust exits through a 2.5" Walker Exhaust 46909 Dynomax Intermediate Pipe.

 

[Afboy143]

My "home made" or "self engineered" catback exhaust system started off with cutting off and removing everything from the 3 bolt flange that meets the catalytic converters. A Magnaflow Y-Pipe (part no 10758) was welded onto the mounting plate. The y-pipe is a dual 2.25" inlet to a single 2.5" outlet. This was followed by a Holley Flowtech Red Hots Glass Pack Muffler (PART #: 50252FLT). The exhaust exits through a 2.5" Walker Exhaust 46909 Dynomax Intermediate Pipe.

Very nice- this is what I did with my 4.0 with the magnaflow Y when I had my stock pipes. How's it sound?

 

[Fifty150]

At idle and while cruising, there is a soft, deep, low rumble. If I floor it, it gets louder. The important thing is that the straight through design allows for better flow.

 

[Afboy143]

At idle and while cruising, there is a soft, deep, low rumble. If I floor it, it gets louder. The important thing is that the straight through design allows for better flow.

I hear you. About a year ago there was a article floating around different flow through mufflers and which yielded the most HP on a 5.0 mustang I believe. Due to this article, I chose to put a Hooker MaxFlo on my explorer (4.0) due to it have the best price to HP gain ratio. The 4.0 sounded good, but didn't have the deepness as the flowmaster. I decided to throw the Flowmaster back on

 

[Fifty150]

Those articles usually compare chambered mufflers. With a straight through glass pack tube design, it's pretty simple: your flow is only restricted by the smallest opening. It seems to me that most people care more about what the exhaust sounds like. Performance is secondary. I've always been a fan of straight through exhaust systems because they minimize backpressure allow for the best flow. If you don't care about any of that, then sound can easily be achieved with a Flowmaster chambered muffler and a big tip on the end of your tailpipe.

 

[Afboy143]

Those articles usually compare chambered mufflers. With a straight through glass pack tube design, it's pretty simple: your flow is only restricted by the smallest opening. It seems to me that most people care more about what the exhaust sounds like. Performance is secondary. I've always been a fan of straight through exhaust systems because they minimize backpressure allow for the best flow. If you don't care about any of that, then sound can easily be achieved with a Flowmaster chambered muffler and a big tip on the end of your tailpipe.

Actually the chart does have other types of mufflers, but a lot of flow-through as well. See below

http://www.explorerforum.com/forums/showthread.php?p=1891671

I totally agree with you on power over sound; however, I dont want my truck sounds like a fart can so I can gain 1 hp or 2 .

Edit: Was looking on another forum. Found this

2 ½” Inlet/Outlet Hooker Max Flow 521 CFM
2 ½” Inlet/Outlet Flowmaster ( 2 Chamber) 249 CFM

Lot of CFM sacrificed in the name of sound! Full chart below

The Mufflers
MAKE MODEL Part No. COST
SUMMIT Turbo 630125 $14.75
THRUSH Magnum Glasspack 24214 $16.50
THRUSH Boss Turbo 17718 $23.95
HOOKER Competition 21006 $25.95
DYNOMAX Super Turbo 17733 $28.50
DYNOMAX Race Magnum 24215 $31.95
HOOKER Super Competition 21106 $35.95
SUMMIT Fully Welded 630325 $38.69
FLOWTECH Afterburner 50322 $39.95

MUFFLER FLOW TEST

MUFFLER Flow at 28-in H20
DynoMax Race Magnum 528.64 cfm
Thrush Magnum Glasspack 507.40 cfm
Summit Fully Welded 343.38 cfm
Flowtech Afterburner 342.20 cfm
DynoMax Super Turbo 333.94 cfm
Hooker Competition 232.46 cfm
Hooker Super Competition 320.96 cfm
Summit Turbo 331.16 cfm
Thrush Boss Turbo 297.36 cfm

MUFFLER Idle dB WOT dB
DynoMax Super Turbo 89 123
DynoMax Race Magnum 94 133
Flowtech Afterburner 92 124
Hooker Competion 92 122
Hooker Super Competion 90 125
Summit Turbo 89 124
Summit Fully Welded 92 125
Thrush Boss Turbo 90 123
Thrush Magnum Glasspack 92 128

DYNO TEST
All mufflers were dyno-tested on a 355-cube SBC with 10.0:1 compression, Air Flow Research 190 aluminum heads, a CompCams 292 hyd. a Victor Jr. intake, a Holley 750-cfm double-pumper, and 1 5/8 Headman headers.


MUFFLER HP TORQUE 2,500-6,000rpmAverage
Hooker Competition 397.4 381.1 286.8hp/351.9 lb-ft
Thrush Boss Turbo 407.1 384.9 292.1 hp/357.5 lb-ft
DynoMax Race Magnum 409.5 394.3 298.8 hp/366.9 lb-ft
Flowtech Afterburner 409.7 391.2 294.8 hp/361.7 lb-ft
Thrush Glasspack 409.5 389.8 297.7 hp/365.3 lb-ft
Summit Turbo 411.5 386.3 291.5 hp/357.4 lb-ft
DynoMax Super Turbo 412.7 387.2 292.6 hp/358.6 lb-ft
Hooker Super Comp 413.8 387.2 292.8 hp/359.0 lb-ft
Summit Fully Welded 415.4 390.7 295.6 hp/362.4 lb-ft



more numbers for ya'll who like numbers.

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

 

[Fifty150]

http://www.explorerforum.com/forums/showthread.php?p=1891671

I didn't see the Cherry Bomb glasspack or the Holley Red Hots on their list.
By design, I tend to favor these two. To me, and I know most of you will disagree, unless it's a nice, quiet, restrictive OEM system, then it's all going to be loud rumbling. Now some rumbling is louder than others. But if I didn't care about performance, I would stay with OEM tuning for doise dampening. I was surprised at how well the Summit Racing brand held up against the other "name" brands.

 

[Afboy143]

I didn't see the Cherry Bomb glasspack or the Holley Red Hots on their list.
By design, I tend to favor these two. To me, and I know most of you will disagree, unless it's a nice, quiet, restrictive OEM system, then it's all going to be loud rumbling. Now some rumbling is louder than others. But if I didn't care about performance, I would stay with OEM tuning for doise dampening. I was surprised at how well the Summit Racing brand held up against the other "name" brands.

Actually if you look at the numbers of the Hooker Maxflo, you'll see that you can have nice and flow through with minimal noise Many mustang guys actually complain they are so quiet, but like them because of the CFM flow rate. I can attest to how quiet they are, especially if you're running cats.

 

[Fifty150]

I guess I'm just not a connoisseur of noise coming out of tailpipes. I've never really been fascinated by exhaust tones. That's probably why I laugh at my friends with little import sub-compacts. They have loud exhaust notes, but only make 130-140 HP. I keep telling them that stickers, tinted windows, rims, and beat can't turn a 1.8L engine into a muscle car.

 

[6thirty6]

do those magnaflow y pipes direct fit up to the stock 2 pipes? as far as same distance apart from eachother?

 

[Fifty150]

do those magnaflow y pipes direct fit up to the stock 2 pipes? as far as same distance apart from eachother?

On my car, they lined right up.