5.0 straight exhaust
- Thread starter redlined94
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VIPERn94Five-0
Founding Member
check out the muffler shootout in the FAQ...no mufflers made the LEAST power out of all the combos....and they sound like poop!
Anthony
Anthony
xsivpwr
Founding Member
Viper's right,
The previous owner of my stang had a custom exhaust made of 4 cats, and then straight pipes exiting out the sides before the rear tires... Was kinda cool at first, but the first time going through town trying to keep it quiet... Not worth it. They are just too freakin loud and they dont have a good note to them either. Its just well... poop
The previous owner of my stang had a custom exhaust made of 4 cats, and then straight pipes exiting out the sides before the rear tires... Was kinda cool at first, but the first time going through town trying to keep it quiet... Not worth it. They are just too freakin loud and they dont have a good note to them either. Its just well... poop
I see what you guys are saying but I just dont have the money to buy some top dollar Bassani system. I got my flowmasters for like 260 bucks(cat back). I was just wanting something loud and sounded nice at the same time. I would LOVE to have the new SLP cat back system for my stang but it is double what i paid for what i have now.
VIPERn94Five-0
Founding Member
SLP will make your car sound like a chevy truck....i think they sound awful....and straight pipes will make the least power and sound the worst...redlined94 said:
Anthony
jmoore16
New Member
Did see a power improvement...
We swapped from Flowmaster 2 chambers to straight pipes on a carb'd race car and we did see a power improvement after we re-jetted.
I haven't seen the power numbers on this site but wonder if calibration or jetting was optimized for each muffler?
I had straight pipes on my '67 street car and it sounded like mung until I added a balance tube. After that, it sounded like a Nascar stock car. Great but not too practical...
Ended up adding cherry bombs to drop the sound a little.
We swapped from Flowmaster 2 chambers to straight pipes on a carb'd race car and we did see a power improvement after we re-jetted.
I haven't seen the power numbers on this site but wonder if calibration or jetting was optimized for each muffler?
I had straight pipes on my '67 street car and it sounded like mung until I added a balance tube. After that, it sounded like a Nascar stock car. Great but not too practical...
Ended up adding cherry bombs to drop the sound a little.
squall9393
New Member
If straight pipes from the cats made the least power then why did the Warlocks with no plugs rate highest in the FAQ? I bought those based off of the FAQ and they seem ballsy and loud enough to merit as a low cost keeper for now.VIPERn94Five-0 said:
My_Little_Pony
New Member
Why would straight pipes make your car slower??? That makes no sense at all!! 
When you go to look for performance exhaust, each company, says "this is our top of the line model, it's basically straight through pipe". So, if they are basically building a straight through muffler, then what is the difference??? The reason for doing exhaust is to open up your air flow. All the muffler does is quiet your car down and to quiet it down, you have to restrict air flow. When you look back in the days (and lots of people still do it), they had a thing called "Lake pipes", which were basically a side exiting pipe that came straight off of your headers. People would put caps over them for driving around on the streets, then when they went to race, they would pull off the caps and let the air exit out sooner (right after the headers, "lake pipes" came out RIGHT behind your FRONT tires). That would mean they don't even have cat's or a muffler, but they were doing this for horsepower increases.....so, this whole horsepower/torque loss thing is kind of fishy. I had a 95 Lightning that had straight pipes coming out infront of the rear tires, I seemed to have GAINED horsepower.....I do believe if you don't do the exhaust right, yes, straight pipes will decrease horsepower. What you want to do, to compliment your straight pipes, is get your car re-tuned after the installation.....cause your going to be running a little leaner, your Air to Fuel ratio is going to be a little off (due to more air). As for the sound, yes, I totally agree it is pretty fricken loud. So, if you don't like the sound of a very loud rumble and if you take a lot of road trips, probably not a good idea. Well good luck with your exhaust and let us know what happens!!
When you go to look for performance exhaust, each company, says "this is our top of the line model, it's basically straight through pipe". So, if they are basically building a straight through muffler, then what is the difference??? The reason for doing exhaust is to open up your air flow. All the muffler does is quiet your car down and to quiet it down, you have to restrict air flow. When you look back in the days (and lots of people still do it), they had a thing called "Lake pipes", which were basically a side exiting pipe that came straight off of your headers. People would put caps over them for driving around on the streets, then when they went to race, they would pull off the caps and let the air exit out sooner (right after the headers, "lake pipes" came out RIGHT behind your FRONT tires). That would mean they don't even have cat's or a muffler, but they were doing this for horsepower increases.....so, this whole horsepower/torque loss thing is kind of fishy. I had a 95 Lightning that had straight pipes coming out infront of the rear tires, I seemed to have GAINED horsepower.....I do believe if you don't do the exhaust right, yes, straight pipes will decrease horsepower. What you want to do, to compliment your straight pipes, is get your car re-tuned after the installation.....cause your going to be running a little leaner, your Air to Fuel ratio is going to be a little off (due to more air). As for the sound, yes, I totally agree it is pretty fricken loud. So, if you don't like the sound of a very loud rumble and if you take a lot of road trips, probably not a good idea. Well good luck with your exhaust and let us know what happens!!
VIPERn94Five-0
Founding Member
the problem is this....on a close to stock car, or even mildly modified(my mods etc) straight pipes are gonna give you no back pressure at all....this can be good for top end power because it allows flow in the upper RPM's(our stock shortblock could never rev high enough to see the advantages, if they are even there)...but to make the power down low to get off the line(and driving around on the street)you need backpressure to help with downlow torque, so with no backpressure its gonna be sluggish in the low to mid RPMs and in turn slower....now on a boosted application(turbo, blower) they might help because the compressor is forcing more air into the motor, so you want the exhaust out of there as fast as possible...94-95's are not 67 Mustangs...if it worked on the old carbed cars thats fine...but it DOESNT WORK HERE....and just because a muffler is a "straight through" design doesnt mean its a straight pipe...sure its not chambered so it does flow much more freely than a chambered muff like a flowmaster but it still creates back pressure....My_Little_Pony said:Why would straight pipes make your car slower??? That makes no sense at all!!
....someone mentioned dumping the exhaust right after the headers...you go buy long tube headers and install them...no ill install them for you....and then i will take off the rest of your exhaust and we will drive the car...i bet it feels like a DOG down low.....because unless the car is making some serious horsepower it needs some kind of back pressure to make power...its not rocket science...its rather simple....
Anthony
My_Little_Pony
New Member
Alright, that answers my question then....thanks for clearing that up a little more. Isn't that straight exhaust gives you too much backpressure, cause that's the reason people are afraid of "burning valves"??? That's why i mentioned that if they want to run straight pipes, they are going to want to have a tune up right afterwards to compliment the exhaust.
WOW, I am smart, I just realized, I am in the 5.0 forum....
I don't know how that happened. I used the "search" tool and it landed me here on my search. Sorry guys.....oh well, exhaust is exhaust 
That's why i mentioned that if they want to run straight pipes, they are going to want to have a tune up right afterwards to compliment the exhaust.WOW, I am smart, I just realized, I am in the 5.0 forum....
I don't know how that happened. I used the "search" tool and it landed me here on my search. Sorry guys.....oh well, exhaust is exhaust 
stangboy
Founding Member
I used to have straight pipes from the headers to the mufflers(no h or x). I got a lot of compliments but it took away from my low end torque. So, i'd suggest if you want loud just get an off road h-pipe if you don't have to pass emissions...like King Cobra 22 said.
Black95GTS
Active Member
VIPERn94Five-0 said:
Nice man, thats better then I've ever been able to explain it... every time I take this stance everyone says I'm an idiot and then tells me that Nascars are fast as hell and they run open exhaust. These people don't understand that Nascars rev their 350s up to 9500 RPMS!!! They want the power up high because the whole race is at 140mph or higher. And you start the race already in motion anyway. Well if you don't mind I'm copying your explanation for the benefit of my frat brothers.
larrendeuce
Member
Burning valves usually happens from open headers, usually shorty, that the exhaust gasses exit so quickly that the vavle cools off too much before the next power stroke. I also thought that running straight pipes, vs a muffler hurt power due to pressure and sound waves in the exhaust not being absorbed or controlled.
squall9393
New Member
Will Cats in my Xpipe provide enough backpressure to keep from hurting anything? I always like running open flow without the plugs in my mufflers. It's f***ing intimidating as hell to Ricers and their fart cannons.
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