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(LiveLeak)   VW Touareg vs. Chevy Duramax truck in tug of war. Place your bets   (liveleak.com ) divider line
    More: Amusing, tug-of-war, VW Touareg, trucks  
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6687 clicks; posted to Video » on 09 Apr 2013 at 7:40 AM (3 years ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



71 Comments     (+0 »)
 
View Voting Results: Smartest and Funniest
 
2013-04-09 12:17:30 AM  
The Duramax weighs more than 2000lbs more than the Touareg. The proposition is silly.
 
2013-04-09 12:32:15 AM  
It's more about traction than pure power.  The Chevy looks like it's riding on mud/trail tires, great for getting traction in the sticky stuff, but not as good as street tires for grip on pavement.

/Couldn't see the badges on the Touareg, they made a V10 diesel version for a few years
 
2013-04-09 12:38:11 AM  

TuteTibiImperes: It's more about traction than pure power.  The Chevy looks like it's riding on mud/trail tires, great for getting traction in the sticky stuff, but not as good as street tires for grip on pavement.

/Couldn't see the badges on the Touareg, they made a V10 diesel version for a few years


plus it weighs 50% more.
 
2013-04-09 12:40:13 AM  

Asa Phelps: TuteTibiImperes: It's more about traction than pure power.  The Chevy looks like it's riding on mud/trail tires, great for getting traction in the sticky stuff, but not as good as street tires for grip on pavement.

/Couldn't see the badges on the Touareg, they made a V10 diesel version for a few years

plus it weighs 50% more.


Wouldn't weight be an advantage here?  The Touareg pulls the truck.
 
2013-04-09 07:31:45 AM  
The chevy is not in 4WD, either.  Also, pickups have much less weight over the rear wheels.
 
2013-04-09 07:37:48 AM  
By all means, stand right farking next to the tow strap.
 
2013-04-09 07:58:51 AM  
The uploader says that the truck was in 4WD but at 0:51 both the front tie rods snap on the Chevy....so not a fair fight....a funny one though according to the lady and small children standing within biatchslapping distance of the tow strap.
 
2013-04-09 07:58:52 AM  
Any chance we can use the videographer's skull as a wheel chock?
 
2013-04-09 08:23:08 AM  
lol. is the touareg a diesel? lots of torque, perhaps?
 
2013-04-09 08:34:58 AM  
Ha Ha. The guy in the pickup probably went home and cried like a baby.
 
2013-04-09 08:35:30 AM  

Mr. Coffee Nerves: Any chance we can use the videographer's skull as a wheel chock?


www.biography.com

Alas, not this time.
 
2013-04-09 08:40:07 AM  
Besides making the driver look like a huge D-bag, what is the advantage of having those huge stacks in your pickup?
 
2013-04-09 08:48:03 AM  
Yew know yer redneck whin you think that silly truck is going to out-pull the torqued-as-fark (diesel) Touareg.

But those diesel Tuaregs really are torquey as fark, so when it's pulling on the back of the truck like that, further reducing the traction of the front wheels, the battle comes down to a fine line between torque and traction.

And the redneck lost.
 
2013-04-09 08:59:39 AM  
I watched the video before coming to the thread. My first thought was, "Why is that shrill woman standing so close to a rope under so much tension?"
Glad I'm not the only one with that thought.
 
2013-04-09 08:59:55 AM  
Gosh, you mean that giant pickup trucks with macho names don't automatically confer uneartlhy macho power?

Wonder what that says about super-ultra-scary-looking "assault weapons".
 
2013-04-09 08:59:56 AM  
I've got a Touareg with the V6 TDI and it has torque for days.  I scare the hell out of the kids in their souped up Hondas and Jettas.  They don't expect an SUV to blow their doors off.  If I remember correctly this video is of a V10 TDI.
 
2013-04-09 09:03:05 AM  

ShowboatingAtomicHotDog: The uploader says that the truck was in 4WD but at 0:51 both the front tie rods snap on the Chevy....so not a fair fight....a funny one though according to the lady and small children standing within biatchslapping distance of the tow strap.


As someone not familiar with truck parts and repairs, are you saying it wasn't a fair fight before or after the tie rods snapped?
 
2013-04-09 09:06:00 AM  
The problem isn't torque. The wheel spin on the truck shows that. They're in more or less the same weight class - but most of the pickup's weight is in the front when it's unloaded.

Put a couple of thousand pounds in the truck bed and try again.
 
2013-04-09 09:56:39 AM  

HeadbangerSmurf: I've got a Touareg with the V6 TDI and it has torque for days.  I scare the hell out of the kids in their souped up Hondas and Jettas.  They don't expect an SUV to blow their doors off.  If I remember correctly this video is of a V10 TDI.


We have a 2004 Touareg and it is a huge piece of shiat.  The electronics were so FUBAR, not only would it not run, it would chuckle when I sat in the drivers seat.  Granted, the V6 petrol engine is way underpowered, but there were lots of other issues.

We are going to replace it with an Outback.
 
2013-04-09 09:58:23 AM  

ShowboatingAtomicHotDog: The uploader says that the truck was in 4WD but at 0:51 both the front tie rods snap on the Chevy....so not a fair fight....a funny one though according to the lady and small children standing within biatchslapping distance of the tow strap.


So the Touareg had so much torque it broke the pickup?

The RU faster than a redneck guys can't be happy about this development.
 
2013-04-09 09:58:37 AM  
Nice to see Zapruder is getting video work again.
 
2013-04-09 10:37:00 AM  

Broktun: HeadbangerSmurf: I've got a Touareg with the V6 TDI and it has torque for days.  I scare the hell out of the kids in their souped up Hondas and Jettas.  They don't expect an SUV to blow their doors off.  If I remember correctly this video is of a V10 TDI.

We have a 2004 Touareg and it is a huge piece of shiat.  The electronics were so FUBAR, not only would it not run, it would chuckle when I sat in the drivers seat.  Granted, the V6 petrol engine is way underpowered, but there were lots of other issues.

We are going to replace it with an Outback.


Don't. The latest Outback has many issues with it, one being lane wandering. I just got rid of mine.
 
2013-04-09 11:00:10 AM  
A 2wd can be towed by a smaller vehicle if the rear wheels break traction.
/who knew?
//liked the video where the Dodge took the Chevy for a lap around the parking lot better.
 
2013-04-09 11:51:25 AM  
The action is starting!  Quick, take a picture of the ground!  Ohh, a bicycle!

/idiot
 
2013-04-09 12:06:19 PM  
truck driver hit it too hard and broke the tires free. you can see this what with the rubber patch he's laying down.

sure, torque matters a lot, but you don't need much power at all to pull someone that's broken traction around.
 
2013-04-09 12:47:15 PM  
Would it be too far off to say that a good strategy here would be to just sit on the brakes, wait until you hear the other guy spinning is tires, and then go?
 
2013-04-09 12:51:09 PM  
I've seen this before... The VW is a V10 TDI. Look up the specs... 309hp and *cough* 553 lb-ft out of that "little" SUV. Sure, the Chevy has about 45 more torques, but hopping your wheels up off the ground because you're an idiot doesn't let the torque do its thing. You don't fark with a 5500lb hunkered down VW Toureg with a V10 TDI and street tires with traction. Especially if you're one prone to lighting your tires up in a truck pull.

Also, I fail to see the unfairness when the Chevy breaks it's tie rods.
 
2013-04-09 12:55:31 PM  

Fish in a Barrel: Would it be too far off to say that a good strategy here would be to just sit on the brakes, wait until you hear the other guy spinning is tires, and then go?


yes, very much. you wait for the other guy to pop his traction and then just goose it. you'll pull him all over till he gets smart. granted one that happens he's got some serious grip from the hot tires...


i call bullshiat on the tierods tho. they didn't break. redneck jackass lost to some 'pussy yuppie wagon'
 
2013-04-09 01:05:35 PM  

buttery_shame_cave: Fish in a Barrel: Would it be too far off to say that a good strategy here would be to just sit on the brakes, wait until you hear the other guy spinning is tires, and then go?

yes, very much. you wait for the other guy to pop his traction and then just goose it. you'll pull him all over till he gets smart. granted one that happens he's got some serious grip from the hot tires...


i call bullshiat on the tierods tho. they didn't break. redneck jackass lost to some 'pussy yuppie wagon'


Yep, same here. The only thing he broke was his traction. That Chebbie also sounded like a diesel and with those red-neck-stacks in the bed I would bet heavily against it being a gas engine. Pipes that size would on a largely stock gas engine = loss of torque.

Chebbie driver was an idiot. Toerag FTW I guess...
 
2013-04-09 01:40:09 PM  
Can I bet on "some Tennessee chick's Dodge" or do I have to pick from the pieces of shiat listed above?
 
2013-04-09 01:43:32 PM  
where the fark did they find a jackoff that'd by that kind of truck but still install a LEGAL height tow hitch?!?
 
2013-04-09 01:45:53 PM  
If the strap broke we'd have our 2013 Darwin Award Nominees for the 1st quarter of the year. Better luck next time.

When pulling with a truck, you gotta put 500 or 600 pounds between the wheel wells or its a waste of gas.
 
2013-04-09 02:36:12 PM  

prjindigo: where the fark did they find a jackoff that'd by that kind of truck but still install a LEGAL height tow hitch?!?


You need to have the hitch where the trailer will be level with it. Gotta get a low-ball with a lifted truck. My guess is anyone who'd buy that kind of truck would need a low hitch if they were smart..
 
2013-04-09 02:43:44 PM  
Actually when the fabric straps snap, it isn't a "take your head off" situation......

/tow CABLES though......big difference...
 
2013-04-09 04:14:47 PM  
Toerag.
 
2013-04-09 04:32:33 PM  

TuteTibiImperes: It's more about traction than pure power.  The Chevy looks like it's riding on mud/trail tires, great for getting traction in the sticky stuff, but not as good as street tires for grip on pavement.

/Couldn't see the badges on the Touareg, they made a V10 diesel version for a few years


I got a new set of Bridgestone tires years ago when I got my Silverado - didn't like the small, factory tires on it. Those tires sucked. When it would even sprinkle, the tires would be like they were being sprayed with oil. Small hill to car lot I worked at, got stuck on it (full blacktopped, city street, in excellent condition).  Just spun and spun like I was on ice, in July, simply because of a light rain/sprinkle.  Same with taking off at stop lights on dry pavement if I was not careful.. bark the tires like I was intentionally trying to make them squeal as loud as possible.
Between the danger factor and probably wind up getting a ticket for squalling the tires, I only gave them about a month or two then sold them - much happier with Timberline AT's on there now. Can even goose it at a stoplight and 'usually' will not peel out.
 
2013-04-09 05:09:42 PM  

Broktun: HeadbangerSmurf: I've got a Touareg with the V6 TDI and it has torque for days.  I scare the hell out of the kids in their souped up Hondas and Jettas.  They don't expect an SUV to blow their doors off.  If I remember correctly this video is of a V10 TDI.

We have a 2004 Touareg and it is a huge piece of shiat.  The electronics were so FUBAR, not only would it not run, it would chuckle when I sat in the drivers seat.  Granted, the V6 petrol engine is way underpowered, but there were lots of other issues.

We are going to replace it with an Outback.


The early Touaregs were shiat.  I had a 2008 that I just traded in on a 2012 and I can't complain about either.  The 2008 lost the power steering pump right after I bought it but it was covered under warranty and they gave me a car to drive so I was fine with it.  Otherwise I drove the hell out of it.  The 2012 TDI is amazing.  15k since November and I've been getting 28mpg on the highway at 70-80mph.  I drove from Traverse City, MI (home) to Sault Ste. Marie, MI and averaged 31mpg until I got to the highway.  On a side note, my daughter has a Forrester, my wife has an Outback Sport, and our sons share a Legacy Wagon and they've all been great cars.
 
2013-04-09 05:28:57 PM  

Tank_Fuzzbutt: Broktun: HeadbangerSmurf: I've got a Touareg with the V6 TDI and it has torque for days.  I scare the hell out of the kids in their souped up Hondas and Jettas.  They don't expect an SUV to blow their doors off.  If I remember correctly this video is of a V10 TDI.

We have a 2004 Touareg and it is a huge piece of shiat.  The electronics were so FUBAR, not only would it not run, it would chuckle when I sat in the drivers seat.  Granted, the V6 petrol engine is way underpowered, but there were lots of other issues.

We are going to replace it with an Outback.

Don't. The latest Outback has many issues with it, one being lane wandering. I just got rid of mine.


I must disagree. I just got my 2013 and haven't had any issues. And I chose it over the Tourareg.
 
2013-04-09 05:32:15 PM  
If you put another touareg in the bed of the Chevy, it would give it some weight and perhaps it would improve the traction.

but in the end, anybody who has to listen to the woman talk loses.
 
2013-04-09 05:38:12 PM  
I'm too damn old as that just looks idiotic to me, why damage your car and waste your tires to show you have a penis.
 
2013-04-09 06:02:44 PM  

hutchkc: I'm too damn old as that just looks idiotic to me, why damage your car and waste your tires to show you have a penis.


Did not hurt either vehicle, diesels are made for pulling/towing.  The truck burned a little rubber, not enough that you would ever notice.
 
2013-04-09 06:05:56 PM  
Again?  I wouldn't mind so much if they didn't use the same shiatty camera person that they used the first time, six+ months ago.
 
2013-04-09 06:42:00 PM  
So much for American ingenuity. Hell, at least the industry lost to the Germans. White on white crime is no sin.
 
2013-04-09 07:00:39 PM  
Another moron who can't hold a camera still for 60 damn seconds.
 
2013-04-09 07:57:16 PM  

Enormous-Schwanstucker: buttery_shame_cave: Fish in a Barrel: Would it be too far off to say that a good strategy here would be to just sit on the brakes, wait until you hear the other guy spinning is tires, and then go?

yes, very much. you wait for the other guy to pop his traction and then just goose it. you'll pull him all over till he gets smart. granted one that happens he's got some serious grip from the hot tires...


i call bullshiat on the tierods tho. they didn't break. redneck jackass lost to some 'pussy yuppie wagon'

Yep, same here. The only thing he broke was his traction. That Chebbie also sounded like a diesel and with those red-neck-stacks in the bed I would bet heavily against it being a gas engine. Pipes that size would on a largely stock gas engine = loss of torque.

Chebbie driver was an idiot. Toerag FTW I guess...


i wouldn't be surprised if he'd installed the ass stacks on a non-diesel chevy tho.

/2001/2002 3500 silverados with duramax and dual rear axles were freaking swank, for chevy. i miss those. MONSTER towing capacity.
 
2013-04-09 08:12:58 PM  

buttery_shame_cave: Enormous-Schwanstucker: buttery_shame_cave: Fish in a Barrel: Would it be too far off to say that a good strategy here would be to just sit on the brakes, wait until you hear the other guy spinning is tires, and then go?

yes, very much. you wait for the other guy to pop his traction and then just goose it. you'll pull him all over till he gets smart. granted one that happens he's got some serious grip from the hot tires...


i call bullshiat on the tierods tho. they didn't break. redneck jackass lost to some 'pussy yuppie wagon'

Yep, same here. The only thing he broke was his traction. That Chebbie also sounded like a diesel and with those red-neck-stacks in the bed I would bet heavily against it being a gas engine. Pipes that size would on a largely stock gas engine = loss of torque.

Chebbie driver was an idiot. Toerag FTW I guess...

i wouldn't be surprised if he'd installed the ass stacks on a non-diesel chevy tho.

/2001/2002 3500 silverados with duramax and dual rear axles were freaking swank, for chevy. i miss those. MONSTER towing capacity.


Could be. You never know with the `necks but I swore I heard the distinct sound of the Dmax in the crappy video.

You should see the towing capacities of the latest crop of pickups. 30K lbs now for a Dodge...ugh. nearly 25K for the Ford and 21K+ for the Chevy. I was happy when I was towing 15,000 lbs with my old 99 F350 :)
 
2013-04-09 08:35:45 PM  

EatHam: By all means, stand right farking next to the tow strap.


That was pretty much my first thought...

"Local family sliced in half like a picnic ham - details at 11!"
 
2013-04-09 09:35:52 PM  
All the power in the world is useless without traction, any real motor-head will tell you that.....

The  Touareg has the synchro 4wd no? Which locks all three diffs for true four wheel drive? The chevy didn't look like it even had a locking rear diff. Simple matter of GRIP, don't matter the vehicle....

    The best 4 wheel drive vehicle I have ever drive was a VW synchro van, amazing differential locking system. As well, fully independent suspension with tons of negative travel. Sick. We used to use one to shuttle mountain bikes up logging roads. We'd get the point and laugh from the good ol boys in the big trucks, pass them and tripple their speed up the logging road...when they finally caught up, the barrage of questions about the suspension, motor, shocks, etc. would ensue.....
 
2013-04-09 10:02:31 PM  

Fish in a Barrel: Would it be too far off to say that a good strategy here would be to just sit on the brakes, wait until you hear the other guy spinning is tires, and then go?


Yep.  Static friction > dynamic friction.  Lose traction and get the wheels spinning and you're done for.  Also true in mud, snow, ice, even wet grass.
 
2013-04-09 10:18:16 PM  
Reminds me of an old YouTube video of a Toyota pulling a stuck Hummer out of sand. Link
 
2013-04-09 10:26:07 PM  

Fish in a Barrel: Would it be too far off to say that a good strategy here would be to just sit on the brakes, wait until you hear the other guy spinning is tires, and then go?


Yes. The driver of truck had it in HI and hit the gas breaking the tires free at which point he lost all traction and the VW one. He should have put it in 4LO and in the lowest gear and then started off with as little gas as possible. I don't know about a chevy but in a Jeep in 4LO you don't even have to feather the clutch or tap the gas because there is so much reduction, even the starter has enough torques to move a jeep in 4LO and First.

The Chevy also looked like it was full of cheap mods, which is possibly why the tie rods snapped.
 
2013-04-09 10:30:49 PM  

Zombalupagus: Reminds me of an old YouTube video of a Toyota pulling a stuck Hummer out of sand. Link


H2s suck and are a poor facsimile of the H1.  Chevy/GMCs tend to have sucked in my experience.  Had several (wagon, truck x2, sports wagon, suburban x2, lumina, plus some sedan in the 80s- forgot what kind).  I know, my vehicles are the alpha baller type.  Be jealous.
 
2013-04-09 10:32:18 PM  
Did have a corvette-it was an amazing car.  Only chevy/gmc I have had that did not disappoint.
 
2013-04-09 10:57:09 PM  
Exactly what I expected. Gotta weigh down a truck to get traction when not in 4wd.
 
2013-04-09 11:01:41 PM  

Ebenator: Besides making the driver look like a huge D-bag, what is the advantage of having those huge stacks in your pickup?


none...

The breweries maintence guy's daughters fiance (bueler) has this jacked up monstrosity of a chevy

damn thing is clean, never seen a drop of mug in its life and his this one ENOURMOUS pipe coming out the middle of the bed right behind the crew cab,

they brought the truck to the brewery to pick up a keg.. because... its a truck I guess...

I looked out the window at the damn thing and just had to slowly wander out the door to.. Gawk at the thing. The girl is just laughing as I stand there looking at the thing all confused like..

" what in the name of the great Satan made any of y'all think THAT was a good idea"?

it was impossible to life a keg up into the bed, I had to break out the fork lift

sheeee-iit... and I'm the one that actually LOOKS like a hillbilly
 
2013-04-09 11:15:17 PM  

Cerebral Knievel: this one ENOURMOUS pipe coming out the middle of the bed right behind the crew cab


Judging from the trucks like that I've seen around, I'll bet it's loud a fark, too.  That would drive me nuts.

What I've always wondered is, what do you do when it rains?  Just let the stack fill up?
 
2013-04-09 11:37:22 PM  

Zombalupagus: Reminds me of an old YouTube video of a Toyota pulling a stuck Hummer out of sand. Link


Those kind of videos are fun.

Like this one or  this one.

/Love my Sidekick.
//Not my video.
///Mine's a 2 door convertible like that Tracker.
 
2013-04-10 04:25:44 AM  

BEER_ME_in_CT: prjindigo: where the fark did they find a jackoff that'd by that kind of truck but still install a LEGAL height tow hitch?!?

You need to have the hitch where the trailer will be level with it. Gotta get a low-ball with a lifted truck. My guess is anyone who'd buy that kind of truck would need a low hitch if they were smart..


Way to avoid the question!

If the truck had been stock with HALF the traction control the 2egg came out the factory with, it would have played rag-doll with the 2egg.
 
2013-04-10 05:33:18 AM  
As soon as I saw Touareg I knew the outcome.  Do people not remember their original ad campaign?

en.kllproject.lv
 
2013-04-10 07:37:48 AM  

cirby: The problem isn't torque. The wheel spin on the truck shows that. They're in more or less the same weight class - but most of the pickup's weight is in the front when it's unloaded.

Put a couple of thousand pounds in the truck bed and try again.


Only if you also put the same weight in the VW. fair is fair. The chevy broke, the VW didn't.
 
2013-04-10 08:56:09 AM  

Enormous-Schwanstucker: Pipes that size would on a largely stock gas engine = loss of torque.


So, back pressure creates torque?  Does that work on the same principles as R-Type stickers positively affecting horsepower?
 
2013-04-10 09:29:58 AM  

fatbear: cirby: The problem isn't torque. The wheel spin on the truck shows that. They're in more or less the same weight class - but most of the pickup's weight is in the front when it's unloaded.

Put a couple of thousand pounds in the truck bed and try again.

Only if you also put the same weight in the VW. fair is fair. The chevy broke, the VW didn't.


Yeah. You can't stack the odds in favor of one and then say "try again" under the guise of it being a fair fight. The truck needing the extra weight in order to match it's opponent is an inferiority with the truck in this application and shouldn't be whitewashed. It is what it is.
 
2013-04-10 09:45:16 AM  

Bruce Campbell: Enormous-Schwanstucker: Pipes that size would on a largely stock gas engine = loss of torque.

So, back pressure creates torque?  Does that work on the same principles as R-Type stickers positively affecting horsepower?


Well, I was being deliberately simplistic but too many other factors. If the engine is not tuned to work with those giant fart cans or that sewer pipe sized exhaust you'll see a drop in performance.

And yes, the R-Type stickers increase performance :)
 
2013-04-10 10:44:52 AM  

prjindigo: BEER_ME_in_CT: prjindigo: where the fark did they find a jackoff that'd by that kind of truck but still install a LEGAL height tow hitch?!?

You need to have the hitch where the trailer will be level with it. Gotta get a low-ball with a lifted truck. My guess is anyone who'd buy that kind of truck would need a low hitch if they were smart..

Way to avoid the question!

If the truck had been stock with HALF the traction control the 2egg came out the factory with, it would have played rag-doll with the 2egg.


Except that "stock" means it *doesn't* have half the traction control.

VW wins, regardless of the excuses.
 
2013-04-10 12:03:32 PM  
Depending on the package the GM had 4 low locks all the diffs and you get true 4wd. In 4 high it should lock the rear, but won't lock the front or center so you won't drive all 4. I imagine he just stuck it in 4 hi expecting to pull the little SUV around like a toy.

Watching idiot truck pulls like this is fun, but I'm not gonna do it with anything I own. It doesn't prove anything and you're likely to break something. Not to mention what happens if you start getting pulled backward and the other guy decides to drag you around for a bit.
 
2013-04-10 03:00:22 PM  
WhereTF does someone see tie rods breaking?  There are no broken tie rods as far as I can tell.  The front end geometry tells me the driver of the truck turned.  I only sell car parts for a living and worked as a professional mechanic for 18 months though, so I might have missed something...
 
2013-04-10 04:55:43 PM  

wotnartd: WhereTF does someone see tie rods breaking?  There are no broken tie rods as far as I can tell.  The front end geometry tells me the driver of the truck turned.  I only sell car parts for a living and worked as a professional mechanic for 18 months though, so I might have missed something...


'tie rods broke' is a cover for 'my penis was smaller'
 
2013-04-10 05:00:16 PM  

Bruce Campbell: Enormous-Schwanstucker: Pipes that size would on a largely stock gas engine = loss of torque.

So, back pressure creates torque?  Does that work on the same principles as R-Type stickers positively affecting horsepower?


excessively low exit pressure(caused by unrestricted pipes like that) can in fact make a big gaping hole in your torque curve.

the engine relies on a certain degree of tuned back-pressure to keep the incoming charge of fuel/air from exiting the cylinder due to its own inertia.

in regular cars it's not so big a thing but in long-stroke engines it's a problem. in two-strokes it's an entire field of study you could build an engineering doctoral thesis on.

general rule of thumb is, if you're rocking more than about 400-500 horses, go with a 3-4" pipe. less than that you're choking it. more than that, you're wasting fuel/air that could be better used powering the engine, and is instead getting detonated in the exhaust stacks(which is part of why those huge fart pipes are so obnoxiously loud)
 
2013-04-10 05:10:50 PM  

buttery_shame_cave: the engine relies on a certain degree of tuned back-pressure to keep the incoming charge of fuel/air from exiting the cylinder due to its own inertia.


This is the first sensible description of why low back-pressure is bad that I've heard.  Normally it just gets butchered into, "the engine uses back-pressure to close the valves," which makes no farking sense.
 
2013-04-10 05:43:15 PM  

Fish in a Barrel: buttery_shame_cave: the engine relies on a certain degree of tuned back-pressure to keep the incoming charge of fuel/air from exiting the cylinder due to its own inertia.

This is the first sensible description of why low back-pressure is bad that I've heard.  Normally it just gets butchered into, "the engine uses back-pressure to close the valves," which makes no farking sense.


fluid dynamics is such a fascinatingsubject. the number of ways you can induce back-pressure and how to calculate them is bloody fun. hard, but fun. put it this way, there's a reason the pipes on funnycars are shaped the way they are, and are the length they are.

you can, in theory, run very large pipes, provided your initial header pipes are tuned for your engine's peak power range, etc. but most people don't do this, they just cram on whatever they can fit in under the theory of 'bigger is better unghunghungh'

because while of course tuned backpressure is good, being able to induce artificially low pressures immediately after is also good, because keeping the backpressure wave in the pipe is bad... so on and so on...


back-pressure closing valves is an actual thing, but only on valve-based pulsejets, that i know of.
 
2013-04-11 03:23:50 PM  

buttery_shame_cave: excessively low exit pressure(caused by unrestricted pipes like that) can in fact make a big gaping hole in your torque curve.


Most of these fat piped systems are cat-back.  I always thought that stock catalytic converters already do enough restriction that, unless you've replaced it, it doesn't really matter what is after it.
 
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