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IOwnCalculus posted:A long-held school of thought is that bashing the gently caress out of a header like that, so that what used to be smoothly radiused bends and a circular cross-section throughout is now a mess of jagged dents, would reduce exhaust flow enough to kill a significant bit of horsepower. Granted, these are 1.75" primary-tube headers so even dented there's still a lot of area, but this is also a 560hp 6.6L engine. Like they mention at the end of the video, you most likely would see a significant drop by switching to 1.625" primary-tube headers. (Since I'm bored at work.) Bashing the pipe isn't going to change the area much, at least initially. The face you bash will be offset a bit by the pipe getting wider in the perpendicular direction. I compared the cross-sectional area of a 1.75" dia circle (2.405 in^2) to the area of an ellipse that was squashed 1/4" from that initial circle (ie, I kept the perimeter the same as the amount of material shouldn't have changed (major axis = 1.955", minor axis = 1.5")) (2.303 in^2). Squishing it a 1/2" reduces the cross-sectional area by only 4.2%. It's like going from a 1.75" dia circle to a 1.71" dia circle. Going from 1.75" dia to 1.625" dia circles, the area drop is 13.8%, or 3.5x more loss in area than bashing. The different cross-sections shouldn't have an effect on drag (if I remember college right, that's just based on the surface area of the pipe, which shouldn't have changed, just deformed). You'd get a bit more pressure do to the drop in area, but that's only one factor in how much force you need to push the air through. I know the sharpness of a bend has a large effect on the energy loss of fluid through a pipe, so you want to make those as smooth and large as possible. tl;dr: Unless you are bashing the tubes enough to be creasing and pinching them, you're not decreasing the cross-sectional area as much as you'd think. Uthor fucked around with this message at 23:32 on Jan 13, 2016 |
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Jan 13, 2016 23:26
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David freiburger caught on tape beating hookers with a hammer while laughing maniacally. Somebody call nancy grace.
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Jan 13, 2016 23:45
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SCIENCE. https://www.youtube.com/watch?v=fqZYgReuywM
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Jan 18, 2016 16:03
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So god drat canadian. Also wish I coulda seen this when I was breaking taps.
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Jan 18, 2016 23:55
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puberty worked me over fucked around with this message at 03:41 on Jan 4, 2020 |
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Jan 19, 2016 04:30
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How the hell do you make an embedded webm not break tables? https://thumbs.gfycat.com/PhysicalConfusedArchaeocete-mobile.mp4 Watch the guy on the right.
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Jan 19, 2016 04:57
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Seat Safety Switch posted:How the hell do you make an embedded webm not break tables? Burnaby?
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Jan 19, 2016 07:43
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puberty worked me over fucked around with this message at 03:41 on Jan 4, 2020 |
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Jan 19, 2016 18:02
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Someone stuffed a four-carb Corvair mill into a BMW Isetta. https://www.youtube.com/watch?v=Eqo0Td5FHsY  Aaaannnd it's for sale! http://www.ebay.com/itm/281912167902?rmvSB=true PainterofCrap fucked around with this message at 04:03 on Jan 20, 2016 |
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Jan 20, 2016 03:58
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They should call it the Wheelie Bin.
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Jan 20, 2016 04:27
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Extra posted:One can only hope crapcan non-oval dirt racing will come to the states https://www.youtube.com/watch?v=Ji5XJlKZvYY What is the yellow/green/red 301 car? That dude is straight being a shitheel through the entire video, braking way too early for way too long, jerking to block, and backing up an entire pack behind him. I'm surprised nobody took him out from sheer spite.
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Jan 20, 2016 12:24
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https://www.youtube.com/watch?v=8DwKqCZlKnw&t=196s Watch the rest of the video if you want a bunch of info about digital voice synthesis.
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Jan 20, 2016 19:17
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new vid from Tax The Rich with an F40 https://www.youtube.com/watch?v=tF1VPIV9CsY
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Jan 21, 2016 17:02
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neckbeard posted:new vid from Tax The Rich with an F40 Deserved less soundtrack.
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Jan 21, 2016 17:09
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IOwnCalculus posted:https://www.youtube.com/watch?v=8DwKqCZlKnw&t=196s This is awesome and I'm glad someone is saving this for posterity. My grandparents were diehard GM fans, but when the lease was up on my Grandma's '81 Seville was up, she bought an '84 New Yorker Turbo. 7 year old Goober Peas thought that car was the most amazing thing ever - between the electronic gauges, dashboard talkyman, the turbo, the buttony leather seats with inboard controls, moonroof, and boxed in rear windows it was like riding in an amazing gadget filled limousine. Unfortunately she kept it for 18 months, at least one of which was spent at the dealership. One thing I remember is being on the highway, and talkyman would randomly tell you to fasten your seatbelts (which were already fastened), then a few minutes later you'd get a random 'Thank You'
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Jan 21, 2016 17:53
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https://www.youtube.com/watch?v=QI2YRnT0LyE
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Jan 21, 2016 21:47
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The first half of that video makes a great "180 degree headers versus standard exhaust" as well.
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Jan 21, 2016 21:52
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mythadile posted:Shelby Cobra Video
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Jan 21, 2016 23:22
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neckbeard posted:new vid from Tax The Rich with an F40 gently caress ANY oval office who puts music over the sound of a F40. That's sooooo much better
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Jan 21, 2016 23:42
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Thank you for this. The Daytona is my unicorn. The perfect beast.
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Jan 22, 2016 02:37
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The sound of pure distilled 'awesome'.
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Jan 22, 2016 04:18
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Hot Rod Garage does a mini tub on a 66 Chevelle. The more time Tony gets on camera the better he is, and having Lucky to bounce off of works even better. Laughed my rear end off at "eight inches".
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Jan 22, 2016 08:02
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IOwnCalculus posted:Hot Rod Garage does a mini tub on a 66 Chevelle. I did enjoy this episode, but some of his earlier ones put me off. His delivery is very monotone and didn't seem as nearly as engaging as Friberger. This episode does show he has improved since I last watched it.
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Jan 22, 2016 16:40
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Ya Lucky+Tony works pretty well.
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Jan 22, 2016 17:31
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The video itself doesn't show much, but what it implies is pretty crazy stuff. https://www.youtube.com/watch?v=lIEd20OZ0RA That thing is an absolute monster. E: Another video, haven't watched this one all the way through, but I'm lapping up everything about the Regera. https://www.youtube.com/watch?v=AMmdl77VOxg "You can spin the tires from 0 to 280kph in the dry, and over 280kph you can't spin the tires anymore, then you can just accelerate very very fast" "If you turn off the stability and traction control, at any speed from 0 to 280, as soon as you floor it fully, you can rip your tires loose. Instantly." 
KozmoNaut fucked around with this message at 18:10 on Jan 22, 2016 |
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Jan 22, 2016 17:39
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Boaz MacPhereson posted:Thank you for this. The Daytona is my unicorn. The perfect beast. I'm friends with Dave MacDonald's son on Facebook, and the Shelby stuff he gets to hang around is amazing. Not worth losing your dad over, but a nice legacy to celebrate. He would've been in the Daytona and then most likely the GT40 had he not died at Indy in '64. e- Since it's the Youtube thread,  the accident in questionHe's the initial car that spins. It was a Mickey Thompson built car with a host of problems. The book "Black Noon" is excellent regarding the events leading up to and immediately after the '64 Indy 500 e2- also of note is look how many cars in that footage have enclosed wheels Seizure Meat fucked around with this message at 17:52 on Jan 22, 2016 |
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Jan 22, 2016 17:47
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Tony has improved a ton since the first episodes, thankfully. Those were kinda painful to watch. Lucky needs to be the co-host for the show though, they're a good combo.
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Jan 22, 2016 18:19
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KozmoNaut posted:"You can spin the tires from 0 to 280kph in the dry, and over 280kph you can't spin the tires anymore, then you can just accelerate very very fast" What this means is we're probably going to see some spectacular wrecks.
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Jan 22, 2016 18:21
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VikingSkull posted:I'm friends with Dave MacDonald's son on Facebook, and the Shelby stuff he gets to hang around is amazing. Not worth losing your dad over, but a nice legacy to celebrate. Pretty cool. Dave actually won in a Daytona at Sebring. He probably would have gotten a seat in a GT40, though yeah.
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Jan 22, 2016 18:39
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Boaz MacPhereson posted:Pretty cool. Dave actually won in a Daytona at Sebring. He probably would have gotten a seat in a GT40, though yeah. Yeah, that's right, I forgot he actually got seat time in it. Only at Sebring, though, the rest of early 1964 he was in the King Cobra 
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Jan 22, 2016 19:18
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 NEW ROADKILL https://www.youtube.com/watch?v=duaRdayN7EE Involves more hellcat goodness.
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Jan 22, 2016 22:23
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old Roadkill 
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Jan 22, 2016 22:52
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VikingSkull posted:Yeah, that's right, I forgot he actually got seat time in it. Only at Sebring, though, the rest of early 1964 he was in the King Cobra Dave got the first wins in the Kings and the Daytona, too. I wish he would have gotten a chance with the Daytona Super Coupe. 
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Jan 22, 2016 23:16
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There's a huge chance he would've been the 3rd driver in a GT40 with AJ Foyt and Dan Gurney, too. Funny thing is, in that lineup, Dave was probably the best pure driver of the three. Sadly, that's probably a small part of why he died, you can't manhandle an Indycar (especially in 1964) at the Speedway and expect to walk away.
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Jan 23, 2016 00:28
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A compilation of Finns showing us how not to Rally drive https://www.youtube.com/watch?v=P0CXl8xBgEw Thankfully everyone was OK apparently. JingleBells fucked around with this message at 02:20 on Jan 23, 2016 |
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Jan 23, 2016 02:18
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That's hilarious! I like how a team of Finns clad in coveralls manhandle the cars back on track like it's no biggie.
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Jan 23, 2016 13:24
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^^^ It's the winter sequel to this great classic: https://www.youtube.com/watch?v=qiIYEmpWaaQ VikingSkull posted:old Roadkill It should be illegal to have so much fun as those guys are having there
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Jan 23, 2016 17:49
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mobby_6kl posted:^^^ That video is titled wrong. It should be "The BEST rally corner ever!"
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Jan 23, 2016 18:16
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The Locator posted:That video is titled wrong. It should be "The BEST rally corner ever!" No, it should be titled "Ay Ay Ay Ay Ay Ay Ay Ay"
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Jan 23, 2016 18:25
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Does Roadkill think that Bowling Green is in Tennessee?
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Jan 23, 2016 21:09
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