Learn how a dual-clutch transmission works

Posted by Ed Higginbotham Jan. 20, 2017, 9:36 a.m.
https://www.youtube.com/embed/lFAtc-zOKZs
You’ve heard that dual-clutch transmissions are great. But what makes them so good? How do they work? Learn Engineering videos to the rescue!
Show comments

You'll need to log in to post.

Ever Wanted to Know How a Torsen Differential Works?

Posted by Ed Higginbotham Dec. 26, 2016, 10:53 a.m.
https://www.youtube.com/embed/JEiSTzK-A2A
The wizardry that makes your driving wheels rotate together may not be as complicated as you think. Here’s a good explanation.
Show comments
NickD
NickD Dork
Dec. 26, 2016 10:55 a.m.

Watched this same exact video when I bought the Torsen swap for my C/SP '90 Miata. Pretty cool tech, although they take a little getting used

Vracer111
Vracer111 Reader
Dec. 26, 2016 11:56 a.m.

I've been looking at videos for stuff on a truck I'm looking to get soon and came across this differential video I think is pretty good:

Differential locker comparison

Love the torsen in my FR-S, probably will go with a Torsen in the truck as well. The mechanical selectable OX Locker is something I would like for offroad capability, but its either an open or a locked spool...and I'm not looking to do crazy offroad stuff in a 2WD truck, just some prerunner capable handling when in Arizona/Utah unpaved roads/deserts.

CLH
CLH Reader
Dec. 26, 2016 11:57 a.m.

Good explanation. It took me three watchings to wrap my head around how it works with a wheel-speed differential (as when cornering), but I finally got it. I kept wondering how it doesn't just lock in that situation, but I eventually got the point about equal but opposite speed change (+20% and -20% in the example). Ingenious. I do wish it would have talked about what happens when one wheel lifts. I'm still not clear on why a Torsen would go "open" in that situation.

Ransom
Ransom PowerDork
Dec. 26, 2016 7:50 p.m.

In reply to CLH:

That's a good question. I wonder if for some low level of load, the spur gear can drive the worm gear. I imagine it comes down to the angles involved.

But even if I grasp it a bit better now, I wouldn't say I have a solid, intuitive sense of the action. I wouldn't be at all surprised to find out that guess is in left field.

Ransom
Ransom PowerDork
Dec. 26, 2016 7:51 p.m.
NickD wrote: Pretty cool tech, although they take a little getting used

How so? I'm sure the Internet can tell me some stuff about how they drive differently to a clutch type LSD, but as long as you're mentioning it...

Knurled
Knurled MegaDork
Dec. 26, 2016 8:28 p.m.

"You can't backdrive a worm gear."

There ya be.

Torsens are nothing more than using worm gears for the side gears in an open diff. An axle can easily overdrive the diff if there is differential speed, so it still has all the benefits of an open bevel diff.

You'll need to log in to post.

Love Turbo Noises?

Posted by Ed Higginbotham Dec. 20, 2016, 10:21 a.m.
https://www.youtube.com/embed/7BNo8LmdQX0
The 2017 Tire Rack Ultimate Track Car Challenge is coming up in May. What better way to get pumped than listening to mighty loud turbo noises from Element Tuning’s Scion FRS from the 2015 UTCC?
Show comments

You'll need to log in to post.

Air-Cooled 911 Music Being Played Around Watkins Glen

Posted by Ed Higginbotham Dec. 20, 2016, 10:04 a.m.
https://www.youtube.com/embed/p9qY-SipYtA
There’s nothing quite like the sound of a vintage Porsche 911 being muscled around a track. It’s beautiful. And for your auditory pleasure today, we present our friend Brady Refenning from 901 Shop making his music around Watkins Glen. Sit back, relax and turn up the volume.
Show comments

You'll need to log in to post.

"Santa's Hot Lap" with Scott "Santa" Pruett

Posted by Ed Higginbotham Dec. 15, 2016, 12:49 p.m.
https://www.youtube.com/embed/W6h3ocrGM3I
Lexus knows how to throw a charity drive. Scott “Santa” Pruett took some fans on a ride in the Lexus RC F GT concept race car. Every item they read off a comically long list during their lap earned money for Toys for Tots.
Show comments

You'll need to log in to post.

Daytona Coupe Hillclimb

Posted by Ed Higginbotham Dec. 13, 2016, 8:17 a.m.
https://www.youtube.com/embed/kPZTOCdoX20
Shelby’s Daytona Coupe design is 52 years old this year but it still competes effectively in both vintage and modern events. Here’s one of Richard Bendell’s—founder of Motec—Aussie-built Daytona Coupes competing in the Targa High Country event.
Show comments
edizzle89
Dec. 13, 2016 9:43 a.m.

a daytona coupe would is in my top 5 just-won-the-lottery cars, but i would do a kit car with fat tires and a huge cam'd LS. such an amazing car

captdownshift
captdownshift PowerDork
Dec. 13, 2016 9:51 a.m.

I'm in love, and the noises...it's glorious

You'll need to log in to post.

Wet Line? What Wet Line?

Posted by Ed Higginbotham Dec. 9, 2016, 11:04 a.m.
https://www.youtube.com/embed/ekob61rWguw
This guy doesn’t need one. Driving a shifter kart slowly in the rain can be challenging for most of us. Then there’s this guy.
Show comments
srduck
srduck New Reader
Dec. 9, 2016 3:06 p.m.

Looks like Nationals this year. I think JA/JB ran in the rain on West Course when it started, and KM ran in the rain on East Course as it was drying. Both looked more like boating than karting.

You'll need to log in to post.

From the $2016 Challenge to State Autocross Champions

Posted by Ed Higginbotham Dec. 6, 2016, 12:58 p.m.
https://www.youtube.com/embed/LOiPGtwR4V4
The Valella brothers took their Toyota Tercel from a third place finish in the autocross portion of our $2016 Challenge straight to a class win in FSP at the Florida State Autocross Championship!
Show comments
GameboyRMH
GameboyRMH MegaDork
Dec. 6, 2016 1:12 p.m.

Do those vents count as passive variable aero devices?

Stampie
Stampie Dork
Dec. 6, 2016 1:29 p.m.

I love that Tercel.

David S. Wallens
David S. Wallens Editorial Director
Dec. 6, 2016 2:01 p.m.

Congrats. That's awesome news.

MrJoshua
MrJoshua UltimaDork
Dec. 6, 2016 2:11 p.m.

So what I'm reading is don't build to high level FSP specs if you want to win the challenge autocross.

Jokes aside-good job guys!

Ovid_and_Flem
Dec. 6, 2016 2:36 p.m.
GameboyRMH wrote: Do those vents count as passive variable aero devices?

Interior air diffusers

snailmont5oh
Dec. 6, 2016 4:04 p.m.

it looks like he did that thing that I always like to do, which is quit right before the end.

Vigo
Vigo PowerDork
Dec. 6, 2016 6:00 p.m.

What a benign handler!

patgizz
patgizz UltimaDork
Dec. 6, 2016 7:20 p.m.

Congrats guys!

Robbie
Robbie UltraDork
Dec. 6, 2016 7:30 p.m.

Yeah, totally awesome. Congrats.

I think winning would've been a whole lot harder on that bicycle.

You'll need to log in to post.

BMW Films Are Back

Posted by David S. Wallens Oct. 26, 2016, 3:43 p.m.
https://www.youtube.com/embed/PKYUtUw-8ig
15 years ago, BMW commissioned a series of short films to showcase their cars. And they recently added a sequel. The original films were remarkably good, starring Clive Owens. This was one of our favorites and we thought you all might enjoy it, too.
Show comments
David S. Wallens
David S. Wallens Editorial Director
Oct. 26, 2016 3:44 p.m.

PS: There is no way that these first came out 15 years ago. It was just a couple of years ago, right?

stan_d
stan_d Dork
Oct. 26, 2016 4:19 p.m.

I bought them on dvd.

David S. Wallens
David S. Wallens Editorial Director
Oct. 26, 2016 4:22 p.m.
stan_d wrote: I bought them on dvd.

I have them on DVD, too. I believe that we got it through BMW CCA.

Lof8
Lof8 HalfDork
Oct. 26, 2016 6:23 p.m.
David S. Wallens wrote: PS: There is no way that these first came out 15 years ago. It was just a couple of years ago, right?

I was thinking exactly this!

trigun7469
Oct. 27, 2016 8:15 a.m.

I would 3rd the DVD I received it in the mail many moons ago.

Ian F
Ian F MegaDork
Oct. 27, 2016 8:39 a.m.

I watched the new one a couple of days ago. It's pretty good. BMW definitely put up a decent production budget to make it.

pav5069
pav5069 Reader
Oct. 27, 2016 11:18 a.m.

So if I would buy a BMW it has enough horsepower to tear down a helicopter.....cool haha

chandlerGTi
chandlerGTi UberDork
Oct. 27, 2016 12:12 p.m.
David S. Wallens wrote:
stan_d wrote: I bought them on dvd.

I have them on DVD, too. I believe that we got it through BMW CCA.

They would give it to you if you could prove you owned a BMW. It was pretty awesome back then.

David S. Wallens
David S. Wallens Editorial Director
Oct. 28, 2016 9:17 a.m.
Ian F wrote: I watched the new one a couple of days ago. It's pretty good. BMW definitely put up a decent production budget to make it.

I can only imagine what the budget was for these films. I'm guessing that it's somewhere near "a lot."

You'll need to log in to post.

Ever wish that you could race your bike through a shopping mall?

Posted by David S. Wallens Oct. 24, 2016, 10:57 a.m.
https://www.youtube.com/embed/d38A-jh6rKk
On October 22 our editor participated in the Tough Biker’s Race for Time, a bike race through Orlando Fashion Square Mall. Here is some video courtesy of Kyle’s Bike Shop.
Show comments
David S. Wallens
David S. Wallens Editorial Director
Oct. 24, 2016 11:03 a.m.

And I realize that this has little car content, but haven't we all wished that we could recreate the chase scene from the Blues Brothers?

https://www.youtube.com/embed/IIdGxR-aU6o

java230
java230 Dork
Oct. 24, 2016 11:09 a.m.

Man that looks like fun! But I was secerately hoping you were on the vintage BMX bike...

David S. Wallens
David S. Wallens Editorial Director
Oct. 24, 2016 11:55 a.m.
java230 wrote: Man that looks like fun! But I was secerately hoping you were on the vintage BMX bike...

I know, I came unprepared. Looking back, my 22-inch BMX would have been perfect.

I thought that I was just going to watch and help my friend Chelsea. During dinner we ran into the owner of Kyle's Bike Shop. You're riding, right? he asked. When I started to say that I was just going to watch, he said that after dinner we were visiting his shop so I could grab a loaner. I had never ridden a mountain bike with suspension before. It was cushy.

For kicks Chelsea ran her skatepark/trails BMX bike--not even her race BMX or cyclocross bike.

She set the fastest time overall during the initial runs. The class winners then got an extra run. She wound up second overall, finishing second a pro cyclocross rider.

Fun evening. There's another one planned for December. We'll see what the course designers have planned for that one.

ultraclyde
ultraclyde UberDork
Oct. 24, 2016 1:35 p.m.

I stand corrected, there is at least one cool thing that happens in Orlando. I'd pay something approaching real money to that, it looks like a riot. Needs more staircases though.

Huckleberry
Huckleberry MegaDork
Oct. 24, 2016 1:49 p.m.

I've wished for the power of flight and/or to be able to kill people with mind powers but I can honestly say I've never really wished to race a bicycle through a shopping mall. It seems like a petty way to waste a wish.

You'll need to log in to post.

1 2 3 4 5 Next

OUR SPONSORS

Grassroots Motorsports Magazine

Subscribe Today

Also get your instant access to the digital edition of Grassroots Motorsports Magazine!

Learn More
yMtouv6X3DCjQFxYMec6T7QKrdmbJqPX