What's new

Overdriving the Front Axle?

How having a center diff would help the situation in a rockcrawling application ? You don't want any differential action.

Check out this video of Clibon that Woody and Adamwende mentioned. He can manually vary the torque to the rear axle from 0% to 100%. Not what Bdkw1 was going on about, but pretty freaking awesome. Not sure it is $15K awesome, but I am sure it will start showing up a lot more on new cars.

 
Check out this video of Clibon that Woody and Adamwende mentioned. He can manually vary the torque to the rear axle from 0% to 100%. Not what Bdkw1 was going on about, but pretty freaking awesome. Not sure it is $15K awesome, but I am sure it will start showing up a lot more on new cars.


Did I see this correctly;
The shocks acted as hydraulic ram; expanded and contracted on demand?

It sure looked that way.🤔
 
Check out this video of Clibon that Woody and Adamwende mentioned. He can manually vary the torque to the rear axle from 0% to 100%. Not what Bdkw1 was going on about, but pretty freaking awesome. Not sure it is $15K awesome, but I am sure it will start showing up a lot more on new cars.


Really cool.

I can see the use for this but I'd have a hard time calling this a center diff. It's more of a manually operated clutch on a rear output.

Def not 15k$ cool to my use, but would totally make sense in a comp car of this magnitude.
 
I've talked about something similar with friends. A lever operated clutch like used on a drilling rig table or some ag equipment PTO so you can slip rear end to drive front when needed for that front bite or turn. Be curious what he is using.
 
I had forgot about the side hill issue with OD front. I'd think a front selectable would help even more there?

Sometimes it's easy to get caught up in climbing ability and forget that you're only doing that occasionally. :laughing:
If you are side-hilling going forward I'd think that as the natural tendency is for you to need to steer uphill slightly that a sub 10% front OD would help you side-hilling. That's my thought anyway. Someone try it and video please, well, have someone who will probably survive video please!:flipoff2:
 
The Campbells used to do that when competing in rockcrawling.




How having a center diff would help the situation in a rockcrawling application ? You don't want any differential action.
Buckwild on the old board ran a LT230 a KOH. It worked well. He used the torque biasing center diff from Quaffie. They also have a lock for the center diff if you really need it.
 
I've talked about something similar with friends. A lever operated clutch like used on a drilling rig table or some ag equipment PTO so you can slip rear end to drive front when needed for that front bite or turn. Be curious what he is using.
On a lower power side, some FWD based AWD vehicles (Ford and Volvo for sure) have a wet clutch pack attached to the input of the rear diff to vary much torque can be sent to the rear end.
I think Haledex was one of the first to come out with it, Ford made their own version and switched back and forth depending on the torque requirements.

Aaron Z
 
I still wonder why no one has made a legit electric moonbuggy. If you're willing to spend $15k on just a disconnect clutch, I'd think you could make a functional rig with a motor on each axle.

Guys did this years ago with rc and found that being able to vary the speed of each axle independently was pretty great.
 
I still wonder why no one has made a legit electric moonbuggy. If you're willing to spend $15k on just a disconnect clutch, I'd think you could make a functional rig with a motor on each axle.

Guys did this years ago with rc and found that being able to vary the speed of each axle independently was pretty great.
Weight and range.
 
The problem with that Euro shit is that the service parts it takes to go through something and make it in good shape is just so damn expensive.
? I ordered a diff from a stateside vendor and had if in 4 days. Granted, that was before clown world took over.

After he got the oil pump figured out it stopped eating gears.
 
Weight and range.
I'd say controllers are more the issue then those 2. It's sort like the jump from wiring a carb rig to an efi one. little learning curve there.

I'm not sure how the feedback would work either. An RC car you can see it get bound up most of the time, some time's it's just snappy snap. How would that work in a rig where you can't see everything. Sure someone will be doing something soon.
 
king of the hammers is out, but all that short course racing seems optimal for lectric.
Only if you have multiple batteries. If there are more than 2 heats in a day you couldn't recharge in time. And if you did need to recharge, better have a good genset.
 
There is a guy cr-fab on insta that has started building a dual motor buggy. It's not clear what the plan is just yet, but he is using a Jessie Haines chassis.

I think the issue with a light weight buggy like this is still going to battery range. There just isn't much space for a battery pack. You'd need to have swappable battery packs or bring along some means of charging it.

I like clibons idea with some form of output clutches, but I do wonder at what point are there simply to many things for a driver to control while trying to maneuver through an obstacle.
 
king of the hammers is out, but all that short course racing seems optimal for lectric.

KOH is out for EVs?

Did something happen to the EV class?


Ultra4 Racing and King of the Hammers Announces Exciting
Grassroots EV Racing Program

February 3, 2022 (Johnson Valley, CA) – On a cold, windy dry lakebed in Southern California, Ultra4 Racing and King of the Hammers founder & CEO Dave Cole announced an Electric Vehicle (EV) spec racing program designed to jumpstart innovation in the off-road world, and motorsports at large.

This is no ordinary lakebed though, it is the home to King of the Hammers, the biggest off-road race in the United States and the collection of what is widely known as the toughest one-day races in the world. This week, tens of thousands of fans and over 500 race teams have gathered in the makeshift city of Hammertown for the 16th King of the Hammers. What makes this event stand apart are the people who have built it and those who race it. Drivers here don't just show up and strap in, they are the vehicle builders, the fabricators, the masterminds who design the racecars they believe can win on this brutal, unforgivable rocky terrain.

At 11 am, a gap in the racing action was made for Cole to present to the world the EV spec racing program to the racers and fans onsite and live online.

It was here that Dave Cole announced the creation of the EV Spec Racing Program, complete EV crate packages from Hypercraft and Dana Incorporated, along with supporting components provided by Yukon Gear and Axle and Holley/AEM. All participating companies will provide engineering expertise to partner teams. The crate packages will be provided to eleven hand selected Ultra4 Racing teams who have committed to developing and building EV-powered vehicles and racing them for the next three years. The first race for these new EV race cars will be in July 2022 at Attica, Indiana, and they will compete in Sturgis, SD and at the Ultra4 Nationals as well.​
 
? I ordered a diff from a stateside vendor and had if in 4 days.
Yeah but at what cost? :laughing:


Could be, the older versions in Volvos were sensitive to tire size differences.
No idea how the RAV4 did it.

Aaron Z
Someone here replaced one and it had some fuckhuge actuator on the pinion for da emm pee gees. I forget if that was the glitter source or not.
 
KOH is out for EVs?

Did something happen to the EV class?

No mention of an electric vehicle class in the rule book. I think the guy who did it twice was a ‘proof of concept’ and the comment about KOH was focused on the distance required and batteries required. Even the guy who entered KOH twice has battery pack swaps at remote pits and it took like 45 minutes I think. He only completed one lap which is all the ‘class’ required. Again, my personal opinion is he was allowed to do it as a proof of concept, and because of his network of friends.

 
There is a guy cr-fab on insta that has started building a dual motor buggy. It's not clear what the plan is just yet, but he is using a Jessie Haines chassis.

I think the issue with a light weight buggy like this is still going to battery range. There just isn't much space for a battery pack. You'd need to have swappable battery packs or bring along some means of charging it.

Thomas Meiser is also building a MOA buggy.

I like clibons idea with some form of output clutches, but I do wonder at what point are there simply to many things for a driver to control while trying to maneuver through an obstacle.

Have you seen any of the Rock Dogs built by Alec Yaeger? :laughing:



KOH is out for EVs?

Did something happen to the EV class?

They had to work out some issues with the spec packages they provided to the chosen teams. Dave Cole made some comments about it over on Rac-Dezert if you want to dig deeper.
 
Buckwild on the old board ran a LT230 a KOH. It worked well. He used the torque biasing center diff from Quaffie. They also have a lock for the center diff if you really need it.
Sure.
And it ended up being heavier, weaker and way more expensive and complex than an Atlas...

Pass
 
I’m an East coaster I might pay attention to three hours of KOH racing content a year.

It’s cool there’s an ev class, how many participants?:laughing:
 
I’m an East coaster I might pay attention to three hours of KOH racing content a year.

It’s cool there’s an ev class, how many participants?:laughing:


Sounds like there are at least 12 guys with the Spec powertrain, but they won't be competing until 2024.

From Dave Cole:
I drove the very first car yesterday for the first time.

We have have delivered motors and inverters but had significant challenges in Integration.

HyperCraft has done an amazing job putting the package together.

100% racing in 2024 KOH

And as far as why you didnt get one...I rewarded the teams that won their Championships that year or had been racing generationally with our series.

Each powerpack is around 60k out of pocket, times 12 packs delivered.

I don't know if there is anyone besides Kyle Seggelin running in the EV class this year, but they race during the EMC race. Dave promised a $1,000,000 purse to anyone who wins KOH with an EV :smokin:
 
Sure.
And it ended up being heavier, weaker and way more expensive and complex than an Atlas...

Pass
It stood up to 650?hp and a stick. So, not exactly weak. Weighs the same as an Atlas, cost is about the same or less. I talked to him about getting the pump for mine. Not needed at my power level, weight and tire size.
 
Top Back Refresh