Future of KOH 4400 chassis/car development?

[mobil1syn]

it did slow him down. he pushed, took out a driveshaft and smashed his diff.

if you want to be fast in the dezert with you need sprung weight and the hp to smash them hoops. you can trade weight for durability but thats a fine line to walk.

 

[Jeffh555]

I expected it to slow him down more, from the sounds of it Wayes did too.

He was also running rock trails with no traffic. He would have had a hard time making a pass like Gomez or Chaney did around Rodd and Schererer.

 

[AgitatedPancake]

Speaking of that, did you guys see the pass that Marcos (I think?) pulled? Hell of a line

 

[Jeffh555]

Speaking of that, did you guys see the pass that Marcos (I think?) pulled? Hell of a line

That's the one I was thinking of, and I said Gomez because who knows which one it was.

 

[Beat95yj]

That's the one I was thinking of, and I said Gomez because who knows which one it was.

I think two Gomez’s took that line.

 

[ridered3]

That's the one I was thinking of, and I said Gomez because who knows which one it was.

Good way of hedging your bets! Between 3 Gomez Brothers racing, one Gomez son racing, 1-2 adopted Gordon-Gomez racing, and whoever else is racing under the Joe Thompson/Gomez flag, that's like 1/10 of the field

 

[Yotota]

Not any more but I bet it comes back around

It better!

Watching the difference in performance climbing backdoor was always a highlight. Either driving skill or winching skill. But the good driver/codog teams earned their times, and the bad ones floundered and deservedly lost time.

 

[ridered3]

Speaking of that, did you guys see the pass that Marcos (I think?) pulled? Hell of a line

Heck of a pass and example of gotta do what ya gotta do.

Schererer-er complimented him in an interview of that pass. Saying he would have never even thought to try that line.

 

[Tech Tim]

So all this talk about weight and size, let's get down to the biz of making things smaller and lighter.

Your biggest weight and size adders are the 40"+ tires, the engine/trans/t-case and the axles.

So the first step would be to drop tire size, that effects everything else.

Leading us to the question: Can 37" tires be competitive in the 4400 class at KOH?



Yeah, yeah, a golf cart crossed the line first on 37s blah, blah, blah.....

 

[chaplinfj60]

so your saying all paths lead back to the golf cart...

 

[Arickvan]

So all this talk about weight and size, let's get down to the biz of making things smaller and lighter.

Your biggest weight and size adders are the 40"+ tires, the engine/trans/t-case and the axles.

So the first step would be to drop tire size, that effects everything else.

Leading us to the question: Can 37" tires be competitive in the 4400 class at KOH?



Yeah, yeah, a golf cart crossed the line first on 37s blah, blah, blah.....

After some more thought, really all the other cars are just hoping for the top couple guys to have a bad day, heavy high power cars dominate until they break or flop

 

[JR4X]

Leading us to the question: Can 37" tires be competitive in the 4400 class at KOH?

Yes - because see below. It works because it’s light and it’s scaled down proportionally to the tire size. The SXS itself is never really gonna cut it because they’re too fragile for this. But 3000 pounds 100 and change inch wheel base, 80 inches wide. Tons of travel. Probably can’t one shot back door but a lot of the trails it’ll blast through the stuff the 130 WB 100” wide cars have to belly over like a seal.

Yeah, yeah, a golf cart crossed the line first on 37s blah, blah, blah.....

 

[Treefrog]

What else can be done to reduce solid axle unsprung weight? Different materials for housings, axle shafts, or knuckles? Better designed trusses? Full fab axle housings instead of tube? Less power? Smaller tires? Smarter drivers? TTB?

 

[ridered3]

After some more thought, really all the other cars are just hoping for the top couple guys to have a bad day, heavy high power cars dominate until they break or flop

Basically that's the case for any form of organized racing when you aren't one of the Top 5-10 people though.

 

[Bebop]

What else can be done to reduce solid axle unsprung weight? Different materials for housings, axle shafts, or knuckles? Better designed trusses? Full fab axle housings instead of tube? Less power? Smaller tires? Smarter drivers? TTB?

According to the latest Sema show research, bluetooth driveshafts and axleshafts are the future

 

[mobil1syn]

single seat, utv front end, turbo'd 4cyl, auto trans, toyota rear end, 32 gals of fuel, fancy tensors class 10 tires for lap one, stickies for 2&3.

 

[Bebop]

single seat, utv front end, turbo'd 4cyl, auto trans, toyota rear end, 32 gals of fuel, fancy tensors class 10 tires for lap one, stickies for 2&3.

PRIVATEER MOTORSPORTS/ASSAULT INDUSTRIES YXZ1000R TURBO RACE CAR
 - UTV Guide

With UTVs representing the fastest-growing segment of offroad racing, it’s quite common to come across spec-built race machines in the deserts of Southern California. What isn’t common, however, is to come across one that is seemingly a hybrid between a Yamaha YXZ1000R and a Baja-developed...

utvguide.net

Done a while back too

350hp out of the 1000cc engine.

 

[mobil1syn]

PRIVATEER MOTORSPORTS/ASSAULT INDUSTRIES YXZ1000R TURBO RACE CAR
 - UTV Guide

With UTVs representing the fastest-growing segment of offroad racing, it’s quite common to come across spec-built race machines in the deserts of Southern California. What isn’t common, however, is to come across one that is seemingly a hybrid between a Yamaha YXZ1000R and a Baja-developed...

utvguide.net

Done a while back too

350hp out of the 1000cc engine.

bluetooth front end

 

[Bebop]

bluetooth front end

I'm telling you, the future is now

 

[mobil1syn]

I'm telling you, the future is now

 

[Penetrode Offroad]

Pretty sure thats AgitatedPancake

 

[Sean]

What else can be done to reduce solid axle unsprung weight? Different materials for housings, axle shafts, or knuckles? Better designed trusses? Full fab axle housings instead of tube? Less power? Smaller tires? Smarter drivers? TTB?

Is anyone running aluminum 3rds on the 9/10" fabbed housings with a good skid (GearWorks and other people make them, though they'd be easy enough to fab yourself) and having them survive something as taxing as KOH? It wouldn't save a ton of weight but pretty significant compared to the nodular iron ones.

 

[Arickvan]

Basically that's the case for any form of organized racing when you aren't one of the Top 5-10 people though.

true, i guess that SXS did get 5th when it was broken

someone needs to build something and figure this out

 

[AgitatedPancake]

Pretty sure thats AgitatedPancake

His hair isn't nearly glorious enough to be me


I can't wait to see what the next generation of U4 cars look like. Fair points are being made that big cars are still doing just fine, but I believe we're at the end of the era of cars getting bigger and bigger. It will be cool to see the innovation that hopefully comes along with that

 

[Tech Tim]

Is anyone running aluminum 3rds on the 9/10" fabbed housings with a good skid (GearWorks and other people make them, though they'd be easy enough to fab yourself) and having them survive something as taxing as KOH? It wouldn't save a ton of weight but pretty significant compared to the nodular iron ones.

Biggest problem with aluminum 3rds would be flexing of the ring and pinion in the case.

Better through bolt the main caps through the housing.

 

[Jeffh555]

single seat, utv front end, turbo'd 4cyl, auto trans, toyota rear end, 32 gals of fuel, fancy tensors class 10 tires for lap one, stickies for 2&3.

Which UTVs have a driveshaft running to the rear diff that could be run to a rear solid axle?

Honda Talon does, but I'm not sure if anyone is above 200hp with that powertrain.

I haven't looked under a Maverick R or Pro R.

 

[JR4X]

Which UTVs have a driveshaft running to the rear diff that could be run to a rear solid axle?

Honda Talon does, but I'm not sure if anyone is above 200hp with that powertrain.

I haven't looked under a Maverick R or Pro R.

The Pro R has an actual rear diff instead of the bull shit transaxle thing

 

[Tech Tim]

single seat, utv front end, turbo'd 4cyl, auto trans, toyota rear end, 32 gals of fuel, fancy tensors class 10 tires for lap one, stickies for 2&3.

So a real trend setter type rig?

 

[Tech Tim]

So far we've got the tires settled on 37s.

Next up engine.... Which one?

Inline 4 to keep things small and tight or a V-6?

• Gotta hold up to 6 hours of hell.
• How much power?
  
  

 

[Arickvan]

So far we've got the tires settled on 37s.

Next up engine.... Which one?

Inline 4 to keep things small and tight or a V-6?

• Gotta hold up to 6 hours of hell.
• How much power?
  

what motors are the rally guys running?

one of those tuned down a bit could be interesting