My KOH Experience

GONOVRIT said:
As said already, good job, great write up and thanks for sharing!

What was the issue with the rear driveshaft? What does your drivetrain consist of?
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The drivetrain is a GM 5.3, 4l60e, and Atlas 2 speed. This replaced a 4.0, 42RE, and 241 transfer case.

The driveshaft is relatively short and at a steep angle and it was suggested a double cardan joint wasn't needed. That didn't work at all, so we had to have one added to my old driveshaft just before leaving. I was so far behind on the build that it wasn't discovered until the week we were to leave. Ended up using the older shaft as the main one and the brand new shaft was the spare. I have plans to lower the transfer case to get better angles but that's the gist of it.
 
livetorun said:
The drivetrain is a GM 5.3, 4l60e, and Atlas 2 speed. This replaced a 4.0, 42RE, and 241 transfer case.

The driveshaft is relatively short and at a steep angle and it was suggested a double cardan joint wasn't needed. That didn't work at all, so we had to have one added to my old driveshaft just before leaving. I was so far behind on the build that it wasn't discovered until the week we were to leave. Ended up using the older shaft as the main one and the brand new shaft was the spare. I have plans to lower the transfer case to get better angles but that's the gist of it.
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What size joints are you running in the rear?

Was there a reason you decided to swap drivetrains right before the race?

And the big question i cant believe noones asked yet, what's next?
 
paradisePWoffrd said:
What size joints are you running in the rear?

Was there a reason you decided to swap drivetrains right before the race?

And the big question i cant believe noones asked yet, what's next?
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1350 joints all around and the drivetrain swap started in September along with a new front suspension and new interior. It was a very ambitious schedule and being the amateur I am, everything took 3 times longer than it should have. We went from 100% trail rig to semi-race car so a lot of stuff got changed along the way.

For now, just some relaxing trail riding. Who knows what the future will bring, next February is a long way off.
 
livetorun said:
No single moment, lots of little things...the rock trails really nickel and dime you to death and then add traffic on top of that and there was a lot of sitting and waiting. I made some driving mistakes getting hung up in the rocks. Each of those probably cost us 2-3 minutes. Waiting on traffic probably cost us over an hour. We could've gone faster but then there is a higher risk of breakage which would've cost more time. Way too many variables to consider.
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I notice what you DIDN'T say was the time lost stopping to help people, like uprighting that guy and trying to help push the other fella up.
Which IMO is great. Sadly, you really win you have to ignore the plights of others, but the camaraderie is priceless.
 
RatLabGuy said:
I notice what you DIDN'T say was the time lost stopping to help people, like uprighting that guy and trying to help push the other fella up.
Which IMO is great. Sadly, you really win you have to ignore the plights of others, but the camaraderie is priceless.
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Supposedly you get a time credit for stopping to help an overturned vehicle if it can be verified by GPS. We actually did appeal for a time credit thinking it might be enough but after looking at the on board footage, we only lost 5 minutes righting the one car so I didn't follow up on it since it wasn't enough.
 
livetorun said:
1350 joints all around and the drivetrain swap started in September along with a new front suspension and new interior. It was a very ambitious schedule and being the amateur I am, everything took 3 times longer than it should have. We went from 100% trail rig to semi-race car so a lot of stuff got changed along the way.

For now, just some relaxing trail riding. Who knows what the future will bring, next February is a long way off.
Click to expand...

I would look into 1410 rear joints. You can get more angular travel than 1350 (~17°). Might be enough or allow less mods to get you there.
 
Wow! Congrats on getting the car through the course. I got to see the rig in person and was in the crowd when you crossed the finish line. What a rush man!
 
Great write up. Its cool to learn that you could get time awarded for helping right side up others. I was thinking like ratlab, about how much time you might have lost.
Even though I'll never race koh, I at least need to get my self out there to help friends and spectate. Ah..2018...

Again, congrats to you and everyone who helped you get there.
 
paradisePWoffrd said:
I would look into 1410 rear joints. You can get more angular travel than 1350 (~17°). Might be enough or allow less mods to get you there.
Click to expand...
That's definitely an option but I'd like to keep all the driveshaft u-joints the same for simplicity if possible. And also, I dont want to have to make more driveshafts after the headaches the first time around.
 
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