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09-15-2015, 10:37 AM
| #1 |
| Rock Crawler Join Date: Feb 2006 Location: Where the foams are always wet
Posts: 878
|  Sourdough U4RC
Well I won this sweet chassis last weekend made by UCFAB. This thing is VERY VERY nice! So here I am dabbling into the scale side again, haha    And a picture of my cluttered "Work Bench" at the Mercedes Dealership I work at.  |
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09-16-2015, 04:06 PM
| #2 |
| I wanna be Dave   Join Date: Apr 2010 Location: Oakridge
Posts: 3,305
| Re: Sourdough U4RC
What are you waiting, lets see some progress????!!!!!  |
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09-17-2015, 01:12 PM
| #4 |
| RCC Addict Join Date: May 2012 Location: Folsom
Posts: 1,867
| Re: Sourdough U4RC
I was wondering who won that chassis! That was given away before judges were done running.... there is far too much light in the picture to denote anything other wise. hahahaha enjoy!
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09-17-2015, 01:28 PM
| #5 | |
| Rock Crawler Join Date: Feb 2006 Location: Where the foams are always wet
Posts: 878
| Re: Sourdough U4RC Quote:
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09-17-2015, 01:48 PM
| #6 |
| RCC Addict Join Date: May 2012 Location: Folsom
Posts: 1,867
| Re: Sourdough U4RC
Friday night giveaway! cool!
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09-18-2015, 12:33 PM
| #7 |
| Rock Stacker Join Date: Nov 2014 Location: On the internet, confused.
Posts: 85
| Re: Sourdough U4RC
Awesome chassis! 10/10 for the bends in the lower front bar and the variation in tube size! Sent from my Nexus 5 using Tapatalk |
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09-18-2015, 01:42 PM
| #8 |
| RCC Addict Join Date: Aug 2013 Location: Missoula
Posts: 1,346
| Re: Sourdough U4RC
Bad ass chassis. Back to my 642 oil cooler job. We have a nice little U4 track behind the shop out here. |
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12-10-2015, 03:46 PM
| #9 |
| Rock Crawler Join Date: Feb 2006 Location: Where the foams are always wet
Posts: 878
| Re: Sourdough U4RC
I finally have some updates for you guys. I have slowly been collecting parts (Nothing Integy, that was a joke), and this truck is now a roller. I went over to the CreationFab shop to make a custom skid plate that would allow the use of Yeti trailing arms. But after drawing everything out, it wasn't going to work. So I decided to build this the way it was intended, as a Wraith. Parts recently added: Proline F150 Raptor body for Yeti (heavily modified) Wraith skid Vanquish Wraith 3/16" link kit RC4WD AX2 transmission AR60 axles (Underdrive rear gears, Hardened stock front gears from RS4MT) Black Shift Hubs RcBros Carbon Fiber Wheels Pitbull Growler A/T Tires CI 2 stage foams Losi Night Crawler drivelines      Last edited by sourdojack; 12-11-2015 at 11:20 AM. |
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12-10-2015, 09:11 PM
| #10 |
| I wanna be Dave Join Date: Aug 2006 Location: under a rock and a hard place
Posts: 5,443
| Re: Sourdough U4RC
Damit Tom, I was looking forward to all tne integy hawtness.  |
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12-16-2015, 06:02 PM
| #11 |
| Rock Crawler Join Date: Feb 2006 Location: Where the foams are always wet
Posts: 878
| Re: Sourdough U4RC
A couple more updates: I took the chassis over to my friends at Buster Beaver Design in Wilsonville OR. They specialize in ceramic coating for firearm's and such. They do FANTASTIC work and pay a great attention to detail. I blasted the chassis with some kind of aluminum oxide stuff (wasn't really listening) and I should have it back all coated by this weekend! Anyone want to guess on the color I am choosing?     |
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12-16-2015, 06:11 PM
| #12 |
| RCC Addict Join Date: Mar 2009 Location: The REAL Nor-Cal
Posts: 1,049
| Re: Sourdough U4RC
DUCKS Yellow?
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12-16-2015, 06:19 PM
| #13 |
| Rock Crawler Join Date: Feb 2006 Location: Where the foams are always wet
Posts: 878
| Re: Sourdough U4RC
As far as drive lines... I have a theory that the reason people are wiping out Ring and Pinion sets and pinion bearings, is due to heavy, out of balance drive lines. These are a few things I thought of about pinion bearing failures, that I think are overlooked. -The pinion bearing essentially carries the weight of the drive line. -The further away the CV joint of the drive line is away from the pinion bearing, bearing load drastically increases. -The MIP drive lines dont spin true, and get worse when the splines are extended. -The angle of the pinion in relation to the transmission have effect on vibration and bearing load -All of these issues didn't really matter on crawlers due to the lower RPM and HP. But with these trucks going like 30mph and 2HP motors, these forces are really causing issues in reliability. So on this truck, I am going to try to use my favorite drive line from over the years (and it worked out perfect). And that is the drive line from a LOSI Night Crawler. I happened to make a hybrid drive line for this truck using the LNC and Twin Hammers pieces. The Twin Hammers CV joint uses the 3rd generation (strongest) style with spiral lock ring holding the cross pin into place. And the LCC drive shaft fits into it perfectly. They are light weight, spin true, compact and fairly strong. The down side is you are relying on the drive cup for your drive line travel. So trucks with a lot of slip required can't use these. And they are only made in one length. Which happens to be perfect for a stock wheelbase Wraith with a RC4WD AX2 trans. Here are some pictures:    |
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12-27-2015, 01:15 PM
| #14 |
| Rock Crawler Join Date: Feb 2006 Location: Where the foams are always wet
Posts: 878
| Re: Sourdough U4RC
So I decided to have the chassis ceramic coated in clear. I couldn't dare cover up those beautiful braze welds!  |
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12-27-2015, 01:27 PM
| #15 |
| Rock Crawler Join Date: Feb 2006 Location: Where the foams are always wet
Posts: 878
| Re: Sourdough U4RC
My friend Jason suggested I do blue panels. So I found a transparent blue I liked, then I backed it in silver to make it sparkle haha   Last edited by sourdojack; 12-27-2015 at 02:37 PM. |
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12-27-2015, 01:32 PM
| #16 |
| Rock Crawler Join Date: Feb 2006 Location: Where the foams are always wet
Posts: 878
| Re: Sourdough U4RC
Jake from Y Town crawlers makes a really nice simple servo /link mount. And I love how well it fits! I just need to counter sink the screw that goes into the diff and it will be perfect.   |
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12-27-2015, 01:47 PM
| #17 |
| Rock Crawler Join Date: Feb 2006 Location: Where the foams are always wet
Posts: 878
| Re: Sourdough U4RC
I was able to use the LNC driveshafts on front and rear, still using the VP links and rod ends. I don't know the stock position of the link mounts (since I am building this from scratch). But I flipped the link mounts so the rear is out further, and front is closer. That made everything fit perfectly. I clearanced the rear diff area and mounted the sway bar with the lower links. Everything just barely clears.  Last edited by sourdojack; 12-27-2015 at 02:36 PM. |
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12-29-2015, 07:12 PM
| #18 |
| Pebble Pounder Join Date: Sep 2013 Location: matane
Posts: 151
| Re: Sourdough U4RC
what exactly are your mods for your drive shaft??i am curious to see a little more what it is???and nice u4 rigs.
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12-29-2015, 08:35 PM
| #19 |
| Rock Crawler Join Date: May 2007 Location: Corona, CA
Posts: 581
| Re: Sourdough U4RC
Wow! Really like the way you cut that body up to make that chassis even more awesome!
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12-30-2015, 08:40 AM
| #20 |
| Y-Town Crawlers   Join Date: Oct 2005 Location: Not Hesperia
Posts: 2,481
| Re: Sourdough U4RC
Truck is looking great Tom! Are you running any tubes inside the axle housings? I made some short threaded rings for the axle tube side of the servo mount that adds a lot of beef to the mounting point and only weight a few grams. I'll drop one in the mail for you if you need one. |
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