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Schumacher's new K2 4wd buggy ..!

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Schumacher's new K2 4wd buggy ..!

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Old 08-11-2016, 07:12 AM   -   Wikipost
R/C Tech ForumsThread Wiki: Schumacher's new K2 4wd buggy ..!
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Last edit by: AmiSMB
Welcome to the Schumacher K2 Wiki!

Please feel free to add tips and tricks as well as any information that you would feel is beneficial for everyone to know.

Introduction and Pictures Introduction and Pictures

ElectronicsSetupElectronicsSetups

Setup SheetsSetup Sheets

EmulsionShocksEmulsion Shocks

Tony Newland Gear Diff BuildTony Newland Gear Diff Build

Help I Keep Breaking Front Arms

With the K2 Schumacher sarted using an adjustable hub design that required
a relief cut in the arms for the steering knuckle to clear. The easiest solution
until a revised arm is to run the old style arms without the relief cut. Run the
hubs in the High position and set your steering end points down so the steering knuckles don't hit.

SCHU3597
SCHU3407 MED Flex

There is a newer batch of the SCHU3407 wishbones which correct the weakness in the previous front arms.

Suggested upgrades/spares
Strongly suggest to buy 10 alloy front alloy pivot blocks-U3556 the A & B front plastic pivot blocks-U4798 will break soon.

Have some shock seats spares, alloy v1-U3611, plastic-U3937, alloy v2 (off-road)-U4890

Have some spare shock shafts available U3668 & U3669
MIP pucks an Excellent option!

Misc

Other wheels that fit apart from the Schumacher wheels
Losi 22-4 wheels will fit on the front the rears will work as well!
AE b4, b5 & b6 will fit on the rear
Be sure to lock tight the track screws and rear strap this is a must!!!

AE (12mm) and KYO fronts will work with .5mm spacer - available through AVID


Don't buy the purple titanium turnbuckles as an upgrade there thread is too small and they wander too much. Lunsford Super-duty titanium turnbuckles fit very well they are 3.5mm threads. Get the 1 3/4", 2 1/8" & 57mm lengths. I did not replace the Centre Track Rod.

** When running the Super Duty turnbuckles with the stock captured ball ends, be sure to check for binding in the front steering and camber links after each run - tumbles and glances off the pipes cause them to flex and slightly twist and can bind up the front suspension ... The fix? - simply take a turnbuckle wrench and twist the link back and then forward to it's original positon .. consider doing this as a maintenance step after each run ..

Suggested Gearing

5.5 - indoor high bite clay 83/20 (+/- 1 tooth for layout and conditions etc)
6.5
7.5
8.5
9.5
10.5
13.5 At SRS Arizona I ran 75/28 buggy was quick! RCM lockout worked great!
17.5 - FDR between 5-6 depending on track. E.g. 35/66 down to 30/69 slipper eliminator in use. Different options within the thread. I use B5M exotek eliminator and file it to fit.

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Old 09-18-2015, 05:42 AM
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Default Schumacher's new K2 4wd buggy ..!

Now Released..!!

Read more here: http://www.racing-cars.com/pp/Car%20...om/CAT_K2.html
Setups :http://www.racing-cars.com/search.as...e1=prodvalue14
On youTube :https://youtu.be/MROHdMoM9II
PetitRC :http://site.petitrc.com/setup/schuma...cherCatK2.html

The full details:

New - Alloy chassis side stiffeners.
New - Multiple battery fitting options. Saddle and shorty options.
New - Captive ball joints.
New - Reverse rotation, mid motor layout.
New - Split top decks for greater flex characteristics and easier maintenance.
New - Compact steering system for improved in-line weight placement with adjustable, dynamic ackerman.
New - Super consistent, industry leading QUAD pad, vented slipper with easy access and NEW Ultra Fine adjustment spring.
New - Optimized narrow chassis shape to improve roll stability. Improved ground clearance on roll.
New - Aerial mount.
New - Ultra low motor mount.
New - Rear pivot straps.
New - Battery thumb screws.
New - Transmission housings.
New - Longer wheelbase.
New - Center-line motor position for lower polar moment.
New - Front yokes with adjustable roll center heights.
New - Stronger outer rear hinge pin.
New - 2.5mm aluminium chassis.
New - 3.0mm aerospace grade carbon fiber top decks.
New - Molded side pods for superb dirt protection.
New - Stronger front, inner hinge pins with new mounting system.
New - Easy access center belt pulley.
New - Sleek, ultra narrow body shell.
New - Large “CLAW” high down force rear wing package.
Optimized 2 belt transmission with efficient low tension Bando belts running on large CNC machined pulleys.
Big bore shocks with big bore “CORE” springs, titanium nitride shafts, threaded collars and twin o-ring sealing.
Medium flex front suspension arms as standard.
Gear Differential with hardened steel gears and super hard outputs. Excellent Diff Life!
Optional ball diff available.
Strong steel universal driveshafts.
28 Rubber sealed, super precision ball bearings throughout.
Horizontally split transmission housings for easy diff access and maintenance.
Class leading suspension geometry with durable components and a huge range of optional alloy parts, offering adjustments to setup your CAT K2 to all track conditions.
Adjustable rear roll centers, inboard toe-in/toe-out, anti-squat and track width (using optional speed secret parts).
Adjustable front roll centers, rake angle and track width (using optional speed secret parts).
Strong, rigid 4mm aero space carbon fiber shock brackets.









Last edited by pchroma24; 11-16-2015 at 08:43 AM. Reason: Updated release info
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Old 09-18-2015, 06:39 AM
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Looks hot....
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Old 09-18-2015, 01:13 PM
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Nice, but it looks so Cat 3k esque.
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Old 09-18-2015, 01:49 PM
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Looks sweet. Oh Mr. Andrade.............
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Old 09-18-2015, 01:59 PM
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What is the pulley with side gear and spring? Is that supposed to be the front adjustable brake?
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Old 09-18-2015, 02:29 PM
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Originally Posted by Jpdanger View Post
What is the pulley with side gear and spring? Is that supposed to be the front adjustable brake?
I'm betting that's a one-way clicker, ala' xx4. Effectively, adjustable front brake.
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Old 09-18-2015, 03:17 PM
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Please don't start a thread, just cos you can, and not update the first page with specs, details, modifications, FAQ. Judging by your post count, we don't need 1 hit wonders starting something they cannot finish.

Have a look at the AE threads, all started by people who give a s#it, and willing to update the first post.
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Old 09-18-2015, 03:20 PM
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as much as I like schumacher cars, I'm not liking the rear belt setup. Doesn't look efficient with small pulleys and acute angles!
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Old 09-18-2015, 03:32 PM
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Originally Posted by hacker View Post
as much as I like schumacher cars, I'm not liking the rear belt setup. Doesn't look efficient with small pulleys and acute angles!
Pretty much identical to the KF2 rear drive (using the shorty mod) just with a longer run. Don't think it will be an issue. Granted it's not ideal though...
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Old 09-18-2015, 04:07 PM
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Originally Posted by hacker View Post
as much as I like schumacher cars, I'm not liking the rear belt setup. Doesn't look efficient with small pulleys and acute angles!
The top/loaded run of the rear belt is arrow straight. The lower run is not loaded on power so loses would be minimal.

The upside to the lower run's path is that it increases wrap around the pulleys which will reduce the likelihood of skipping at lighter tension settings.
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Old 09-18-2015, 04:15 PM
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I'd like to see it with saddle packs and maybe a different electronics set up, I like to run my ESC's with a fan.
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Old 09-18-2015, 05:22 PM
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Well for those that never built or owned a Shumacher car, this could be the end to Serpents entry and also the 22-4. Oh the carbon fiber everything. Love it! Belts and diff's out there so easy to maintain.
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Old 09-18-2015, 05:31 PM
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Originally Posted by Roken View Post
Well for those that never built or owned a Shumacher car, this could be the end to Serpents entry and also the 22-4. Oh the carbon fiber everything. Love it! Belts and diff's out there so easy to maintain.
LOL!!!!!!! Right..... Maybe in countries outside the US, the 22-4 is going nowhere. And yes I have owned a couple Schumacher cars, great for super high grip, sucked for anything less.
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Old 09-18-2015, 05:58 PM
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Originally Posted by jpcopeland1 View Post
LOL!!!!!!! Right..... Maybe in countries outside the US, the 22-4 is going nowhere. And yes I have owned a couple Schumacher cars, great for super high grip, sucked for anything less.
What sucked, you or the car.
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Old 09-18-2015, 06:08 PM
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throwing a cat sx3 body and it will be all kinds of sexy
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