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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
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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 03-20-2018, 02:33 PM
  #841  
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Default Blanks

Originally Posted by DiscountRCStore
Is there interest in both the small and big bore blanks ? one or the other ? We've considered having these made but struggled to gauge interest ... We could have them done relatively easy if there are enough wanting them ..


..p
Sure sounds good to me! Small bore
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Old 03-21-2018, 11:00 AM
  #842  
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New Cat L1 is out of the bag!
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Old 03-21-2018, 11:37 AM
  #843  
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So stoked. Looks amazing. I can't wait. Discountrcstore.com already has my deposit.
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Old 03-21-2018, 12:13 PM
  #844  
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what price on cat L1 kit ?
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Old 03-21-2018, 01:47 PM
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The likely shop price in the UK is about £430, which is about $600.
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Old 03-21-2018, 02:30 PM
  #846  
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Just looking through the exploded diagram of the CAT L1 and it now shows a U7433 which are blank tapered pistons that should be available
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Old 03-21-2018, 08:26 PM
  #847  
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Originally Posted by stueys
The likely shop price in the UK is about £430, which is about $600.
I doubt it. The KC is 349 vs $369. My guess is closer to $450 for us. Don't forget the website price includes a 20% tax hike that we don't have to pay.
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Old 03-22-2018, 02:46 AM
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Originally Posted by scoobyrs25
I doubt it. The KC is 349 vs $369. My guess is closer to $450 for us. Don't forget the website price includes a 20% tax hike that we don't have to pay.
What I mean is that in the UK (where it is produced) we will be paying £430, which is like you paying $600 for it. I have no doubt it will be cheaper in the US, even after it has shipped thousands of miles to get there.
If you can get it for $450, that would be about £325 for us. Quite a big gap I would say.
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Old 03-22-2018, 06:14 AM
  #849  
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Originally Posted by scoobyrs25
I doubt it. The KC is 349 vs $369. My guess is closer to $450 for us. Don't forget the website price includes a 20% tax hike that we don't have to pay.
$550 drc
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Old 01-11-2019, 10:13 PM
  #850  
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Default Hi just bought k2 spur has play??

Have my first k2 great car just checking it over and spur gear has play in it before I strip it will this be the bearings, idle shaft that need replacing?

Thanks
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Old 01-12-2019, 02:08 PM
  #851  
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Originally Posted by Yelreppa
Have my first k2 great car just checking it over and spur gear has play in it before I strip it will this be the bearings, idle shaft that need replacing?

Thanks
If you mean side to side play with the layshaft (and spur) when fully assembled, that happened with mine, and I remember being told a small amount (2mm roughly) is normal. It wont affect the mesh with the pinion, and is harmless. Someone else can correct me if I am wrong.
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Old 10-20-2020, 08:48 AM
  #852  
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If anyone still has this car, could you please measure the diameter of the gear diff casing for me? I am building up a 3D printed 4WD buggy that uses Schumacher K1/K2 belts, and was hoping that the diffs would also fit. You can see my project here:

3D Printing a 4WD Buggy
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Old 03-29-2021, 09:03 PM
  #853  
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Hey Guys,

Does anyone know if the Cat L1 front wishbones will fit onto a K2? I assume the rears will be fine given the fit on the KC.

Cheers,
Scott
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Old 04-03-2021, 10:55 AM
  #854  
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Originally Posted by StupidHead
Hey Guys,

Does anyone know if the Cat L1 front wishbones will fit onto a K2? I assume the rears will be fine given the fit on the KC.

Cheers,
Scott
Compared to the K2, L1 front wishbones are different in a variety of ways. The inner portion is shaped differently (this may be a factor if you have a K1 or K1 Aero that mounts with the U4181 wishbone tube) where the spacing that used to fit the wishbone tube is about 13mm narrower. For the L1 wishbones, the inner pivot pin holes are a larger 3.5mm diameter and the pivot pin hole spacing (between U7369 and U3305) is about 8mm shorter.

Compared to the K2 rear wishbones, the L1 pivot pin hole to pivot pin hole length is slightly shorter (~2mm).

Pictures showing the different arms can be viewed in Cruise's L1 build thread at the following link.

Schumacher CAT L1 der UIT
https://www.rcweb.de/index.php/Threa...AT-L1-der-UIT/
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Old 04-04-2021, 02:07 PM
  #855  
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Champion!
Thanks very much for taking the time to give such a detailed answer.
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