Go Back   oOple.com Forums > Car Talk > Schumacher

Reply
 
Thread Tools Display Modes
  #1  
Old 21-11-2017
bish's Avatar
bish bish is offline
Member
 
Join Date: Dec 2007
Location: Texas, USA
Posts: 173
Default KC setup advice needed - carpet

I need some carpet setup advice, I started with the kit setup for carpet and made some minor tweaks (front and rear roll bars), lighter diff oil.

Thing is, it's traction rolling mid corner. If i go easy, it's fine, plenty of steering in the sharp corners at lower speed, but that's not fast lapping! I tried adjusting the roll centre to prevent chassis roll, still traction rolls. Maybe the car is too 'locked' in and i need the back end to be more loose?
I'll upload the setup sheet when i'm on a computer that'll allow it.

Chassis is carbon, position 3
Front - yellow springs, 45wt, no internal limiters. 1.2mm roll bar, short upper link with 1mm spacer
Rear - Green springs, 35wt, no internal limiters. 1.1mm roll bar, long upper link, 2mm spacer
Ride height 15mm
Camber -1 all round

Question is, should i just copy the Orlowski Trencin setup for carpet? It's not like he was driving a badly setup car is it?!

Thanks in advance.
__________________
Tryin' to race in Texas!
Schumacher - Tekin - MRT - Futaba
Reply With Quote
  #2  
Old 21-11-2017
bish's Avatar
bish bish is offline
Member
 
Join Date: Dec 2007
Location: Texas, USA
Posts: 173
Default

Thanks to Aiden for hooking me up will Allan O'Brien and David Snee, who are helping unravel my setup!

I'd raised the roll centre (shorter top links and lowering the inner link ball position) hoping it would stop the chassis rolling, what it was doing though, was increasing the grip so much that it caused traction roll! So lengthening the upper links (and raising the inner ball link) has lowered the roll centre. yes, the back is a little looser, but it's not traction rolling half as much. I can chase the local track rats through the infield now :-)
__________________
Tryin' to race in Texas!
Schumacher - Tekin - MRT - Futaba

Last edited by bish; 03-12-2017 at 01:17 AM.
Reply With Quote
  #3  
Old 09-12-2017
Paultje040's Avatar
Paultje040 Paultje040 is offline
Member
 
Join Date: May 2013
Location: Eindhoven
Posts: 136
Default

I run a bit heavier oil. 50/40wt and 1.5mm droop limiters.
A can realy advise you to try position 2 on carpet.

I tried pos. 3 and found 2 way better with the same setup.

Can post my setup if you like.
__________________
Schumacher KC - Tekno EB48.3
Reply With Quote
  #4  
Old 09-12-2017
Paultje040's Avatar
Paultje040 Paultje040 is offline
Member
 
Join Date: May 2013
Location: Eindhoven
Posts: 136
Default

My setup for EOS carpet.

Have to try some different springs, like blue front and rear.

No griproll on new tires. Think i can get some more cornerspeed out of it.
Attached Images
File Type: png IMG_20171209_142518.png (768.1 KB, 100 views)
__________________
Schumacher KC - Tekno EB48.3
Reply With Quote
  #5  
Old 11-12-2017
bish's Avatar
bish bish is offline
Member
 
Join Date: Dec 2007
Location: Texas, USA
Posts: 173
Default

Oh cool, thank you. I've yet to try position 2! Think i'll have to try it soon. Appreciate the setup and oil weights.
__________________
Tryin' to race in Texas!
Schumacher - Tekin - MRT - Futaba
Reply With Quote
  #6  
Old 11-12-2017
dikke hond's Avatar
dikke hond dikke hond is offline
Member
 
Join Date: Jan 2011
Location: Netherlands
Posts: 132
Default

Quote:
Originally Posted by Paultje040 View Post
My setup for EOS carpet.

Have to try some different springs, like blue front and rear.

No griproll on new tires. Think i can get some more cornerspeed out of it.
Thanks!
__________________
- Bmax -
Reply With Quote
  #7  
Old 2 Weeks Ago
adey's Avatar
adey adey is offline
Senior Member
 
Join Date: Mar 2010
Location: west midds
Posts: 755
Default

if anyone could help i am having an issue with my kc on carpet.
i am using the carpet starting setup and it seems ok but the rear end rises considerably under power. it seems to rise considerably and makes the car unstable on the fast corners when pushed. i have played with the anti squat but it still seems to do it. i am wondering if the motor rotation is the reason. dress anybody know of a way i can try to reduce this. many thanks
Reply With Quote
  #8  
Old 2 Weeks Ago
stuey stuey is offline
Member
 
Join Date: Nov 2007
Posts: 258
Default

When the car is sitting at its ride height, what angle are the driveshafts? Are they at an angle pointing downwards towards the diff?
Reply With Quote
  #9  
Old 2 Weeks Ago
Paultje040's Avatar
Paultje040 Paultje040 is offline
Member
 
Join Date: May 2013
Location: Eindhoven
Posts: 136
Default

Quote:
Originally Posted by adey View Post
if anyone could help i am having an issue with my kc on carpet.
i am using the carpet starting setup and it seems ok but the rear end rises considerably under power. it seems to rise considerably and makes the car unstable on the fast corners when pushed. i have played with the anti squat but it still seems to do it. i am wondering if the motor rotation is the reason. dress anybody know of a way i can try to reduce this. many thanks
I like running a rear swaybar. It adds stability on corners when pushed. Even a thin one helps.
__________________
Schumacher KC - Tekno EB48.3
Reply With Quote
  #10  
Old 2 Weeks Ago
adey's Avatar
adey adey is offline
Senior Member
 
Join Date: Mar 2010
Location: west midds
Posts: 755
Default

the driveshafts are pointing down towards the diff. i wondered if raising the diff would help the issue.
Reply With Quote
  #11  
Old 2 Weeks Ago
stuey stuey is offline
Member
 
Join Date: Nov 2007
Posts: 258
Default

That's what I was going to suggest. A guy who knows his stuff told me recently that the driveshaft will try and straighten themselves under power, so if they are pointing down they are trying to lift the back of the car. If you can raise the diff so the driveshafts are about level at ride height it may help.
Reply With Quote
  #12  
Old 2 Weeks Ago
Paultje040's Avatar
Paultje040 Paultje040 is offline
Member
 
Join Date: May 2013
Location: Eindhoven
Posts: 136
Default

Quote:
Originally Posted by adey View Post
the driveshafts are pointing down towards the diff. i wondered if raising the diff would help the issue.
Yesssss high diff will help. Didnt mention that as high diff is kit standard
__________________
Schumacher KC - Tekno EB48.3
Reply With Quote
  #13  
Old 1 Week Ago
Allan1875 Allan1875 is offline
Senior Member
 
Join Date: Nov 2010
Location: Scotland
Posts: 580
Default

Quote:
Originally Posted by stuey View Post
That's what I was going to suggest. A guy who knows his stuff told me recently that the driveshaft will try and straighten themselves under power, so if they are pointing down they are trying to lift the back of the car. If you can raise the diff so the driveshafts are about level at ride height it may help.
This is more accurate with CVD driveshafts. With universal joints, they don't straighten so much under power and that's why they tend to ride bumpers better.
__________________
Ardgay Models
Schumacher
REDS
Mark One Designs
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 05:35 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
oOple.com