R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 05-27-2013, 03:32 AM   #3766
Tech Regular
 
Barry_Hughes's Avatar
 
Join Date: Oct 2004
Location: Ipswich, England
Posts: 417
Default

Quote:
Originally Posted by Skiddins View Post
If you've had to go that extreme with the rollbars you have another problem.

NOBODY runs without a rear roll bar as it effects the transition of the car.

Post your setup so others can have a look and make sure you fill in as much information as possible.

Skiddins
Have to disagree Damien, I ran without the rear roll bar at Eastbourne in the SRL in my last final leg as I was struggling with set up - set the fastest lap and apart from a couple of bad laps (bit of unfortunate maneuvers by other drivers as I was getting past them ) would have won that leg.
Wish I had taken it off a bit earlier
__________________
Built it !
Raced it !
Wrecked it !
Barry_Hughes is offline   Reply With Quote
Old 05-27-2013, 05:18 AM   #3767
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,526
Default

Quote:
Originally Posted by Barry_Hughes View Post
Have to disagree Damien, I ran without the rear roll bar at Eastbourne in the SRL in my last final leg as I was struggling with set up - set the fastest lap and apart from a couple of bad laps (bit of unfortunate maneuvers by other drivers as I was getting past them ) would have won that leg.
Wish I had taken it off a bit earlier
Interesting. I have thinner roll bars in case needed, but I never take them off completely as when I used to do that (a few years ago now) it felt good and did increase rear grip, my lap times suffered as it seemed to be worse on parts of the tracks with changes in direction.
There was always something else that could be changed to give me a better result.
I have never removed them since

Skiddins
__________________
Xray T4'16, T4'14 (Wet Car)
Xray X12 2016
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RD Disco
Skiddins is offline   Reply With Quote
Old 05-27-2013, 08:46 AM   #3768
Tech Elite
 
CristianTabush's Avatar
 
Join Date: Oct 2002
Location: Houston
Posts: 2,676
Trader Rating: 11 (100%+)
Default

Quote:
Originally Posted by cyba888 View Post
guys I am getting understeer and would like to decrease it a little bit more. Also want the car to have better turn in on slower corners.

my current setup on asphalt is below

530CST shock oil front and rear
2.5 springs all around
shocks laid all the way down front and rear
rear diff 2000 oil
stock sway bars and everything else is from stock setup.

I have all the option sway bars and springs to test out just not sure which setting I should touch first
I agree that your oil is a bit thick. Which piston are you running? To get more steering I would start by adding 1mm of of shims to your steering rack for a total of 2mm. After that, go to the short camber links front and rear. Finally shorten your wheelbase in the front and rear of the car by 1mm (bring the front arms back and the rear arms forward).

Sound familiar Damian?
__________________
REFLEX RACING/ RSD/ GIZMO RACING USA/ HOBBYWING/ AXON/ QTEQ/ TEAM PRIME
CristianTabush is offline   Reply With Quote
Old 05-27-2013, 08:58 AM   #3769
Tech Regular
 
Barry_Hughes's Avatar
 
Join Date: Oct 2004
Location: Ipswich, England
Posts: 417
Default

Quote:
Originally Posted by Skiddins View Post
Interesting. I have thinner roll bars in case needed, but I never take them off completely as when I used to do that (a few years ago now) it felt good and did increase rear grip, my lap times suffered as it seemed to be worse on parts of the tracks with changes in direction.
There was always something else that could be changed to give me a better result.
I have never removed them since

Skiddins
I wanted to try thinner bars but only had thicker ones for the rear, no-one else running the T4 had any thinner, so decided to remove it completely.
Funny though at Eastbourne the times improved considerably

Normally like you I always run roll bars.
__________________
Built it !
Raced it !
Wrecked it !
Barry_Hughes is offline   Reply With Quote
Old 05-27-2013, 09:23 AM   #3770
Tech Fanatic
 
cyba888's Avatar
 
Join Date: Jan 2004
Location: Taipei
Posts: 988
Default

Thanks for the tips guys. What do you mean by "go to the short camber links front and rear"

This is the track I run at

http://www.youtube.com/watch?v=NXba8Nl1Y7Q
__________________
2014 and 2015 BD7 Black Series, Yokomo RPX ESC- Yokomo 4.5T Motor
Yokomo B-MAX4 III Factory Team Kit, Muchmore ESC- LRP 6.5T Motor
Mugen MBX7R Eco- 2200 KV Motor
Futaba 4PX
cyba888 is offline   Reply With Quote
Old 05-27-2013, 09:46 AM   #3771
Tech Elite
 
CristianTabush's Avatar
 
Join Date: Oct 2002
Location: Houston
Posts: 2,676
Trader Rating: 11 (100%+)
Default

The length of your upper links. Run the shortest links available.
__________________
REFLEX RACING/ RSD/ GIZMO RACING USA/ HOBBYWING/ AXON/ QTEQ/ TEAM PRIME
CristianTabush is offline   Reply With Quote
Old 05-27-2013, 10:24 AM   #3772
Tech Fanatic
 
cyba888's Avatar
 
Join Date: Jan 2004
Location: Taipei
Posts: 988
Default

You mean remove all the shims under the camber links?
__________________
2014 and 2015 BD7 Black Series, Yokomo RPX ESC- Yokomo 4.5T Motor
Yokomo B-MAX4 III Factory Team Kit, Muchmore ESC- LRP 6.5T Motor
Mugen MBX7R Eco- 2200 KV Motor
Futaba 4PX
cyba888 is offline   Reply With Quote
Old 05-27-2013, 10:27 AM   #3773
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,526
Default

Quote:
Originally Posted by Barry_Hughes View Post
I wanted to try thinner bars but only had thicker ones for the rear, no-one else running the T4 had any thinner, so decided to remove it completely.
Funny though at Eastbourne the times improved considerably

Normally like you I always run roll bars.
At Eastbourne i went thinner on front roll bar, 1.3mm, but left the rear at 1.2mm (my default is 1.3mm at the rear) for my fastest laps
__________________
Xray T4'16, T4'14 (Wet Car)
Xray X12 2016
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RD Disco
Skiddins is offline   Reply With Quote
Old 05-27-2013, 10:29 AM   #3774
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,526
Default

Quote:
Originally Posted by CristianTabush View Post
I agree that your oil is a bit thick. Which piston are you running? To get more steering I would start by adding 1mm of of shims to your steering rack for a total of 2mm. After that, go to the short camber links front and rear. Finally shorten your wheelbase in the front and rear of the car by 1mm (bring the front arms back and the rear arms forward).

Sound familiar Damian?
Hmm, there is something familiar about it

Have you found the extra shims on ackerman help through slower corners, or just in general?
__________________
Xray T4'16, T4'14 (Wet Car)
Xray X12 2016
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RD Disco
Skiddins is offline   Reply With Quote
Old 05-27-2013, 10:40 AM   #3775
Tech Master
 
edhchoe's Avatar
 
Join Date: Jul 2004
Location: vancouver, wa, usa
Posts: 1,509
Trader Rating: 41 (100%+)
Default

Quote:
Originally Posted by Barry_Hughes View Post
Why do you refuse to put thicker oil in the rear diff?

If you look on Xray's own forum the top drivers all run with thicker oil.

I run on carpet & ashpalt, when I first had my T4 I ran with kit oil in the rear diff changed it to 2000 and would NEVER go back to 700, the car is so much better with the thicker oil.

Never ever say no to any change advised, try it, if you don't like the difference it makes go back, but it is always worth trying something
My reasoning is... Thicker oil will give more even power to both rear wheels upon acceleration and make the rear end loose. Thinner diff oil will give more power to the wheel with less grip and the rear end will have less contribution than the front end upon acceleration which will make the car more stable coming out of a turn.
If my problem is understeering I would change my diff oil to thicker one.
edhchoe is offline   Reply With Quote
Old 05-27-2013, 10:42 AM   #3776
Tech Fanatic
 
erchn's Avatar
 
Join Date: Aug 2010
Location: Union City, CA
Posts: 779
Trader Rating: 7 (100%+)
Default

Quote:
Originally Posted by Skiddins View Post
Interesting. I have thinner roll bars in case needed, but I never take them off completely as when I used to do that (a few years ago now) it felt good and did increase rear grip, my lap times suffered as it seemed to be worse on parts of the tracks with changes in direction.
There was always something else that could be changed to give me a better result.
I have never removed them since

Skiddins
I had great luck with no rear bar and a very light front bar (thanks Paul L. for the loaner) at the Reedy Race this past weekend. The car was very easy to drive and felt really consistent corner to corner. The key was a relatively stiff set of springs from RSD. My setup is here.
__________________
RCAmerica ; Team Powers USA ; Reflex Racing ; RC≥ RC Crew Chief ; Bezerk RC
erchn is offline   Reply With Quote
Old 05-27-2013, 10:43 AM   #3777
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,526
Default

Quote:
Originally Posted by cyba888 View Post
You mean remove all the shims under the camber links?
No, they mean the hole in the upper clamps that the link screws into.
Use hole 1, not 2 or 3.
If you look at a proper Xray setup sheet you'll see what I mean.

Skiddins
__________________
Xray T4'16, T4'14 (Wet Car)
Xray X12 2016
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RD Disco
Skiddins is offline   Reply With Quote
Old 05-27-2013, 11:00 AM   #3778
Tech Fanatic
 
cyba888's Avatar
 
Join Date: Jan 2004
Location: Taipei
Posts: 988
Default

got it thanks
__________________
2014 and 2015 BD7 Black Series, Yokomo RPX ESC- Yokomo 4.5T Motor
Yokomo B-MAX4 III Factory Team Kit, Muchmore ESC- LRP 6.5T Motor
Mugen MBX7R Eco- 2200 KV Motor
Futaba 4PX
cyba888 is offline   Reply With Quote
Old 05-27-2013, 11:01 AM   #3779
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,526
Default

Quote:
Originally Posted by erchn View Post
I had great luck with no rear bar and a very light front bar (thanks Paul L. for the loaner) at the Reedy Race this past weekend. The car was very easy to drive and felt really consistent corner to corner. The key was a relatively stiff set of springs from RSD. My setup is here.
Why such a high rear link (compared with the front)?

Did you try any slightly softer sprtings like the RSD Silver's or Grren's?
What did you think?
__________________
Xray T4'16, T4'14 (Wet Car)
Xray X12 2016
Xray X1'16
wlrc.co.uk (West London Racing Centre)
RD Disco
Skiddins is offline   Reply With Quote
Old 05-27-2013, 11:01 AM   #3780
Tech Master
 
edhchoe's Avatar
 
Join Date: Jul 2004
Location: vancouver, wa, usa
Posts: 1,509
Trader Rating: 41 (100%+)
Default

edhchoe is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Xray T3 2012 rasta_man Electric On-Road 4220 11-09-2016 02:45 PM
RC10B4/T4 Forum DerekL Electric Off-Road 14331 01-01-2016 03:18 PM
****HUGE AE T4 TRUCK TIRE SALE *** CRCDUDE R/C Items: For Sale/Trade 32 08-23-2010 09:55 AM


Tags
xray t4


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 10:59 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net

SEO by vBSEO 3.5.0