Like Tree2Likes

Xray T3 2011

Old 12-07-2011, 02:48 PM
  #3781  
Tech Elite
iTrader: (85)
 
Midnight's Avatar
 
Join Date: Feb 2003
Location: Edmond. Oklahoma
Posts: 2,066
Trader Rating: 85 (100%+)
Default

Originally Posted by Johnny Wishbone View Post
1380 g.
Dang I added 2 sticks of weight and I'm still at 1139. My scales must be off.
Midnight is offline  
Old 12-07-2011, 03:21 PM
  #3782  
Tech Elite
iTrader: (85)
 
Midnight's Avatar
 
Join Date: Feb 2003
Location: Edmond. Oklahoma
Posts: 2,066
Trader Rating: 85 (100%+)
Default

Were r u guys putting ur weight?
Midnight is offline  
Old 12-07-2011, 03:28 PM
  #3783  
Tech Elite
 
morgoth's Avatar
 
Join Date: May 2010
Location: Belgium
Posts: 2,917
Default

I have a question for the guys who did the servo mod. How does it compare to adding expo on your steering channel?
I have about 15% expo on my steering channel to smooth the steering a little. I wanted to shim my link straight, but unfortunately it's hitting the topdeck, even with a 1mm shim.

I don't feel like drilling my chassis for the servomod but if it's really worth it...
morgoth is offline  
Old 12-07-2011, 03:39 PM
  #3784  
Tech Master
iTrader: (1)
 
samnelso's Avatar
 
Join Date: Aug 2011
Location: Fitchburg, MA
Posts: 1,751
Trader Rating: 1 (100%+)
Default

Originally Posted by Sith Lord View Post
I'm about to do this mod too, just by drilling the arm. So, you went back to original '11 centre link? How long is your link from servo to arm? Total length or middle of hole to middle of hole??
Yes, I went back to the original '11 orange center link. I'll have to measure the drag link (link from the servo saver to the steering pivot) and probably won't be able to do that until tomorrow. But, for now I'm estimating that there is about 10mm of turnbuckle exposed between the ball ends.
samnelso is offline  
Old 12-07-2011, 03:51 PM
  #3785  
Tech Master
iTrader: (1)
 
samnelso's Avatar
 
Join Date: Aug 2011
Location: Fitchburg, MA
Posts: 1,751
Trader Rating: 1 (100%+)
Default

.
samnelso is offline  
Old 12-07-2011, 03:54 PM
  #3786  
Tech Master
iTrader: (1)
 
samnelso's Avatar
 
Join Date: Aug 2011
Location: Fitchburg, MA
Posts: 1,751
Trader Rating: 1 (100%+)
Default

Originally Posted by morgoth View Post
I have a question for the guys who did the servo mod. How does it compare to adding expo on your steering channel?
I have about 15% expo on my steering channel to smooth the steering a little. I wanted to shim my link straight, but unfortunately it's hitting the topdeck, even with a 1mm shim.

I don't feel like drilling my chassis for the servomod but if it's really worth it...
Granted, I got a new chassis, rotated the servo, and did the steering mod all at once, but I can tell you that my steering feel is much much better. I was running ~-15% expo (less aggressive - which is +15% on some radios) depending on the day and now i'm -60%. The feel between the steering mod and expo are different. Expo can help smooth out you inputs. The steering mod (along with the other changes I've made) makes the car have a more direct steering feel. Before it felt like there was a buffer between me and the car, where the car did not necessarily respond precisely to my inputs. Now the car predictably does what my inputs tell it to do. It's a very cause and effect feel now.
samnelso is offline  
Old 12-07-2011, 10:09 PM
  #3787  
Tech Elite
 
morgoth's Avatar
 
Join Date: May 2010
Location: Belgium
Posts: 2,917
Default

Thanks for your input. Did it also decrease your laptimes? Or was is just a better feeling?
I think I drive the car pretty well now except my car had too much steering mid corner (rear comes out in mid corner) and my car is a bit nervous. It responds very quickly to input. I think it overresponds. I like a lot of steering on my cars, but the rear should be more planted.
morgoth is offline  
Old 12-08-2011, 03:06 AM
  #3788  
Tech Master
iTrader: (21)
 
Sith Lord's Avatar
 
Join Date: Dec 2007
Location: Canberra, ACT, Australia
Posts: 1,405
Trader Rating: 21 (100%+)
Default

Originally Posted by samnelso View Post
Yes, I went back to the original '11 orange center link. I'll have to measure the drag link (link from the servo saver to the steering pivot) and probably won't be able to do that until tomorrow. But, for now I'm estimating that there is about 10mm of turnbuckle exposed between the ball ends.
Thanks for that. So I won't need to buy a different length turnbuckle or new ball ends?
Sith Lord is offline  
Old 12-08-2011, 05:19 AM
  #3789  
Tech Master
iTrader: (19)
 
Meradin's Avatar
 
Join Date: Mar 2011
Posts: 1,309
Trader Rating: 19 (100%+)
Default

Originally Posted by Sith Lord View Post
Thanks for that. So I won't need to buy a different length turnbuckle or new ball ends?
I did the servo mod and the only thing I went into my parts bin for was a ball with a longer threaded shaft as the ball on the servo was a little short.
Meradin is offline  
Old 12-08-2011, 06:42 AM
  #3790  
Tech Elite
iTrader: (120)
 
Potoczak's Avatar
 
Join Date: Oct 2009
Location: PA
Posts: 3,702
Trader Rating: 120 (100%+)
Default

Originally Posted by Midnight View Post
Dang I added 2 sticks of weight and I'm still at 1139. My scales must be off.
Are you weighing the car with body on race ready?? Normally you want to put some weights down the middle under the belt. Also you can also put weight on the outsides of the chassis if you need to balance the car left to right.
Potoczak is offline  
Old 12-08-2011, 08:17 AM
  #3791  
Tech Elite
iTrader: (15)
 
M-Technic's Avatar
 
Join Date: Sep 2007
Location: Palm Beach, FL
Posts: 2,562
Trader Rating: 15 (100%+)
Default

Originally Posted by Midnight View Post
Dang I added 2 sticks of weight and I'm still at 1139. My scales must be off.
That's with a body, battery, etc.? Ready to go? If so, yes, your scale must be off.

Where I put the weight depends on where I need it for balance. Right now the weight I have added is on the electronics side. If your car is already balanced you can put it down the middle under the belt, as suggested above.
M-Technic is offline  
Old 12-08-2011, 10:04 PM
  #3792  
Tech Master
iTrader: (19)
 
Meradin's Avatar
 
Join Date: Mar 2011
Posts: 1,309
Trader Rating: 19 (100%+)
Default

Here is a question for those of you with stock steering setups and modified (2012 style) setups.

How are your steering endpoints set? For example, I messed around with my servo position, subtrim, endpoints, etc... but I cannot get an even throw side to side. I have to have a huge endpoint spred. Somewhere along the lines of 20 points.

I am not the only one at our track to notice this. A very experienced racer test drove my car as he is looking to get an xray and he gave it back to me saying that the car doesn't steer the same right to left.

We put it up on the setup blocks as I though maybe something had shifted but both right and left said 32 degrees on my rack.

Even with the subtrim at zero, arm straight up and down, I still had about 15 points difference from right to left. This tells me, in my limited experience that it requires a longer travel one way to get the same end point.

This seems very odd to me as the rack is centered (verified) and we are going to the same degrees on the steering gauge both ways.

Where is this difference coming from? The 2012 suffers this as well. Do those of yu with stock setups have this trouble?

We looked at a fellow racers car and he has about 60 points of subtrim to get his arm straight up and down and the his endpoints are off about 30 points right to left as well. (80 one way and 110 the other)
Meradin is offline  
Old 12-09-2011, 01:48 AM
  #3793  
Tech Regular
 
Join Date: Jun 2011
Posts: 290
Default

Originally Posted by Mera'din View Post
Here is a question for those of you with stock steering setups and modified (2012 style) setups.

How are your steering endpoints set? For example, I messed around with my servo position, subtrim, endpoints, etc... but I cannot get an even throw side to side. I have to have a huge endpoint spred. Somewhere along the lines of 20 points.

I am not the only one at our track to notice this. A very experienced racer test drove my car as he is looking to get an xray and he gave it back to me saying that the car doesn't steer the same right to left.

We put it up on the setup blocks as I though maybe something had shifted but both right and left said 32 degrees on my rack.

Even with the subtrim at zero, arm straight up and down, I still had about 15 points difference from right to left. This tells me, in my limited experience that it requires a longer travel one way to get the same end point.

This seems very odd to me as the rack is centered (verified) and we are going to the same degrees on the steering gauge both ways.

Where is this difference coming from? The 2012 suffers this as well. Do those of yu with stock setups have this trouble?

We looked at a fellow racers car and he has about 60 points of subtrim to get his arm straight up and down and the his endpoints are off about 30 points right to left as well. (80 one way and 110 the other)
Go back to basics, remove the servo saver and set the radio trim to centre and 100% throw, put the servo saver back on with the ball as near to 12 O'clock as poss, then set the l/r trim so that the ball is spot on. Measure your track rods and get them both exactly the same length. Connect the steering link and adjust that so that the wheels look straight. Steer right on the radio, adjust the servo end point so the servo just starts to hum, knock off 1%. Do the same on the left, both end points should be within a few%.

Put the car on the track and push the car forwards (no pinion on motor) with full steering right and note turning circle, do the same left, both should be about the same.

If they are not start to look for a machanical reason.
rear toe equal l/r.
front steering equal l/r
chamber and castor equal l/r
friction in l/r drive train, CVJ's, bearings, rubbing wheel.

With servo set top dead centre the should be equal steering and speed of steering, trims and end points are used to fine tune not to overcome car set up irregularities.

Once the car is equal in the "push test" connect the motor and try again, at slow speed it should give the same result, at high speed any noticable differences will be down to tweak, tyres or unequal balance somewhere.

Both my T3's are spot on.

Bb
bucketboy is offline  
Old 12-09-2011, 02:02 AM
  #3794  
Tech Elite
 
Skiddins's Avatar
 
Join Date: Feb 2006
Location: Windsor, UK
Posts: 4,914
Default

Originally Posted by Mera'din View Post
Here is a question for those of you with stock steering setups and modified (2012 style) setups.

How are your steering endpoints set? For example, I messed around with my servo position, subtrim, endpoints, etc... but I cannot get an even throw side to side. I have to have a huge endpoint spred. Somewhere along the lines of 20 points.

I am not the only one at our track to notice this. A very experienced racer test drove my car as he is looking to get an xray and he gave it back to me saying that the car doesn't steer the same right to left.

We put it up on the setup blocks as I though maybe something had shifted but both right and left said 32 degrees on my rack.

Even with the subtrim at zero, arm straight up and down, I still had about 15 points difference from right to left. This tells me, in my limited experience that it requires a longer travel one way to get the same end point.

This seems very odd to me as the rack is centered (verified) and we are going to the same degrees on the steering gauge both ways.

Where is this difference coming from? The 2012 suffers this as well. Do those of yu with stock setups have this trouble?

We looked at a fellow racers car and he has about 60 points of subtrim to get his arm straight up and down and the his endpoints are off about 30 points right to left as well. (80 one way and 110 the other)
Take some photo's of the steering system of your car so we can see what you've done.

I have changed my T3'11 to the '12 setup and the steering is only a few percentage points different in either direction.

Skiddins
Skiddins is online now  
Old 12-09-2011, 02:22 AM
  #3795  
Tech Champion
iTrader: (34)
 
CraigM's Avatar
 
Join Date: Mar 2007
Location: Sydney, Australia
Posts: 7,009
Trader Rating: 34 (100%+)
Default



1. Set the trim at zero
2. Position the servo saver on the servo as close to a 90 degree angle WITH THE STEERING LINK as you can get
3. Adjust the subtrim until the angle IS 90 deg from servo horn to steering link
4. Adjust the link length so that the steering is centered
5. Set EPAs

I know the '12 manual says to put the servo horn at 90 degrees to the servo but it's wrong, set it this way and you won't have a drastic difference between left and right
CraigM is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2021 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.