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SC10 4x4 Thread

Old 07-02-2012, 01:11 PM
  #25936  
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So this sounded good to me, but then I saw how much 4 oz of lead it is.......Holy cow, how did they ever get it to fit.
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Old 07-02-2012, 01:18 PM
  #25937  
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Originally Posted by Wildcat1971
What do you mean? I have seen home made videos. If you mean national events, then I dunno, a lot of races are done indoors these days because weather wont effect you. Nothing like planning an event for months and getting rained out.
yea national races. i might be going to the short course nationals over my way this year and thats outside. so...

http://www.rctech.net/forum/racing-f...c-madness.html
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Old 07-02-2012, 01:21 PM
  #25938  
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Originally Posted by Krio
The more weight up front the less it turns. It's counter intuitive, but think about inertia: if the back half of the truck is heavier it will generate more friction at that end, but it's not linear enough to counter the extra force needed to redirect that mass in a corner.
one would think that more weight up front would give more steering as its putting more weight on the front tires. i think of it this way, if you put the weight in he rear its gonna cause the rear end to swing more in the corners, like a pendulum effect, correct ?
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Old 07-02-2012, 01:23 PM
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I put 4.5oz in the frt of mine 2 weeks ago. I have only had it on the track once since then on a large outdoor track. It seemed more stable and jumped better.The weights will fit under the servo.
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Old 07-02-2012, 01:24 PM
  #25940  
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Originally Posted by Krio
The more weight up front the less it turns. It's counter intuitive, but think about inertia: if the back half of the truck is heavier it will generate more friction at that end, but it's not linear enough to counter the extra force needed to redirect that mass in a corner.
If I want my car to turn less, weight is not the first option where Im looking at
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Old 07-02-2012, 01:34 PM
  #25941  
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Originally Posted by murky123
If I want my car to turn less, weight is not the first option where Im looking at
Of course not, but it's not just about weight. It's about weight bias. Out of the box with a 550 motor and a stick pack the sc10 has a 42%/58% front/rear bias. This is in stark contrast to most 4wd rc cars. Most are much closer to 50/50. My 8th scale buggy is 48/52. This is the a big reason why saddle packs are used: moving the weight forward. There is only so much mass that can me moved on the sc10 and since weight is typically added anyways most people put it behind the front servo or in the front left corner if they are still running a stick pack.
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Old 07-02-2012, 02:08 PM
  #25942  
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Somebody remind me, didn't I write a manifesto about weight bias issues on the SC10 4x4 a few month back?

That's right, I did!

Originally Posted by CraigMBA
I tried that - it worked pretty dialed with 2 1/2 oz in the front. Once I went to 3 1/2oz, it was too much for the blues.
Next thing you know, all the cool kids are going to be doing it.

Originally Posted by Wild Cherry
craig , 2 1/4 oz on the ft end , no weight else where..
Thank you Dirt for validating my life.
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Old 07-02-2012, 02:10 PM
  #25943  
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lol, That is for a 550 right, I run a 540, is it still off by a lot? I mounted my esc far back on the left with a stick pack config and added weight to the rear 1oz....... so your saying , this is wrong, lol.
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Old 07-02-2012, 02:23 PM
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Originally Posted by Wildcat1971
lol, That is for a 550 right, I run a 540, is it still off by a lot? I mounted my esc far back on the left with a stick pack config and added weight to the rear 1oz....... so your saying , this is wrong, lol.
It's not wrong, so much as it's a tuning option of sorts.

If you want the chassis to have more transitional steering, moving weight to the back helps because it increases weight transfer by putting more weight in the rear to transfer.

If you want the chassis to have more steady state (like a sweeper) steering, putting more bias to the front helps.


Originally Posted by murky123
If I want my car to turn less, weight is not the first option where Im looking at
Before they outlawed moving ballast and spec'ed F/R weight bias, that's exactly how F1 engineers balanced the tire temps F/R. It's gone this season, which is one reason why they are having so much trouble with tires on one end or the other going off and destroying the balance.
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Old 07-02-2012, 02:36 PM
  #25945  
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I have my weight right in front of the saddles, also keeps it centered.
Has anyone else noticed tires wear faster on the RR and LF corners?
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Old 07-02-2012, 02:40 PM
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Originally Posted by Evil Genius jr.
I have my weight right in front of the saddles, also keeps it centered.
Has anyone else noticed tires wear faster on the RR and LF corners?
Are you driving on 2 wheels?
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Old 07-02-2012, 03:02 PM
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Only on the straights lol.
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Old 07-02-2012, 03:24 PM
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[QUOTE=CraigMBA;10929482]Somebody remind me, didn't I write a manifesto about weight bias issues on the SC10 4x4 a few month back?

That's right, I did!



remind me to read that.
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Old 07-02-2012, 05:26 PM
  #25949  
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Has anyone tried running Koyosho big bores on this truck I love them on my 2wheel and was thinking they might be good on a 4wheel
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Old 07-02-2012, 06:41 PM
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Originally Posted by umpy907
Has anyone tried running Koyosho big bores on this truck I love them on my 2wheel and was thinking they might be good on a 4wheel
The FT shocks are very good, dont think you will get better performance with the Kyosho big bores IMO.
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