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RC10B4/T4 Forum

Old 06-24-2009, 06:04 PM
  #8356  
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Originally Posted by Bubonic-X View Post
I cannot for the life me get the truck to clear a long double on my track. Whats more important spring rates or the right anti squat? Or Do I have a problem with how Im approaching the jump. IE power off at approach then blip it as it goes up the ramp. Im lost!
What are you running for motor, ESC, battery, and gearing?
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Old 06-24-2009, 07:29 PM
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sittin here thinkin, and forgive the ignorance, but how does 1 tell the difference between the 2 b4 chassis (the cheaper 1 u want and the more $$$ one you dont)?

R
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Old 06-24-2009, 07:35 PM
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Originally Posted by ultegrasti View Post
sittin here thinkin, and forgive the ignorance, but how does 1 tell the difference between the 2 b4 chassis (the cheaper 1 u want and the more $$$ one you dont)?

R
The graphite one has a lighter tint to it.
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Old 06-24-2009, 08:56 PM
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Originally Posted by binot View Post
Hi ya guys... Quick question on suspension..

My track got a couple Huge jumps but surface is rather smooth. I'm hearing lots of chassis slap off those jumps and it's kinda painful. So my questions are -

1) Will going a smaller hole piston with lighter oil increase the pack?

2) Does going up on the oil weightage and not changing my piston size achieve the same results?

Thanks guys
I would go smaller hole with the same oil. Also, you can build the shocks with more rebound (less oil bled out.) That should give more pack and slow the action down.

Are you getting chassis slap because you're over shooting the landings or is there just no or little landing ramp on these big jumps?
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Old 06-24-2009, 09:05 PM
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Originally Posted by rcman1993 View Post
The graphite one has a lighter tint to it.
And its stiffer so its a tad more weaker.
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Old 06-24-2009, 09:12 PM
  #8361  
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Originally Posted by porkey View Post
And its stiffer so its a tad more weaker.
There is also a significant weight difference between the two.
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Old 06-24-2009, 09:33 PM
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Originally Posted by SpraydbySprague View Post
There is also a significant weight difference between the two.
Yes they are, so then you will just have to add more lead.
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Old 06-25-2009, 07:03 AM
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Originally Posted by Jon Kerr View Post
I would go smaller hole with the same oil. Also, you can build the shocks with more rebound (less oil bled out.) That should give more pack and slow the action down.

Are you getting chassis slap because you're over shooting the landings or is there just no or little landing ramp on these big jumps?
Dosen't maintaining the same oil also cause an increase in damping if the hole were smaller? I would like to maintain the same damp rate but increase the pack.

There's no landing ramp... hence the huge height drop...
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Old 06-25-2009, 09:31 AM
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Yes, but that's the way I've always tested that adjustment. Start with the smaller pistons and same oil, then if you feel like it needs a lighter dampening, go to a lighter oil. The problem is there's no exact number for how much each piston size changes the dampening. So it's more of a feel thing.
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Old 06-25-2009, 03:34 PM
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Originally Posted by binot View Post
Dosen't maintaining the same oil also cause an increase in damping if the hole were smaller? I would like to maintain the same damp rate but increase the pack.

There's no landing ramp... hence the huge height drop...
If you change to a smaller piston size then you should go down in oil weight. If you don't, you will have heavier damping but the bigger effect will be slower rebound damping which will dramatically change the handling of your car. A way to drop oil weight/piston hole size to keep roughly the same static feel is to take both shocks off (front or rear) and change one shock over to the new piston. You can then guess at what oil to use, put the spring back on and compare how fast/slow the rebound is compared to the previous setup. Once you're close (probably 5wt lower) you can change over the other one and give it a try, the smaller hole/lighter oil should still resist bottoming a little better but it may also lose grip a little on small bumps if they are sharp. Odds are, if this is a big dropoff that the car bottoms really hard on you will never be able to get the car to land a lot better without seriously changing the rest of the car's handling characteristics so it may not be worth it to tune the car to handle one jump if it slows you down elsewhere on the track.
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Old 06-25-2009, 04:03 PM
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Originally Posted by SpraydbySprague View Post
What are you running for motor, ESC, battery, and gearing?
10.5 brushles orion platinum i think its 3800 I have not looked at the gearing in months just the standard gearing
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Old 06-25-2009, 04:49 PM
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Power sounds like the issue but first I would try playing with the gearing. If that doesn't work go to an 8.5 or 7.5 and that should do the trick.
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Old 06-25-2009, 07:56 PM
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Originally Posted by Bubonic-X View Post
10.5 brushles orion platinum i think its 3800 I have not looked at the gearing in months just the standard gearing
Check your gearing, you're probably geared too low. Run a 24-26/78, you'll be surprised how hard a 10.5 pulls a tall gear. Undergeared, higher turn brushless motors lose bottom end for some reason. They like load.
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Old 06-26-2009, 10:13 AM
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Default 8.5 gearing

is a fdr of 8 reasonably ok for a 8.5 BL?

just looked up the novak brushless gearing chart, but they are generally very conservative.

What ratio are you guys running, on novak 8.5's?
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Old 06-26-2009, 10:42 AM
  #8370  
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Anyone have their T4 set up for dirt oval. Whats your setup.
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