Losi xxx-4

Old 06-11-2007, 02:49 AM
  #1261  
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Can anyone tell me how to stop my car nose diving while jumping.
I had my xxx t set up perfect but I'm having trouble with my xxx 4, even if I move my battery pack back further it doesn't help

Any one got any ideas?
Thanks
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Old 06-11-2007, 05:32 AM
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Do not let off the throttle trigger in the middle of the jump, or before you leave the jump.

You know how to adjust the pitch of the car in the air right?
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Old 06-11-2007, 08:23 AM
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It sounds like you're slapping the rear of the chassis as you go over the jumps. Don't know how much driving you've done, but you generally can't hit jumps full throttle. With most cars you have to roll out of the throttle and back in at the jump, and with the XXX-4 it's really important. It's a low slung car with quite a bit of up travel. Not sure where you are on setup, but try raising the rear a little. I also use old shock o-rings as external limiters to control the up travel a little. With the XXX-4, I have to roll out of the throttle a little more on some jumps than with my T-4 or B-4. But the car has so much acceleration I can still clear everything I can with those cars.
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Old 06-11-2007, 01:47 PM
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Originally Posted by Alltapdout
Do not let off the throttle trigger in the middle of the jump, or before you leave the jump.

You know how to adjust the pitch of the car in the air right?

Thanks for the help guys.
How do you change the pitch of the car in the air?
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Old 06-11-2007, 02:01 PM
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throttle. more throttle makes the front lift up, less throttle will make the front drop.
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Old 06-11-2007, 02:40 PM
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Exactly!! The motor and driveline will cause the vehicle to pitch in the air. I would just recommend that you keep exactly the same throttle position with your finger as you leave the jump and keep it held till you hit the ground.. If you either leave the jump with not enough throttle, let go of the throttle in the air, or hit the brakes, all will make the car nose towards the dirt! I hope this helps. I have found that my xxx-4 is a flyer!!! With a little practice you should have no problem... Its all about control.
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Old 06-11-2007, 02:45 PM
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buggies float no matter what they are. my dark impact floats like its got wings. it will jump a mile off anything. and if you hit a jump crooked, turn the wheels down. if the buggy is leaning towards the right, turn right so the tires spin towards the ground. if the buggy leans left, turn them to the left. but if you simply hold the throttle, it should level itself out. you only need to turn in desperate angles.
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Old 06-11-2007, 09:23 PM
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Hey I have a question about the XXX-4, and this thread seemed like the best place to ask it. What's the best pinion gear for a 92-tooth spur gear for a short blue groove track?
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Old 06-11-2007, 10:08 PM
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Originally Posted by RCDuke
Hey I have a question about the XXX-4, and this thread seemed like the best place to ask it. What's the best pinion gear for a 92-tooth spur gear for a short blue groove track?
ive had good luck with the 18 tooth that is recommended.
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Old 06-12-2007, 02:53 AM
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ok, Thanks guys I will try that this weekend.
Heres a couple of pics
Attached Thumbnails Losi xxx-4-sany0012.jpg   Losi xxx-4-sany0005.jpg   Losi xxx-4-sany0013.jpg  
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Old 06-12-2007, 06:25 AM
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Good looking buggy kiwi!!!
By the way... Nice burnout too!
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Old 06-12-2007, 06:28 AM
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Originally Posted by RCDuke
Hey I have a question about the XXX-4, and this thread seemed like the best place to ask it. What's the best pinion gear for a 92-tooth spur gear for a short blue groove track?
What kinda motor are you running? I have a BL motor in mine and cannot really run anything bigger than a 15-16 tooth pinion.. Yours might be completely different? I'm not sure.
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Old 06-12-2007, 06:55 AM
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Originally Posted by RCDuke
Hey I have a question about the XXX-4, and this thread seemed like the best place to ask it. What's the best pinion gear for a 92-tooth spur gear for a short blue groove track?
What alltapdout said. It all depends on what motor you're running.
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Old 06-12-2007, 06:19 PM
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I'm running the Mamba Max brushless ESC with the 5700 kv motor.
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Old 06-12-2007, 07:27 PM
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Using a brushless setup you should have a little drag brake make sure you don't have too much. I have raced the -4 for a while. Most important ride hight, shock oil weight. And if you are going full throttle at 2/3 up ramp throttle back to about 2/3 to 1/2 throttle this should keep nose at about level at about highest point you should almost release throttle this should start nose down so when you hit the down slope of another ramp you car will be in correct angle at contact.
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