272LikesSerpent Project 4-X
11-21-2016, 06:09 AM - Wikipost
|
|||
|
|||
|
04-15-2019, 12:41 PM
#767
I also hope to improve the electronics layout of my 4x - the weight is spread out more than my other TC's and it doesn't seem to be as nimble as it should be. I want to move the servo more inward and further back. That being said I had a good run last Friday setting a new consistency PR of 98.6% with the car as it is. But I just couldn't get around the corners quick enough to challenge the top racers lap times.
04-15-2019, 12:58 PM
#768
We cured this with harder springs on the rear roll damper and moving the wing forward. Elias time is quite close to the leaders. The qualifying didn’t show the speed. We tried a couple different layouts during morning practice and in the first qualifier. Elias ran the 2nd qualifier with the current layout, but I forgot to put the correct speedo settings in. 
Anyway the race showed the pace.
You can swap the location of the speedo and receiver to equal out the weight in the front and rear. This should move 80 grams forward.
Anyway the race showed the pace.
You can swap the location of the speedo and receiver to equal out the weight in the front and rear. This should move 80 grams forward.
04-16-2019, 10:26 PM
#769
Tech Initiate
Interesting layout. Isnt it too rear heavy? I am looking to test the speedo behind servo.
Another layout that I think about if I have short battery is, that you can move servo to other side, battery move back and use reciever and speedo to make correct balance.
But I dont know how it will be with weight distribution, I need to find some one with Corner weight system to borrow it and test.
Another layout that I think about if I have short battery is, that you can move servo to other side, battery move back and use reciever and speedo to make correct balance.
But I dont know how it will be with weight distribution, I need to find some one with Corner weight system to borrow it and test.
04-16-2019, 11:28 PM
#770
Interesting layout. Isnt it too rear heavy? I am looking to test the speedo behind servo.
Another layout that I think about if I have short battery is, that you can move servo to other side, battery move back and use reciever and speedo to make correct balance.
But I dont know how it will be with weight distribution, I need to find some one with Corner weight system to borrow it and test.
Another layout that I think about if I have short battery is, that you can move servo to other side, battery move back and use reciever and speedo to make correct balance.
But I dont know how it will be with weight distribution, I need to find some one with Corner weight system to borrow it and test.
I’m planning to cut a Servo plate to move the servo to the other side. The receiver would move forward right next to the servo and ESC right behind it. the Fan including the shroud could stay where it is right now.
A corner weight system sounds like a good idea until you realize what rabbit hole it is. replace the springs with something solid to remove the unknown factors like uneven springs. you can put the springs back inn to set the tweak.
04-16-2019, 11:32 PM
#771
Tech Initiate
On last race last weekend on black carpet I have big problem with grip. There was colder and I was sliding around. I go to thinner oil and softer springs and nothing helps. I try to switch upper rear arm bushing to have longer upper arm. At finals it was better, but I think that there were higher temperature, but the car has slow corner speed(maybe because it was soft?). Do you have any advices, what to do on lower grip, to have rear end of car more 'locked in'? Thanks
04-16-2019, 11:40 PM
#772
Tech Initiate
this Layout isn’t really rear heavy.
I’m planning to cut a Servo plate to move the servo to the other side. The receiver would move forward right next to the servo and ESC right behind it. the Fan including the shroud could stay where it is right now.
A corner weight system sounds like a good idea until you realize what rabbit hole it is. replace the springs with something solid to remove the unknown factors like uneven springs. you can put the springs back inn to set the tweak.
04-16-2019, 11:47 PM
#773
There are a couple things you can try.
Change the tire prep, like sauce 5min front and 10 minutes rear.
Use harder oil in the diff if it over steers mid to end of corner.
Use lighter oil in the diff if it oversteers beginning to mid corner.
Put a harder spring and lighter oil in the roll damper. for better switchbacks or harder oil for fast sweeping corners.
the heave damper hasn’t as much influence in the cornering.
move the wing forward to move the aero balance forward, this mostly helps in faster corners.
Change the tire prep, like sauce 5min front and 10 minutes rear.
Use harder oil in the diff if it over steers mid to end of corner.
Use lighter oil in the diff if it oversteers beginning to mid corner.
Put a harder spring and lighter oil in the roll damper. for better switchbacks or harder oil for fast sweeping corners.
the heave damper hasn’t as much influence in the cornering.
move the wing forward to move the aero balance forward, this mostly helps in faster corners.
04-17-2019, 04:20 AM
#774
Tech Initiate
Thank you, I will try it next time.
04-19-2019, 06:38 PM
#776
Roll Damper Craziness
My love/hate relationship with the 4x has shifted a bit more to the love side after I made a crazy change last night. I was just fed up with the roll dampers and removed the oil from both of them and raced the car the whole night like that. There were no ill handling effects and it was just easier to get good lap times. You can see in the video that I drove pretty safe after tapping one corner on the first lap but still managed to win the qualifier relatively comfortably. Black Camaro from P1 -
04-19-2019, 07:00 PM
#777
My love/hate relationship with the 4x has shifted a bit more to the love side after I made a crazy change last night. I was just fed up with the roll dampers and removed the oil from both of them and raced the car the whole night like that. There were no ill handling effects and it was just easier to get good lap times. You can see in the video that I drove pretty safe after tapping one corner on the first lap but still managed to win the qualifier relatively comfortably. Black Camaro from P1 - https://youtu.be/QKIYmQNkdXU
Your car seems to need a bit more rotation, at least in the beginning. Maybe your diff is to hard and heats up or try a one step harder roll spring in the rear. You should run like 2k in the roll damper and like 3-5k in the heave.
It probably worked due to the damping of the heave, which gets activated slightly under roll.
04-19-2019, 08:00 PM
#778
Nice run and good test.
Your car seems to need a bit more rotation, at least in the beginning. Maybe your diff is to hard and heats up or try a one step harder roll spring in the rear. You should run like 2k in the roll damper and like 3-5k in the heave.
It probably worked due to the damping of the heave, which gets activated slightly under roll.
04-19-2019, 11:13 PM
#779
Tech Adept
I think your comments are spot on and much appreciated! I have struggled with initial rotation since day one (I've always had the opposite problem with my other TC's so it's been a strange experience for me). I am running 8k in the diff which I do like on exit, I had 8k in the roll dampers previously and I currently have 3k in the rear heave, 2k in front the heave. And I agree that the heave shock does always activate at least a little no matter what...I was considering reducing droop to increase reliance on the heave damper so I can continue to run just lubricated roll dampers (so much easier to maintain). Anyway, I will try slightly heavier heave damping and slightly lighter diff fluid this Friday. I am really enjoying the car now and If I can get 2 more tenths I'll be ecstatic.
04-21-2019, 04:33 PM
#780
Pretty sure that without oil in roll dampers, you are back to a "standard" anti-roll bars effet.
Could be way more predictable, but way less efficient also. On the video, you car seems not to roll at all, what kind of springs are you using ?
Could be way more predictable, but way less efficient also. On the video, you car seems not to roll at all, what kind of springs are you using ?