Loose rear????
#1
Loose rear????
I have a mongoose rc with a TZ18 motor....every time i nail the throttle the car spins out.....comming down the straight the rear ends just jumps around...the car is stock with the stock set-up....i need more control and stability in the rear.....ANY SUGGESTIONS????
#2
Sounds like something must me binding so bad.
Check the hinge pins and front/rear downstops, rear toes, shock shaft length and spring tensions.
Check the hinge pins and front/rear downstops, rear toes, shock shaft length and spring tensions.
#3
Tech Elite
iTrader: (17)
With an 18TZ I wouldnt be suprised. That thing has gobs of torque compared to a .12.
Welcome to the world of power , try to get on throttle smooth , like take a good 1.5 seconds to go full throttle and see how it does. Youll find the smooth throttle action will probably calm your overpowered touring car.
You probably also need to loosen the shocks in the rear , lower the rear so the car is equal ride height with the front or try a softer spring.
This will all get the rear to stick more. Good luck.
Welcome to the world of power , try to get on throttle smooth , like take a good 1.5 seconds to go full throttle and see how it does. Youll find the smooth throttle action will probably calm your overpowered touring car.
You probably also need to loosen the shocks in the rear , lower the rear so the car is equal ride height with the front or try a softer spring.
This will all get the rear to stick more. Good luck.
#7
Tech Apprentice
iTrader: (3)
Change diff Oil to something thicker than the 30000 diff oil with the stock Kit.
Try 50000 or 60000 this will help lock the diffs.
Harden the rear Springs. Put thicker oil in the rear and front.
Set the Down stops to only 3mm off the ground.Be percise.
Problem is your car is Torqueing when punching the Throttle.
The lighter side will lose torque and shift the power to the heaver side and then you lose control.
Also keep the ride hieght low like 4mm.
This is how I run Outlaw Engines in the Mongoose.
Try 50000 or 60000 this will help lock the diffs.
Harden the rear Springs. Put thicker oil in the rear and front.
Set the Down stops to only 3mm off the ground.Be percise.
Problem is your car is Torqueing when punching the Throttle.
The lighter side will lose torque and shift the power to the heaver side and then you lose control.
Also keep the ride hieght low like 4mm.
This is how I run Outlaw Engines in the Mongoose.
#8
If it spins on throttle input, i would rather go down in rear differential viscosity.
Last edited by Tommy Bergfeldt; 06-24-2006 at 04:19 PM.
#9
Also make sure that none of your belts are worn out or missing teeth because this can lead to the car spinning out.
#12
Tech Apprentice
iTrader: (3)
But they are right in saying to check Toe-in. VERY Important.
Slight difference in left and right and away the tail goes,especially with Low-end torque Engines.
Belt too. Check it, Belt might be slipping making the car sort of jerk.
Let us all know how it works out. This could be an interesting lesson for ALL.
Slight difference in left and right and away the tail goes,especially with Low-end torque Engines.
Belt too. Check it, Belt might be slipping making the car sort of jerk.
Let us all know how it works out. This could be an interesting lesson for ALL.
#13
I had a 18TZ in my G4, car was setup sweet for the sirio evo3 but as soon as the 18 went in it was very loose also, after improving by taking off rear sway bar and softer spring and oil in diff it still came down to throttle control on acceleration out of the corners. Our track is medium to low grip.
#14
Tech Apprentice
iTrader: (3)
Yes . with that much power going into the car's drive train, you will need to develope a certain technique in driving it. I did the same in the last race. Had to remove sway bars to stop the fish tailing coming out of turns. I was on a small track and with med. grip. Once I took off those sway bars, the car gripped like glue. By the way it, I was running a ZX12 engine.
#15
Tech Elite
iTrader: (19)
also to add to this, track width. check to see when the rear suspension is compressed, that the dog bones still can move in the cups. when the track width is 200mm and you increase toe in it may start to bind in the rear dog bones, this caused me problems in testing untill i checked setup on the bench that night. there is only a few mm before they start to bind. but do check it with the rear suspension fully compressed.
Last edited by Pattojnr; 06-25-2006 at 06:50 AM.