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Author Topic:   sixth coil
dan ferry
Dirt Maniac

Total posts: 183
posted April 28, 2005 08:20 PM  
what do you guys that run a lift bar use for a sixth coil?ive seen shock on top of rear end shock on lift bar and the fith and sixth coil do u need all of these?could you use a chain instead of the sixth coil is your using a shock on the bar and top of rear end? or is shock on top and 5th coil and chain enough? this is on a 4 bar car. could you use a 90/40 in place of 90/10 schock on top and use no shock on bar and us a chain in place of 6th coil? thanks tryin to get car on track cheapest to get it out and seat time then make it better.

wfoondirt
Dirt Forum Champ
Total posts: 505
posted April 29, 2005 07:29 AM  
5th coil and chain on the torque arm and a 90/10 on top of the rear end is quite popular.

zeroracing
Dirt Forum Champ
Total posts: 1875
posted April 29, 2005 07:45 AM  
Ok here is my advice.
The 6th coil vs. chain, start with the chain, if the car is too loose on entry then put on the 6th coil to tighten up the race car.
If your running a 5th coil you really need a shock on the arm, to help control the spring harmonics, if not then it is very easy to get the spring to start bouncing harmonically, which means your bite and pinoin angle will be kinda pulsating.
As far as 9010 vs some other shock, many late models run a shock on the arm that is very stiff on rebound to help control the brakes instead of a 9010. but with just the chain i would try to keep the 9010 on the car. if the car is too tight then you may try to remove the 9010 to help free it up on entry.
good luck,
jason

Ego Racing
Dirt Forum Champ
Total posts: 724
posted April 29, 2005 08:41 AM  
Many chassis MFG reccomend a 7-3 on the lift arm 7 compression to help catch the torque of the motor and a 3 to slow the drop on the brakes so it dosn't slam down and upset the car. We are running a 350lb spring on it. As for the 6th coil we run a 400lb spring and no top shock. We only use the 90/10 for a track that gets SLICK going into the corner.

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