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Author Topic:   3 link set ups
Dirt Roller

Total posts: 12
posted June 24, 2004 11:09 PM  
Brand new at this style of racin. We have a harris chassis and need to learn more about set ups. So if I state something wrong please corret me. It is an 3 link with a torque link Spring type (afco). the car doesn't seem to roll over enough to get good bite on entry. Exit feels like ice. both lower bars are mounted in the upper holes. What will lowering them do? Torque link is in the upper hole on housing and upper hole near tranny. I'm not sure of spring rates on any corner of car. Next what should be weight on each wheel or cross weight just to get started. We have driven sprints and this is way different so far. Thanks for the help in advance. JD

Dirt Full Roller

Total posts: 47
posted June 25, 2004 09:24 AM  
As far as getting car to roll over try a 150 lb spring on the rr and run 200 on the lr.You can also move some of your weight over to right side and mount it high;try to keep it over the rr or in front of the axle.Check your front springs run softer spring on the rf about 50lb split.Sonds like your traling arms are already got as much angle as you can get more angle increases forward bite but there is a tradeoff it wont get in as good (lose in).On your 3rd link more angle the quicker it reacts but also the quicker it lets go.Weight % try 58% rear;48 to 50 cross;50 to 52 left.Just my thoughts lot of people on here smater than me if they will respond.GOOD LUCK WITH MODIFIED.Also check panhard bar or j-bar more angle left higher than right more it loads rr going in.

Dirt Roller

Total posts: 12
posted June 26, 2004 10:12 AM  
Thanks for the imput. Had someone send a Harris set up book and that was help. Thanks again

Dirt Forum Champ
Total posts: 755
posted June 26, 2004 03:13 PM  
If you can get the car on the scales and provide some weight %'s and the spring rates that would be great.

Basically repeating what hi-volt said:

Lowering your lower bars will produce less rollsteer/rearsteer in the middle of the corner making the car tighter. Putting more upward angle in them will loosen the car in the middle but provide better forward bite off the corners. It's all a compromise.

I'm not sure what your weights should be, might talk to your builder.

Work on fixing your entry problem first. You stated you didn't get good bite on entry and you thought the car wasn't rolling over, so I'll take that as the car is loose.

Here are some things to try:

-Lower the panhard/jbar/shorty bar. Lower panhards lower the rear roll center and that will tighten up your car.
-Increase cross weight.
-Stiffen LF spring.
-Stiffen RR spring.
-Move right rear wheel inward.
-Increase rear weight percentage.

I came from the sprint ranks as well, and these mods are a totally different beast as far as driving style goes.

Dirt Roller

Total posts: 12
posted June 26, 2004 04:54 PM  
Hey I will be scaling the car on sunday To find out where it sits and will post more info later. Thanks and will post again on monday.

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