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Author Topic:   3 link w/swing arm
i-stock76
Dirt Newbie

Total posts: 4
posted August 17, 2005 09:27 AM  
I recently ( 3 races ) started racing a modified. My car has swing arm on lr w/200lb spring & 93 shock. Swing arm in next to top hole. Adjustable j-bar is 6'' from frame & mounted in the next to bottom hole on pinion. RR spring is 175 mounted on top of rear end, also w/93 shock. Pull bar is 22'' center to center w/800 lb spring. RR trailing arm is 13 1/4'' center to center in bottom hole on frame brkt. LF is 800lb w/753. RF is 950 w/75. 59% rear weight, 45lbs lr. Problem: car seems good on tacky track, but no side bite & loose off on dry slick. Any & all advise is greatly appreciated. Marty

dogwalker
Dirt Full Roller

Total posts: 65
posted August 17, 2005 09:40 AM  
My 2 cents:

For dry slick, move the right rear facing bar up one or two holes (to flat position) and lower panhard bar on rear end. If the p-hard/j-bar is in the bottom hole on the pinion/rear end, you may want to move it up one hole on the chassis end to gain angle. Should help get more left bite coming off the corner and give you more side bite.


psycho47
Dirt Full Roller

Total posts: 48
posted August 17, 2005 09:59 AM  
I had some of the same problems with my car running the same type of setup. I would think your left rear spring is too soft. I have run a 250 and a 300 on the left rear, with the equivalent rate being 175 to 200 depending on the length of your swingarm and where the spring is mounted.

i-stock76
Dirt Newbie

Total posts: 4
posted August 17, 2005 10:05 AM  
Spring is on slider on top of swing arm. Thanks for reply.

x13jc
Dirt Freak

Total posts: 390
posted August 17, 2005 10:29 AM  
What about the shocks I'm running ? Do I possibly need to do something different there?

x13jc
Dirt Freak

Total posts: 390
posted August 17, 2005 06:52 PM  
as far as the shocks go, I'll add my 2 cents!!

I would put straight valve shocks on it for now. 75's front and 93 or 94's rear. Shocks are used for fine tuning and won't fix a big problem. So for right now don't worry about shocks until you get the car handling pretty close to how you want it and then adjust the valvings to make small changes.JMO!!

i-stock76
Dirt Newbie

Total posts: 4
posted August 18, 2005 06:33 AM  
I appreciate all the replys. Think I,ll put 250# spring on lr & 700# on lf & 800# on rf. Once again thanks. Marty

x13jc
Dirt Freak

Total posts: 390
posted August 22, 2005 07:15 PM  
what did you find out this weekend?

curious.

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