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Author Topic:   short left rear control arm
gould
Dirt Forum Champ
Total posts: 730
posted July 06, 2005 06:41 PM  
I plugged the left rear and put a 5" shorter arm on it. its a 2 link car with a short pull bar. I also put a j bar on it instead of the long panhard bar. whats this thing gonna do when i stand on it and throw it in the corner.

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FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted July 06, 2005 09:59 PM  
Hopefully it will bow up and pass everybody but it doesn't always work like that LOL!!

You SHOULD see increased side bite with the j-bar and with the shorter bar on the LR you should feel more "instant" traction. The car will react faster when you get on the throttle.

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted July 06, 2005 10:13 PM  
Generally on a Harris the lower links are 21 inches heim to heim... you'll like this setup, just be ready for a throttle push. I've noticed that if you want to get a lot of roll steer you need to have your panhard or j bar mounted up high on the chassis to keep the back end of the car free enough to turn in the center.

FifteenCcrew
Dirt Roller

Total posts: 7
posted July 06, 2005 11:23 PM  
J-Bar will help you plant your Rear End better giving your more side bite and when you make your Either trailing arm shorter, it makes it re-act faster.

21 Heim to Heim? I beleive ours is 12" Heim center to Heim Center and I know of a few with 9" Heim to Heim Rear bars.

gould
Dirt Forum Champ
Total posts: 730
posted July 07, 2005 04:32 AM  
mines 15.75 on the left and 20 on the right. heim to heim.

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Xtreme12x
Dirt Forum Champ
Total posts: 874
posted July 07, 2005 09:07 AM  
Just be ready for a throttle push, it takes a different driving style to drive these setups... I am still having trouble adapting to the short panhard bar but you aren't running one of those, so I think you'll pick up quickly. I'd set your bar angles both at about 20 degree's uphill and go from there.

The mounts that come standard on the Harris chassis for the long 2 like make both arms around 21 inches heim to heim, which is what both of my cars are, and shortening up the left side trailing arm has been the best thing I could have done for both of them. The J bar will not so much react quicker, but will provide sidebite at a different time. The car should be a lot free-er into the corner, and then tighten up when you get back into the gas which some people have trouble getting ahold of behind the wheel.

gould
Dirt Forum Champ
Total posts: 730
posted July 07, 2005 10:31 AM  
im running 80 lbs of lr bite right now with the old set up, should i take some out?

doghouse racing4
Dirt Forum Racer

Total posts: 91
posted July 07, 2005 10:35 AM  
I shortened my lr 5" like you, struggled with it at first with a push in middle. What has fixed mine is putting the lr lower bar at 15* and RR at 5* up. Also I have continued to increase my LR bite and cross. LR at 140 lbs and cross at 54. alot of angle in my J-bar and trailing my RR about 1/2 to 3/4". Good luck....

gould
Dirt Forum Champ
Total posts: 730
posted July 09, 2005 10:12 PM  
the car was awesome, no throttle push, maybe even a touch loose. going to add more lr bite.

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dirttruck75
Dirt Roller

Total posts: 11
posted July 12, 2005 04:41 PM  
What was your cross at? what kind of angles where you running? I'm thinking of shortening the lr trailing arm on my 04 harris.

nyimcamod8t
Dirt Full Roller

Total posts: 67
posted July 12, 2005 04:54 PM  
i tried that on my 04 Harris with the short lr and long rr two link. Personnaly I didn't like it at all. Car just plain has more forward bite with the 4 link deals on it.

gould
Dirt Forum Champ
Total posts: 730
posted July 12, 2005 06:34 PM  
I'm also throwing around the idea of running both bars short. It should really get some forward bite, shouldn't it?

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5tbone
Dirt Full Roller

Total posts: 58
posted July 17, 2005 01:34 PM  
a friend of mine ran both short when he had trouble with the short LR he did very well w/it. this year he switched to 4-Z and is winning a lot also. As far as short LR if you have the issue with a throttle push just put more angle in the RR bar.

[This message has been edited by 5tbone (edited July 17, 2005).]

gould
Dirt Forum Champ
Total posts: 730
posted July 17, 2005 04:30 PM  
I moved both trailing arms up a hole and had some serious forward bite! Only problem was I had no brakes at the end of the straight away to set the car. Come to find out, my caliper was hitting the bar under throttle and would push the piston back into the caliper, when it was time to brake I had to pump the cr@p out of them. I will get it fixed before next week, I really like the forward bite I was getting.

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[This message has been edited by gould (edited July 17, 2005).]

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