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Author Topic:   J-bar question
showtime13
Dirt Full Roller

Total posts: 60
posted September 18, 2005 07:36 PM  
I have conflicting stories here. Maybe you guys can help? When a track is smooth/dry and slick do you normally raise the J-bar higher on the frame and when the track is tacky or has moderate bite in it do you lower the J-bar?

dogwalker
Dirt Full Roller

Total posts: 65
posted September 21, 2005 09:35 AM  
You can raise it on the frame end to create a "jacking" effect to give more sidebite or you can lower it on the pinion end to give more side bite. I would recommend getting the j-bar where you want it for dry slick, and just move it up on the pinion end for tacky. Too much rake can make 'em less consistent to drive, that's why I get it where I want it and only mess with the pinion end. JMO.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted September 21, 2005 11:19 AM  
If you need a little more sidebite in the slick I would lower it on the pinion that way you are lowering the roll cneter and putting more angle in it at the same time.

If its tacky you can prob get by raising the pinion end, but sometimes you have to move both. If its real rough you need to take angle out as well. Last weekend on a rough tacky track we went down 1" on the frame and up 2 holes on the pinion from our dry setting.

5tbone
Dirt Full Roller

Total posts: 58
posted September 21, 2005 08:28 PM  
This is were it pays to just play w/ the thing i have had conflicting stories too. if your local track conditions are the same or close every week then it's easy. Set the j-bar 6-7 inches up on the frame and 2nd hole up on the pinion. leave it for the feature. next week go racing come feature drop it 1-2 inches frame side see how it helps see how it hurts. Next week go racing w/ it back at 6-7 come feature time raise it 1-2 inches frame side see what that does. when you find out which way works for your driving style go that way until it quits being helpful then back it up till it's fast.

just my 2 cents

[This message has been edited by 5tbone (edited September 21, 2005).]

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