How to get the LR to suck up?

[Shep55]

I would first like to say I am new to the modified world. I have noticed a trend that the top 5 USRA B mods have their left rear tire suck way up on the car on exit. How do you get the car to do that? I am assuming it adds drive off. We run a 2 bar car is it possible to get our car to do it?

[JustAddDirt]

yes, raise your lr radius rod on the chassis.

But there are drawbacks as well, when doing that, you get a lot of loose roll steer, which may make the car loose on corner exit.

[Shep55]

What's the pros and cons so I fully understand?

[Shep55]

Also how much angle should we run on 16in bars?

[langdonracing48]

ive ran as high as 33 degrees on my left rear bar, but that was getting carried away. i run 24-28 usually, and make sure to get the bite up anywhere from 110-200 pounds depending on how slick the track is. right side i use to run at 12 degrees all the time, but ive been playing with running it flat lately. i think i like it flat better. also, most mods, especially older 3 link/2link cars are on a shorty panhard bar, not a j bar.

[rnoswal]

I am in my first year with what we call a Promod here in northwest Louisiana. The rear can be a metric 4 link, a leaf spring or a 3 link. Springs over the axles and no floating connections on the rear end. I have a 3 link, which has to have a solid pull bar by the way. This is a metric front clip with a 900 lb lr, 800 rf , 225 lr and 175 rr. Minimum weight for the car 2400. 52.5 left side and 55.5 rear. The car came with a short frame to diff bar about 15 degrees up to the frame and the left lower bar short and about 18 degree up from the left side under the axle to the frame mount. The right lower is a couple degrees up from under the axle.

I can see the cars that are kicking my butt are pulling the left tire under and lifting the body up under acceleration. The solid pull bar is 32 inches long and starts 10 inches above the axle center and angles down about 15 degrees. The left rear shock is a 10/90 rebound/comp and the right is 50/50. Oh yeah, the most interesting piece is the tires allowed, NASCAR pull offs. F40, F45 and we can use up to a ten inch wide rim. The track is banked pretty steep and of course is dirt. I have plenty of power but at no point can I feel the left rear trying to plant. I don't mean I am spinning the tire but can but want it to pull under and give me a lot more bite.

Any other info I can get you except what the other guys are running with their 3 link. That would be the best of course but I am not interested in buying information. Any advice with this?

Thanks

Russ

[washeduptoo]

Is the lr bar in the top hole on the frame? Is this an underslung car and does it have a drop in the underslung? How much rake in the panhard bar in inches do you have?