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Author Topic:   B-Mod setup
wwking572
Dirt Newbie

Total posts: 4
posted November 02, 2001 03:39 AM
I am building a b-mod for next season, i would like some opinions on spring rates since this class has a weight limit of 2800 lbs. any help?

jammin
Dirt Administrator

Total posts: 5060
posted November 03, 2001 08:22 PM UIN: 16262997
A lot of it will depend on the type of track you are running on, banking and speed.

jammin

spde
Dirt Full Roller

Total posts: 63
posted November 03, 2001 10:39 PM
we ran b's for 2 years, and had a little luck. when you build this with a 2800# limit you will not be able to dump all this weight on the rear end of the car, try filling the frame rails on each side and then set the car up with basic settings .
50-52% left
55-60% rear
100-150# of wedge
remember the higher the ballast the tighter it makes the car so you may have to ballance the weight out vertically also.
the big differnce i think is more in the motor remember you are pulling more weight so build the motor for it. i like to have the car shoot out of the corner, so we cam'd it to do so. if you can get off the turn faster you can roll through the turn easier. just my thoughts. the track will matter, also the tires, imca's or hoosiers? this will effect the setups a little. good luck

wfoondirt
Dirt Freak

Total posts: 242
posted November 05, 2001 08:59 AM
explai to me how a high cg makes a car tighter

spde
Dirt Full Roller

Total posts: 63
posted November 05, 2001 12:58 PM
i left one thing out. if you have your panbar in the same location and move the weight higher on the car, it will tighen the car up. this is dependant on the car having some roll in the first place. i'm not talking about changing the cg, just changing the weight around it. if the weight is higher than the cg then it will transfer that weight to help tighen the car up. i have ran weight high on the car and even ran it a foot off the ground behind the rear end. it does make a difference were the weight is you just have to mess with it a little. what im trying to say is basically when the car rolls, think about how the body rolls. if the weight is higher than the panhard bar, were would that weight transfer to? it sould transfer to the right rear, thus tighting up on entry. if the weight is lower on the car it would not transfer above the cg thus pushing the car into the corner, and loseing up the car. just my opinion let me know what you all think. ltr

[This message has been edited by spde (edited November 05, 2001).]

Racer77
Dirt Full Roller

Total posts: 32
posted November 05, 2001 02:01 PM
We have used this weight height to adjust the car. The lower the weight is in the back of the car, the more it seems to push the tires sideways.(looser) the higher the weight the more it rolls over onto the tires (tighter). This is on a car with stock suspension that other adjustments is not available.

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