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Author Topic:   brake bias,no rf brake
darrellh
Member
posted November 03, 2003 06:32 PM
i run llm with no rf brake,wilwood balance bar,gm calipers on lf,& rear end,3 link rear.on tacky track car pushes going in under braking.fast competitor says i need more lf brake to sling the car sideways into corner.books say you need more rear brake on tacky track.further info 50% crossweight,j-bar in top hole on pinion mount,lt chassis mount 3" higher.1/4 mile track with @15 degree bank.


HERNDON
Member
posted November 04, 2003 12:25 AM
With that much angle in your J-bar you'll have to pick up on the gas way too early for your car to handle right. I'd try to lower the angle on the chassis. If I put that much angle in mine , I wouldn't be able to stay off the wall!!! Start off about even and see if that helps...


Wauge28
Member
posted November 04, 2003 03:55 PM
If you have to use your brakes to turn, you have an ill handling car. Fix the problem and you will be soooo much faster.

Try the panard bar like HERNDON said and then look at your cross. Not enough cross will make your car tight going in (that is if your entering the turn off the gas...opposite it you enter on the gas). Most people think that too much cross makes you tight...it does, but not on entry.

OK, with that said...to answer your question. Adding bia to the LF will do NOTHING. It will just skid the LF and get you caught if shut off valves are illegal at your track. The way to turn the car is to put the bias to the rear.

66jj
Member
posted November 04, 2003 04:18 PM
Hey guys I was wondering if on dirt, caster makes a big diff or not.

My exp is all pavement, but several times my car would be tight on entry at my #1 track(where I was perfect) and every time if stagger was good it was because we lost caster on the lf. I mean just a little I ran 1.5 and could feel, and hear the lf standing up, kinda, or just not working right and it would be under 1 degree. It got to the pt that if it felt that way I just added a little caster and wallla fixed.

so does caster play much on dirt?? I personally am thinking its not as important, knowing their is less traction etc. and using the rear trail arms, panhard adj. as comparison. on pavement we were moving 1/8-1 degree and on dirt you guys have your mounts in holes that are 2-3 inches apart.

thanks

chief4car
Member
posted November 04, 2003 07:18 PM
If you are running 3 wheet brakes and the car wont turn, you need to move some of the brake to the front. Not the rear.


tilley88
Member
posted November 04, 2003 08:39 PM
Check your rear calibers, they may be going bad. Check your toe-out, set it straight-up to a 1/4" out.


tilley88
Member
posted November 04, 2003 08:43 PM
BTW, if the track is real heavy, move bias to the rear. You can't turn with the front brakes locking up. I've always ran 3 wheel brakes. That'll change next year with my mod.


darrellh
Member
posted November 05, 2003 01:20 PM
tilly,next year you will change to all 4 brakes or rear only?.on my car,corner entry is better with rear brake but the rear end still stays tucked in behind car if track is hooked up.i want to throw the car hard into corner with a stab of the brakes & then nail gas but cant.if i stab brakes,car straightens out.could this be a result of chassis set-up,too much lr weight,or brakes?i think rear panhard bar low tightens car all the way through the corner & loosens entire corner if moved up high.


tilley88
Member
posted November 06, 2003 03:23 AM
I assume the track you race on has real tight corners, so here goes; Try these adjustments w/3 wheel brakes- increase rear brake %, increase rear stagger, take out a little wedge, add more offset to the RR, take out a lb. or two of air in your RF and/or your LR, add a lb. or two to your LF and/or your RR. Check for binds in your shock/spring combo, and make sure your LF spring is not out of the pocket. Again, check those rear calibers. Hope this helps.


darrellh
Member
posted November 06, 2003 10:55 AM
Tilley,thanks for advice & i will try your suggestions Saturday night but i still want to know about your comment that you are not gonna run 3 wheel brakes next year.what change are you gonna make?I see mods with both ft brakes.Is this a better deal on dry slick?


tilley88
Member
posted November 06, 2003 01:23 PM
Sorry about that. If I read the rules right, I MUST run 4-wheel brakes next year(but I'll have a shutoff). This will be my first year in a mod. I don't know if 4 wheel brakes are better than 3 wheel, since I've never run 4 wheel.


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