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Author Topic:   4-bar need help on dryslick....
STICK01
Dirt Maniac

Total posts: 164
posted July 12, 2004 01:46 PM  
I know just like everyone else, but the car is really great on the top in the heat races using a small cushion but as the track goes away the only place i can get the car to hook up is on the cushion that is left. wondering about front spring rates or the dropping of them to help on the slick stuff. 750 LF and 700 RF car just does not "stick" the Rf to turn the car on the slick tracks like it does early. J-bar angle and "wedge" did seem to help a little this week but not enough.

LF 750 RF 700
LR 225 (behind) RR 200 (in front)

about 49 -51% cross
56+ rear
51-53 left
only about 60-80 lbs lr bite

Thx.

badfastjr
Dirt Maniac

Total posts: 193
posted July 12, 2004 02:59 PM  
had the same problem, softened the left rear sping at it fixed it. you could swap the two rear springs and it would probably be great.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted July 12, 2004 03:29 PM  
Check to make sure you have enough camber in your RF. As you come out of the corner you dont want it leaning out at the top because then you are only using less than half the tire to turn the car. Also try a 700 in the LF, if that helps go to 650. Also try more rear for traction when its dry.

Kromulous
Dirt Forum Champ
Total posts: 796
posted July 12, 2004 03:50 PM  
You might try a 5/3 (3 rebound) shock on the left rear for when it slicks off. Should make it steer more in and tighter off.

Lighter LR spring would help but you might loose some LR bite off and loose some acceleration.

STICK01
Dirt Maniac

Total posts: 164
posted July 12, 2004 06:25 PM  
good suggestions but i always felt that when i soften the LR spring it lost fwd bite?? I know that seems not to be right but that is what my A$$ felt...Kromulous - we have a specialty built 20/70 bilstein on the LR now.
we will probably try the front spring deal first and if we feel it needs more then swap rears, or if we get the chance to go play somewhere that my track points do not matter.

thx for the suggestions.

2nd2none
Dirt Forum Champ
Total posts: 755
posted July 12, 2004 11:38 PM  
rear percent would definitly help, we usually stay around 57-58% on 4bar cars, more as the track gets slick. Having the softer RF spring will make the car tighter going in and looser coming off.

The softer LR will help the car climb the bars quicker and your loose feeling maybe too much loose rollsteer as now the car is up on the bars a little earlier in the corner.

Kromulous
Dirt Forum Champ
Total posts: 796
posted July 13, 2004 07:46 AM  
2-7 Bilstien, that would do it. Gonna order me one of them too. Working on about the same problem you are.

I think i am going to try that light LR spring idea to. Never thought of that but hope it helps us.

We usually dont have any steering trouble, just FWD bite is low on the dry slick.

How much travel are you getting out of the RF shock?

STICK01
Dirt Maniac

Total posts: 164
posted July 13, 2004 10:11 AM  
about 3" on the tacky,blown off tracks and then when it gets slick like 1/2 way through the night, it keeps getting less and less...i think it is because the D-40 RF tire is not sticking the car in the corners...car is really good for 6-8 laps and then just wants to be floated in the corner and not "pushed"...

Gonna try that hard (A-40) Rf option this weekend if it gets slick again...as well as the springs in the front and rear...might as well see if it all works!!!

Chad
Dirt Freak

Total posts: 269
posted July 13, 2004 10:58 AM  
Your setup looks in the ballpark. I'd suggest working with your j-bar and pullbar. If you drop the j-bar on the pinion to below the pinion centerline and drop the pullbar (even consider adding a second mount to the left of the center frame mount along the driver's compartment). These changes make a huge difference when I'm wanting to hook up my 4-link. I assume you are running the LR upper link at 18-20 degrees with the LR lower at level. I don't need to move my bars to add forward bite, just by adjusting the j-bar and pullbar I'm able to get all the forward bite needed. This setup should allow you to turn in on the bottom, pick up the throttle, and pull them off the corner. Let me know if you have any other specific questions.

Kromulous
Dirt Forum Champ
Total posts: 796
posted July 13, 2004 11:54 AM  
What kind of downward angle and how far off center are you with your pull bar, Chad?

I assume when you referr to the 2nd mount for the pullbar i am imagining you are relocating the pull bar towards the left rear?

DElliott19
Dirt Roller

Total posts: 16
posted July 13, 2004 12:35 PM  
I am guessing that you are running eliminators on this. So sounds like you might have one binding up. Even the best you can bind will bind and cause a car to react different or inconsistent. Just another thought you might consider if you haven't cleaned them lately. Just an idea.

STICK01
Dirt Maniac

Total posts: 164
posted July 13, 2004 02:35 PM  
i tried the j-bar angle on the frame but was afraid that if i moved it down on the pinion it might start sawing into the driveshaft...

the pullbar is already outboard to the left...

2nd2none
Dirt Forum Champ
Total posts: 755
posted July 14, 2004 11:21 PM  
if your afraid of the J-bar hitting the driveshaft, flip it upside down and run it under the driveshaft. The car doesnt know how that J-bar is mounted all it knows is where it is on the frame and pinion.

Can also be done if the J-bar is hitting the pullbar.

[This message has been edited by 2nd2none (edited July 14, 2004).]

zeroracing
Dirt Forum Champ
Total posts: 1875
posted July 15, 2004 04:27 AM  
hey stick01 arent you running those voit sliders, i thought you were on here talking about them before. how much does one run roughly?
thanks
jason

STICK01
Dirt Maniac

Total posts: 164
posted July 15, 2004 08:33 AM  
yep i sent ya a pm on the pricing...

I have only taken mine off the car twice all year...just to check them. They are still as free as the day i put them on the car, i would not believe it if i did not see it and feel it for myself.

he and i are not seeing eye-to-eye lately but they are a very good product!!

STICK

imca22mbp
Dirt Newbie

Total posts: 4
posted July 15, 2004 05:35 PM  
Buy a pierce car and your problems will go away. Pierce says slicker the better. Hooks up so much, that if you have the car set up right you can lift the left front wheel all the way around the track, beleive me I know!!!!!

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