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Author Topic:   can't keep it on all fours
flying3j
Dirt Roller

Total posts: 23
posted May 21, 2004 04:04 PM  
01 larry shaw car origianlly a 3-link and I converted it over to a 4 bar swing arm. I can't keep the front left tire on the ground. here's the info---- 52.3 left 56.7 rear not sure on cross. front springs are 650 lf and 750 rt 225's straight across the back. 13 1/2 and 15 1/2 length bars on the left,botton level and top @ about 19* uphill, shock in front and spring in back on birdcage, brake is not floated. 20" swingarm on right with spring on swingarm shock behind on birdcage brake is floated top bar is slightly down hill. new afco torque arm, fairly long running down hill.
any ideas thanks in advance

Ego Racing
Dirt Forum Champ
Total posts: 724
posted May 21, 2004 04:16 PM  
We had a car that all of a sudden started to carry the tire higher and higher comming out of the corner. We found the right front shock was bent and binding up causing the car to pivot over the tire. We thought it might be the right rear spring or shock so we replaced them both and still had the problem. Lesson Learned...... Check Everything!!!

nolimit92
Dirt Forum Racer

Total posts: 97
posted May 21, 2004 06:01 PM  
Usually you will not be able to keep the left front on the ground with a 4-bar suspention. The only way you can is by making a stop under the LR as to not let the rearend drop down as far. Another thing you can do is to change the left front upper a arm as to let it drop lower. You might level you left 4 bar links out a little more but in doing this the car will not have very much bit.

Mike

nolimit92
Dirt Forum Racer

Total posts: 97
posted May 21, 2004 06:19 PM  
Oh yea one thing you could do is bolt 25-50 pounds of lead directly on the LF. This might help some.

Mike
http://home.att.net/~nolimit92/wsb/html/view.cgi-home.html-.html

dirtsquirt
Dirt Full Roller

Total posts: 72
posted May 21, 2004 10:07 PM  
Yea, then fill your LF with calcium if that doesn't fix it????????


THE YEAR IS 2004

flying3j
Dirt Roller

Total posts: 23
posted May 22, 2004 01:36 AM  
i am running 35-40# bite in left rear and a short bar with about 4" of rake, changed front springs around a bit ready to race and g0t rained out-- bummer so I'd see if anybody else had an idea for next weekend?

boas51
Dirt Maniac

Total posts: 190
posted May 22, 2004 07:08 AM  
try less rake in the short bar, or go to a j-bar with the 4" of rake.
i assume the car isnt fast the way it is, or why would you be changing? i believe a car can be faster with all four tires on the ground, but there are a lot of fast cars lifting the lf.
is it pushing on exit? mid corner when you first pick up the throttle or later?

flying3j
Dirt Roller

Total posts: 23
posted May 22, 2004 09:09 AM  
the short bar gives the car so much side bite I hate to change it. the car is very fast the way it is-- but I can't keep the right front on a wheel, it blows the bead right off the tire. rules don't allow a beadlok in front. I am running basset d-hole wheels, nothing fancy

boas51
Dirt Maniac

Total posts: 190
posted May 29, 2004 07:31 PM  
try more right front camber

racer17j
Dirt Forum Champ
Total posts: 5390
posted May 30, 2004 08:48 AM  
If you are running the RR spring on the swingarm, the car sees the 225 as something closer to a 165 rate. This allows the car to really roll and carry the LF. Especially with the short L to L panhard bar.

flying3j
Dirt Roller

Total posts: 23
posted May 30, 2004 08:03 PM  
racer17j--
usually right @ 12#'s on hoosiers. Lost the first two tires and put 17#'s in the third and only made it 2 laps and blew it off the bead.
the track was a once a season track if that-- real heavy hp track.

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