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Author Topic:   left rear unload???????
andykmod
Dirt Full Roller

Total posts: 40
posted August 04, 2002 07:11 PM
I run a swing arm rear suspension with 19 3/4 inch links front and rear, 300lb lr and 250lb rr with a short pinion mount panhard bar and usually run about 190 lbs bite. Front springs are 1250 rf 1150 lf. My problem is comming off the corners it feels like the left rear is losing bite if i don,t come off just right or running the bottom of the track. We tried split valve shocks on rf and lr and also stacked about 70 lbs of lead on the lr frame rail. The rear end is not hitting the underslung and the shocks are not running out of travel. Any ideas???????? Thanks

donslink
Dirt Roller

Total posts: 18
posted August 04, 2002 08:54 PM
Well Andy, I was talking to Chris the master set-up guyand he said he thinks you need a little more side bite HA,HA,HA

fast19
Dirt Roller

Total posts: 24
posted August 05, 2002 02:01 PM
SPRINGS?
I don't know of many mods sprung that heavy, especially upfront. Give us some more info, corner weights, cross or other setups you have tried. How did you get to such heavy front springs?
You will get the help you need if you keep trying!
19

dirtracer14
Dirt Freak

Total posts: 333
posted August 05, 2002 02:39 PM UIN: 23443678
The front dont look to heavy to me. We run 1100 lf and a 1450 rf but only 200 lr and 175 rr with a swingarm type car. I would look at the rear steer as it is coming out of the turns. We found that to be a big help coming off the turns! With the front springs i get 2 1/2" travel on the rf and 2" on lf. Are the shocks bottoming out on the lr or the slider?

[This message has been edited by dirtracer14 (edited August 05, 2002).]

andykmod
Dirt Full Roller

Total posts: 40
posted August 05, 2002 10:58 PM
Nope,the slider and shock are not over extending or bottoming out and the rear end is not hitting the under slung.I usually get about 2 to 2 1/2 inches of shock travel on the right front and about 2 1/2 to 3 on the rr car has 52% ls 59.5% tail 56.5% dia i usually run about 190 to 225 lbs of bite and have also tryed 300 lbs but could not turn the car. is it possible that i have to much bite that it holds the car on the rr of the corners? My chassis builder (Kosiski) tells me not to run more then 120lbs of bite and not to run a short panhard bar but i like the car better with the short bar on the dry-slick they usually run a 19in. j-bar. I run a 19in rear mount straight bar on the tacky stuff and it works great but can't get it to work on dry-slick. Also my rr tire is about 40deg hotter the my lr?????

andykmod
Dirt Full Roller

Total posts: 40
posted August 09, 2002 03:36 PM
Hey Jammin got any ideas on whats going on here?? Thanks

alkyholic
Dirt Roller

Total posts: 19
posted August 15, 2002 12:12 AM
what gear and trak size do u run? what type of pullbar do u run? how much pinion angle? spring placement?

jammin
Dirt Administrator

Total posts: 5060
posted August 15, 2002 07:34 AM UIN: 16262997
What kind of traction control device are you using? Pullbar, liftbar? Spring rate on the device?

jammin

[This message has been edited by jammin (edited August 15, 2002).]

andykmod
Dirt Full Roller

Total posts: 40
posted August 15, 2002 02:55 PM
I run a pull bar with a 1150 spring pre loaded about 1/4 in. 4.86 gear on our half mile. springs are on swing arms, 8 deg pinion angle

jammin
Dirt Administrator

Total posts: 5060
posted August 16, 2002 12:24 PM UIN: 16262997
If the spring is collapsing or bottoming out, it could cause this type of condition. I have experienced this myself. It will be fine until it compresses enough to become solid. Once it does that, you may lose traction. ?? But that sounds like an awefully heavy spring in the firts place.

jammin

Why Try
Dirt Newbie

Total posts: 1
posted August 31, 2002 02:14 PM
throw a 175lb spring in the bucket on the LR and a 95 shock on that same corner and see what that does for ya

[This message has been edited by Why Try (edited August 31, 2002).]

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