Visit The Dirt Forum for More Information

Author Topic:   3-wheelin'
msnead
Dirt Forum Racer

Total posts: 77
posted September 04, 2005 10:42 PM  
I've read posts (and arguments) about lifting the left-front off the ground and, although it does look cool, I agree with those who say that 4-tires on the ground are better than 3.

With that said, our left-front wheel has lifted off the ground coming out of the turn ever since we bought our DirtWorks 9 car used. This past race, for example, I had drivers who were very impressed--one even said that it was so high off the ground, it looked like he could "drive under it"--but, we finished in 9th place and were too loose off of the 4th turn.

(This is an egg-shaped track. Turns 3 and 4 are the wider, sweeping turns--we carry a lot more speed off of 4 than 2. The car hiked up off of both turns.)

The track also had a lot of rubber down. We are always way loose when it gets like that.

How can I prevent the left-front from hiking up--or at least prevent it from hiking up so high? How can I tighten the car up when the track gets black? The car seemed to rock-over harder on the right-rear as well...

This is a 2004 DW9, 4-bar LR/Z-link RR. The left-rear is a coil-over eliminator mounted on the front of the bird-cage. The RR has the spring mounted on top of the rear. The j-bar is mounted even with the pinion, 7" above the frame...which is where DirtWorks says to start. Here are my weights:

LF: 521 RF: 462
LR: 654 RR: 601

LS: 52.5%
Rear: 56%
X: 49.8%
LR Bite: 53 lbs.

My thoughts were to take both rear springs off and figure out their rates and then put a stiffer right-rear spring in. Is this the right place to start? (Should I pull all 4 off and check them while I'm at it?)

Now that we've been through 1/2 of a season, I'm going to start chasing the setup. For the past 6 races, I've been concentrating on getting the driver seat time without making any drastic changes. I think it is time...

Krom, Flyin--you've never steered me wrong in the past...what are your opinions?

Thanks,

ms

Fastride 38
Dirt Maniac

Total posts: 125
posted September 05, 2005 07:46 AM  
I have found that putting a stiffer spring in the rr wont help much. I went fron a 150 spring to a 200 spring in the rr and still carried the left front 2 to 3 foot off the ground. What kind of angle are you running on the bars on the left rear? You might try moving the bottom bar down a hole or 2. This will keep it from getting up on the bar so fast and should keep the left front down some. Which in return should tighten the car coming off the corner. Cause it sounds like it's getting too much rear steer causing your loose off condition.

------------------
Rattler Race Chassis's, Shaking up the Competition!


COMING SOON TO A TRACK NEAR YOU!!

[This message has been edited by Fastride 38 (edited September 05, 2005).]

Seegy24
Dirt Newbie

Total posts: 1
posted September 05, 2005 12:44 PM  
Run a 200lbs srping on the right rear in front of the rearend on the birdcage with the coil over shock deal. I can almost gurantee that will keep the wheel down many people in my area have had some problem up to a 350 pound rr spring with it on top and wheel still lifts. other makes of cars can get by with it on top and i even know a few with dirtworks that get bye with it but most cant

GRTmod
Dirt Full Roller

Total posts: 33
posted September 05, 2005 01:05 PM  
get rid of the coil over on the left rear....i tried everthing to get rid of my left front problem and then i put an eliminater on.....problem gone. It is much easier to go threw traffic with that tire down.

msnead
Dirt Forum Racer

Total posts: 77
posted September 06, 2005 07:55 AM  
Since we have 1 race, maybe I'll leave the springs on and work on getting the bar angles right.

The problem is, I don't know which bars to change. Anyone have any more insight into exactly which bars I should mess with to prevent the car from lifting the left front 2' off the ground? (Remember, this is a 4/Z car.)

Thanks,

m

Fastride 38
Dirt Maniac

Total posts: 125
posted September 06, 2005 08:02 AM  
The bottom bar does the lift the top bar is a thrust bar. Move just the bottom bar on the lr down a hole. Watch the index of the birdcage though. Adjust the lenght if it throws the indexing off.

------------------
Rattler Race Chassis's, Shaking up the Competition!


COMING SOON TO A TRACK NEAR YOU!!

[This message has been edited by Fastride 38 (edited September 06, 2005).]

dirtracr
Dirt Maniac

Total posts: 199
posted September 06, 2005 11:17 AM  
we're having the same problem on our dw8..the left and right lowers are in the bottom holes...i run a 200 in front of axle with an eliminator on rr....we run about 100-120 of lr too..i'd also like to get the left front down and hook'er up too on the slick.

GRTmod
Dirt Full Roller

Total posts: 33
posted September 06, 2005 06:00 PM  
Bring the right rear bar up. INstead of pushing down on the frame it'll push it up, keeping the lf down.

flyin353
Dirt Full Roller

Total posts: 49
posted September 07, 2005 09:03 PM  
raising the RR lower bar will kill you on a dry track. Not only does it build roll steer, it puts drive angle in the RR and will loosen you up a bunch coming off.
JMO

msnead
Dirt Forum Racer

Total posts: 77
posted September 08, 2005 11:25 AM  
So... What do I do?

Can someone suggest a starting point?

GRTmod
Dirt Full Roller

Total posts: 33
posted September 08, 2005 05:51 PM  
For dry i have that bar down, but it works good in the heat when it's up. I would start with gettin rid of the coil-over, and if that doesnt work i found bringing the pullbar down on the rear end helped too.

Back to the Archives