Visit The Dirt Forum for More Information

Author Topic:   2 link setup?
21dirtracernw
Dirt Full Roller

Total posts: 29
posted May 17, 2004 09:07 AM  
We run a flexiflyer copy with a 2 link rearend. The track we run on is a high bank 3/8's
The car hooks up great on the staightaways and great in the turns when its tacky. The problem is when it dry out the rearend get lose and was wonder if I had the bar anble wrong.

setup is ..
750lf
850rf
200lr
175rr.
shocks.
77lf
76rf
94 across the back.
crosswieght is 52%
leftside is 53%
with 50# rear bite

bar angle is..
left flat
right 12degrees.
pullbar 23 degress.

hope someone out there has run across this
them selfs.
it drivng me nuts..


Ego Racing
Dirt Forum Champ
Total posts: 724
posted May 17, 2004 09:27 AM  
What type of panhard bar are you running?

nvracer
Dirt Maniac

Total posts: 127
posted May 17, 2004 09:33 AM  
Where are your spring locations on the rear?
Tire temps?
How is the sidebite in the middle? If it is lacking increase the angle in the Panhard or J-Bar.
Raising the LR bar will increase LR bite.
Could add some bite into the car as it dries out.

21dirtracernw
Dirt Full Roller

Total posts: 29
posted May 17, 2004 09:45 AM  
bite is not bad in the middle. long panhard bar.
springs are in front of axle..
anything else?

Chad
Dirt Freak

Total posts: 269
posted May 17, 2004 10:24 AM  
The first things I'd change for a slick track would be:
1) Put as much angle as possible in LR trailing arm
2) Run the RR trailing arm flat
3) You didn't mention your rear percentage, but consider adding some weight, start with 50 lbs in front of the fuel cell about half way up
4) Change your front shocks to easy up valving on the rebound
5) If the track is smooth, switch to a short panhard bar mounted to the left side of the pinion, or at least switch to a J-bar
6) If you can, move your pullbar to the left, this may require fabricating a new frame mount, keep the pullbar running parallel to the chassis centerline- when you move the frame mount over, you'll need to move the rearend mount over the same amount
7) Move your RR spring to behind the axle and consider changing to 150 lb spring

Your other springs and percentages look alright. Make sure you check your rear end alignment and make sure you're square- don't run long on the right side.

21dirtracernw
Dirt Full Roller

Total posts: 29
posted May 17, 2004 11:34 AM  
thanks you guys for the help..

mod70
unregistered Total posts: 29
posted May 17, 2004 01:06 PM           send a private message to 21dirtracernw   Edit/Delete Message   Reply w/QuoteBBBBBB
I agree with chad on everything but the RR control arm angle. If you start with it flat, when the car rolls over it will pull the RR forward, thus negating the right rear steer. I'd leave some down angle in it, at least 7 to 10 deg. You may also try going up to 80# to 100# rear split, I run mine at 80# on dry/slick.

21dirtracernw
Dirt Full Roller

Total posts: 29
posted May 17, 2004 05:21 PM  
ok got one other question for you guys, our track will start off kinda heavy and got more towards the dry side. Would this setup that chad was talk about work on a tacky track also?
I feel kinda dumb asking this but it would really help me with a base line setup.

thanks again for the help..

mod70
unregistered Total posts: 29
posted May 17, 2004 05:49 PM           send a private message to 21dirtracernw   Edit/Delete Message   Reply w/QuoteBBBBBB
If you like your original setup on the tacky track, than start with that. Come feature time I'd change front shocks, change RR shock to 95-3, angle LR control arm more (I'd put some angle in it to start with anyway)and slap on some rear weight. These are things that are easy and quick that you can do at the track. You might try this before you change RR spring to 150#. I run 200 & 175 in mine. If the track is flat, run 17 to 20 deg in J/straight bar, if it's high bank go down toward 10 deg. Let us know if any of this helps & good luck!

21dirtracernw
Dirt Full Roller

Total posts: 29
posted May 17, 2004 07:28 PM  
thanks again guys I will try this setup this weekend. And it is a high bank track.14 to 16 in the cormers and 6 on the straights.
I took a second of my time last weekend and it this works I will be right in there with the fast ones.
Again thanks for the help.

mod70
unregistered Total posts: 29
posted May 17, 2004 08:08 PM           send a private message to 21dirtracernw   Edit/Delete Message   Reply w/QuoteBBBBBB
I have to ammend something i typed in my last post, I said to go to a 95-3 RR, I ment a 93-5. Brain fart!

Back to the Archives