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Author Topic:   black slick
leftturn73
Dirt Full Roller

Total posts: 30
posted September 30, 2002 06:16 AM
I am having problems getting side bite on black slick tracks. I have had great luck this year on normal tracks (many wins) but struggle on the realy slick tracks. I run a Harris chassis with torq. arm normal track set up is 225 or 250 torq. arm,51.5 X, LR 200 RR 175 1/4 lead T. arms in center hole 58% rear 60 lbs bite. Slick track torq. 225 or 250 225 LR 175 RR 1/2 lead 59% rear move out LR tire add the weight high and to the right. I also have lowered the panhard bar 5' and even moved the rear over. Once I tried LR trail arm up RR down. All helps but still not getting good side bit so so on forward. My next try was to go to a 175 on the torq. arm. Any thoughts would be helpfull on any of my setup.

autoshop
Dirt Full Roller

Total posts: 67
posted September 30, 2002 08:51 AM
got a harris , run rear spring on slick track 225 lr 175 rr . 225 in front hole of 5th spring mount and 1 turn preload and put lr trailer arm in top hole, any other time I run the center holes. My car will get in fine but throttle push if the track is not black slick.

Geffy95x
Dirt Forum Racer

Total posts: 96
posted September 30, 2002 10:38 AM
What about more angle in panhard,we made that adjustment yesterday and got a 2nd place finish after spinning out twice in the heat races before the change.

Greggie
Dirt Full Roller

Total posts: 68
posted September 30, 2002 08:18 PM
I am in agreement with Geffy. There are really only 2 things you can do to help sidebite that it appears you didn't try, yet. Increase panhard angle and raise your ride height. Just remember, if you get too radical on cross weight, you will lose some side bite. I would try going up 1/2 - 3/4" on ride height and raise the panhard point on the frame a half inch as well. Keep your right rear sucked in to the left as much as you can. Also, we are assuming you have the RR spring behind the axle tube. If not, you'll need to put in a 125 or 150# spring. Hope this speeds you up!!

Greggie

leftturn73
Dirt Full Roller

Total posts: 30
posted September 30, 2002 09:27 PM
I have alway run the torq. arm slider int the center position. I will try the front.

Thanks

leftturn73
Dirt Full Roller

Total posts: 30
posted September 30, 2002 09:36 PM
I tried lowering the panhard bar, I normally run at 4' down. On slick I move to 8' down, maybe not enough. With normal conditions I run both springs in front of rear. I have thought when I run a slick track to move the RR spring behind. If I do should the spring rate then be changed or leave at 175?
Thanks again for the suggestions. This being my first year in a Mod I am learning.

Greggie
Dirt Full Roller

Total posts: 68
posted October 03, 2002 07:47 AM
When you put the RR sping behind, the 175 should be fine. I have run this same way for quite a while. You could leave your spring placement as is, but change to a 150 RR. That would help you also. The set-up with the staggered spring placement gives you a DYNAMIC cross weight, meaning that as you are racing, the cross weight will change. As the rear-end indexes under throttle, the percentages change. With the RR spring behind the axle, it allows you to have a true cross weight that is pretty high, yet when you are off the throttle, you have more weight on the RR tire which helps you into the corner.
Are you getting decent body-roll in the corners at all when the track slicks off? That's going to be the tell. Also, what shocks do you have on the car? We like a 763 RF, 93's across the rear and either a 75 or 753 LF for a slick, smooth track. It really seems to promote the roll which will give you side bite.

Keep us posted,
Greg

leftturn73
Dirt Full Roller

Total posts: 30
posted October 05, 2002 06:52 AM
I have never tried moving the RR spring to the back of the rear, I will try this. I run the follwing shocks RF 76-2,LF 75-3 LR 73-5 and RR 94. My body roll is less then normal. I am going to try a 175 instead of the 225lb spring on the torq. arm. I am hoping this will allow more travel on the rear and allow more bite. Thanks for all the feed back.

Greggie
Dirt Full Roller

Total posts: 68
posted October 05, 2002 07:45 PM
Looks good for your shocks, except the 73-5 on the LR. I'd like to see you go to the straight 73. That 3-5 will tend to hold you down on the left rear and not let the chassis roll as much as with the straight 3 valve shock. You are at the same set-up in your shocks that I have run for 2-3 seasons until I put a 93 on the LR of my car and went out in the slickest part of the track and picked up the left front when I stood on the throttle. I WAS IMPRESSED!

Good luck,

Greg

leftturn73
Dirt Full Roller

Total posts: 30
posted October 07, 2002 10:16 AM
Great I will give it a try!
Thanks Greggie

dirtracr
Dirt Forum Racer

Total posts: 83
posted October 21, 2002 07:59 PM
change yer gear....just changin the lr shock will help but its just a fine tuning thing..it wont drastically change the handling if your way off or on..

jammin
Dirt Administrator

Total posts: 5093
posted October 21, 2002 08:12 PM UIN: 16262997
Something I have noticed that when a track takes rubber, is that I can decrease the crossweight in the car and put more right rear bite in the car and get good forward off of the right rear. Now, there is a catch 22 situation here.....as long as the track doesnt go slick after taking rubber, you will be ok...but if it glazes, you can be out to lunch. I have done this both ways and have seen my fuel burn off help the car during the feature....this is how I found this out. But during a long race, if you gain bite, you can also help yourself if you think there are enough cars to turn the track over. If not, then you can go one way or the other. It is somewhat of a guess....hit and miss but look at the car count for the night and how wet the track is. If you hit it, it can really help you get up front. Reading the track is about 1/3 of the battle of getting a setup to work for the feature.

jammin

leftturn73
Dirt Full Roller

Total posts: 30
posted October 22, 2002 06:01 PM
Thanks guys, I will have to try some things while paying attention to the track. Mostly the tracks I run that are black slick never turn over and stay wet slick. I have also been watching somthing, the guys who are running up front on the slick tracks all run a torque link setup. I run the torque arm setup. Has anyone had experience with both in the conditions I have explained. I was thinking running the torque arm when there is bite and switch to the torque link when I know or see conditions are slick. I don't think this would be to great of a deal to do as long as I did my home work in the garage.
Any thoughts?

JMillerJr76
Dirt Roller

Total posts: 5
posted October 22, 2002 07:09 PM
You can also change the offsets on the rear wheels. On a super dry slick track we will run a 4off wheel on the RR, and we have also run a 2off on the LR that really helped a ton in the sidebite department.

leftturn73
Dirt Full Roller

Total posts: 30
posted October 22, 2002 09:07 PM
I've tryed moving the LR out but not the RR in, I'll try both, what the heck.
Thanks

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