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Author Topic:   3 link hiking up and staying laid over down the streights.......sugestions??
JT54
Dirt Maniac

Total posts: 170
posted July 15, 2004 12:41 PM  
I am finaly liking my 3 link car on dry slick ,thanks to all who have offered sugestions .......the prblem I am having now is when the car hikes up in the turns it is staying laid over on the right rear,or maybe the right side would be a better description ....on the videos I have watched the car just never seems to flatten out coming off the turns and is always carrying the left front depending how much bite the car is getting .....This is what I think is happening ,It looks like when the left rear hikes up it is teetering onto the right front and never quite bouncing back .....I am also suspecting too soft a right front because I have always had to work hard on entry to get the car to turn ,as if the weight is transfering to the right front and staying there too long......some people have sugested a tie down on the left rear to slow down the weight transfer but I am not sure I have always thought that a tie down worked best on a heavy track.......I have a small metric with metric lowers and pinto spindles 900 left and 1000 right 225 left rear in front 200 right rear on top 14 inch shorty panhard at 20 degrees just below the pinion ....left link 16 1/2" at 16 degrees right link 21" at 12 degrees ,60 % rear 52.5 left and 54 cross ......I keep adding cross and the car keeps getting faster I just think it would be faster if I could get it to flatten out some ....what do you guys think ....spring change or shocks or what ......sorry about the long winded story

mod70
unregistered Total posts: 170
posted July 15, 2004 03:16 PM           send a private message to JT54   Edit/Delete Message   Reply w/QuoteBBBBBB
Nothing really jumps out at me, you might need to take out a couple of deg on the pan bar, but that might end up hurting you on the dry/slick. What is your shock package?

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted July 15, 2004 03:17 PM  
You might want to think about going to a 225 RR because of your high rear%. How much shock travel are you getting on RF and RR. I like to see roughly the same travel front and rear that is when our car seems to work best.

The reason it hikes up and lays over is because you have enough angle in the LR trailing arm and panhard bar that under power it lifts and holds the chassis up. You could literally take out the LR spring at that point because it really isnt doing anything. All the weight at that corner is being supported by the bar which in turn transfers that weight to the axle and then to the tire and the ground for better bite. The way to get your car to stay flat would be to take out the angle in your panhard and trailing arm but then you lose the forward bite advantage because a portion of the weight that was originally supported by the bar is now being used to compress the spring and bounce around as the car moves instead of being directly applied to the track.

[This message has been edited by dirtbuster (edited July 15, 2004).]

JT54
Dirt Maniac

Total posts: 170
posted July 15, 2004 05:21 PM  
I have 75-3 lt front 76-2 right frontand 94 on the back.....about 3 1/2 " on both front shocks 3" left rear 4" right rear .....forward bite is my friend and I would hate to do anything to loose that.

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted July 15, 2004 10:49 PM  
nothing wrong with the car doing that its going to be tight in your going to have to drive it in real hard set the car early into the turn...
you can put a softer shock on the right front to help it turn in thats about it

mod70
unregistered Total posts: 874
posted July 16, 2004 10:53 AM           send a private message to Xtreme12x   Edit/Delete Message   Reply w/QuoteBBBBBB
You've got me on this one dude. Shocks look OK, I like to go 5/3 LR 3/5 RR on dry, but that won't change anything for you. The only other question is how much rear split do you have now?
Buster's idea about the LR arm sounds like it may be your problem, but I don't know what you could do to fix it except go to a longer arm, and it doesn't sound like you can do that. (unless you're running a plug now) Hopefully someone else has an idea.

#13 mod
Dirt Full Roller

Total posts: 72
posted July 16, 2004 01:34 PM  
I've got a question, is it fast when it's handling like this?? If so don't fix it, stand on it!!

JT54
Dirt Maniac

Total posts: 170
posted July 17, 2004 10:39 AM  
Yes ,it is fast ....but we think it may be alittle faster with some changes.......I was looking at the video some more and found that the right front tire is realy rolling under aqnd getting alot of side wall on the track ....I have been running 13 lbs but it looks like it could use some more psi.....also moved 65 lb of lead from just behind and to the left of the cell, to left side of the cell......this added about a .3 percent left side weight but rear remained the same.......the reason I did the weight change was I think that the lead was keeping the car rolled over to much ....we will see....thanks to all who have given sugestions .

mod70
unregistered Total posts: 170
posted July 17, 2004 10:44 AM           send a private message to JT54   Edit/Delete Message   Reply w/QuoteBBBBBB
If it's rolling under that much you may want to add some camber to it. Next time you run feel the RF tire across the surface. If the outside is hotter than the rest of the tire this could be your problem. (especialy if the sidewall looks like it's getting really tore up)

JT54
Dirt Maniac

Total posts: 170
posted July 17, 2004 12:49 PM  
I will try a little more preasure first .....I have thought about the camber but I am already running 3 1/2 to 4 degrees.

JT54
Dirt Maniac

Total posts: 170
posted July 18, 2004 01:14 PM  
OK,heres what I found out....on tacky heat race car was a three wheelin fool .....fast but had to drive it in to hard to be efective in trafic.....
sooooo I decided to try some shock changes to slow the roll to the right a little .....bingo!....right rear was on a 94 and was moving about 4 inches ,switched to a 96 ......left rear was hiking up to fast so I took of the 94 and put on 93-5 to slow that corner down a bit....it all worked good .....started 8th row inside on 50 lapper ,car stayed stable and drivable all over the track ,high,low it didnt matter .....good forward bite and excelent in deep traffic .......got in trouble early trying to pass 2 cars at once when I probably should have only tried for one....got on brakes to hard going into turn one and spun ,had minor contact to the left front but got a flat out of the deal.....started from the back on the restart passed 6 cars spun again avoiding 2 squiril right in front of me ,lost 4 spots ,got them back by the half way point and passed a bunch more lead lap and lapped cars by the end ,not sure where we finished but ....in the top ten I think ,but believe it or not I am happy with that finish because I finaly have found the set up that works .......at the end I was going to the front and passing cars each lap....all we need now is a little luck .

mod70
unregistered Total posts: 170
posted July 18, 2004 01:21 PM           send a private message to JT54   Edit/Delete Message   Reply w/QuoteBBBBBB
Glad to hear it dude! Keep it up and thanks for the update.

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