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Author Topic:   3 link lr bar
I-B-RACIN
Dirt Maniac

Total posts: 132
posted February 17, 2005 03:07 PM  
Not trying to beat a dead horse with 3 link ????'s but what is the shortest lr control arm anyone has had good succses with. thinking about trying a 12inch and the spring clamped up solid in front. rr on top and and like a 20 inch on that side long panhard behind rear.. looking for any info on this type of setup. spring rates shocks.ect... thanks

udecide66
Dirt Freak

Total posts: 229
posted February 17, 2005 03:27 PM  
I ran almost exact setup last year, LR bar was 12 1/2"(15* angle) center of heim and the RR was 20"(5* angle) center of heim. I ran both springs clamped up in front of axle. I used a 19" panhard bar pinion mount, left side of frame to center of pinion (the new afco pinion mount) which allows you to put the panhard bar directly below the yoke. I had about 4-5" of rake in it, car rolled over real well and had good forward bite. the car also cornered very fast and was very easy to drive anywhere on the track.
I sold that car to a friend but I still do the setup on it, I think we are going to try the RR spring behind the axle for a few races.

Jason Alderson www.aldysspeedshop.com

andykmod
Dirt Freak

Total posts: 351
posted February 18, 2005 07:54 AM  
My dads lr was 11 inches and rr was 23 inches and ran a long panhard bar. Never had any problems and worked ok

badfastjr
Dirt Maniac

Total posts: 193
posted February 18, 2005 11:21 AM  
mine is about 12" on the lr and 18" on the rr.....i have a j-bar. I havent ran it yet like this, just wondering what changes i can expect out of this, will the car be tighter in, looser in? and what causes it to do whatever it does........sorry to jump into your question I-B, but i was wondering exactly the same thing as you.

Fastride 38
Dirt Maniac

Total posts: 125
posted February 19, 2005 09:51 AM  
My left rear is 8in and my rr is 9in. I'm running a 19in straight bar(per IMCA) on front. Seems to work ok for me.

I-B-RACIN
Dirt Maniac

Total posts: 132
posted February 19, 2005 03:48 PM  
So do cars with a short lr get on the bars like a 4 bar? (trying to calculate shock travel needed)

MJC
Dirt Roller

Total posts: 12
posted February 19, 2005 04:47 PM  
This setup works good. It will drive the LR under the car and depending on your spring setup, will lift the LF wheel. It also roll-steers like a z-4 car.
I would go with a J-bar instead of a rear mount panhard bar (personal preference) gets the car over on the right side faster. Once the car has rolled should be able to drive the car off the corner nice and straight.
Seems like the more the car rolls the harder it hooks up. Have been very happy with almost identical set-up.

------------------
Go Fast, Turn Left?

I-B-RACIN
Dirt Maniac

Total posts: 132
posted February 19, 2005 06:21 PM  
What type of lenght do I want to try and run for a j bar and what amount of angle do I start with.. And the term (RAKE) what is that I have seen it throughout different posts is that the angle down or back

2nd2none
Dirt Forum Champ
Total posts: 755
posted February 19, 2005 06:49 PM  

 
getting the LR to tuck isnt always because of how short the LR bar is. This photo was taken my rookie year in a mod, it was a 21" heim to heim on both side 3 link with a solid pullbar.

Fastride 38
Dirt Maniac

Total posts: 125
posted February 19, 2005 08:11 PM  
You are right the links aren't what get the job done, but they make the rear end react faster. I guess it just depends on what the driver likes for feel in their car.

I-B-RACIN
Dirt Maniac

Total posts: 132
posted March 30, 2005 06:29 PM  
TTT

I-B-RACIN
Dirt Maniac

Total posts: 132
posted March 30, 2005 06:36 PM  
Ended up with a 12 inch lr 18 inch rr long panhard behind rear and 30 inch biscuit bar so i am looking for any Idea on a shocks package 800 rf spring 700 left front 250 lr clamped in front 200 rr on top of rear end..and this is on a non underslung car so will I need a limiter strap to stop the from pulling shocks apart.. at ride height I have about 2 inch exposed on the lr shock..and If I need a limiter will it only bee needed on the left rear...and how much drive shaft travel will I need to have

[This message has been edited by I-B-RACIN (edited March 30, 2005).]

terrellracing
Dirt Full Roller

Total posts: 69
posted March 30, 2005 07:28 PM  
i'm running the exact same setup you are. lr spring in front(200#, 93 shock) rr on top(175#, 935 shock). tonight was first night(practice). car was awesome! turned on a dime lots of forward and side bit, pulled wheel off ground about 6inches. have solid pull bar. have 9in pan hard bar cen to cen. 8in off bottom of mount to center of heim. at ride height have about 3in of shock sticking out. you should be alright with your 2in. running 600lf and 700rf springs with 763 shock on lf and 735 shock on rf.
question for you is you spring on top on rr have any angle to it or is it straight up and down? my car has about 10 lean in on it will give more side bit if angled in.
let me know if any other questions.

dluna
Dirt Freak

Total posts: 334
posted March 30, 2005 08:52 PM  
terrellracing -

Would you care to share the percentages and bite you have with this setup?

Where is your panhard mounted on the rearend? Inline with the yoke?

THANKS!

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted March 31, 2005 10:59 AM  
You all might also consider mounting your spring on the arm on the lr... It's been working well for the DW and GRT boys lately, and we ran a car a few times with it last year and really liked it.

A&M Motorsports
Dirt Maniac

Total posts: 117
posted March 31, 2005 12:45 PM  
x-treme are you saying to run a swingarm on the left rear with the 3 link set up?

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Artie Perilloux
A & M Motorsports

ukandesperate
Dirt Full Roller

Total posts: 45
posted March 31, 2005 01:36 PM  
just a quick question,on the swing arm setup,how far off the axle is the shock connected roughly,is it a percentage of the total rod length or a set distance from the axle? cheers

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted March 31, 2005 01:49 PM  
Yea, on the left rear try a swing arm. Keep it the same length heim to heim as your short 2 link bar. We mount the shock about 4 inches below the bottom of the housing, and about an inch behind it, or whatever allows us to get the most drop, or right until it hits the underslung. The swing arm is coming back around. I've got one that I'm going to run this year, it'll be right around 16 inches heim to heim. You'll also want to make sure that you build the arm so that when the rearend drops and the bar stands on end (lots of angle) that the slider doesn't bind up on anything. The short afco arm works I think, not 100 percent positive but we ran it on a dirtworks last year but not with a lot of rear steer or a drop in the frame like we do now. You'll want to put about 25 degree's uphill angle to start in the left rear bar.

terrellracing
Dirt Full Roller

Total posts: 69
posted March 31, 2005 06:35 PM  
dluna-- and anyone else interested.

LF+RR-50.6% -- RF+LR-49.4% -- LEFTSIDE-52.8% -- RIGHTSIDE-47.2% -- FRONT-41.3% -- REAR-58.7% that is with no lead, 27 gallons of fuel. WEIGHTS LF-521/RF-441/LR-709/RR-657. panhard bar is second hole from bottom of mount on rearend.
the car was a little tight middle off last night, crank one full round in RR, helped a little. going to move RR bar up next weekend. right now it is almost level.
Hope this will help.

I-B-RACIN
Dirt Maniac

Total posts: 132
posted March 31, 2005 06:58 PM  
terrelracing are those scale percents with or without driver??? And one of the earlyer posts reccomended that I run a short pinion bar but no room perminting to do that how about the idea or running a shorter panhard but stay mounted to the back of rearend???I would just add another mount to the rearend. Or would that still be a different affect on handling???

terrellracing
Dirt Full Roller

Total posts: 69
posted March 31, 2005 08:46 PM  
ibracin, the car was weighed without driver. not sure about short bar on back of rearend, wouldn't hurt to try it though would it. if doesn't work go back to long one. i ran a long bar behind the rearend on my z-link car, the only thing it does is slow down how fast the car reacts, the longer the bar the slower, shorter faster reaction time. if your comfortable driving with the long one try it before you add anything, but like i said trying never hurts, you might like it alot.

wissota3x
Dirt Forum Racer

Total posts: 86
posted March 31, 2005 09:11 PM  
There is a real slick way to mount a short (19 inch panhard)on the back of the rearend.If anyone is interested I can post some pics.The heim on the rearend side mounts just to the right of bump for ring gear on a 9 inch housing.That puts it about straight back of the pinion.

doghouse racing4
Dirt Forum Racer

Total posts: 91
posted March 31, 2005 09:17 PM  
yes, I would be interested in seeing this, please post pics. Have you tried this and what were the results of going to it????

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted March 31, 2005 11:09 PM  
if you did the same thing on the front of the housing (if you could) there would be two completely different effects...

wissota3x
Dirt Forum Racer

Total posts: 86
posted April 01, 2005 06:07 PM  


 
Dog house,
Here is your pics.To tell you the truth where we race most of the panhards are behind.The best cars have them mounted like this.I haven't experienced a J bar so I couldn't tell you the difference.All I know is what I've read about.We also don't see many spring third links.We all use the allstar puck bar with very little movement.This probably limits the different affect a behind panhard versus a J bar ??? I believe the surrated bracket and the slider can be found on Day Motorsports catalog or web sight.I have mounted quite a few of them and there are a few measurements and details that I can give you if you want.

DIRTRUNR
Dirt Full Roller

Total posts: 43
posted April 03, 2005 12:38 PM  
2ND2NONE WHAT SPRINGS AND SHOCKS DID YOU HAVE ON THE CAR? ARE THE SPRINGS ON SLIDERS OR ON TOP OF THE REAREND? DID YOU HAVE ANY PROBLEMS WITH THE SOLID THIRD LINK ON DRY SLICK TRACKS?

jtno6
Dirt Forum Racer

Total posts: 87
posted April 11, 2005 11:07 AM  
wont this make the car run down the front strech side ways (dog walking) with a 12 inch (on the left driver)and a 18 on the right?

dluna
Dirt Freak

Total posts: 334
posted April 11, 2005 12:04 PM  
jtno6 -

You want the wheelbase to be the same on both sides still, so you just build a spacer on the LR. It bolts on to the existing frame mount, then runs rearward a few inches, thus allowing a shorter bar to be used on the LR.

tilley88
Dirt Forum Champ
Total posts: 879
posted April 11, 2005 12:42 PM  
jtno6,

I told a fellow racer about the short left/long right set-up one nite and really got him thinkin. A couple of days later he asked me to come to his shop and help him sort out this new set-up on his car, and when I got there and looked at it I busted up! He had a short bar on the left, long on the right, and no plug on the LR. That car sure looked funny! After explaining the "plug" to him, he got this look of relief on his face and told me he was glad his brother was'nt gonna have to drive it like that!

jtno6
Dirt Forum Racer

Total posts: 87
posted April 12, 2005 10:11 AM  
so you fab a bracket on the left rear that(short bar) will keep the car the square ,but when it goes in to the corner and rolles to the right side,it pushes the left wheel froward (rear steer)

jtno6
Dirt Forum Racer

Total posts: 87
posted April 12, 2005 10:13 AM  
does anyone make a bolt on spacer if you dont know how to weld

jtno6
Dirt Forum Racer

Total posts: 87
posted April 12, 2005 10:14 AM  
sorry bad spelling

tilley88
Dirt Forum Champ
Total posts: 879
posted April 12, 2005 10:59 AM  
If you mean "plug", Dirtworks makes 'em. I'm sure other chassis builders do, too. They cost around $100 each. I made my own. Buddy up with someone that can weld and save yourself some money. Look on ebay and other race sites to see if you can find one for sale that fits your application.

dirtzone
Dirt Maniac

Total posts: 102
posted April 13, 2005 03:47 AM  
quote:
Originally posted by tilley88:
jtno6,

I told a fellow racer about the short left/long right set-up one nite and really got him thinkin. A couple of days later he asked me to come to his shop and help him sort out this new set-up on his car, and when I got there and looked at it I busted up! He had a short bar on the left, long on the right, and no plug on the LR. That car sure looked funny! After explaining the "plug" to him, he got this look of relief on his face and told me he was glad his brother was'nt gonna have to drive it like that!


'That's funny right there, I don't care who you are' - Larry the Cable Guy

49mtmod
Dirt Maniac

Total posts: 127
posted May 05, 2005 06:52 AM  
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