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Author Topic:   trailing arm ?
teamstertom
Dirt Forum Racer

Total posts: 89
posted January 18, 2003 06:33 PM
What's the hot set up for bushings in the arms? The 73 Monte Carlo that I am building needs new bushings,so which direction should I be going?

M.R.B
Dirt Roller

Total posts: 13
posted January 18, 2003 06:48 PM
I researched this for about 3 months on the net before I did anything. What I came up with was that if you run urethane bushings in the rear you shouldn't run all 8 of them that way. Run urethane on the rear end side and rubber on the frame side. Reason; if you run all urethane it will bind. I boxed my lower control arms to make them stronger, on the rear end. Don't know if this is the best way to go, haven't run the car yet, but this is what I came up with.

racer17j
Dirt Forum Champ
Total posts: 1565
posted January 18, 2003 08:23 PM UIN: 54865418
i have always just run the stock ones if i was ever to change them tho i would go with the polly on everything but the top of the rear end it gives you a little flex

Factory36
Dirt Roller

Total posts: 18
posted January 18, 2003 09:17 PM
I'm with racer17j on the urethane. There should be enough flex to prevent any damage. The only time I have heard of issues when swapping out the stock rubber bushings is when switching to all solids. I personally run stock rubber ones on the rear and all solids on the front.

loojack
Dirt Maniac

Total posts: 133
posted January 19, 2003 07:08 AM
Has anyone heard of welding washers on the passenger side frame mounts and using all stock rubber bushings to get roll steer? Just wondering.... loojack

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Middle aged wannabe racer!

outlawstock17
Dirt Forum Champ
Total posts: 620
posted January 19, 2003 10:28 AM
urethane bushings will flex enough to keep from binding. another tip is to use longer than stock bolts and use washers on both sides and double nut the bolts. tighten the first nut until it just barely touches the washer and then use the other nut to jam it so it doesn't come loose. this will help free up the rear suspension.

o5racer
Dirt Maniac

Total posts: 115
posted January 19, 2003 02:09 PM
Yea outlaw thats a great idea untill the holes get all egged out and sloppy and the rearend shifts back and forth. If you like welding in new washers around the holes all the time go for it.
as for the rear steer idea, what i heard was to use poly bushings on the left side and the oldest softest rubber bushings you have on the right. the left side will stay put, but the reight side will shift slightly to the rear under braking, losening the car up. and under power the right side will move ahead a little tightening it up.

outlawstock17
Dirt Forum Champ
Total posts: 620
posted January 19, 2003 02:48 PM
if you weld in grade 8 washers, it will last longer than you might think.......

AUS RACING
Dirt Roller

Total posts: 17
posted January 20, 2003 02:06 AM
i,m with 05racer, have tried running soft right side bushes & hard lefts with noticable gains on dirt & bitumen.

dirtracer7
Dirt Maniac

Total posts: 106
posted January 21, 2003 07:43 AM
I just talked to stock car products about a week ago on this subject.I wanted to go with mono ball on the frame mounts and stock on the axle end.I also questioned mono balls in both ends of arms.As far as the 8 mono balls he said no.When you get on the throttle there would be no give and the tires would break loose easy.They reccomended drilling through the rubber or whatever material there made of to let them flex more, or as outlaw stock said with no springs or shocks hooked up move the arms and tighten the bolts until you start to feel a little resistance.I'm going to weld some grade 8 washers on and run my arms loose. besides its a lot cheaper method to try.Others at the track have said to do the same thing.

RC Racing
Dirt Maniac

Total posts: 144
posted January 21, 2003 09:11 AM
To "dirtracer7" or whoever can answer this question. What are "mono balls"?

Very interested in this topic y'all have got going here. Last car I raced was on leaf springs, so this "trailing arm" stuff is foreign territory.

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outlawstock17
Dirt Forum Champ
Total posts: 620
posted January 21, 2003 09:53 AM
RC, i think a "mono ball" is a vasectomy gone awry....lol.

seriously, i believe dirtracer was referring to a rod end, a heim joint or a bushing with a similiar mechanism in it.

DMS CEO
Dirt Freak

Total posts: 212
posted January 21, 2003 10:19 AM
The mono ball system is just like a hidden heim setup. It is a sleeve inside the trailing arm with a ball that looks like the inside of a shock end. They will work if you run all four arms with them in both ends..."Wheel spin comes from not having a calibrated foot"..Dale Earnhart Sr.

powerglides
Dirt Full Roller

Total posts: 69
posted January 21, 2003 10:53 AM
I weld a flange nut (doesn't have to be a flange) to the mount then tighten the bolt and loosen it just until arm moves freely. Then I jam another nut against it. This way the bolt does not rotate in the mount and wear out the hole but the suspension is free. It works great,

dirtracer7
Dirt Maniac

Total posts: 106
posted January 21, 2003 11:58 AM
Dms are you sure that the rear suspension won't bind with mono balls in all positions.It seems to be the general opinion to not run them in both ends on dirt.That a good explanation of a mono ball.Outlaw a mono ball can also develope from being in the wrong place at the wrong time.Powerglides idea sounds simple enough and should reduce the wear on the mounts.

DMS CEO
Dirt Freak

Total posts: 212
posted January 21, 2003 12:46 PM
Powerglides has the tightening deal right, as far as not binding I havent had any problems with that and I had mine on a chassis dyno in California. I run a 434 @ Batesville and dont spin the tires when it is as dry as a popcorn fart.(NO TRACTION DEVICE, EITHER)My ol' car hooks pretty hard though.

M.R.B
Dirt Roller

Total posts: 13
posted January 21, 2003 01:22 PM
On page 12,Show topisc from last year.You will find some very good info.Rear control arms.street stock/hobby tech talk.

outlawstock17
Dirt Forum Champ
Total posts: 620
posted January 21, 2003 02:02 PM
excellent powerglides! that's why i read this forum!

bizkit755
Dirt Roller

Total posts: 5
posted January 23, 2003 04:14 AM
Where can I get this mono ball set-up ???


powerglides
Dirt Full Roller

Total posts: 69
posted January 23, 2003 06:22 AM
I would NOT use them on dirt. They are great on pavement. But expensive and to rigid for dirt. IMHO

cyc74
Dirt Roller

Total posts: 15
posted January 24, 2003 04:13 PM
ran mono balls on all 8 there are some tricks to run them on dirt. you can with them in and no shocks or springs in can take the rearend and move it up and down with one hand try that with stock or urethane

Bob0092
Dirt Roller

Total posts: 16
posted January 25, 2003 12:17 PM
have had good sucess with monoballs, but everybody gives them a bad rap, because they are high maintance, they need to be cleaned, lubercating after every race so they dont start binding, not cutting on peoples maintance programs but some thick they buy the best and win without working working on the cars,

bizkit755
Dirt Roller

Total posts: 5
posted January 27, 2003 08:31 PM
OK, but where do I get them ???

bobaluuu
Dirt Full Roller

Total posts: 56
posted January 27, 2003 10:39 PM
[QUOTE]Originally posted by cyc74:
, bud , your a c--kstrong dude if you can move that rearend up and down one handed(LOL)

6pack
Dirt Maniac

Total posts: 128
posted January 27, 2003 10:49 PM
You can get them here:
DCA Racing & Fabrication Inc
3257 George Street,
La Crosse, WI 54603
(608) 781-3929


Big Dawg
Dirt Full Roller

Total posts: 36
posted February 02, 2003 12:35 PM
I have to agree with outlawstock17,you need to snug your bolts up until your washer doesn't move,then back it off a hair until it does.I like to use a lock nut,but double nutting will work fine also.I also drill my control arm holes out to fit a 1/2" bolt.I'f you are running a stock rubber bushing you will have to drill it out also.Urethane bushings are usually are ready that size.I'f your holes in your frame are egg shaped,take a steel rod and push it through all four holes on your fr. lower control brackets,get it in alignment,then weld some 1/2" washers on.The washers will last you all year.

RC Racing
Dirt Maniac

Total posts: 144
posted February 17, 2003 06:31 PM
Taking y'alls advice to free up rear end. Welding washers in place and then thought I would secure everything by using 2 jam nuts. Only potential problem: they're doesn't appear to be enough threads showing/extednig past the outermost (2nd) jam nut when I'm finished. And I don't want to tighten the 1st nut anymore, or I'm defeating part of the purpose of the whole excersise (adds bind).

So what I'm wondering is:
1) where can I get slightly (maybe 1/2") longer bolts. The original ones have a shuolder machined into them starting just below the hex head.
2) Can I get away with just using a locking nut? not the type with the nylon insert, the nylon might/would give, but the solid metal ones with a taper
3) Other ideas?

Thanks all

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