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Author Topic:   D&M Wishbone?????
dirtracer14
Member
posted August 20, 2003 11:08 PM
Before the year started there were a few guys on here with the wishbone cars. This was my first year in one going from a 6 link. I spent most of the year trying to keep the bite out of the car...we have tacky tracks most of the time. I have kept the pushbar in the car all year trying to find a happy spot ....but it is very tough to keep the bite down so the chassis wont lift to much and still have forward bite. I remember some of you saying DO NOT run the pushbar if there was any tack in the track.....Im ready to listen i have a pullbar made up and am ready to put it in but looking for angle and placement on the rear....i have the D&M rear with the bolt on peice for the pullbar...should i use that one? or use the pushbar mount? How much will the chassis lift if i put it on the bottom hole in the chassis? We have 1 race left at the local track thats for points and this fri we are heading out of town for some testing... If you want to pm thats cool also i just dont want to be to far out. BTW this is the car with the z link mounts on the lr wich is the way i run it instead of the wishbone...but the rr is wishbone just a tad up from center...I also tossed the 90/10 shock to help drop the car for the turns.


CUSTOMPERFORMANCE
Member
posted August 20, 2003 11:20 PM
Harris Auto Racing tested this wishbone/ladder bar setup the 94 or 95 season on John Logue's car. They ran a pullbar forward to about the middle of the car not quite to the driveshaft loop like most of them are. The car was very very fast with lots of forward bite so much that at times you could see air under both front tires, the downside with the front off the ground most of the time was it wasnt very drivable in traffic. They never ran it again after 94/95. I think the problem was they used the same holes as a regular 2 link on the frame brackets which may have been too much angle in the wishbone arms. i am considering doing some testing of this setup next year. By the way the links we had used were 20" long how long are the D@M wishbones? others i have talked too say theres are almost 30" long on the Champion Chassis.


dirtracer14
Member
posted August 21, 2003 12:02 AM
Hey rich hows it been going? Yes there were nights it felt as if the front was off the ground and nights the rear would bite so hard it would come a foot off the ground if i hit a rut from pinning the rear to the underslung. The lt side is about 15" and the rr is 32" but i dont really use or need the wishbone on the lr because of the amount of bite in the track so i use the z link on the lr with a 15" forward bar and a 22" rear bar and can still get good bite with it. The pullbar mount is pretty centered on the car ...back from the loop like you were saying. I have plenty or room to go up or down on either side and have really made some changes this year to see the affect. I did run the wishbone both side for a few weekend but i looked like a bobble head in the car from the rear bouncing when it hit bumps on the straights!


Bumper
Member
posted August 21, 2003 10:42 AM
Dirtracer, we talked in the beginning of the year about this. Since then I had to replace my rear clip on the D&M, and went to their new 4 bar setup.(which I love) Before I did that, I changed my pullbar mounts, and moved them to the left of the driveshaft hoop and low. I also cut the old pushbar brackets off of the rearend, and went with a new one that has 3 holes for adjustment. If you are wanting to keep the brackets so you can run both the push, and pullbar, use the holes towards the front of the rearend. The car really had some bite, but we almost allways run on dry tracks. From what you told me, you run on Hoosiers, and the track stays heavy? If I am right, and you have the pullbar mount that is above the hoop and centered, start with the top holes on both sides. P.S. I told you the pushbar was a rodeo...lol


dirtracer14
Member
posted August 21, 2003 08:17 PM
Yes you told me it would be a ride lol i did stay on for more than 8 sec thow i am just wanting to tame the bull ab it more. The car i have has all the new mounts on it the pullbar is back from the loop quit a bit and low and the rearend brackets has both mounts but i have to bolt on the extra peice for the pullbar. I think with more motor it would be fine i just dont have the big ponies that this car would like. When you say 4 bar clip is that for both sides? I could go 4 bar on the rr but not the lr the holes dont go high enough for me and i can get it pretty good with the z link on the lr. I have pulled my pushbar mount out of the car 2 times now and am getting tired of adding more bars and welds to keep it in the car...i think i will leave the mounts for when and if we ever get a real smooth DRY track!!


fastow
Member
posted August 21, 2003 11:05 PM
The push bar goes to the rear of the car instead of a pullbar that goes to the front


dirtracer14
Member
posted August 24, 2003 11:37 AM
Well went out fri with the pullbar on and left all else the same, we went to a dry big 3/8 track. The car was awsome....so easy to drive it would set down pretty hard for the turns so we put the 90/10 back in and that helped to slow it a tad plus i was letting the car sit to long befor getting back in the gas. the only thing i was missing by the main was a bit of forward bite....it was pretty black by the main so next time ill bring a spring bar instead of a rubber bar. The guy that won was in a big dog car...anyone run one? That car looked real easy to drive and way more forward bite than myself?


o5racer
Member
posted August 25, 2003 12:21 PM
Ok this may sound stupid but what is a wishbone? Is that where the upper and lower links on one side go to one mounting point on the frame?


Bumper
Member
posted August 25, 2003 12:26 PM
DR 14, its a true 4 bar car now. I am using a spring and a rubber in my pullbar. It works great, call Jimmy, ask him about it.


GO 24
Member
posted August 25, 2003 01:52 PM
o5racer, yeah that's right.


dirtracer14
Member
posted August 25, 2003 10:38 PM
Hey bumper i have that bar allready from my 6 link....was going to try it on the next dry track. What color rubber you use and what spring rate....if you dont mind You run the short lr 4 bar and the long rr 4 bar? Did you use the mount on the rr that came with it....mine is about 18" tall on the rr but the lr is to low i am adding a upper mount this winter for the 4 bar lr.


Bumper
Member
posted August 27, 2003 12:34 PM
I have short bars on both sides now, and I have changed the mounts on the left and the right to D&M's 4 bar mounts. I dont know the exact measurement of the mounts, but I will check. I use 600 and yellow on the pullbar. Before the big crash, I added a mount above the allready existing mount on the left side so I could split the bars more.(at this time I still had the long bars on the right) It worked pretty good, but I did not have a chance to play with it much because of the wreck. The first time I used it, I put the killer dry setup on it, and was pulling some huge wheelies. The next week, i calmed it down, but was involved in a early crash and didnt really get a chance at driving it. I would not be scared of doing this, I think it will work with some practice.


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