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Author Topic:   DW 8 Short 2 link help
nolimit92
Dirt Forum Racer

Total posts: 97
posted April 21, 2005 07:27 PM  
A good freind has a DW 8 with a 12" lR link and a long RR link. Slider in the back or rearend on the RR and in front of the LR. 100# rear split and even on the front 58.5% rear. The problem is the car has a terrible push on corner entry and thru the rest of the corners. It also has almost no body roll! I race a 4 bar Z set up and have seen alot of short 2 links have tons of body roll. My question is what could possible be stopping this car from rolling over?

speedy46
Dirt Maniac

Total posts: 165
posted April 21, 2005 08:43 PM  
im guessing it has a long panard bar on it??? that could really do it what is his LR trailing arm angle?? does he have it cranked up alot or flat? and do u have the rearend stright or do u have lead? u might wanna put some trail in it that will help a push problem

dirtzone
Dirt Maniac

Total posts: 102
posted April 22, 2005 03:49 AM  
quote:
Originally posted by speedy46:
im guessing it has a long panard bar on it??? that could really do it what is his LR trailing arm angle?? does he have it cranked up alot or flat? and do u have the rearend stright or do u have lead? u might wanna put some trail in it that will help a push problem

speedy's right, check all that stuff first. If it looks to be ok, then I'd look into changing a front spring to loosen the entry.

nolimit92
Dirt Forum Racer

Total posts: 97
posted April 22, 2005 05:52 AM  
It has a J-bar, running about 5 deg angle. Lr trailing arm is about 15 deg. And we have the RR wheelbase 1/4 longer.

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted April 22, 2005 07:39 AM  
Put the pullbar down as far as you can on the chassis and as High up on the rearend as you can. Take that J bar off there and put a mid sized panhard behind the rearend (If the car has the mount on the housing for it), this should be close to 19 inches. You'll want about 5 inches of split in it to start, keeping the panhard about 1 inch from the bottom of the housing, and then set the chassis side accordingly.

tilley88
Dirt Forum Champ
Total posts: 879
posted April 22, 2005 12:03 PM  
I've got the same problem with my short 2-link (both sides), no body roll, tight thru the turns. The rear of the car does not want to soften up. I put in softer springs, shocks, short panhard bar, j-bar, tried different pullbar angles, checked for binds, raised and lowered ride heights, etc...nothing seems to help. I'm running 650-700 springs in the front. Thinking about swapping those around. I'm starting to think my roll problem is starting with the front end.

JDF Motorsports
Dirt Freak

Total posts: 216
posted April 22, 2005 12:40 PM  
Ditto here, I have a DW8 Short bar 2 link, acting JUST like what you are talking about. I tried moving the the j-bar, lower links, all of it. Very little roll compared to other cars. What about going to a short panhard bar on the left side of the pinion?
I'm about ready to go back to a Street Stock??$$(&^@#$,.

dluna
Dirt Freak

Total posts: 334
posted April 22, 2005 01:53 PM  
I’ve been talking back and forth with dirtbuster (user on here) about my 3-link DW 8. I was considering putting the RR spring behind the axle on a coil-over. Right now, the spring is on top of the housing, and I’m having problems with the vertical alignment during body roll. If I can’t cure that this weekend, I’m going to go with the coil-over. I think the spring behind on the RR will tighten the car on entry and exit. When you get off the gas, it compress the RR more (axle un-wrapping), which will tighten entry. Then on the gas, the axle wrap will decompress the RR spring, putting more of the load on the LR, making the car tight on exit as well. Dirbuster’s team had to run the LR bite as low as in the teens to loosen their car. So perhaps with 100# of LR, that could be your friend’s problem…I would think this would have more to do with tight on exit.

Before last week’s races, I had to put a bigger spacer in where the trailing arm mounts to the rear housing. The jam nut was hitting the housing mount during roll. That seemed to help some for me.

If the car is tight all over, use a wheel spacers or different wheels to move the rear track an 1” or so to the right…increase LS %, drop the lead down lower on the left side, increase rear stagger. I agree it just seems like the car should roll like crazy, but if the car is working, I wouldn’t worry too much about it.

If you can fit a straight panhard bar on the left side of the pinion, I’d go with that. 4 – 5 inches of rake, and about even with the yoke should make the car roll plenty.

Good luck. I’m still trying to figure this thing out as well!

xhubby
Dirt Freak

Total posts: 376
posted April 22, 2005 05:12 PM  
Tilly88, we swapped ours at the end of last year on our DW-8 short 2-link when our track was real dry. It helped out alot. We ran a 750 on the LF,& a 700 on the RF. This year so far our track has been really rough, so we went to a 650-LF, & a 750-RF. So far, so good.
We are having a little trouble though getting our car to pivot right at the apex. Last week we put a 20/20 biltein on the LF, & the car did turn better.

grumps
Dirt Roller

Total posts: 6
posted April 22, 2005 06:57 PM  
go to www.stlracing.com look under 2005 photos look for montgomery county speedway 4/2/05 photos and look at the first photo the green car is a 2 link with long bars lots of roll and tons of bite???????

dluna
Dirt Freak

Total posts: 334
posted April 23, 2005 07:51 AM  
Hoosier tires and a MONSTER motor...

Fast406
Dirt Roller

Total posts: 8
posted April 23, 2005 11:33 PM  
Rear end needs to have plenty of travel down. Its a DW8 so im sure it has the lower tubing with the bend in it. Axle needs to drop way down so it can move forward and get under the car. In my opinion best thing to do is put the lr spring on the lower link ie: swingarm. You will have to go up to 300# or above rate, but you will be suprised at the way the car will go around the turns.

rpm20
Dirt Freak

Total posts: 338
posted April 25, 2005 06:19 AM  
fighting the same issue on my dw8 z-4 car and its frustrating as **** .
we run a 650lf 680rf
225lr clamped in front, 170rr on the housing and 1/2" lead in lr. poor shock travel,tight in and through, needs gas to loosen it but then its too much

we will try higher p bar, more stagger, and softer 600lb lf spring and see.

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