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Author Topic:   no roll on a 4-bar GRT
DMS CEO
Member
posted May 08, 2003 11:01 AM
Everything works free by itself but as a finished product the car is inanimate. It is a freaking sled. 150 rr, 200 lr, 650rf, 600 lf, 94 rr, 96 lr,74 rf, 76 lf, pull bar with medium biscuit, j-bar from l-r @40 degrees, 4 rr, 3 lr, 3s up front, 90 lb of lr in car. 47 cross 60.1 rear 55 left. Any suggestions? I was thinking about locking it down and making a two link out of it. Good idea?


nvracer
Member
posted May 08, 2003 01:51 PM
I currently run a 93 shock across the back, with 150# RR 200#LR. The car rolls over a bunch.
I personally would lower the j-bar a couple of holes. I run my J-bar 3 holes down on the pinon, and mount on the chassis is 5" above the pinon mount Approx 20" Long. Lowering the J-bar will lower the roll center increasing chassis roll.
Hope this helps.


dirtbuster
Member
posted May 08, 2003 04:15 PM
I would agree 40 degrees sounds like a lot of angle in the jbar. On our 2 link Dw we run 8" up on the frame side and just below pinion level. What are your wheel weights, 90# of LR seems like it should give more than 47% crossweight.

[This message has been edited by dirtbuster (edited May 08, 2003).]

murphree todd
Member
posted May 08, 2003 06:01 PM
to much left side weight


garyl
Member
posted May 08, 2003 06:20 PM
try dropping your pan hard bar all the way down, on both ends. 94 and 93 shocks on rear. also try 100 lb stiffer rf spring , unless your running the lr spring behind the axel. if she slips off the corner{forward bite} crank in more wedge, I think you will surprised , let us know how this works for you.


CLBaker25
Member
posted May 09, 2003 06:06 AM
The 6 shocks on the left side are too stiff. I also question 90# of wedge with only 47% crossweight.


DMS CEO
Member
posted May 12, 2003 02:18 PM
I took off the top bars, ran 9.5 pinion angle, 40" pull bar straight to trans, 94 shocks on the back, locked the cages down, had both springs in front of the rear end, and tried a 150 and 225 on rr and lr. 5 on the rr and a 2 on the left rear and didnt do a dang thing but turn 9400 rpms and go backwards. I raised the j-bar on the pinion. I have lots of left rear and cross now ( 115 and 49.8). Somebody has to help me or I am pulling my motor and tranny and going back to super stock.

[This message has been edited by DMS CEO (edited May 12, 2003).]

CNC DOC
Member
posted May 12, 2003 05:43 PM
Give me a ballpark figure on wheel weights.


CLBaker25
Member
posted May 13, 2003 10:15 AM
Just a thought.Have you tried supporting the rear end & then removing the shocks & springs then lifting the axle up & down on either side to check for bind?


DMS CEO
Member
posted June 03, 2003 10:25 AM
Boys I have it rollin. It pulled the left front a foot off the ground. I lowered my pull bar and made new mounts for the bottom control arms so I could get more angle out of them. It pulled it so high it yanked my eliminator in half. It is a little too loose now on entry. Any ideas?


Wauge28
Member
posted June 03, 2003 12:25 PM
Reduce your LR bite to get the loosness out when entering. I would also reduce the angle in your pull bar. Get all 4 on the ground and go faster. I promise


DMS CEO
Member
posted June 03, 2003 02:32 PM
I wasnt running a 90/10. Would that tighten it up on entry? How would I prefer to reduce bite, lowering the lr bar or take a round out of the lr spring, or take some out of the rf spring.


Wauge28
Member
posted June 03, 2003 03:00 PM
I like to keep the ride heights the same so take turns all the way around. Start with one out of the RF and LR and One in the RR and LF. With course bolts, this will drop you about 1 to 1.5 percent on cross. Adjusting the bar angle (4 bar) wont change much on entry when off the gas. It is mostly effecting the drive of the tire when on the gas. The turns will press the wheel down regardless of bar angles...when off the gas.

[This message has been edited by Wauge28 (edited June 03, 2003).]