4 BAR on LR and 2 BAR Spring on top RR

[romeropolo]

I have a DW7 with this set up LR and RR shocks in front of axle 225 springs, 8-3 LR shock and 95 on RR. 1050 pull bar spring at 22 degrees. 7 inches of rake on J-Bar even with pinon. LR bottom bar 5 degrees, top bar at 22 degrees. RR bar at 0 degrees. 70 lbd of bite w/ driver...20lbs w/o driver.

Question- What changes need to be made to have more body roll to load the RR comming off the corner?

[washeduptoo]

When we ran this set up, we ran 60-80 lr bite without the driver. Thats a lot of rake in the jbar. Try about 5in of rake with it one hole below pinion if its a 9in. The 2link rr is a normal tight set up and doesn't really add drive to the rr but its pretty good in the slick. I would also put the rr shock behind to help. Be sure that the lr axle tube will almost touch the underslung. Just some things to look at. Good luck.

[cavemod]

how bout a 200 spr on rr with a 94 or 93-5 shock??

[washeduptoo]

If your question was directed toward me. We ran the 200 also on rr, a little looser in and car seemed to roll over onto the rr more but it was an 11 inch spring. When we ran the 200 we didn't have as much angle in the spring either(moved perch farther toward wheel). Went to a 225 13inch spring when we moved perch.
We ran a 3030 Bilstein(off the shelf) usually on the rr, I have no experince with those shock numbers.

[cavemod]

the intial question was about body roll and the spring and shocks he"s using tells me that he runs afco or pro or integra out of the box shocks with no custom valving.When I ran a 3 link i tried a pair of 225 on back and the thing wouldn't roll either but when i dropped to a 200 it got some roll and when the track was smooth the 3-5 was better then a straight up 94.I also agree with the angle of the spring will take away rate.This season i will be doing the same as this post 4 bar lr and clamped up rr spring on top with rr shock behind.From what I've seen this is a very succesful setup around here.GRT mods did extremely well with this setup on all types of track conditions the past couple seasons.i believe the 30/30 bilstein is a soft shock comparable to a 93.my point being I think he's to stiff in the rr shock and spring package to get any body roll.How much shock travel are you getting on the rr with the 225 and 95????Does it carry the lf???

[washeduptoo]

My mistake, thought you were directing your question toward me, sorry. You've got good points and we were also successful with the 4-2 set. Best of luck to both of you.

[romeropolo]

The car doesn't carry the l f at all. This what im trying to do.....what change makes this happen....I have integras on the left and pros on the right.....I get around 4 inches of travel on the rr

[romeropolo]

The car doesn't carry the l f at all. This what im trying to do.....what change makes this happen....I have integras on the left and pros on the right.....I get around 4 inches of travel on the rr

Thank you for the info in advance....

[oldtrackchamp4x]

I ran this setup last year and am running it again this year.The car is fast it is a DW-8. This is how my car is setup. LR 250 spring 3r 5c shock for tacky 2r 8c for slick. RR 175 spring, spring should be behind rear end, 3030 low pressure for tacky 5r 2 c for slick. 60-70 lbs LR bite w/o driver. I run the r bar in center hole when tacky, and drop to bottom hole when slick," three hole bracket". My left upper bar is one hole higher than you have yours. Jbar center of pinion with 4.5 in of rake.If all you want to do is hike the lf put bite at 100-110-lbs. with the above setup. If you want to see how the car works go to youtube and search " J D Jurad". Im in the 4x car. Good luck.

[romeropolo]

[QUOTE=oldtrackchamp4x;1379307]I ran this setup last year and am running it again this year.


Man.... that is the info I was looking for. Did you ever try the shock behind the axle on the RR?

[oldtrackchamp4x]

That is where it needs to be. I'm sorry, I messed up and said spring when i ment the shock. Spring on top, shock behind. Let us know how it works. Good Luck.

[xxx8x]

On a 2 link lr spring in front rr on top. whats the best shock in front or behind on rr.OR IS IT DRIVER PREF.

[romeropolo]

I don't know but I am going to go with 70 lbs of bite and shock behind on rr

[washeduptoo]

The shock behind on rr will tighten car up some. Good luck.

[romeropolo]

In the begining of this I wanted more bite coming off the corner...Im not sure if adding 50 lbs of bite and moving the shock behind on the RR will do this....but I am going to give it a shot.....this is ALOT of changes and I dont want to tune my self out of a fast car...

[28m]

Seven words...Put the spring behind on the RR.

You will get the roll that you want and more drive coming off. Dont add the LR bite just yet. Spring on back when on the gas adds more LR bite and drvie.

You will think you have a new car. PROMISE

[xxx8x]

thanks, 28m.

[powerslide]

Seven words...Put the spring behind on the RR.

You will get the roll that you want and more drive coming off. Dont add the LR bite just yet. Spring on back when on the gas adds more LR bite and drvie.

You will think you have a new car. PROMISE

you will have a new car alright. it will have your left front so high up the air you wont be able to see and you will be pushing the nose across the track. this will be compounded if your pullbar travels alot.

[Mosidebite]

Gotta agree with ^. Our Hoffman car was at it's best on the 4-2 with spring on top to keep left front from being up in the clouds. We actually used a little stiffer rr spring, a 250. With a 200 on the left rear. However used a 3 comp and a 5 reb shock to keep it over on the right rear. RR bar angle was critical to our set up, we always had to have 8 degrees in the lower to keep it from leveling out or actually neg degrees and causing a TIGHT on entry thru the center. Also with the stiffer RR spring we used a little lower rear roll center.

[28m]

Question- What changes need to be made to have more body roll to load the RR comming off the corner?

Weird, I thought he was asking how to get more roll?

So let’s say you put the spring behind and your LF is "in the clouds", I would add pre-load to your pull bar, stiffen the spring or switch to a biscuit bar. Since your spring will drop on the RR, you might stiffen the RR spring a bit. This will keep the front down, add spring pressure to the RR adding side bite. The stiffer RR will add drive to that wheel as well. This is good because you will be adding drive to the LR by that spring dropping on the RR.

Another question has to be the type of track you run on. Heavy, slick, banked, flat?