Do you think going to 24" rear control arms (from 19 1/4" long) will help or hurt in a drag racing car. I need to make new ones for the mini tub I just did on my car and now is the time to change if ever.

Jerry

 

what's the logic by adding 4.75" to the control arms? won't it shove the rearend so far back that the tires will rub, and the torque arm won't hook up?

too many fast guys are running serious numbers on stock length (or close to stock length) lca's with lca relocation brackets and a good aftermarket torque arm.

 

I think he maybe talking about relocating the pick up point at the frame......longer bars would have more effective leverage, I`m not sure if it would be worth while though.

 

i'd pass, if it was worthwhile, others would have done it and it would have caught on in the drag radial classes. As it is right now the stock type suspension setup has gone 1.2s in the 60'

 

WOW thats a good one....

I just mini tubed my car and can get more tire clearance if move the front mount inboard. The area inboard next to the stock mount is open more forward then the stock mount so you can go forward to a 24" long control arm or down to a 16" long arm.

Just asking if anyone has tryed this, Maybe someday you will see a 1.1 60' car with moved front mounts forward and long arms. Or someday we will all be running 15" arms and moving the mounts back.

So fast guys long, short or is 19 1/4 the perfect number to use.

Jerry

 

i'd need to read a lot more chassis setup books before I could even offer a suggestion on what they would do to I/C among other things.

 

you didn't say that you'd be moving the front mounts foward, i see what you're saying now, but you don't have to be a douche to me just cause you didn't specifiy that you were moving the mounting point on the front.

 

thats easy, it wont change the instant center. If the suspension moved alot it would change the rate at which the rear moved fore and aft in travel, but short of a dirt circle track car most car suspensions dont move far enough for that to affect much, it may make clearance for more tire though, if one were to move that bracket but it would be a pretty serious move there, and I dont know if you would need a tire with that large a diameter. when setup correctly, a torque arm car simply pushes the car with the lower arms, if they are too high or low they will make the car do things you may not want. I do not know what you mean by fast, that is kind of nonspecific, to some 12's are fast, 10's are crazy, so maybe you should be more specific when you say that, but murphy and newton still have pretty valid points, and nobody has disproven them yet that i know of.

 

won't change instant center if the LCA is at an angle in relation to torque arm?

 

you could put them vertically, the point at which the front of the torque arm is attached is where it will lift, the only thing you would change is anti squat (or pro squat) I probably should not have started this lol.

 

this is why i don't mess with the stock geometry and just smile that it works for me.

 

I changed it a little, and with 60 foots in the 1.20's on the rear wheels with a 3200 + car, im happy, i guess i could lighten it up alot, like cut the roof off, leave the driver out, and a few other things to make it lighter, and maybe i could hit 1.1's lol

 

agreed...you are leaving a good amount on the table. If your track mounted the 60 lights about 4' in the air I`d bet you would only need to cut the roof off