WheelsUp84z

iTrader: (14)

I'm about to put a short style tq arm in the car, in hopes it will help out my launches a little better vs the Long style one. My question is, when i set up the pinion angle where would be a good starting point for it? is -2* too much? Car is a full weight (37xx raceweight) M6 car. QA1's w/coilover, 9" with spohn ARB, 28x11.5x15 Hoosier QTP's. The car has solid links on everything accept the forward mount of the TA.

1lejohn

iTrader: (9)

I would shoot for -1 or zero(neutral). Do a search in the suspension section this has been discussed alot.

Tally TransAm

iTrader: (17)

i run -1

Timmy P

iTrader: (3)

-1 is where we usually start out at. Different track yeild different changes.

brandoz28

iTrader: (3)

-1 or -2. with all solid stuff it shouldn't move around too much really

WheelsUp84z

iTrader: (14)

Thanks, but just to clarify, you are speaking of purely Pinion angle in relation to the ground right? not in relation to the driveshaft angle? I dont care much about drive line angle (as i've read most every madman post on PA)

1lejohn

iTrader: (9)

Thats the way I understand it. As long as the shaft and rear aren't in a bind it really doesn't matter.

tim99ws6

iTrader: (31)

got relocation brackets? how's your drag bar? Why didnt the previous long bar work? What was your setup on it?

tee-boy

iTrader: (8)

this is the way I see it.

you want the arm to be in line under acceleration. In other words you want the arm to travel upwards by a distance that will allow for the driveshaft to be in line with the pinion and the output shaft of the transmission.

When a short arm travels 2 degrees it travels a shorter distance (ark distance)
compared to:
When a long arm travels 2 degrees it travels a longer distance (ark distance)

2 degrees is 1/180th of a revolution.

Therefore, it seems a short arm will need more pre-set (measured in degrees) at rest than a long arm, all else constant. However, a short arm is located further to the rear of the chassis where the magnitude of chassis movement is different than that compared to any point forward. Compare the distance in magnitude of chassis movement rear to forward to the difference in vertial movement of the short vs. long arm. Negate any difference by adjusting the pinion angle.

Any change in slope of the LCA would change the magnitude of chassis movement.

A solid chassis mount on a torque arm will allow less room for error.

1lejohn

iTrader: (9)

Here you go

http://madmanandcoracing.com/Install_instructions.html

WheelsUp84z

iTrader: (14)

Yes I have relocation brackets. My drag bar is the bolt on one from Spohn, with the solid links. Its not that the previous one didnt work, Its just that i wanted to try a short style one, more of a race type setup. I had the BMR long style with the relocation crossmember. I had the front at the 2nd highest set of holes, and the pinion angle anywhere from -3 to 0 trying things out. This is more of a test to see if the short one will work better or not.

Thank you! thats probably what i'm going to do.

Makes sense. I'll just go off of the Madman reccomendations and go from there.

mike c.

iTrader: (1)

I have a neg-2.