1fstGM

iTrader: (13)

What does your suspension look like? What shocks, springs, sway bar, LCA, Tires, Gears, Panhard rod, TQ Arm, subframes etc...

DMH Fabrication

iTrader: (126)

Check out the latest edition of GMHT and there is a good write up on Madman's suspension parts with the before and after test. That should help point you in the correct direction. Also you can look through the past threads in the drag section where this has been discussed before.

1fstGM

iTrader: (13)

Cool. Will keep looking. Thanks!

Nine Finger 02 Z28

iTrader: (11)

My 02 Z28 has all of the best that Spohn makes...I cut 1.33 60ft on a 30x12.5 Et Street...I know to some may think that a 1.33 60ft is nothing special...But I think it is for being on a Junk Et Street...lol...

tektrans

iTrader: (23)

BMR k member and lower a arms, stealth stock lengh torque arm and adjustable panhard bar, spohn drag sway bar, tubular non adjustable control arms (G2 beleive it or not) and qa1's all around.
Goodyear 28" D3's. 1.32 is my best 60' to date.

rtk434

iTrader: (1)

My car is all Spohn in the rear. It has a PA kmember and arms up front. Koni spa1 struts and strange shocks. It 60 foots in the high 1.2's all day long on drag radials.

kp

iTrader: (34)

SA strange front shocks, QA1 300lb springs, PA k-member/UMI lower A-arms.

Random Tech torque arm, BMR TA relocation crossmember.

UMI PHB/LCAs and LCA relocation brackets, Spohn drag rear sway bar, CE three way rear shocks.

1.25-1.28 60's in good weather, 1.29-1.32 in the middle of summer on 10.5x28 ET drags. Cant get much simpler then that..

JL ws-6

iTrader: (50)

KP what holes do you have the tq arm mounted to on the bmr crossmember? I have the same piece, and was thinking of moving it, but knowing where a good hooking car has it would help.

kp

iTrader: (34)

Here is a pic, worth a thouasnd words I guess. Moving it has little effect really since it 'floats' in the bushing and doesnt push the car forward.

If it was solid mounted in front then it would make a big difference

JL ws-6

iTrader: (50)

instant center adjustment. You have it one hole lower then I have mine now from the looks, I have to look @ the photo when I get home on a better screen to tell for sure.

kp

iTrader: (34)

Lot of bad information on how these cars work floating around lol. Dont be afraid to try anything though, its the only way to learn.

SScam68

iTrader: (20)

how so?

gator's 99TA

iTrader: (2)

b/c the front mounting point wouldnt move in relation to the cross member.

kp

iTrader: (34)

Plenty of reading about it on the internet

Its been beat to death here many times, torque arm suspension is not a ladder bar or a 3 link..

SScam68

iTrader: (20)

I know, and I also understand the technical difference between a TA and a 3 link.

I just finished up designing new links for the Spohn chassis torque arm.



That one has a 3000lb load on it and well over a safety factor of 1.

What I don't know is how senstive the suspension is to a different mounting point. I've looked at the geometry and what I have yet to work on how the suspension reacts to the same load, but different mounting point. This is assuming the same pinion angle. I'm getting there though...

And yes, I can search the net easy enough but as you put it.

Just curious what your take was on it considering the parts your running.

onfire

iTrader: (17)

That would make a difference in a Madman torque arm where the front point is fixed. Spohn, BMR and all the slider mounts are not fixed. Look at a pic of a Madman TA and you'll see the difference.

JL ws-6

iTrader: (50)

so if the front point of the arm is not fixed, raising and lowering the front poitn doesn't matter?

SScam68

iTrader: (20)

Yep, I've looked at Wolfe's, Burkhart's and Madmans, Madmans is the only one with a rigid mounting point. I believe that's the reason for the dual buckles.

Here is a diagram I doodled up. It's not to scale but you get the idea.


So, you're right JL. ASSUMING the link stays in a vertical position the IC doesn't change in a static position. Is this the case during a run? Because of the way the housing torques up into the car on launch, and because it pushes against the LCA's I'm inclined to think that link tilts towards the back moving the IC. Because Madmans is rigidly mounted this isn't the case, and I'm wondering if that's why it's designed that way.

Someone correct me if I'm wrong.

Although the IC might not change, there is a change in geometry and a change in dynamics. But how dramatic is it? This will help me finalize the hole spacing before I send off the parts to be cut.

Just a n00b trying to understand.

onfire

iTrader: (17)

It's the same as taking a string with a pencil on one end and a pushpin on the other end. Stick the pin in a piece of cardboard and you can draw an arc or a complete circle with the pencil.

Start moving the pin around and now the arc starts changing locations...just like a Spohn,BMr, slider, etc....which isn't a bad thing...just a different way of setting the suspension up....and since the pivot moves...no significant reason to adjust it up or down.

JL ws-6

iTrader: (50)

I have seen the way a madman tq arm works... and I can't see why that is any different then putting a stock tq arm on a bmr crossmember and moving the arm up and down. It should effectively do the same thing as moving his arm up and down on his mount to adjust the instant center.... maybe I'm still misunderstanding something I dunno.