Chris’s 2007 SS/SC track frame build for autocross

[ccannx]

Next I popped the driveshafts out disconnected the wiring from the trans and disconnected the shifter cables.

 

[ccannx]

I strapped the engine to the rear bar loosened the engine and trans bolts and loosened the fuse box to get at the transmission bolts. I also removed the exhaust and placed a transmission jack under the trans before disconnecting the rear subframe.

 

[ccannx]

I moved everything over to the new trans and installed the new throw out bearing that came with the clutch upgrade kit.

 

[ccannx]

Old clutch and flywheel vs new. Old clutch almost looked warped from a side view.

 

[ccannx]

Put the new flywheel in and mated the trans with little fuss. Then put 2 quarts of redline fluid in the trans. Still need to replace the lost brake fluid and put the muffler back on.

 

[ccannx]

Finally finished fabrication of the front swaybar.

 

[Waterdriver]

Looks like nice clean installation!
What size bar did you decide on? Hollow or solid?

 

[George]

What is the wheel rate?

Brad

 

[ccannx]

Don't know the wheel rate, how do I figure that out ? Its mounted halfway down the control arm so its not going to see a whole lot of flex

Its this 1 inch hollow bar https://www.jegs.com/i/Ross+Pistons/794/19-0001/10002/-1?gclid=EAIaIQobChMInf_GuL-d6AIVFm6GCh3LcQg-EAQYAyABEgJZoPD_BwE

 

[George]

I will calculate it tomorow . Need to know distance from center of lower heim and where sway bar mounts to arm
Also length of arms on swaybar.

Brad

 

[ccannx]

Center for lower heim to the arm is 1.5 inches. Center of lower heim to swaybar arm mount is 2.0. the mount rests 7.5 inches from the inner heim that mounts the lower arm to the frame. The total swaybar arm length is 6 inches from end to end but the center of heim to center of swaybar is only 4.8 inches.

 

[George]

I calculate the wheel rate to be 590 pounds per inch of wheel travel. Very stiff. Car should push.
Brad

 

[ccannx]

What would be the change if I added another inch to the swaybar's arm length?

I'm running 150lb front springs and a square tire setup. Hopefully will get to do some testing weekend after next if it doesn't get canceled by the Covid19 problem.

 

[George]

A 1" longer arm would lower it to 405 pounds per inch. Even with 400#front spring my car bottoms out when braking during autocross. Do you have the newer lower "L" brackets for the lower heims?
I run 500# spring s in front.

Brad

 

[ccannx]

A 1" longer arm would lower it to 405 pounds per inch. Even with 400#front spring my car bottoms out when braking during autocross. Do you have the newer lower "L" brackets for the lower heims?
I run 500# spring s in front.

Brad

They are really soft I had to set an inch of preload. I do have the new L brackets

 

[ccannx]

Printed out a turn stalk mount to relocate it further forward. I kept hitting the stalk every time I got in and out of the car. Now all is well.

 

[jpr]

Do you have the newer lower "L" brackets for the lower heims?

Did they end up making beefier ones? I bent mine pretty badly last year.

 

[George]

Yes 3/8 inch compared 1/4

Brad

 

[ccannx]

I made a smaller swaybar after trying the big beefy one on and immediately breaking one of the end links.

This one is another 36 inch bar but 3/4 thick with a .095 wall thickness and adjustable 6 inch long arms.

 

[ccannx]

Yes 3/8 inch compared 1/4

Brad

Nope ! I don’t have 3/8ths ! Passenger side is bent also drivers side is starting. This is unfortunate.