Front end alignment for 70 Challenger

Posted By: jsully

Front end alignment for 70 Challenger - 04/30/10 12:01 AM

Can someone please send the latest new and improved alignment specifications for a 70 Challenger with new MOOG offset upper control bushings?
I replaced every bushing and tie rod end / ball joint. It is a cruiser not a racer. 440 auto and I added disc brakes up front.
Thank you

Posted By: WILD BILL

Re: Front end alignment for 70 Challenger - 04/30/10 12:45 AM

Camber-> 0* plus or minus .5*
Caster-> 2.5* plus or minus .5*
Toe-> 1/16"th in on each side for a total of 1/8" in

Set ride hieght and square rear end if needed first

Posted By: therocks

Re: Front end alignment for 70 Challenger - 04/30/10 11:27 AM

Bills right on.Just hope you can get that much positive caster.My 65 even with the offsets I could get maybe .5 caster.Its manual steering and handles ok with that setting.If it wasnt such a rust bucket Id have bought adjustable uppers.Rocky

Posted By: ThermoQuad

Re: Front end alignment for 70 Challenger - 04/30/10 01:30 PM

I will respectfully disagree:

Camber: 0 to -0.5 preferably -0.5
Caster: + at maximum amount achievable with both being equal not to exceed 6 degrees .

Toe in 0.125"

Check tire inflation
set ride height
square rear if needed
set caster at max amount-rotate the rear eccentrics all the way in and set caster to highest equal positive number achievable.

Dial the camber in with the front eccentric-there may have to be some back and forth between the front and rear eccentrics to get the numbers to fall in. Rotating the eccentric "in" is the "negative" direction.

This is what makes a good front end guy vs someone who follows the bouncing ball on the alignment machine.

Posted By: jsully

Re: Front end alignment for 70 Challenger - 05/01/10 03:21 PM

I appreciate the responses, This was discussed in a thread over a year (or two) ago, so the search does not bring it up. The only conflicting info is with the caster. Is there a reason, e-body vs b or a-body or just preferrance?
Sorry to sound ignorant, this and bodywork are my weak points.
Thanks again!

Posted By: RapidRobert

Re: Front end alignment for 70 Challenger - 05/01/10 03:31 PM

Quote:

The only conflicting info is with the caster. Is there a reason, e-body vs b or a-body

No, you do want as much positive caster as you can get (A b or E) just some cars have a combination of sagged/bent/out of spec when new parts/welds. Get the offset Moog UCA bushings and shoot for as much positive caster as they can get w the camber right and you wont come near going over 6

Posted By: jsully

Re: Front end alignment for 70 Challenger - 05/03/10 03:19 AM

I will adjust (I am assembling car) and take into a shop for the alignment soon. I will post what it winds up being.
Thanks!

Posted By: HealthServices

Re: Front end alignment for 70 Challenger - 05/03/10 04:11 AM

Just make sure when you install the offset bushing the open hole in the front bushing is close to the engine as possible while the rear hole is as close to the wheel as possible

Posted By: WILD BILL

Re: Front end alignment for 70 Challenger - 05/03/10 04:33 AM

These cars were mostly speced for neg caster from the factory so getting any positive caster is a challenge. Doesn't matter which body style it is.

6 degrees positve caster is great for the high speed stability of a drag car but just not needed for a street application.

Camber is a tire wearing angle so if a sacrifice must be made keep camber in spec while mainting equal caster right to left with in at most a 1/2 degree.