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Need a little advice and or experience !
The class I run in made a rule change this spring. I just getting my new engine together and want to take full advantage of this rule change.
Instead of a short anti-axle wrap device we are allowed to run a bar (ladder bar) any length in any direction from the axle, one per wheel.
Here is my plan:
I want to attach the bar about 3" below the rear axle tube center line with a good strength mount and attach it to about where the front U-Joint on the rear driveshaft comes out of the transfer case to the frame. I think that the ladder bar has to be somewhat parallel with the ground so the frame mounts will have to have a few holes for adjustment. I will use some sort of heavy duty Hiem joint so as to not bind the suspension.
I guess the question is how long do I make the ladder bar to allow weight transfer to rear and some lift on the front ? Do I need to get the truck to a scale and find the instant center and such or can I get a close with a guestimate from you guys to make this work or get a measurement from one of you. I am using Rancho 9000 shocks on rear now and the AFCO 90-10's on the front. The rear springs have been cut short behind the rear axle to allow some squat. Is this enough info for now ?
The truck is a 79 F-150 4x4 short box, strictly mudrace fast track type pits.
Thanks Mark
The class I run in made a rule change this spring. I just getting my new engine together and want to take full advantage of this rule change.
Instead of a short anti-axle wrap device we are allowed to run a bar (ladder bar) any length in any direction from the axle, one per wheel.
Here is my plan:
I want to attach the bar about 3" below the rear axle tube center line with a good strength mount and attach it to about where the front U-Joint on the rear driveshaft comes out of the transfer case to the frame. I think that the ladder bar has to be somewhat parallel with the ground so the frame mounts will have to have a few holes for adjustment. I will use some sort of heavy duty Hiem joint so as to not bind the suspension.
I guess the question is how long do I make the ladder bar to allow weight transfer to rear and some lift on the front ? Do I need to get the truck to a scale and find the instant center and such or can I get a close with a guestimate from you guys to make this work or get a measurement from one of you. I am using Rancho 9000 shocks on rear now and the AFCO 90-10's on the front. The rear springs have been cut short behind the rear axle to allow some squat. Is this enough info for now ?
The truck is a 79 F-150 4x4 short box, strictly mudrace fast track type pits.
Thanks Mark