Thread: pinion angle and ladder bar setup?

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Here is a drawing i have made, sorry it sucks, wondering what the pinion angle should be in relation to the driveshaft, the ground, ladder bars?

with the lower bar level to the ground i run the pinion down 2/3 deg down

I'm with Pat, 2 to 3 down.

Simple answer to lower bar position initial setup.

Draw a line from tire contact patch throught athe C/G Center of Gravity calculated height. adjust the front pivot point to intersect that line. engine HP and bar length will dictate how hard you shock the tires, then adjust up to down to get best launch and 60'.
Use your upper rear adjustment to get pinion angle.
John

thanks for all of the help guys, i am going to stick with the ladder bars as it is somewhat of a budget build and i am not moving the frame rails and will be running 10.5'' street tires

Hey dave severson, 10,000 posts? dang thats alot

denny, 11,000 posts ? WOW

Originally Posted by gottabuild1

Hey dave severson, 10,000 posts? dang thats alot

I've been here awhile.....

What kind of springs are you using? If they're leaf springs, you'll need sliders to keep from binding up the rear suspension.

BTW, Dave started posting back when computers were kerosine-powered.

wondering what the pinion angle should be in relation to the driveshaft

The pinion angle is a function of the tranny output shaft angle.
If the tranny is down 2 degrees, the pinion should be up 2 degrees.

Typical universal joints are designed to operate within 3 degrees of offset.
Any angle beyond that may cause binding.

An angle of 0 will not cause the u-joint needle bearings to rotate as they should upon proper installation.

BTW, Dave started posting back when computers were kerosine-powered.

I'm pretty sure Dave had an Eniac account in 1955.