Quote:
Originally Posted by rod
the ? remains, except for you guys with mega $$ and a go pro camera mounted under the car to view movement...how do you know what the pinion is really doing. every car is different even if it is the same car [1 67 Camaro next to a duplicate 67 Camaro]
just because 1 guy says 4 degrees down tells you absolutely nothing. so the pinion is 4 degrees down, down from what, the ground?
the difference is between the pinion and the driveshaft. if the pinion is 4 down and the shaft is 4 down, then you have 8 degrees. [and y7ou could still have 0 to 1 degrees at the tailshaft] loss of hp, and a broken U-Joint in your future.
spring packs are different in stiffness. spring pads are different [most only a bit longer than housing dia. and therefore, offer very little resistance to movement]. shock position [front or rear of axle] shock stiffness [front or rear], tire size and width, tire pressure, launch RPM and launch hp,track traction and probably several more things cause pinion angle to change at launch. and how long will it stay.
all in all, be careful about making general statement about someone elses pinion angle.
Rod in AZ
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The posts in here say Cal-Trac wants the pinion down 2 to 4 degree's. Down means down. That's not your pinion angle, the pinion angle is determined by the degree up or down the output, or in other words centerline of the crankshaft is adjusted.
This is where you're getting confused, Cal-Trac doesn't specify pinion angle, only they want the pinion down. This is to get the shaft of the damper exiting the shock/dampers main body with the shocks fixed on the backside of the rearend housing, at the drop.