Pinion angle

[rob2078]

I've been told that my rear pinion is too far up in relation to the trans.I have about 2 degrees up from the angle of the trans.
This is with the car on jacks.How will this change when I put the ca to the ground?
Bob

 

[ellis8500]

Your measurements should be taken with the car on the ground and at driving weight. Use the driver and 1/2 tank of gas to get an average weight. Then, set the pinion angle to be the same up degrees as the engine down degrees. If engine is 3 down, set pinion 3 up. Of course it will change a little as the weight changes but will be working in a range the is a +/- from the "Perfect" angle. Hope this helps. And if someone thinks this is wrong, please, please let me know because this is what I plan to do.

 

[rob2078]

Your measurements should be taken with the car on the ground and at driving weight. Use the driver and 1/2 tank of gas to get an average weight. Then, set the pinion angle to be the same up degrees as the engine down degrees. If engine is 3 down, set pinion 3 up. Of course it will change a little as the weight changes but will be working in a range the is a +/- from the "Perfect" angle. Hope this helps. And if someone thinks this is wrong, please, please let me know because this is what I plan to do.
Thankyou Bill.Sounds like solid info.
Bob

 

[Screaming Metal]

Pinion angles....here we go.... just gotta do it one time.... .... lets do a search on this and se what happens..... Ha!

 

[Ted Brown]

I have always set the pinion angle the same as the crank angle, because with my long rear radius rods, the pinion does not ever change much to speak of at all... So when the chassis moves up or down, everything moves just a bit off in either direction and comes back to straight while driving normal...
drive safe :rofl:

 

[rob2078]

I have always set the pinion angle the same as the crank angle, because with my long rear radius rods, the pinion does not ever change much to speak of at all... So when the chassis moves up or down, everything moves just a bit off in either direction and comes back to straight while driving normal...
drive safe :rofl:

Thank you for the info!
Bob

 

[sstock]

I have always set the pinion angle the same as the crank angle, because with my long rear radius rods, the pinion does not ever change much to speak of at all... So when the chassis moves up or down, everything moves just a bit off in either direction and comes back to straight while driving normal...
drive safe

Sounds like another reason to consider the longest radius rods you can fit on the frame

 

[Ted Brown]

Sounds like another reason to consider the longest radius rods you can fit on the frame

Just remember to build them plenty strong, I think RPM builds a strong set... Drive safe