Pinion Angle Question
05-28-2007, 08:04 PM
#1
Pinion Angle Question I am looking for the best traction that i can get, i have an UMI adjustable trq arm, what should i set the pinion at? Side note is -2 mean the torque arm and driveshaft is facing down like a v with the point in the middle facing down or is it facing up. Reason i am asking is a buddy of mine that has a built drag car says that negative is up and positive is down, and i thought it was the other way around.
Thanks Ryan
Thanks Ryan
05-29-2007, 01:04 AM
#3
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I never see anyone discuss the difference between
setting pinion angle by the pumpkin and setting it at
the nose. But this is key.
What you are trying to do for traction is change the
instant center rearward and down. The rays from the
LCAs and the TA intersect and if you lower the TA
nose it does the job. Or something.
Changing the pinion angle at the pumpkin does not do
this. The -internal- angle of the pumpkin-TA assembly
changes but the link geometry as a whole, as relates to
instant center, doesn't much.
I believe the ideal is to have the relocating crossmember
up front to dial the instant center, and the adjustable
out back to reclaim proper -driveline- angle at the end of
it all.
setting pinion angle by the pumpkin and setting it at
the nose. But this is key.
What you are trying to do for traction is change the
instant center rearward and down. The rays from the
LCAs and the TA intersect and if you lower the TA
nose it does the job. Or something.
Changing the pinion angle at the pumpkin does not do
this. The -internal- angle of the pumpkin-TA assembly
changes but the link geometry as a whole, as relates to
instant center, doesn't much.
I believe the ideal is to have the relocating crossmember
up front to dial the instant center, and the adjustable
out back to reclaim proper -driveline- angle at the end of
it all.
