Pinion angle
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,072
From: Lansing MI
That's kind of an unusual question, but I seem to remember not more than 3 degrees and within a half degree of each other has always been pretty standard on any rear wheel drive car. Obviously the trans angle will need to be negative and the pinion angle will need to be positive, so they cancel each other.
Last edited by PatternDayTrader; Mar 17, 2019 at 10:18 PM.
Le Mans Master
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
The C4 uses IRS so pinion angle can be zero The batwing won't support the front of the diff so it will need a bracket.to hold it in place.The engine and transmission height and angle along with driveshaft length are factors. The engine and transmission should be sitting close to zero or slightly down in the rear..Ideally transmission angle will match pinion angle. The driveshaft angle should be 3 +/- .5 degrees and the working will be equal.
Team Owner
Joined: Sep 2003
Posts: 25,366
Likes: 2,732
Whose chassis are you trying/attempting to replicate? SRIII or........................ maybe not even restmod but other than.
The C4 rear in any chassis I've seen is pinion nose at 0 ... no up/down. A bracket since it's assumed you don't have a C-beam to control that. You can control pinion 'height' by altering the cross-member used for the rear cover mount and bracket that mounts the nose. It would seem that you'd control drive-line angle by transmission cross-member adjustment to create an ideal drive-line angle.or alter the height of the rear cover and pinion bracket.
As mentioned length of drive-shaft creates the variances.
A restormod isn't maybe a very good description of what you're creating. Wheel base of whatever is maybe relevant.
This is a generally considered a good read
https://shiftsst.com/articles/driveline-angles
***If you had a couple degrees of 'nose up' on the pinion you could always use a shim if needed to drop that. Some have an adjustable mount.
*** forgot to mention that half-shaft orientation needs to be considered in the mounting and calculations.
*** there are certainly limits!
The C4 rear in any chassis I've seen is pinion nose at 0 ... no up/down. A bracket since it's assumed you don't have a C-beam to control that. You can control pinion 'height' by altering the cross-member used for the rear cover mount and bracket that mounts the nose. It would seem that you'd control drive-line angle by transmission cross-member adjustment to create an ideal drive-line angle.or alter the height of the rear cover and pinion bracket.
As mentioned length of drive-shaft creates the variances.
A restormod isn't maybe a very good description of what you're creating. Wheel base of whatever is maybe relevant.
This is a generally considered a good read
https://shiftsst.com/articles/driveline-angles
***If you had a couple degrees of 'nose up' on the pinion you could always use a shim if needed to drop that. Some have an adjustable mount.
*** forgot to mention that half-shaft orientation needs to be considered in the mounting and calculations.
*** there are certainly limits!
Last edited by WVZR-1; Mar 19, 2019 at 05:18 PM.
