Engine Placement

[billetbirdcage]

I look at it a little differently. It is just a weight mass that needs to transfer, but I look at it like on an arc. If the motor is left of the theoretical roll center it will have to travel in an arc over the top of the roll center before it begins traveling downhill to the right.

That's fine if the engine was the entire COG, but it isn't. Would it really matter between these 2?

1. Engine left 4" and 20# on right frame rail to make COG on centerline of car
2. Engine right 4" and 20# on left frame rail to make COG on centerline of car (say this is exactly the same COG as #1)

Is there really a difference? It's the COG that matters not the location of one item that makes up the total COG. If you had said COG instead of engine I would agree.

[ZERO25]

That's fine if the engine was the entire COG, but it isn't. Would it really matter between these 2?

1. Engine left 4" and 20# on right frame rail to make COG on centerline of car
2. Engine right 4" and 20# on left frame rail to make COG on centerline of car (say this is exactly the same COG as #1)

Is there really a difference? It's the COG that matters not the location of one item that makes up the total COG. If you had said COG instead of engine I would agree.

If you dropped a plumb bob off each lower balljoint and found the centerline, would the centerline of the engine line up with that mark? Or does each chassis brand have their own preferred mounting position?

[Ltemodel]

Yea Billet, I think you are right. It is more about COG. I guess I never thought about someone balancing a right motor shift with left hanging lead. Good call!

[Austin34471]

That's fine if the engine was the entire COG, but it isn't. Would it really matter between these 2?

1. Engine left 4" and 20# on right frame rail to make COG on centerline of car
2. Engine right 4" and 20# on left frame rail to make COG on centerline of car (say this is exactly the same COG as #1)

Is there really a difference? It's the COG that matters not the location of one item that makes up the total COG. If you had said COG instead of engine I would agree.

This is above all of our pay grades other than maybe Ghopper, but I wonder if moving the torque axis centerline that far would have any noticeable effect?

[Ghopper]

The further left the engine, the more angle introduced in the driveshaft alignment at full droop. Getting idealistic in here!

The CG moves about 0.500” left for each 1” of engine movement. You can figure that percent with a ~72” track width. The heavy driver can move it about 1.5” left vs a lighter driver.