Anyone knowledgeable on weight transfer?
Thread Starter
Instructor
Joined: Oct 2014
Posts: 195
Likes: 11
From: Glendale Arizona
Anyone knowledgeable on weight transfer?
On my 2010 C6 GS Convertible, I recently added an Edelbrock E-Force which added 90 lbs to the front weight. I removed the front battery that weighs 35 lbs and added a larger battery in the trunk that weighs 50 lbs. I just assumed that the wight transfer was (+90, -35, -50) for a net of +5 lbs to the front. However, I'm told it's much more complicated than that, so can someone please educate me.
Thanks!
Lew Shaw
Thanks!
Lew Shaw
Drifting
Joined: Sep 2009
Posts: 1,305
Likes: 80
From: Hollister CA
On my 2010 C6 GS Convertible, I recently added an Edelbrock E-Force which added 90 lbs to the front weight. I removed the front battery that weighs 35 lbs and added a larger battery in the trunk that weighs 50 lbs. I just assumed that the wight transfer was (+90, -35, -50) for a net of +5 lbs to the front. However, I'm told it's much more complicated than that, so can someone please educate me.
Thanks!
Lew Shaw
Thanks!
Lew Shaw
Le Mans Master
Joined: Sep 2004
Posts: 5,118
Likes: 122
From: Madison (Huntsville) Alabama
CI 6-7-8 Veteran
St. Jude Donor '09
You have 90(front) - 35(front) + 50(back). You added 55 lbs to the front and added 50 lbs to the rear. Your car now weighs 105 lbs more overall, with 5 lbs more of that in the front, so it's balanced almost as before but the car is about 3% heavier.
What about the extra length of battery cable? Isn't that a lot heavier for the rear battery? I realize it's probably fairly evenly distributed front to back, but it'll make the car even heavier because of its added mass.
What about the extra length of battery cable? Isn't that a lot heavier for the rear battery? I realize it's probably fairly evenly distributed front to back, but it'll make the car even heavier because of its added mass.
Drifting
Joined: Jan 2014
Posts: 1,345
Likes: 32
From: Arlington Texas
It may be a little more complicated, because you slightly changed the center of gravity and the moments of inertia about it. But the effect is probably negligible. Such things happen with carrying passengers, adding fuel, or putting a case of beer in the trunk.
Anyway, the only real difference you'll notice is the Edelbrock. Have fun!
Anyway, the only real difference you'll notice is the Edelbrock. Have fun!
Thread Starter
Instructor
Joined: Oct 2014
Posts: 195
Likes: 11
From: Glendale Arizona
Thread Starter
Instructor
Joined: Oct 2014
Posts: 195
Likes: 11
From: Glendale Arizona
You have 90(front) - 35(front) + 50(back). You added 55 lbs to the front and added 50 lbs to the rear. Your car now weighs 105 lbs more overall, with 5 lbs more of that in the front, so it's balanced almost as before but the car is about 3% heavier.
What about the extra length of battery cable? Isn't that a lot heavier for the rear battery? I realize it's probably fairly evenly distributed front to back, but it'll make the car even heavier because of its added mass.
What about the extra length of battery cable? Isn't that a lot heavier for the rear battery? I realize it's probably fairly evenly distributed front to back, but it'll make the car even heavier because of its added mass.
Thread Starter
Instructor
Joined: Oct 2014
Posts: 195
Likes: 11
From: Glendale Arizona
It's best to keep the mass of the car between the front and rear axle lines. Putting weight near the bumpers makes a more leveraged lateral swing-out force.
I wouldn't go to a heavier battery. And in fact if heated seats, high amp stereo, and high beam headlights are avoided then the Braille 21 pound battery would be enough.
I wouldn't go to a heavier battery. And in fact if heated seats, high amp stereo, and high beam headlights are avoided then the Braille 21 pound battery would be enough.
Thread Starter
Instructor
Joined: Oct 2014
Posts: 195
Likes: 11
From: Glendale Arizona
It may be a little more complicated, because you slightly changed the center of gravity and the moments of inertia about it. But the effect is probably negligible. Such things happen with carrying passengers, adding fuel, or putting a case of beer in the trunk.
Anyway, the only real difference you'll notice is the Edelbrock. Have fun!
Anyway, the only real difference you'll notice is the Edelbrock. Have fun!
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