Ummmm… no. Another misguided Z32 owner, you guys must live in a bubble where simple physics do not apply.
I am looking to optimize my power to weight, tire to weight, and brake to weight ratio.
if added in the righ spots it could be helpful…in the case of the lambo drop top it would be more towards the center/rear of the car which for traction purposes could be helpful but overall with hinder handlling…of course is added to the front in theory it would help grip on the frotn tires but also hinder turn-in and braking performance
i agree with everyone in that in racing applications, weight does make a huge difference. this i kno. my original question/point in this thread was to say that for every-day driving that we all do around town in our cars that serve mainly as our everyda car that can go a little quicker when we want (not a fully dedicated race car) does an extra coupple hundred pounds really make a difference for an everyday car? perhaps i didnt outline that proporly in my orignal statement.
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I was going to but, instead I said…
“You can talk physics all you want but, 50 Cent, Busta Ryhmes, etc don’t give a flying fuck about that 300#s and that is who is buying those cars.”
Anyone with half a brain knows that lighter and lower is better and less rotating and unsprung mass is better.
And it is all about percentages and ratios but, who cares when it comes to Lambos?
again, go put 300lbs in your truck and drive around. Watch your MPG drop, your handling get shittier, your braking get shittier, etc. Yes 300lbs makes a difference.
i did not go into detail about turning or braking the car, just simply straight line speed. trying to keep it simple
A couple HUNDRED pounds? YES. YES YES YES YES YES YEEEEEEEEEEEEEEEEES.
Huge difference. As in, FUCILLO huge.
You’re trying to focus on a DD vehicle, right? Okay:
Forget acceleration…
Forget weight transfer…
Forget braking distances…
Forget tire wear…
Forget Suspension design…
Forget Fuel mileage…
Forget turning ability…
Forget ride quality…
Forget engine load…
Forget transmission load…
Forget brake wear…
Then, and only then, will 300#s not matter.
It’s not just about going a little quicker. Its also (and more importantly) about being able to make an emergency stop in 7am thruway traffic; and pitching suddenly out of your lane to avoid a small child -or- Zer0daze; and filling up at the gas station; and making brakes last an extra 5000 miles; and so on…
Not even accounting for weight distribution. I think You need to grasp the basic concept before we even touch the distribution concept 
-Nick
i dont think the 100 lbs = .1 seconds in the quarter theory/formula holds true for all cars, like i said earlier…the lighter a car is, the bigger the difference seen will be…and the heavier a car is, the less you’ll notice the difference by reducing weight…
an extreme example of this would be…
you have a 5000 lb truck, you take off 200 lbs, you will probably not be able to feel any difference at all…
you have a 1800 lb lotus elise, you somehow find a way to take off 200 lbs more…you’ll feel a HUUUGGEEEE difference…
thus proving that 100 lbs does NOT always = .1 seconds off the quarter time…
You are leaving out a part of the equation
you take a 5000LBS truck with 300HP/300FT/LBS
and you take an 2000LBS elise with 300HP/300FT/LBS
And you shave off 300LBS, you will see just as much as a different in original then shaved 1/4 mile time. Assuming everything on them are the same (drivetrain loss, drag, yada yada).
This is just straight line.
But I know what you are getting at. A car with less HP and TQ that pulls around less weight is going to suffer more with a 200lbs addition than a car with more HP and TQ but more weight. Meh, I think you’ll still notice it. I noticed it when I had one 175lbs passenger in my Jeep. I too notice it when someone was sitting in my stook, with his 200lbs of shit crammed in my trunk too.
and 100lbs = .1 sec is a general rule of thumb.
Like I said in post # 25 it is all about percentages.
If it is like throwing a deck chair off The Titanic it won’t make a lick of difference because a 5# chair is a small percentage of a million # boat.
its all in the doors duh lol