drbru001

Hi all, Im hoping someone can help me answer a question. I am contemplating an interior modification that will add roughly 100lbs to the weight of the car evenly spread throughout the floorpan and rear hatch area. My question is about speed. By adding the 100lbs how much slower will my car perform 0-60, for example. Also, if I want to counteract the increase in weight, how much horsepower will I need to add to compensate and bring the performance back? Thanks all.

boblackhardtop

100lbs=10hp

drbru001

Much appreciated.

Sub Driver

What type of interior mod?

Madsen

My guess in a sound package? 100 pounds is allot of weight for that.

Just guessing

drbru001

complete, over the top, sound and heat insulation. It goes beyond what is found in the threads on this forum. I have to weigh the performance loss with the benefits of quietness and audio performance. I appreciate all the feedback. This weight is before any increase in audio gear by the way.

383vett

Rule of thumb in drag racing is 100 lbs adds a tenth to the quarter mile time.

C7/Z06 Man

They say reducing "rotating weight" by 10 lbs. has the same effect as reducing a cars weight by 100 lbs. (100 lbs. = 1 tenth) rule of

So if you got some wheels and/or tires that reduce the rotating weigh by 10 lbs. you may recover the lost performance.

That's why on paper a Z06 with the approx. 22 lb. lighter CC rotors may be a tenth or two quicker in the 1/4 mile over a regular steel rotor Z06.

Personal Example: I borrowed a lighter set of rear wheels/tires at the track for my 2010 Grand Sport one time. My 60 ft. stayed the same from the one pass to the next pass with the lighter set of rear wheels/tires but I picked up approx. a tenth and 2 mph in the 1/4 with the lighter rear wheels/tires.

Fastmikefree

100lbs? A top model???

Z06Norway

Going the wrong way when in the same sentence mention performance and weight increase.
Everybody else talking performance is talking about reducing weight, Z06 is heavy

Just adding HP might give you back acceleration but handling NOT.

But each to his own i guess, so best of luck with your project and let us know how it worked out...

mdiiulio

You haven't looked hard enough. I have a pretty detailed thread on sound deadening, insulation, and vibration dampening, but I did stop shy of 50lbs.

3 Z06ZR1

IMO
NO the car is almost too heavy as is. Another 100 pounds?
Like 2 people all the time. Can't counter act it there is a penalty
of some effect. Remember this is a performance car!

stevebz06

Are you only a drag racer or do you go around corners as well?
All the answers you have received address only straight line acceleration. The weight will affect braking and cornering as well.
It would be complicated to calculate the total additional lap time penalty, but I have seen interviews with the Z28R drivers who were complaining about the weight penalty for winning too much having the effect of making it impossible for them to race aggressively. They were reduced to just driving around waiting for a lucky break.

But I would think that if you were placing your priority on track performance, you wouldn't even consider adding this much weight to the car, so why even worry about it?

6104696

You can't have one car that will be a quiet luxury GT machine, AND a *****-to-the-wall race car. Pick one, accept compromise, or buy two cars.

drbru001

Im clearly in the compromise camp. however that doesnt mean I cant learn what my checks and balances are and make modification decisions based on the information I am trying to acquire. I dont track the vehicle, or at least I havent yet. So I havent caught that bug...yet. But the majority of driving I do regardless will be on the street. I just need to make sure I know what Im getting myself into regarding the consequences of my actions. I feel better understanding that Im not going to crush my performance with the 100lbs or so plus I can make some reasonable engine mods to compensate. I believe I will be happy. Thanks everyone for all the feedback. Most appreciative.

Snorman

Unless you are routinely drag racing the car or running laps and are a very solid driver running at tracks on a regular basis you probably won't even notice the weight addition.
S.

OVR60

The ZO6 has 200 to 300 lbs more weight and 12 more horsepower than the ZR1 and everyone claims it is a lot faster. No one mentions the weight of the driver that could also add to the total weight of the car. Remember a few years ago with Danica ?

BJ67

Yup, and a tenth is a car length. When I used to street race a car that was real close and my wife was with me, made her get in someone else's car. Hey I am not gonna loose by a car length.

Snorman

What does the ZR1 have to do with anything being discussed in this thread?
And check your facts. The Z06 is about 171# heavier than a ZR1 according to GM's own numbers.
S.

JG853

I think that member's numbers are closer than what you are saying.

My 2011 3ZR MSO shipping weight showed 3278. Mine is the "heavier" 3ZR ZR1 package. A 1ZR packaged ZR1 is lighter than my 3ZR. Thus, the lightest quoted Stage 1 Z06 coupe from what I have seen from the factory for shipping weight was 3524 (I believe). Thus, that is a 246 pound difference. I do not know how much lighter a 1ZR ZR1 is, but I would assume it could be 20 - 30 pounds, which puts it closer to 300, as he stated.