if so does any1 know how many .1 secs are equal to 150 lbs in the trunk???

 

all depends on which car you're driving and it's weight/power.

adding 150lb on a max will hurt it worse than adding 150lb on a fullsize truck.
it will fare better than a honda with 150lb or cargo though.

a rough guess for a Max is about 0.1 sec.

 

I heard that every hundred lbs is .1 seconds... Which is about one car length.

 

I heard the same exact thing. Each car is different. Run your car at the track then add 100lbs. Run it again. You'll see the difference in the time.

 

Theblue and Ejj were running 14.5 and 14.6 all night at the track and then they each took on 400lbs or passengers and ran and blue ran a 16.8 and EJJ ran a 17.2 think it slows you down.

 

Other way around...I ran the 16.8. theblue's slow.

 

as an estimate 100lbs = roughly .1 second...

but total weight and power are factors also.

 

nismo2020 and i ran at the track, i lost by .1 sec(high 15.1 vs. high 15.2) that equalled to about 1/2 car length. about the weight though...our power to weight ratio is about .057 hp/lbs. So if ur carrying a passenger of about 160 lbs, then ur losing bout 9 hp. for comparision, my buddy w/ an e46 m3, he would lose close to 16 hp. i'm not sure if 9 hp would equal to .1 sec though...

 

It's all dependant on torque and power delivery. 150lbs is like adding 5% in weight. I'd say it will slow you down at least .2 and 2mph.

Dave

 

I personally believe that the 100 lb = 0.1 is crap. When I have five people in my car I feel it, it's gotta be worth like a second at least, if not two seconds.

I think the more weight in the back of the car is worse.

 

When I have people in the car I also feel it. When I step on the gas it takes about a second to kick in.
Paul

 

It would seem that 400lbs = 2 seconds, so it seems that 100lbs = .5 seconds.

Stereodude

 

I lost .5 seconds off my times at Maxus just from removing all the crap (tires, tools, crap) out of my trunk.

 

removing weight is the cheapest and easiest way to make a car faster.. why do you think there are so many stripped civics...

 

And close to stock GXE's.......

 

It also depends where that weight is located. Particularly with front wheel drive. The more weight you add to the rear of the car (trunk, backseat) the more you unload the front wheels and reduce your grip.

 

1/2 sec is a lot to loose from just removing junk from the back. there are a lot of factors that could effect ur time...temp, humidity, etc. or maybe u just got better at launching the car! check ur 60' times. i think something like a .1 improvement = .15-.2 improvement in 1/4 time.

 

Since on the subject, about how much weight do you take off by getting a CF hood?
Thanks,
Paul

 

I did the math once (bored in class) and, using a HP formula, I figured out that it is almost exactly linearly a .15s 1/4 mile ET reduction for every 100 lb shed from the car. However, in real life, when I took my ~200 lb friend out with me one night, my times were, on average, 0.6s higher which would equate to 0.30s per 100 lb. Either way, weight is bad.

 

hmm my 15's are weighing and slowing my **** down

 

...being 6'6" 320 lbs.

 

Anyone?
Thanks,
Paul

 

Not that its relevant for cars but when trucks go through the speed tests like quarter mile speed and times when like C & D or Motor Trend. The vehicles get run with no extra weight and then with 1000 lbs of extra weight in the back. The extra weight translate to about 3/4 to 1 second longer in the quarter mile times. I thought it would have been more than that, if I can find find the article I will post the differences.

 

i'm not exactly sure but i thought that hoods weight about 50-60 lbs and carbon fiber hoods were about 20? of course, i could be way off!

 

damn i thought i was handicapped, 6 feet 235lbs. i should have mattsy drag my car that scrawny bish.

 

going to run my car this month i'm only 5'7 140 but who cares i still get the women

 

6'4", 270lb.

Being big has other advantages though

 

yes it does

 

It's all dependant on available torque. An extra 100lbs to a 106 ft/lb Civic Si will suck out at least .2 second. An extra 100lbs to a 500ft/lb Cummins turbo Diesel Ram will probably not even be measurable.


Dave

 

please answer this is it really noticable if you take the spare tire out of the trunk? i think it will be to no advantage cause it doesn't weight that much but i undersatnd that weight is weight

 

With the factory spare...no not really. I take mine out all the time 'cause I have a "full size" 15" steel rim. Over 40lbs easy.

 

The 'donut' weighs 27lb. Which 'theoretically' is equal to ~0.04s in your 1/4 mile.

 

How did you come up with this figure? Or are you just BSing?

The way I see it, any weight in the rear on this FWD car is weight off the front drive wheels. I'd be more concerned about traction rather then the engine overcoming the inertia to move the extra weight. Thats why I also love my new stiff suspension, less weight transfer.

 

No I'm not b.s.ing. If you look at my post a page or so ago, you'll see I used a HP formula to figure out that every 100lb is equal to ~0.15s. Therefore 27lb is equal to (27/100)(.15)=0.04s.

 

hehe.