IS this bad for my suspension.

[G'd up]

ok guys so iv got 20s on my car and instead of using the 15 inch spare i put one of my old factory wheels in the spot. the only thing is that his is like 20 pouns heavier. and on top of that i allready have a HUGE sub box in my trunk too. over all theres prob about 100 pounds off sub box and spare tire with one of my oem rims (not spare) or if i put the spare back it will prob be like 75 pounds in the rear. so being as how i allready have weight on the trunk from my sub box. do i want to keep it as minimal as possible or is an extra 20-30 pounds not gonna make a difference??????

thanks everybody

[Focusedintntions]

you should be ok...just remember from now on in the back....

[ArEs23x]

^ + 1

[G'd up]

agreed. do you think the extra weight will cause my shocks to go out faster???

[telcoman]

you should be ok...just remember from now on in the back....

Yes. These two have already destroyed mustangs and other Fords.

Keep them away from your G

Telcoman

[Focusedintntions]

Just depends on the roads around you....but the short answer is yes....will it be significantly shorter...no....honestly the biggest issue you may have is rubbing on huge bumps...but more than likely you won't notice anything different except for maybe a slightly lower rear.

[ArEs23x]

Telcoman, are really are a sick man.. ewwwww

[G'd up]

got ya. well the lower rear will prob make my car look a lil lowered. so thats cool. i just hope my shocks dont go quick now. with all the extra weight in my car ......

[Sentientbydesign]

Not sure if the Sedans are as balanced as the coupes, but if so, then you shouldn't have any problems.

The coupe springs rates are the same for the front and rear, which means that loading extra weight there vs the front wouldn't do any damage.

The thing to worry about is total weight for the vehicle. On the door pilar there's a table that says what the maximum weight is for the vehicle. My 05 coupe has a maximum passenger/cargo weight of 750 which isn't much for 4 people and some junk in the trunk.

[W661335PF]

So at the risk of being banished or getting much hate mail from others, I have to say that I find the "fat chicks" and obesity humor a bit tasteless, ill-chosen, immature and crass. While I'm not obese, I still think we can do better than this here.

[G'd up]

Not sure if the Sedans are as balanced as the coupes, but if so, then you shouldn't have any problems.

The coupe springs rates are the same for the front and rear, which means that loading extra weight there vs the front wouldn't do any damage.

The thing to worry about is total weight for the vehicle. On the door pilar there's a table that says what the maximum weight is for the vehicle. My 05 coupe has a maximum passenger/cargo weight of 750 which isn't much for 4 people and some junk in the trunk.

yeah i just read mine it says 900lbs max

[Sentientbydesign]

So at the risk of being banished or getting much hate mail from others, I have to say that I find the "fat chicks" and obesity humor a bit tasteless, ill-chosen, immature and crass. While I'm not obese, I still think we can do better than this here.

Crude? Yes. Taste-less? Yes. Do I think anyone should ever get that fat? HELL NO! Do I think women who chose to get that fat and then parade in bikinis should be tormented for their stupidity?....*crickets*

[W661335PF]

Crude? Yes. Taste-less? Yes. Do I think anyone should ever get that fat? HELL NO! Do I think women who chose to get that fat and then parade in bikinis should be tormented for their stupidity?....*crickets*

Obesity is not necessarily a choice. On our practice we see obesity in a more holistic way-- as a result often of genetics (obesity usually runs in families and is hereditary/genetic), at times it can be neurologically based (e.g., hypothyroidism, Cushings syndrome, hypothalamus being damaged, etc.) and often has behavioral and psychological factors. Why not get our joys elsewhere as opposed to being cruel and crass.

[C-Kwik]

Not sure if the Sedans are as balanced as the coupes, but if so, then you shouldn't have any problems.

The coupe springs rates are the same for the front and rear, which means that loading extra weight there vs the front wouldn't do any damage.

The thing to worry about is total weight for the vehicle. On the door pilar there's a table that says what the maximum weight is for the vehicle. My 05 coupe has a maximum passenger/cargo weight of 750 which isn't much for 4 people and some junk in the trunk.

The spring rate in that of itself are not important. Given the design of the G's suspension, the rear springs have to be stiffer than you might find in the rear of most vehicles (relative to the front spring rates). The G35's use springs that are at about the midpoint of the LCA. Most vechiles locate their springs closer to the wheels. The effective wheel rates from front to rear are going to be much further apart then the spring rates themselves suggest.

That said, it's doubtful that an additional 100 lbs in the rear is going to be a huge cause for concern. Accelerated wear may occur, but that is dependent on many factors. I would be concerned though if the extra weight caused the shocks or suspension to bottom out. In which case shocks can blow or other problems can arise...

[Sentientbydesign]

Here's my take on obesity.

I chalk it off to stupid choices in ingredients (not the consumer's fault) like High fructose corn syrup, hydrogenated oils, and sugar substitutes (lets take this to the political arena if you want to argue with me on the last one).

And lack of self control. I'm 65lbs overweight on a height chart. And around 30 lbs overweight realisticall (I don't think I should be 6'3" and weight 185 lbs like the chart suggests). I have been at MY ideal weight and my overweight-ness is nothing more than poor diet choices and a lack of physical activity (40 hours sitting at a computer and another 14 on the weekends driving around).

The current medical trend is to classify every condition as an illness. It is true that there are many illnesses that weren't classified 100 years ago and should have, but there are plenty more that shouldn't be illnesses at all and individuals should take responsibility for their issues.

[G'd up]

The spring rate in that of itself are not important. Given the design of the G's suspension, the rear springs have to be stiffer than you might find in the rear of most vehicles (relative to the front spring rates). The G35's use springs that are at about the midpoint of the LCA. Most vechiles locate their springs closer to the wheels. The effective wheel rates from front to rear are going to be much further apart then the spring rates themselves suggest.

That said, it's doubtful that an additional 100 lbs in the rear is going to be a huge cause for concern. Accelerated wear may occur, but that is dependent on many factors. I would be concerned though if the extra weight caused the shocks or suspension to bottom out. In which case shocks can blow or other problems can arise...

i doubt my shocks or suspension will bottom out. at least i hope not over 100 pounds. but ill be super extra carefull when im dirving with people in the back

[C-Kwik]

I should add that if long term wear on the shocks were of concern then choosing a 20 inch wheel/tire combo will probably have a bigger effect than 100 lbs of extra weight. In either case, if you're not bottoming anything out, I wouldn't be concerned with any immediate failures. Do expect a shorter service life out of the shocks though.

[W661335PF]

Here's my take on obesity.

I chalk it off to stupid choices in ingredients (not the consumer's fault) like High fructose corn syrup, hydrogenated oils, and sugar substitutes (lets take this to the political arena if you want to argue with me on the last one).

And lack of self control. I'm 65lbs overweight on a height chart. And around 30 lbs overweight realisticall (I don't think I should be 6'3" and weight 185 lbs like the chart suggests). I have been at MY ideal weight and my overweight-ness is nothing more than poor diet choices and a lack of physical activity (40 hours sitting at a computer and another 14 on the weekends driving around).

The current medical trend is to classify every condition as an illness. It is true that there are many illnesses that weren't classified 100 years ago and should have, but there are plenty more that shouldn't be illnesses at all and individuals should take responsibility for their issues.

Well, you're about 1/3 of the way there. And no we don't classify everything as a medical illness, we see choice in many things and even see some of what passes as mental illness as little more than irresponsible, immature behavior and a real failure to grow up and face reality.

Oh, forgot to discuss the suspension issue... Actually, i think it's been well answered by others. I took a slight deviation on your thread, sorry bout that.

[G'd up]

jeeezzz all you chubby chasers go start your own thread and quick jackin' mine

back to my discussion. C-kwik, how is it that bigger rims cause less life out of your shocks?? and is this a big issue in or just something thats gonna happen over time??????

thanks bro

[Focusedintntions]

bigger rim = more rotational mass = more work the suspension has to do to keep the wheel/tire on the ground.

G'd up...don't worry....the stuff in the back may take off like 3k miles off the life of your shocks....if you hit a really big hole and it blows the shock...it would have blown regardless of that stuff.

[C-Kwik]

bigger rim = more rotational mass = more work the suspension has to do to keep the wheel/tire on the ground.

G'd up...don't worry....the stuff in the back may take off like 3k miles off the life of your shocks....if you hit a really big hole and it blows the shock...it would have blown regardless of that stuff.

Well, the suspension isn't affected by rotational mass. It's affected by unsprung mass. Rotational mass affects the ability for the engine to accelerate the vehicle and the brakes to decelerate the vehicle.

Increased unsprung mass does create a bigger load on the springs and shocks however. Imagine rolling two wheels/tires of different weights down the road. Both hit the same bump at the same speed. In theory, both would bounce off the bump at the same speed and height. But the heavier wheel would actually have more momentum as it has more weight.

In order for the spring and shock to slow down the wheel, it requires more force or the same force over more time. As the latter is going to be the case given the same suspension set-up, it means the suspension will compress more. This also translates to requiring more rebound to compensate for additional force over the lighter wheel as the suspension rebounds. This cycle repeats to some extent as the suspension goes between compression and rebound.

[G'd up]

ooooooooooo ok now i understand. nice way of explaining it c kwik. well thats good to know my shocks will be wearing faster and if i hit a huge bumb im screwed......... but thanks to everyone for the input

[tollboothwilley]

Ok, here's my take

If you hit a big bump you will be mad for trashing you rim as much as your suspension. The likelihood (you have the sport suspension) of having real issues with extra wear by having the subs in the trunk is very minimal. I have had mine in there, junk in the trunk, and people in the back seats and I've never had any rubbing. I do have the 350z suspension, which is a little stiffer, but still, it should not be a problem. Don't stress over this. Its very minor.

Now, if you did want to lower/stiffen up those springs there are things you can do...