True but the typical 1/4 vehicle model also takes into account tire spring rate between the unsprung mass and the road surface (input signal). It gets complicated fast. We can't simplify this problem any more that that standard model because any further simplification would result in junk answers, ie. Garbage-in-garbage-out.

The system is already tuned way lower than what you're describing, somewhere between 1-2 Hz, I think. At most 8 Hz for super racecar.

Resonance is good for musical instruments but way bad in this case.

You are correct. I am mixing up wheel rate and suspension frequency. Time to hit the books again :cry::thanks:

I was talking about frequencies Mostly I think? haha, though wheel rate is better than spring strength.


edit: what the heck am I thinking? I think I have something majorly wrong in what I thought I knew about suspension. ignore half of what I say please, hahaha.

We're way off topic in this thread. Should we start a new one? @himbo?

I studied this a little because of my FSAE team. That's all. My vibrations analysis prof. and I really bonded. I'm no genius but I innately consider the acoustical implications in just about everything I see.

Keep me honest. That's the most important thing. :D

edit: btw, I reread your first post with this in mind.
The victorylibrary article's statement about lowering spring rate makes more sense if considering the primary goal to be comfort. It's not that you need to lower the wheel rate accordingly, it's that you can get away with lowering it to improve comfort.

It's a design flaw with a large number of factory year versions of their flagship performance market offering is what I'm trying to underline here.

Nah. I'm not a huge stickler for these things, I'm all about a good flow of ideas. Mostly, I wanted to see what people would have done if they were designing the car within the perimeters it was built around. The perimeters being cost, safety, etc. Sometimes these types of perimeters promote really innovative and creative ideas.

Stickers as headlights 😃


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remove passenger seat and rear seats.

No rear seats would probably have been the best. Spare tires can be handy lol

Rear seat delete is estimated to be ~25 lbs.
link 1 link 2
Spare tire is about the same at ~25 lbs.
http://www.ft86club.com/forums/showthread.php?t=7881

The OEM battery weighs ~30 lbs and a super light replacement (<5 lbs.) is going to cost ~$500 or more. (See above link for the tire)

At most you're looking at 75 lbs for all those things, maybe 80 since the design engineers can likely make other savings with those changes that the consumer can't by ripping them out (i.e. no well in the trunk = less sheet metal, remove hardware there for mounting tire).

There's potential for an OEM GT3 RS like version coming in under 2,600 lbs wet (there's at least one member who's down to ~2,400 lbs with fuel) but there's a small cross section of people who want that and would pay for it instead of living with the weight and luxuries (A/C, NVH, Radio) or the people who would do it themselves to a more extreme degree. Given how expensive the special editions have been I think they'd struggle to keep the cost under $30k as it would take significant changes in production to complete instead of a new color and some bits slapped on after the fact.

I've seen the small battery that replaces the oem one (that the electric supercharger setup uses) and it's way less money than 500. It's like 130 or less. Huge difference.

You could have put down the fork and went running...

Yup you're right, I just pulled the one from the vendor, here's a Shorai battery for a bike at $185 that some guys have used. The SuperB I was thinking of seems to be for heavier duty applications, with this Shorai it sounds like there is a risk that it won't keep up with some rigorous demands but if you're going for all out performance then the compromise is worth it.

[ame="http://www.amazon.com/Shorai-LFX-Battery-LFX21A6-BS12-Black/dp/B0088JGUTA"]Amazon.com: Shorai LFX Battery - LFX21A6-BS12/Black: Automotive[/ame]

http://www.ft86club.com/forums/showt...=42284&page=28

I think this about covers it:
My first thoughts were single exit exhaust, and that surely they could've made much lighter seats at the same price point. Hell, the single exit exhaust would've saved money, so maybe they could've taken the savings and invested them into making the wheels a pound lighter or something. Maaaybe a one piece driveshaft? Which again seems like it would save money.


Turns out, there is. No one talks about it though. It's actually a minimum requirement, and so far you're the only member on this entire website that's even attempting to pull his/her own weight. So... by my calculations, you're winning.

Oh. And I also just realized...