One last time, BANG

[M4wdFab]

150/200 is still too soft.  we will have to go much more rate in the rear to get 3" more of shaft, and 2-3" preload.


with 125/200 on there now, 4" shaft showing, 3" preload, math says thats 1000lbs per back corner corner-  i cant imagine that is correct.  (not ignoring angles would make that number even more)


with that same 1000lbs to get 7" shaft with 2" preload, id need a rate of 110lbs/in  or like 200/250 or 150/300



not sure if parts shocks will allow dual rates on back shocks

[mr.mindless]

my understanding gets me ~490#/corner with those numbers

That might sound close-ish to rear sprung weight? 5k car, 70/30 to 60/40 weight bias, 1500+ unsprung; 3500 sprung so front 2000 rear 1500 might be closeish, bar napkin style. 2500/1000 seems a little too front-heavy but for throwing random numbers around in addition to having the angles playing tricks on linear vs actual rates, it seems ballpark reasonable

where am I wrong?

for dual rate the total rate is both springs added/2; 3" preload given as fact (I'm not so sure of that number)

(125+200)/2 * 3" = 487.5#

with a proper die, dual rates on those bodies might be doable again; not sure if there would be enough thread left to hold up.

[M4wdFab]

for dual rate the total rate is both springs added/2; 3" preload given as fact (I'm not so sure of that number)

(125+200)/2 * 3" = 487.5#

thats wrong

its 1/K1 +1/k2 = 1/kTotal   its like resisters in series.....

[M4wdFab]

F=Kx
1/K1 +1/k2 = 1/kTotal

i looked at it as 4" shaft showing, means 10" shaft compressed plus 3" preload, or 13" total spring compression agains total rate (no dual rate stops)


13*total rate

i also ignored the 100lbs or so from the nitro charge

[gif]

for dual rate the total rate is both springs added/2; 3" preload given as fact (I'm not so sure of that number)

(125+200)/2 * 3" = 487.5#

thats wrong

its 1/K1 +1/k2 = 1/kTotal   its like resisters in series.....

No, parallel.

Series is r1+r2+r3+r4=RT

[M4wdFab]

what a man, i have to think about this now

[M4wdFab]

o ya parallel, but my math is right, correct?

[gif]

for springs, i think so.  I would have to look at my notes in the shop.   

I used this too:
http://f-o-a.com/calculator.html

was spot on.


Also here is a fancy one from BV.

[attachment deleted by admin]

[mr.mindless]

Forgetting to add the compressed distance was quite retarded of me, and I'm embarrassed.

I was ignorant of sum of rates being figured in inverses. makes sense throwing it in a graph and looking at it and thinking about it. That's just a fail on thinking things through.

[M4wdFab]

thats ok, you are allowed to be dumb with your degree more than i am  

[Nick]

A²+B²=C² !!!!!!

[mr.mindless]

nope, that one's for track bars and drag links, Nick!

[M4wdFab]

man this pile took a beating this weekend, it has to be in the worst shape ever after a race i have ever seen haha

[JEEPWERX]

nope, that one's for track bars and drag links, Nick!

 Nope. Wrong again mike... lol

Its for digging square holes!

Sent from my DROID3 using Tapatalk 2

[M4wdFab]

odd slapping noise when shocks not banging was actually the high lift.  not the handle but the actual high lift.  mount bolts were loose.


air bump has pressure but is locked up, doesn't look to be bent or damaged from outside.