5th gear problem (not this again)

[ashah000]

lol... Dude i have to figure this out now. I will see what my physics teacher says, and then i will give up.

[ashah000]

Ok so should I worry about my shifter popping out of 5th

[95ClipseGS-T]

lol. I know how it is when you cant figure somthing out, it just keeps eating at you till you do.

[BoostedSpyder]

if the pivot was from the base of the shifter, it would never shift, just like if you put your finger on an upright toothpick. damn, i did hurt my brain... you guy's are giving me flashbacks to college trig...

i was just thinking a little out loud before, and this is not meant to prove my theory over any others, but meant as a difinitive answer [for fun ]...

now i got to knock the cobwebs off...

reducing the length of the shifter will not change the angle of required movement, only the distance of travel required to achieve such angle, and the percentage of difference of said travel is the solve.

circumference is still [and if i'm wrong, just don't make too much fun of me, i went to San Diego State!]: 2pi[r]

given: that the length of said shortened lever from the fulcrum to the top is [x], and the original shifter is [x+2.5]:

given: the angle theta[t] is constant

given: the length of the arc will be a constant percentage of the entire circumference: t/360 = percentage of circumference = [t%]

therefore: [t%][2pi[x]] = arc length [a]
and: [t%][2pi[x+2.5]] = arc length [b]

and % difference would be 100([a]/[b])

now just plug the #'s LOL

[ashah000]

Wait I dont have an angle.
Edit>> So the fulcrum is in the middle(where the hole is) And I have to measure from there to the top.

[ashah000]

But then if the angles are the same so they can cancel out, and so can the 2(pi). So we are back to the New length/original length. But this time it is not subtracted by 100.

So the answer is 64.29% or 35.71%

[BoostedSpyder]

yes, you have to measure from the static pivot point to the top. in the end, you would end up with the equation:

100{t%2pi(x)/[t%2pi(x)+t%2pi+2.5)]}

remember the 1% is = .01 [i put the % in there to simplify the basic eq]

if i remember my algebra right, you can't break that up, and you would not want to cancel out anything because then you are looking for a specific # based on the given parameters, so in reality those would all be #'s.

say theta = 35 [deg]

and x = 3

so:35/360 = .097

therefore: 100{[.097(2)(3.14)(3)]/[{.097(2)(3.14)(3)}+{.097(2)(3.14)(2.5)}]} = 100[1.83/(1.83+1.52)] = 54.58% shift throw reduction

so you see there is a difference and they don't just cancel out.

now i haven't stepped foot in a classroom for, well let's just say even though i was at college, i wasn't 'at' college. so i could be completely off, but i'm pretty sure this is sound

[amdsoldier]

Are there any drawback would you guys say to cutting a shifter down in size? I was thinking perhaps there would be less leverage (sp?), making it harder to throw into gear (more force required). I have no idea one way or the other, but thought I'd ask to be on the safe side.

I had my reverse pop out once, but that was because I didn't have it in gear 100%. Kinda just quickly stuck it in, but I felt it right away that it didn't seem to be in place exactly (no grinding). So maybe shorter it is, more diffcult it may become to get it into gear correct? I dunno just a idea, but probably not correct as shifting between gears with my short shifter is a brezze right now (should be 40-50% decrease right now).

I was just thinking if it would be worth it for me to also cut my short shifter down in size about 2" or so. Cause my boot right now hangs off the shifter exposing the metal stem + my hand would be held lower which should make it more comfortable for me.

[JoeWagon]

That's 100% true.
There is less leverage which makes it harder to shift.

Check this out... the design of steering wheel size is a balance between 3 things:
1. Small enough that you can turn without cranking it 50 times.
2. Big enough that a slight bump doesn't throw you out of control
3. Big enough that you have enough leverage to turn it easily (thank you, power steering!)

Same kinda deal.. it's a trade off. Decide what's more important.

[ashah000]

This is too early too be reading this much math, but thanks.

I think I am going to get the Symbroski shift kit next.

[BoostedSpyder]

ya, i think i hurt my brain... lol