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Author Topic: Spring selection  (Read 21112 times)

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Re: Spring selection
« Reply #120 on: April 14, 2009, 11:54:00 AM »
As long as the shock lays the same as the rake it can not effect it...
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trojan

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Re: Spring selection
« Reply #121 on: April 14, 2009, 12:07:28 PM »
Up to 90 degrees you are only using a portion of the shocks ability. The angle the shock "lays" at determines the amount of work it can do. eg at Zero degrees it does Zero work and at 90 degrees it does the most it can. Further if you allow the shock to go past 90 degrees it will effectively "give way".

In the same way, the rake angle should affect the suspension performance. In saying that I acknowledged that rake angle is usually small (less than 15 degrees) and won't play a great role like shock angle will.

It's trigonometry, not voodoo. Where it becomes voodoo is when you use "constant contact" mode formulas to calculate a "jumping" car's needs. Jumping cars have no interest in anything other than absorbing the landing and to do so most everything else is compromised (to the point of being not relevant) as a result.
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Re: Spring selection
« Reply #122 on: April 14, 2009, 12:17:04 PM »
Quote from: trojan on April 14, 2009, 12:07:28 PM
Up to 90 degrees you are only using a portion of the shocks ability. The angle the shock "lays" at determines the amount of work it can do. eg at Zero degrees it does Zero work and at 90 degrees it does the most it can. Further if you allow the shock to go past 90 degrees it will effectively "give way".

In the same way, the rake angle should affect the suspension performance. In saying that I acknowledged that rake angle is usually small (less than 15 degrees) and won't play a great role like shock angle will.

It's trigonometry, not voodoo. Where it becomes voodoo is when you use "constant contact" mode formulas to calculate a "jumping" car's needs. Jumping cars have no interest in anything other than absorbing the landing and to do so most everything else is compromised (to the point of being not relevant) as a result.
Still all comes to Motion ratio...
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Offline fabr

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Re: Spring selection
« Reply #123 on: April 14, 2009, 12:55:40 PM »
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Re: Spring selection
« Reply #124 on: April 14, 2009, 01:04:19 PM »
Quote from: Masterfabr on April 14, 2009, 12:55:40 PM
I don't think so.??? Maybe but I need convinced.
if you just wacked off the whole front end of a non raked car, shocks mounts etc, and welded it back on with rake, it would not effect the spring rate, IMO... How could it?
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Offline fabr

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Re: Spring selection
« Reply #125 on: April 14, 2009, 01:07:29 PM »
Because now the (raked)shock will have a different travel for a given vertical travel of the car compared to the non raked shock.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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Offline fabr

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Re: Spring selection
« Reply #126 on: April 14, 2009, 01:08:22 PM »
It would not change the rate but rather change the NEEDED rate. Am I wrong in this thinking?
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

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 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

trojan

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Re: Spring selection
« Reply #127 on: April 14, 2009, 01:15:40 PM »
coz the motion is not at 90 degrees to the force applied ;)
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Re: Spring selection
« Reply #128 on: April 14, 2009, 01:24:47 PM »
Quote from: Masterfabr on April 14, 2009, 01:07:29 PM
Because now the (raked)shock will have a different travel for a given vertical travel of the car compared to the non raked shock.
Wont be a bit different to the wheel rate...
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Offline fabr

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Re: Spring selection
« Reply #129 on: April 14, 2009, 01:27:13 PM »
That's what I think but if I understand it right bug doesn't.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

Offline fabr

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Re: Spring selection
« Reply #130 on: April 14, 2009, 01:28:10 PM »
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

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Re: Spring selection
« Reply #131 on: April 14, 2009, 01:41:44 PM »
The wheel rate, motion ratio, and sprung weight will all be exactly the same... Raked or not... Now maybe the valving would change but i dont see how the spring rate would differ all...
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Offline fabr

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Re: Spring selection
« Reply #132 on: April 14, 2009, 01:45:42 PM »
THe vertical travel of the car changes in relationship to the shock/spring travel therefore the NEEDED spring rate will be different.I am not saying that it will change the spring rate.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"

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Re: Spring selection
« Reply #133 on: April 14, 2009, 01:48:21 PM »
IMO you are wrong, But hey, whatever floats your boat..
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Offline fabr

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Re: Spring selection
« Reply #134 on: April 14, 2009, 02:06:34 PM »
I said why I thought I was right.Your turn to say how I'm wrong.
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"There can be no divided allegiance here.  Any man who says he is an American,
but something else also, isn't an American at all.  We have room for but one
flag, the American flag... We have room for but one language here, and that is
the English language... and we have room for but one sole loyalty and that is a
loyalty to the American people."
Theodore Roosevelt 1907

-----------------------------------------------------------
 " You have all the right in the world to believe any damn thing you'd like, but you don't have the right to demand that I agree with your fantasy"
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