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Old 09-14-2006, 08:33 PM   #1
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Default bellcrank vs. rack

Can anyone exlain the differences? I'm running the XXX-CR.
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Old 09-14-2006, 11:58 PM   #2
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Quote:
Originally Posted by Eggman
Can anyone exlain the differences? I'm running the XXX-CR.

The only one I think think of is an ackerman adjustment via washers under the horizontal ballstuds.
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Old 09-15-2006, 07:12 AM   #3
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The ackermann is also different for the bellcranks. The rack is a reverse ackermann setup.
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Old 09-15-2006, 07:17 PM   #4
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Rack = reverse Ackerman = when the front wheels start to turn you will notice that the wheels are TOE-IN during the whole steering throw

Bellcrank = pro Ackerman = when the front wheels start to turn you will notice that the wheels are TOE-OUT during the whole steering throw
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Old 09-16-2006, 09:58 PM   #5
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Rack is more consistent threw the turn.
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Old 09-17-2006, 12:35 AM   #6
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For those who dont know, Toe Out = Stability aka Push where as Toe In is twitchier but it turns more.

edit: Fixed

Last edited by K_King; 09-17-2006 at 02:58 AM.
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Old 09-17-2006, 02:48 AM   #7
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Quote:
Originally Posted by K_King
For those who dont know, Toe Out = Stability aka Push where as Toe Out is twitchier but it turns more.
WTF ?
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Old 09-17-2006, 02:58 AM   #8
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errrrrrrr

LOL sorry

Toe Out = Stability in the form of push.

Toe In = Twitchier in the form of more steering.
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Old 09-17-2006, 05:49 AM   #9
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oh thanks for clearing that up.
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Old 09-17-2006, 09:39 AM   #10
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I have always liked a nice rack myself
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Old 09-17-2006, 11:06 AM   #11
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Quote:
Originally Posted by K_King
errrrrrrr

LOL sorry

Toe Out = Stability in the form of push.

Toe In = Twitchier in the form of more steering.

ahhh..... yes and no (depends on where you are in the turn)


Toe IN = Less steering at corner entrance, More steering at corner exit (this is why you get "Stability in the form of push" but this would be on corner entrance)

Toe OUT = More steering at corner entrance, Less steering at corner exit (this is why you get "Twitchier in the form of more steering" this would again be at corner entrance)

Don't forget, the more steering you add for corner exit will make the rear of the car feel looser (less rear traction). It's all about F/R traction balance. So, a loose rear end of the car (assuming tires are correct, etc.) could very well be fixed by the front of the car; in this case less Toe out (or more Toe-In... however you want to say it ) Just to make things more confusing for thsoe new to car set-up, etc.


One question I do have for those that are intimately famillar with the rack and cranks is this:

Which one gives the outside wheel the sharpest angle of attack when at full steering lock?

Or, are the outside wheels at the same angle between the rack and the cranks at full lock?

Last edited by Mike Dana; 09-17-2006 at 04:01 PM.
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Old 09-17-2006, 01:31 PM   #12
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toe out will yeild more initial steering and less thru the middle and out.

toe in will smooth out the initial steering and have more midle and out.
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Old 09-17-2006, 03:12 PM   #13
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Quote:
Originally Posted by Mike Dana
ahhh..... yes and no (depends on where you are in the turn)


Toe Out = Less steering at corner entrance, More steering at corner exit (this is why you get "Stability in the form of push" but this would be on corner entrance)

Toe In = More steering at corner entrance, Less steering at corner exit (this is why you get "Twitchier in the form of more steering" this would again be at corner entrance)

Don't forget, the more steering you add for corner exit will make the rear of the car feel looser (less rear traction). It's all about F/R traction balance. So, a loose rear end of the car (assuming tires are correct, etc.) could very well be fixed by the front of the car; in this case less Toe out (or more Toe-In... however you want to say it ) Just to make things more confusing for thsoe new to car set-up, etc.


One question I do have for those that are intimately famillar with the rack and cranks is this:

Which one gives the outside wheel the sharpest angle of attack when at full steering lock?

Or, are the outside wheels at the same angle between the rack and the cranks at full lock?
You got everything backwards...
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Old 09-17-2006, 03:23 PM   #14
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Sorry I was generalizing it, but overall thats what you will feel

Toe Out = Looser in tighter middle off

Toe In = reverse affects.

In = less stable car on the straights, slightly more speed due to tires not going opposite directons.

Out = Opposite.
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Old 09-17-2006, 04:02 PM   #15
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ha, ha, ha... your right! I edited my post.

anybody know about the wheel angle??
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