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Author Topic: Caster How much?  (Read 22523 times)

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Offline SPARKY

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Caster How much?
« on: March 18, 2008, 09:05:12 PM »
When I reinstall my axel----what are people running---thanks in Advancefor you replys !!!!!!!
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Offline Howard

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Re: Caster How much?
« Reply #1 on: March 18, 2008, 09:59:54 PM »
Sparky,
Everyone has an opinion on this but I ran 30 degrees on both my liners and it worked fine. Drove straight as a string.
Howard
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Offline Dr Goggles

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Re: Caster How much?
« Reply #2 on: March 19, 2008, 07:29:32 AM »
30 degrees here Sparky too ,even with massive positive scrub it just wanted to go straight, we're changing the scrub(it felt weird in a U turn) and going to very slight positive camber just to be conformist, I'm mean that's what everyone wants right?
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Offline doug odom

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Re: Caster How much?
« Reply #3 on: March 19, 2008, 10:18:52 AM »
I use 7 to 9 degrees on all 3 cars. I see no reason to use more than that as they go straight.
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Offline Sumner

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Re: Caster How much?
« Reply #4 on: March 19, 2008, 11:48:07 AM »
Quote from: Dr Goggles on March 19, 2008, 07:29:32 AM
30 degrees here Sparky too ,even with massive positive scrub it just wanted to go straight, we're changing the scrub(it felt weird in a U turn) and going to very slight positive camber just to be conformist, I'm mean that's what everyone wants right?

You a conformist  8-).  Hey then I might not recognize you when I get down there  :-P.  I guess I'm shooting for no camber, so I'll be the non-conformist,

Sum
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Offline 836dstr

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Re: Caster How much?
« Reply #5 on: March 19, 2008, 01:22:35 PM »
12 degrees with an I-beam axle. Goes straight, SO FAR.

Tom
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Offline Sumner

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Re: Caster How much?
« Reply #6 on: March 19, 2008, 03:07:52 PM »
Quote from: 836dstr on March 19, 2008, 01:22:35 PM
12 degrees with an I-beam axle. Goes straight, SO FAR.

Tom

Hey Tom mine has 18 degrees and so far on the build table I've had no problems either  8-).  It is still going as straight as it was a couple years ago,

Sum
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Offline 836dstr

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Re: Caster How much?
« Reply #7 on: March 19, 2008, 03:43:05 PM »
Sparky,

Steering stops are required on anything over 20 degrees of caster.

Sum,

Straight is GOOD. I wish I could consistantly hit a Golf ball straight. Given the option I would choose keeping the Roadster straight and the Golf ball fadeing.

Tom

P.S. It's so nice to be back on-line!
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Offline bvillercr

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Re: Caster How much?
« Reply #8 on: March 19, 2008, 04:35:37 PM »
I could be wrong, but I thought I saw in the rule book that new vehicles couldn't have over 22 degrees.   :?
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Offline thundersalt

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Re: Caster How much?
« Reply #9 on: March 19, 2008, 06:33:40 PM »
We run 15 degrees on the Fairlane (IFS) and it goes fairly straight.
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Offline 836dstr

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Re: Caster How much?
« Reply #10 on: March 19, 2008, 07:37:49 PM »
This is a little off subject, and will date me, but what kind of caster did they run on the old front engine short wheel base Top Fuel Dragsters?

I used to love watching them push start them from the top end then pull and push them around until lined up. The front wheels at full turn looked like they were almost flopped at a 45 degree angle.

The good old days!

Tom
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Offline bvillercr

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Re: Caster How much?
« Reply #11 on: March 19, 2008, 08:10:20 PM »
Quote from: 836dstr on March 19, 2008, 07:37:49 PM
This is a little off subject, and will date me, but what kind of caster did they run on the old front engine short wheel base Top Fuel Dragsters?

I used to love watching them push start them from the top end then pull and push them around until lined up. The front wheels at full turn looked like they were almost flopped at a 45 degree angle.

The good old days!

Tom

sounds like Freddies old Modified Roadster.
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Offline SPDRACR

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Re: Caster How much?
« Reply #12 on: March 20, 2008, 12:35:51 AM »
Sparky, On my roadster we run 16 degres caster with just a touch of camber. Have never checked for scrub, I try to keep the roadster going straight at all times. When it does not go straight it's not the casters problem, more so tring to push a barn door through the air at 220 mph with 5"wide tires!!  You gotta love driving roadsters, nothin better. Good luck with your project.    Eric
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Offline nebulous

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Re: Caster How much?
« Reply #13 on: October 04, 2010, 04:52:14 PM »
 caster creates a diagonal weight bias when the wheels are turned. if you plan to never turn the wheels it is a moot point. BUT What if you fish tail?
Jack
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Offline RICK

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Re: Caster How much?
« Reply #14 on: October 04, 2010, 05:19:58 PM »
Diagonal weight bias????  I just barely got 'scrub radius' understood. But seriously Jack,  How much caster do YOU design/build into your cars?

   Ultra-curious,  Rick
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