Anti-dive geometry and suspension points

Suspension, including wheel, tire and brake.
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S15DET
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Anti-dive geometry and suspension points

Postby S15DET » 17 Feb 2015 12:56

I understand raising the LCA inner pivot point, and the accompanying raising of the T/C rod mounting hole. If both are moved the same amount, the idea I guess is to restore camber gain after lowering. Has anybody looked into how much to raise each, and if there are any benefits to raising the LCA inner point more that raising the T/C rod hole in order to increase anti-dive percentage?
Does anyone know what the stock geometry anti-dive percentage is? I've seen how to measure it, but don't have the accurate points to pull it off. Do the 70-later bodies have a lower T/C rod hole to go along with the lower hole in the crossmember?

Isn't someone currently making a cad model of the 510 points? That will be a great start.

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okayfine
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Re: Anti-dive geometry and suspension points

Postby okayfine » 17 Feb 2015 13:24

Because when you spend a silly amount of money on a silly, trivial thing that will help you not one jot, you are demonstrating that you have a soul and a heart and that you are the sort of person who has no time for Which? magazine. – Jeremy Clarkson

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icehouse
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Re: Anti-dive geometry and suspension points

Postby icehouse » 18 Feb 2015 21:07

Have you checked the bump steer with the Toyota rack in your 510?

I was amazed how good the bump steer was just dropping the rack into the existing suspension. Not perfect but doing some tests by moving points it could have been WAY worse so easily.
"People don't like it when shit doesn't match their rule of thumb." Sam

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S15DET
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Re: Anti-dive geometry and suspension points

Postby S15DET » 19 Feb 2015 05:46

I never did make a bump steer gauge. I mounted the rack at the same height as the LCA pivot, here's some pics. How does this compare you your position?
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icehouse
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Re: Anti-dive geometry and suspension points

Postby icehouse » 24 Feb 2015 18:15

Do you have a measurement of your rack from the LCA's? I could put it in the model and see what it says. Not that we have proved it yet. I should have the 510 front in my garage soon.
"People don't like it when shit doesn't match their rule of thumb." Sam

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S15DET
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Re: Anti-dive geometry and suspension points

Postby S15DET » 27 Feb 2015 07:00

You mean if viewed from the side, a measurement from the center of the rack to what, maybe the side of the crossmember, or maybe a rough guess of the center of the LCA? I can do that (and I may even have that measurement somewhere.

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icehouse
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Re: Anti-dive geometry and suspension points

Postby icehouse » 27 Feb 2015 09:27

I think rough estimate of the center of the LCA would be good.
"People don't like it when shit doesn't match their rule of thumb." Sam


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