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PostPosted: August 22, 2019, 4:05 am 
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Joined: July 20, 2009, 1:16 am
Posts: 109
Hi all,

I'm just putting the finishing touches on my plan for a new build using Miata subframes and have a question regarding the geometry.

At what height (relative to stock) will the Miata have the 'best' all round suspension geometry for a light weight car?

My current plan is to have the subframe at the same height that it is installed in the Miata and have the chassis designed so that's normal ride height, but then I got to thinking that perhaps it would work better if the standard ride height was with the subframe a couple of inches lower, maybe get some extra camber gain into the system.

I can mount the front and rear subframes at different heights if that turns out to be ideal.

Anyway, if anyone has any input into what height I should have the subframe sitting at ride height I'd appreciate hearing it :D

Cheers!


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PostPosted: August 22, 2019, 6:46 am 
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The miata suspension was very well designed for overall performance at the original ride height.
I suggest fitting the subs at orig height front and rear and the frame rails where you want them.

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PostPosted: August 30, 2019, 2:53 am 
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Miatav8,MstrASE,A&P,F wrote:
The miata suspension was very well designed for overall performance at the original ride height.
I suggest fitting the subs at orig height front and rear and the frame rails where you want them.

Thanks mate that was my first instinct, but then I thought most Miata's on track lower them. I guess the main advantage to that is probably the lower CoG, which I can do by changing the frame and retaining the stock geometry.


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PostPosted: September 2, 2019, 5:58 pm 
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Joined: July 4, 2006, 5:40 pm
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Location: Novato, CA
The only benefit to lowering a stock Miata is lowering the CG, but doing so increases bump steer, an unfortunate side effect. On a Locost you can have have the perfect setup with both a stock geometry and a lower CG. Camber is adjustable on the Miata suspension so you can dial that wherever you want it.


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PostPosted: September 3, 2019, 1:36 am 
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Joined: July 29, 2006, 9:10 pm
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Location: Oregon, usually
I'm probably preaching to the choir, but I'm with MiataV8 and nick47 on both counts.

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PostPosted: September 5, 2019, 5:08 am 
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Joined: July 20, 2009, 1:16 am
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nick47 wrote:
The only benefit to lowering a stock Miata is lowering the CG, but doing so increases bump steer, an unfortunate side effect. On a Locost you can have have the perfect setup with both a stock geometry and a lower CG. Camber is adjustable on the Miata suspension so you can dial that wherever you want it.

JackMcCornack wrote:
I'm probably preaching to the choir, but I'm with MiataV8 and nick47 on both counts.

Thanks guys, now I know I'm on the right track!


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