LocostUSA.com

Hi guys. Does someone have a Miata front subframe lying around where they can get me a few measurements? See the image below for what I'm after.

Thanks!

Got one...

I'm assuming A is the bolt centers of the upper A arm which is 29.5"

B is the centers of the top motor mount bolt holes, 16.75"

C is the centers of the bottom motor mount holes, 13.5"

D is the depth of the section, 2.5"

I these aren't the ones, let me know or if you need more.

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My car viewtopic.php?f=37&t=16434
1930s Style Sports Car viewtopic.php?f=36&t=16888

Thanks! I'm trying to get a sense of how much cutting to the existing frame rails would be necessary to transplant the subframe onto a different car. I think that I can work off those numbers just fine!

Hey Run87k, as long as you're up...

--The spacing between the lower control arm pivots.

--The vertical distance between the UCA pivots and the LCA pivots.

There are conflicting figures out there, and I don't know which is right.

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Locost builder and adventurer, and founder (but no longer owner) of Kinetic Vehicles

It is 26" between the lower control arm holes. They are slotted so I picked the center of the slots.

The vertical ditance between upper and lower is 7". My subframe is from a 1996.

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My car viewtopic.php?f=37&t=16434
1930s Style Sports Car viewtopic.php?f=36&t=16888

Thanks!

Also keep in mind that in 99 they upgraded the geometry in the front end and that's what everyone is using nowadays.

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mobilito ergo sum
I drive therefore I am

I can explain it to you,
but I can't understand it for you.

Don't leave us in suspenders, carguy, what did they upgrade it to? I would use them nowadays, if I knew what they were.

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Locost builder and adventurer, and founder (but no longer owner) of Kinetic Vehicles

I don't know the specifics, I've slept since then, but I'll bet Flyin Miata knows. All I know is that they changed the mounting points for the arms.

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mobilito ergo sum
I drive therefore I am

I can explain it to you,
but I can't understand it for you.

Just found this on Miata.net. http://forum.miata.net/vb/showthread.php?t=145796&highlight=NB+subframe
Hope it helps.

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Mike - Read my story at http://twinlakesseven.blogspot.com/

Now that I think about it guys I think I remember that The NB subframe is changed slightly be relocating the mounting points for the control arms to increase caster (upper back 3 mm and lower forward 2.1 mm). The lower points were also lowered to lower the roll center (5.7 mm).

The arms themselves and the upright is not change. The lateral inclination of the steering axis is not changed.

Hope this helps.

Smart alec? Not me!!

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mobilito ergo sum
I drive therefore I am

I can explain it to you,
but I can't understand it for you.

Note that the upper control arm pivot axis is not parallel to the lower control arm pivot axis. The upper control arm pivot axis is sloped for anti-dive. With that in mind, can you please clarify which points the 7" distance refers to?

I haven't verified these dimensions, but check out the pdf's under the "Miata Suspension Dimensions" section on the following page:

http://enderw88.wordpress.com/drawings/

Mark

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Photo gallery of my completed Locost:
https://plus.google.com/photos/10397358 ... banner=pwa

I measured the front holes. I also used a tape measure so a 3mm difference would be difficult to spot. I think krebs original post was just looking for ballpark numbers.

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My car viewtopic.php?f=37&t=16434
1930s Style Sports Car viewtopic.php?f=36&t=16888

viewtopic.php?f=5&t=1409&hilit=eurokraft
we have all these measurements in this topic
cheers, Tony