Butterfly brace challenge (need advise)

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gwoods
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Butterfly brace challenge (need advise)

Postby gwoods » Sat Oct 18, 2014 5:51 pm

I started to install my flying Miata butterfly brace and frame rails and quickly ran into a problem.

I know my Miata was previously slammed and it appears that it has also bee bottomed out hard on a speed bump. The subframe rails a pretty crushed on both sides in the same spot. They are now too wide at this point for the brace to fit around them.

I have tried beating them skinny with assorted hammers and wood and metal blocks. I have tried jacking the frame rail around the bludge. I have tried lowering the car onto the frame rails with a woodblock under them.

I have concluded that something must be shaved. I am thinking I will notch the fm brace because I don't want to weaken the cars subframe any further.

I appreciate any feed back and advise. I am also reaching out to flying Miata for advise.

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gwoods
Posts: 3896
Joined: Fri Jul 27, 2007 11:57 am
Car: 2013 Infiniti M37x
1999 Nissan Altima SE limited 5spd
1992 Miata (soon to be turbo)
1965 Cj-5 with 327 v8
2012 Toyota Sequoia Limited
Location: Phoenix

Re: Butterfly brace challenge (need advise)

Postby gwoods » Sun Oct 19, 2014 4:55 pm

After some searching my frame is not bad! This is common damage on a na. Two options pound it out or cut it off. I saw some guys cut it out and weld on a steel box in its place. I also saw cutting where it's crushed and prying it down. The frame rail on the underside that is crushed is not structural to the car but supports the floor pan

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gwoods
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Car: 2013 Infiniti M37x
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1965 Cj-5 with 327 v8
2012 Toyota Sequoia Limited
Location: Phoenix

Re: Butterfly brace challenge (need advise)

Postby gwoods » Sun Oct 19, 2014 8:01 pm

Google

Dealing with crushed "Frame Rails" on your Miata

See really damaged frame rails on Miata roadster . Net

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gwoods
Posts: 3896
Joined: Fri Jul 27, 2007 11:57 am
Car: 2013 Infiniti M37x
1999 Nissan Altima SE limited 5spd
1992 Miata (soon to be turbo)
1965 Cj-5 with 327 v8
2012 Toyota Sequoia Limited
Location: Phoenix

Re: Butterfly brace challenge (need advise)

Postby gwoods » Mon Oct 20, 2014 11:37 am

Found a great tool for straightening metal in my air tools drawer. I used an air hammer with the chisel attachment and really got the rails straight!


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I will paint to prevent rust prior to install

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gwoods
Posts: 3896
Joined: Fri Jul 27, 2007 11:57 am
Car: 2013 Infiniti M37x
1999 Nissan Altima SE limited 5spd
1992 Miata (soon to be turbo)
1965 Cj-5 with 327 v8
2012 Toyota Sequoia Limited
Location: Phoenix

Re: Butterfly brace challenge (need advise)

Postby gwoods » Mon Oct 20, 2014 11:37 am

Found a great tool for straightening metal in my air tools drawer. I used an air hammer with the chisel attachment and really got the rails straight!


Image

Image
Image

I will paint to prevent rust prior to install

User avatar
gwoods
Posts: 3896
Joined: Fri Jul 27, 2007 11:57 am
Car: 2013 Infiniti M37x
1999 Nissan Altima SE limited 5spd
1992 Miata (soon to be turbo)
1965 Cj-5 with 327 v8
2012 Toyota Sequoia Limited
Location: Phoenix

Re: Butterfly brace challenge (need advise)

Postby gwoods » Mon Oct 20, 2014 6:41 pm

What I lack in friends I make up for in jack stands

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Got it just right!

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frapjap
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Re: Butterfly brace challenge (need advise)

Postby frapjap » Tue Oct 21, 2014 7:10 am

Impressive man. Nice improvisation! Thats the one thing I'd really like to have had in my Miata. Greg loves his.

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gwoods
Posts: 3896
Joined: Fri Jul 27, 2007 11:57 am
Car: 2013 Infiniti M37x
1999 Nissan Altima SE limited 5spd
1992 Miata (soon to be turbo)
1965 Cj-5 with 327 v8
2012 Toyota Sequoia Limited
Location: Phoenix

Re: Butterfly brace challenge (need advise)

Postby gwoods » Tue Oct 21, 2014 7:17 am

It came with hardware from the original owner and its all 9/16ths grade 8. It feels so strange to us SAE hardware on a Metric car LOL. some of the washers were bent and I pounded them straight I should have waited they were bent perfectly to conform to the raises and falls of the Miata floor board. I did replace all the nuts with nylon lock nuts and I'm using Loctite blue.

I used SPAM & bath clear silicone to cover the bolts and in the hole to prevent rust and water from coming inside the car if I ever drive it in rain. I drove it all day Sunday without the top installed and raised the rainstorm home Sunday night.

Its important to install the butterfly brace and the frame rail at the same time because they share 8 bolts and have to line up perfectly. Install the two rear most bolts first because they have a chance of coming up outside the passenger compartment if you have the brace too far back on the car.

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gwoods
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1965 Cj-5 with 327 v8
2012 Toyota Sequoia Limited
Location: Phoenix

Re: Butterfly brace challenge (need advise)

Postby gwoods » Tue Oct 21, 2014 11:53 am

Finished it up.

Caulked around the holes I drilled

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1100 car! Since I had the flat black spray paint out for the frame rails I finished my fenders by adding the black strip at the bottom

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Hardware is kind of long? I started with the back inside bolts first. Then did the front inside bolts. The frame rails and butterfly share these bolts so if they line up your good to go

Image

The car is completely different feels like a racecar

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gwoods
Posts: 3896
Joined: Fri Jul 27, 2007 11:57 am
Car: 2013 Infiniti M37x
1999 Nissan Altima SE limited 5spd
1992 Miata (soon to be turbo)
1965 Cj-5 with 327 v8
2012 Toyota Sequoia Limited
Location: Phoenix

Re: Butterfly brace challenge (need advise)

Postby gwoods » Fri Oct 31, 2014 4:19 pm

Update after about 200 miles of driving. The cars top speed has been lowered to just under 90mph and it got hot trying it. I bottom out on a lot of things now even at my very sensible stock ride height. The handling is amazing!

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PapaSmurf2k3
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Re: Butterfly brace challenge (need advise)

Postby PapaSmurf2k3 » Sun Nov 23, 2014 9:13 am

What's wrong with your engine?

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gwoods
Posts: 3896
Joined: Fri Jul 27, 2007 11:57 am
Car: 2013 Infiniti M37x
1999 Nissan Altima SE limited 5spd
1992 Miata (soon to be turbo)
1965 Cj-5 with 327 v8
2012 Toyota Sequoia Limited
Location: Phoenix

Re: Butterfly brace challenge (need advise)

Postby gwoods » Sun Nov 23, 2014 12:42 pm

No turbo yet

I think the real evil is the automatic transmission. It will not shift into third at wot
.


I replaced the fuel filter. Im thinking about replacing the vacuum module and line.

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PapaSmurf2k3
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Re: Butterfly brace challenge (need advise)

Postby PapaSmurf2k3 » Sun Nov 23, 2014 1:29 pm

Ahhhh.
I always forget you have an autotragic. I still don't know why you do though, or why anyone would.

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gwoods
Posts: 3896
Joined: Fri Jul 27, 2007 11:57 am
Car: 2013 Infiniti M37x
1999 Nissan Altima SE limited 5spd
1992 Miata (soon to be turbo)
1965 Cj-5 with 327 v8
2012 Toyota Sequoia Limited
Location: Phoenix

Re: Butterfly brace challenge (need advise)

Postby gwoods » Sun Nov 23, 2014 6:01 pm

Image

You ever had to row gears with a great Dane in your lap?

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PapaSmurf2k3
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Re: Butterfly brace challenge (need advise)

Postby PapaSmurf2k3 » Sun Nov 23, 2014 6:27 pm

Can't say I have... but I have rowed gears with a redhead in my lap ;)


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