Through-floor subs...a diy series

[MAT88GT]

Sharing this with my mma brothers and sisters ;)

2x3x0.120" subframe connectors...52" long at this point
The backsides will conjoin the rear subframe rail to the back of the lower torque box. The front of the connector will actually lay inside the subframe rail

Seat braces will be 1.5x1.5x0.080" square stock laying in notches cut into the subs

There will be kickers spanning from the main hoop and front cage footings to the subs...again 2x3" stuff

The holes in the floor will be replaced with fresh mild steel

http://www.mustangcentral.net/mat/subs/matzillasubs01.JPG

http://www.mustangcentral.net/mat/subs/matzillasubs02.JPG

http://www.mustangcentral.net/mat/subs/matzillasubs03.JPG

http://www.mustangcentral.net/mat/subs/matzillasubs04.JPG

http://www.mustangcentral.net/mat/subs/matzillasubs05.JPG

http://www.mustangcentral.net/mat/subs/matzillasubs06.JPG

http://www.mustangcentral.net/mat/subs/matzillasubs07.JPG

http://www.mustangcentral.net/mat/subs/matzillasubs08.JPG

note: you can't run the subframe connector directly from the rear to front sub because they're offset....the front subframe is closer to the rocker

[Tom]

Thanks Mat!

[MAT88GT]

Todays update

My starting point after the late night fab fest lasting until 2am last night :)
http://www.mustangcentral.net/mat/subs/matzillasubs09.JPG

I finished cutting the floor...
http://www.mustangcentral.net/mat/subs/matzillasubs10.JPG

"notched" the 2x3 so it would drop down into the front subframe, leaving about 3/16" exposed above the front floor. This also dropped the rear quite a bit. The cut measures 1" front and 1 3/8" rear, 18" long to match the subframe.
http://www.mustangcentral.net/mat/subs/matzillasubs11.JPG

Test fit
http://www.mustangcentral.net/mat/subs/matzillasubs12.JPG

Here is now she sits after the notching!
http://www.mustangcentral.net/mat/subs/matzillasubs13.JPG

Dropped in the rear
http://www.mustangcentral.net/mat/subs/matzillasubs14.JPG

Shot from under the rear section
http://www.mustangcentral.net/mat/subs/matzillasubs15.JPG

Just behind the front subframe
http://www.mustangcentral.net/mat/subs/matzillasubs16.JPG

Smoothed up the floor a bit...shows the notch in relation to the floor/sub
http://www.mustangcentral.net/mat/subs/matzillasubs17.JPG

Test fit with the seat all the way forward
http://www.mustangcentral.net/mat/subs/matzillasubs18.JPG

all the way back...plenty of room
http://www.mustangcentral.net/mat/subs/matzillasubs19.JPG

dirty seats!
http://www.mustangcentral.net/mat/subs/matzillasubs20.JPG

This cross brace will tie the subframe into the main hoop footing plate and main hoop bar once the cage is installed. This is a HUGE saftey enhancement over the typical setup with just a 6x6 plate for the main hoop, which can shoot through the floor if you DO actually roll the car.
http://www.mustangcentral.net/mat/subs/matzillasubs21.JPG

Front will also have crossbraces for the front footings
http://www.mustangcentral.net/mat/subs/matzillasubs22.JPG

Happy :)
http://www.mustangcentral.net/mat/subs/matzillahappysubs.JPG

[Nick 1]

Looking good Mat !!!!!!!!!!!!!!




Nick 1

[MAT88GT]

that's on the agenda for next weekend :) The cold weather will be here soon!!!

[MAT88GT]

Since I knew the seat as all squared away in terms of clearance, I could go forward today with the seat cross brace.

Seat cut for the 16x1.5x1.5x0.8something inch crossbrace
http://www.mustangcentral.net/mat/subs/matzillasubs23.JPG

Crossbrace in possition
http://www.mustangcentral.net/mat/subs/matzillasubs24.JPG

rear underside
http://www.mustangcentral.net/mat/subs/matzillasubs25.JPG

Front underside, looking to the rear of the car...very minimal lost in ground clearance
http://www.mustangcentral.net/mat/subs/matzillasubs26.JPG

Top view
http://www.mustangcentral.net/mat/subs/matzillasubs27.JPG