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Author Topic: What are specs for a seat back brace?  (Read 2200 times)
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tedgram
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« on: June 18, 2010, 08:05:41 PM »

 My seat back is three inches from the shoulder bar. Can I use 2 or 3 inch wide aluminum strapping? What square area on the seat back? Can the shoulder bar be drilled and tapped to hold the brace or should I use muffler clamps?
« Last Edit: June 18, 2010, 08:07:32 PM by tedgram » Logged
Cajun Kid
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« Reply #1 on: June 18, 2010, 09:51:42 PM »

We have never drilled any parts of the cage tubing,,, what we do is weld on tabs and bolt thru the tabs.

Muffler Clamps for a seat brace ?  Hmm I would not think so...but you need an answer from someone in Tech.

Charles
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tedgram
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« Reply #2 on: June 19, 2010, 04:52:14 PM »

  That gives me new insite on the bar side. How big a pad should I have where it bolts to the seat? Have you ever seen an I/O port seat back brace? Looks like that uses muffler clamps around the shoulder bar to hold the adjustable brace. I know I can fabricate my own for a lot less than $89 + shipping.

We have never drilled any parts of the cage tubing,,, what we do is weld on tabs and bolt thru the tabs.

Muffler Clamps for a seat brace ?  Hmm I would not think so...but you need an answer from someone in Tech.

Charles
« Last Edit: June 19, 2010, 05:02:06 PM by tedgram » Logged
Cajun Kid
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« Reply #3 on: June 19, 2010, 09:44:10 PM »

 That gives me new insite on the bar side. How big a pad should I have where it bolts to the seat? Have you ever seen an I/O port seat back brace? Looks like that uses muffler clamps around the shoulder bar to hold the adjustable brace. I know I can fabricate my own for a lot less than $89 + shipping.

We have never drilled any parts of the cage tubing,,, what we do is weld on tabs and bolt thru the tabs.

Muffler Clamps for a seat brace ?  Hmm I would not think so...but you need an answer from someone in Tech.

Charles

The Auto Power and the I O Port set uos are nice and even for $90   not a bad price, but you could make something just as strong and functional for less than $30 if you have a welder....

The Pad needs to be as wide as the flat part of the seat.. Mine is  about 12" wide.  If you are going to make a tube and plate/pad setup, I would think a 3 x 8 pad would be OK as a Minimun,, I would prefer a 3" x 10" pad if it will fit your seat back,, don't want the brace to spear through the seat back. I would also us at least 3/16 to 1/4 plate and bend a 90 degree lip to provide more strength.

Just my thoughts...

Good Luck

Charles
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B/CGALT, C/CGALT

LTA Record Holder and 200 Club Member
A/CBFALT, B/CBFALT, C/CBFALT, C/CFALT, C/CGALT,   E/CGALT, E/CFALT

Fastest Standing Mile at Ohio  203.343mph
Fastest Standing Mile at Maxton 196.967mph
Fastest Standing 1.5 Mile at Loring 213.624mph
Fastest Standing Mile at Loring 204.109mph

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Peter Jack
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« Reply #4 on: June 20, 2010, 12:06:19 AM »

I never use a tube pointing fore and aft, ie. into the driver's back. It is too rigid and can act as a spear, easily displacing or breaking a vertebrae. Use a flat plate and put a double break in it so that there is some give in the case of rear impact to absorb energy. Attach that to the shoulder bar on the cage and to a plate on the back of the seat at the other end. The plate should be substantial enough that it can dissipate some of the energy.

Pete
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tedgram
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« Reply #5 on: June 20, 2010, 09:10:14 AM »

  Thanks for the input guys your are a big help.
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Cajun Kid
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« Reply #6 on: June 20, 2010, 09:10:52 AM »

PJ,,, that is how we do it too,,,,

I will try to find a pic for Ted
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ECTA Record Holder Maxton
E/CBFALT, E/CBGALT, E/CGALT, E/CFALT, A/CGALT, C/CGALT, D/CGALT, C/CBGALT, B/CBGALT, C/CFALT
OHIO
B/CGALT, C/CGALT

LTA Record Holder and 200 Club Member
A/CBFALT, B/CBFALT, C/CBFALT, C/CFALT, C/CGALT,   E/CGALT, E/CFALT

Fastest Standing Mile at Ohio  203.343mph
Fastest Standing Mile at Maxton 196.967mph
Fastest Standing 1.5 Mile at Loring 213.624mph
Fastest Standing Mile at Loring 204.109mph

http://s261.photobucket.com/albums/ii43/cajunkid5690/

Blog    www.venablerodsandracing.com
email   venableracing@gmail.com
Cajun Kid
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« Reply #7 on: June 20, 2010, 09:38:21 AM »

Here is a pic of my seat back brace. It is bolted to the seat with FOUR  3/8 Grade 8 bolts.

The flat plate goes over the roll cage back/shoulder bar, is trimmed to fit and is bolted to 12" wide cage tab with THREE  more Grade 8 bolts. (I will try to find a better pic of that)



Charles

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ECTA Record Holder Maxton
E/CBFALT, E/CBGALT, E/CGALT, E/CFALT, A/CGALT, C/CGALT, D/CGALT, C/CBGALT, B/CBGALT, C/CFALT
OHIO
B/CGALT, C/CGALT

LTA Record Holder and 200 Club Member
A/CBFALT, B/CBFALT, C/CBFALT, C/CFALT, C/CGALT,   E/CGALT, E/CFALT

Fastest Standing Mile at Ohio  203.343mph
Fastest Standing Mile at Maxton 196.967mph
Fastest Standing 1.5 Mile at Loring 213.624mph
Fastest Standing Mile at Loring 204.109mph

http://s261.photobucket.com/albums/ii43/cajunkid5690/

Blog    www.venablerodsandracing.com
email   venableracing@gmail.com
Freud
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« Reply #8 on: June 20, 2010, 09:45:59 AM »

Cajun.........absolutely marvelous.

Quality is evident.

FREUD
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