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#1030148 - 09/30/15 09:16 PM Frame Notching question  
Joined: Aug 2014
Posts: 248
Keithss Offline
Member
Keithss  Offline
Member

Joined: Aug 2014
Posts: 248
Jackson,mi
Does notching the rear of the frame for larger tire size weaken the frame? To me, even with a 1/4 inch plate wielded in, it seem like it would still want to twist.
I am thinking about doing it, but concerned about strength.

#1030194 - 10/02/15 02:26 AM Re: Frame Notching question [Re: Keithss]  
Joined: Oct 2007
Posts: 1,170
pazzo1969 Offline
Member
pazzo1969  Offline
Member

Joined: Oct 2007
Posts: 1,170
Mableton, GA
did a few gbodies, this was my last one. click on link below it will take you to some pics. there should be about 10 there, just hit the right arrow on the pic to continue. this notch went all the way to the center of the frame. then re-welded the factory piece back on, i did use 1/4" plate at the notch backs at the front and rear. not shown, lost pics. i hole sawed 3 1 1/2" holes and put tubing thru the frame and welded them in. really strong result.
http://s213.photobucket.com/user/pazzo19...sort=3&o=36


President Wicked Rides/Wicked Montes Georgia chapter
#1030195 - 10/02/15 02:27 AM Re: Frame Notching question [Re: Keithss]  
Joined: Feb 2002
Posts: 4,215
Jameson Offline
15+ Year
Jameson  Offline
15+ Year
Member

Joined: Feb 2002
Posts: 4,215
Elizabeth City, NC
Its reinforced when it is done... And most also add bracing as well. But honestly all the torsion of the frame is located in the middle, not behind the tires. Frankly the back end of the chassis is not doing much as the control arm pick up points are forward of the axle. Its not like a leaf spring car that the rear frame rails support the vehicle.


1988 Monte Carlo SS Eaton 112 5.3/T56 swap, Way to many mods to list.
2015 GMC Sierra Denali



#1030202 - 10/02/15 03:46 AM Re: Frame Notching question [Re: Keithss]  
Joined: May 2009
Posts: 685
RenoReno2 Offline
10+ Year
RenoReno2  Offline
10+ Year
Member

Joined: May 2009
Posts: 685
Chicago, IL
My only concern with doing this on a car that's driven on the road is getting rear ended the frame has been severely compromised in this situation


88 Monte SS
#1030546 - 10/10/15 08:52 AM Re: Frame Notching question [Re: Keithss]  
Joined: Mar 2012
Posts: 78
TerMonteNatorSS1986 Offline
Member
TerMonteNatorSS1986  Offline
Member

Joined: Mar 2012
Posts: 78
Edmonton, Alberta
I don't know the exact setup, but usually in metal fabrication, you want to avoid sharp angles as much as you can in order to avoid stress lines concentrating in one area, and causing a fracture.


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