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Bumpers
Jul 19, 2017 7:51:16 GMT -5
Post by stellis124 on Jul 19, 2017 7:51:16 GMT -5
I have a early 80's bumper (steel backed) (dont remember what its off of)
our rules say loaded bumpers allowed, i want to keep the bumper some what lite, as its for a compact. is a fully seam welded bumper almost as strong as a loaded bumper?
also to cut back on weight has any one tried to cover all the holes in a bumper and load it right to the brim with expanding spray foam?
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Post by Jeffrey7x on Jul 23, 2017 3:27:08 GMT -5
I have a early 80's bumper (steel backed) (dont remember what its off of) our rules say loaded bumpers allowed, i want to keep the bumper some what lite, as its for a compact. is a fully seam welded bumper almost as strong as a loaded bumper? also to cut back on weight has any one tried to cover all the holes in a bumper and load it right to the brim with expanding spray foam? For your use I'd just seam weld it and go. |
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88x
Feature Winner
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Post by 88x on Jul 23, 2017 22:58:18 GMT -5
seam welded is not as strong as stuffed with seam welding. and I dont think foam is my going to do much at all
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Bumpers
Aug 6, 2017 15:51:37 GMT -5
via mobile
Post by josesdonkey on Aug 6, 2017 15:51:37 GMT -5
Not sure if i missed it or i am looking in the wrong area...
My local rules say we can run a 4"x4" square tube 50" long as a front bumper. We can also reinforce 6" of the frame to "help keep the bumper on". this is my first pro mini build. Any suggestions for reinforcing the 6"?
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Bumpers
Aug 6, 2017 20:52:39 GMT -5
Post by STROMI 121 on Aug 6, 2017 20:52:39 GMT -5
Not sure if i missed it or i am looking in the wrong area... My local rules say we can run a 4"x4" square tube 50" long as a front bumper. We can also reinforce 6" of the frame to "help keep the bumper on". this is my first pro mini build. Any suggestions for reinforcing the 6"? What kind of car are you building? |
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Post by stellis124 on Aug 7, 2017 7:02:19 GMT -5
Not sure if i missed it or i am looking in the wrong area... My local rules say we can run a 4"x4" square tube 50" long as a front bumper. We can also reinforce 6" of the frame to "help keep the bumper on". this is my first pro mini build. Any suggestions for reinforcing the 6"? sounds similar to rules i run. are your rules Impact motor sports pro mini rules? |
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Bumpers
Aug 7, 2017 10:38:03 GMT -5
via mobile
Post by josesdonkey on Aug 7, 2017 10:38:03 GMT -5
Not sure if i missed it or i am looking in the wrong area... My local rules say we can run a 4"x4" square tube 50" long as a front bumper. We can also reinforce 6" of the frame to "help keep the bumper on". this is my first pro mini build. Any suggestions for reinforcing the 6"? What kind of car are you building? 97 camry |
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Bumpers
Aug 7, 2017 10:40:33 GMT -5
via mobile
Post by josesdonkey on Aug 7, 2017 10:40:33 GMT -5
Not sure if i missed it or i am looking in the wrong area... My local rules say we can run a 4"x4" square tube 50" long as a front bumper. We can also reinforce 6" of the frame to "help keep the bumper on". this is my first pro mini build. Any suggestions for reinforcing the 6"? sounds similar to rules i run. are your rules Impact motor sports pro mini rules? I heard our fair can't afford impact to run our derby. So I think they pulled a lot of the rules from them. |
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Bumpers
Aug 7, 2017 11:03:13 GMT -5
via mobile
Post by stellis124 on Aug 7, 2017 11:03:13 GMT -5
sounds similar to rules i run. are your rules Impact motor sports pro mini rules? I heard our fair can't afford impact to run our derby. So I think they pulled a lot of the rules from them. Is your fair Welland? Niagara exhibition I think they call it? |
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Bumpers
Aug 7, 2017 11:42:55 GMT -5
via mobile
Post by josesdonkey on Aug 7, 2017 11:42:55 GMT -5
[/quote]
Is your fair
Welland? Niagara exhibition I think they call it? [/quote]
No. Uxbridge. roughly 30 min west of lindsay
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Bumpers
Aug 7, 2017 12:58:01 GMT -5
via mobile
Post by stellis124 on Aug 7, 2017 12:58:01 GMT -5
Is your fair Welland? Niagara exhibition I think they call it? [/quote] No. Uxbridge. roughly 30 min west of lindsay [/quote] Oh I see I see, that's too north for me I'm down in the Niagara region of Ontario. But anyways to answer your question, Remove old bumper and brackets, should be left with 3 screws sticking out the front of the frame, cut those off and trim up the metal that is folding it. Once that's trimmed you can put a bumper shock in 2"x5" and make it 6" long that will go into the frame and for your bumper shock. Weld up your 4x4 to front of those bumper shocks. Hammer it in then put a nice bead of weld all the way around where the back of your 4x4 and shock goes into the frame. Then weld 2 plates top and bottom to your 4x4 and the frame. Don't go past the 6" mark on the frame. 9.5" makes a good plate do that top and bottom. Sides can be either a piece of 4x4 angle iron welded or use a 3" gusset from the back of the bumper to the frame. Any questions and I can up load a phot of what my bumper looks like as a guid line. I'd post it in Toyota thread tho. Good luck |
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Post by josesdonkey on Aug 8, 2017 14:49:48 GMT -5
Is your fair Welland? Niagara exhibition I think they call it? No. Uxbridge. roughly 30 min west of lindsay [/quote] Oh I see I see, that's too north for me I'm down in the Niagara region of Ontario. But anyways to answer your question, Remove old bumper and brackets, should be left with 3 screws sticking out the front of the frame, cut those off and trim up the metal that is folding it. Once that's trimmed you can put a bumper shock in 2"x5" and make it 6" long that will go into the frame and for your bumper shock. Weld up your 4x4 to front of those bumper shocks. Hammer it in then put a nice bead of weld all the way around where the back of your 4x4 and shock goes into the frame. Then weld 2 plates top and bottom to your 4x4 and the frame. Don't go past the 6" mark on the frame. 9.5" makes a good plate do that top and bottom. Sides can be either a piece of 4x4 angle iron welded or use a 3" gusset from the back of the bumper to the frame. Any questions and I can up load a phot of what my bumper looks like as a guid line. I'd post it in Toyota thread tho. Good luck [/quote] Pictures would be appreciated. Yes I think this would be better in the Toyota section. Sorry to hijack the thread! Carry on |
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Bumpers
Nov 20, 2017 10:22:24 GMT -5
Post by racedrvr27 on Nov 20, 2017 10:22:24 GMT -5
anyone run a 77 Bonneville bumper? backing looks decent, but crazy big vent holes in the center scare me. Going on a W-body, not allowed to load, will seam weld.
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boom61
Feature Winner
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Bumpers
Nov 20, 2017 11:49:52 GMT -5
Post by boom61 on Nov 20, 2017 11:49:52 GMT -5
Are you sure its a 77'? from what I've found 77-79' are flat and have vent holes but aren't too large. 80-81' are pointed and have large vent holes right next to each other in the center of the bumper. If its like the 80-81' bumpers I wouldn't run it unless they can be closed out.
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Bumpers
Nov 20, 2017 11:55:00 GMT -5
Post by racedrvr27 on Nov 20, 2017 11:55:00 GMT -5
Must be an 80-81 then, it has a point and the vents are rather large and right next to each other.
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