Hood Welding / Design /Theory.. Chime in Please!

Thread Tools
 
Search this Thread
 
Old Apr 2, 2009 | 09:10 PM
  #1  
robble36's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jan 2007
Posts: 679
Likes: 0
From: Las Vegas, NV, USA
Default Hood Welding / Design /Theory.. Chime in Please!

i have an OEM 96-98 civic hood and i am going to pin it down with hood pins.. but i have this idea in mind that i'd like to share and get some opinions on..



Pretend this is the hood that is up for discussion.. ( although it does not really matter )
- the red lines are where it is going to be cut to remove the overall "skeleton of the hood..
- After this is done the hood will become pretty flimsy i am aware.
- i am really curious in the weight savings and just how cheap of a modification this would be..

IDEA:



the red bars represent some kind of metal sheets or Plates that will reinforce the hood overall.. as for applying them i was thinking tac weld or some kind of welding or anything this is the part where i need some help.. I am also afraid that welding will burn through the other side and just destroy the hood.. so any experts outt there or people that can enhance my idea and give me a hand it would be greatly appreciated..

PS excuse the crappy MS paint status haha but i think you get the idea...
Reply
Old Apr 2, 2009 | 09:25 PM
  #2  
DESTROYER's Avatar
Honda-Tech Member
 
Joined: Apr 2006
Posts: 622
Likes: 0
From: MESA, AZ, USA
Default Re: Hood Welding / Design /Theory.. Chime in Please!

If your going to add in another skeleton, why remove the oem to begin with?
Reply
Old Apr 2, 2009 | 10:20 PM
  #3  
redboost10's Avatar
Honda-Tech Member
 
Joined: Sep 2003
Posts: 7,056
Likes: 0
Default Re: Hood Welding / Design /Theory.. Chime in Please!

we have did this before. it was for a dirt track car. yeah it saved like 7 or 8 lbs, it wasnt as flimsy as youd think beings it still has the perimeter brace.

edit: we didnt add extra brace like you plan to do though, guess i should have been more informative

Last edited by redboost10; Apr 3, 2009 at 07:22 AM.
Reply
Old Apr 3, 2009 | 04:40 AM
  #4  
weiRtech's Avatar
OG Fabricator
 
Joined: Feb 2005
Posts: 1,864
Likes: 1
From: Burlington, Ont., Canada
Default Re: Hood Welding / Design /Theory.. Chime in Please!

just get a cf hood. my fiber images hood only weighs 13 lbs compared to the 35 lb obese oem hood.
Reply
Old Apr 3, 2009 | 07:10 AM
  #5  
jjspec's Avatar
Honda-Tech Member
 
Joined: Jun 2006
Posts: 1,371
Likes: 0
From: Macon, Ga
Default Re: Hood Welding / Design /Theory.. Chime in Please!

You stand a good chance of localized warpage with the welding I would think. May want to get a "junk" hood and try it.
Reply
Old Apr 3, 2009 | 08:40 AM
  #6  
mrdeadman's Avatar
They let me pick
 
Joined: Jun 2005
Posts: 3,690
Likes: 1
Default Re: Hood Welding / Design /Theory.. Chime in Please!

You can get a CF hood and paint it so you can't tell it is CF. This would save more weight than the sheet metal, and you were going to pin it anyway.
Reply
Old Apr 3, 2009 | 10:07 AM
  #7  
maskednegator's Avatar
Junior Member
 
Joined: Jun 2002
Posts: 430
Likes: 0
From: san diego, ca, 92131
Default Re: Hood Welding / Design /Theory.. Chime in Please!

Your skeleton has no strength in the direction perpendicular to the bars. It would provide almost no strength if someone sat on the hood. For it to provide any real funciton, you'd have to add some triangulation to it in the same fashion as the oem skeleton.
Cutting out a skeleton to weld in an inferior one is a dumb idea.
Reply
Old Apr 3, 2009 | 11:18 AM
  #8  
essex's Avatar
Honda-Tech Member
 
Joined: Apr 2002
Posts: 2,126
Likes: 0
Default Re: Hood Welding / Design /Theory.. Chime in Please!

You could just drill the skeleton full of holes to lighten it up but I think it will be OK if you remove it.
Reply
Old Apr 3, 2009 | 12:24 PM
  #9  
robble36's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jan 2007
Posts: 679
Likes: 0
From: Las Vegas, NV, USA
Default Re: Hood Welding / Design /Theory.. Chime in Please!

Originally Posted by redboost10
we have did this before. it was for a dirt track car. yeah it saved like 7 or 8 lbs, it wasnt as flimsy as youd think beings it still has the perimeter brace.

edit: we didnt add extra brace like you plan to do though, guess i should have been more informative
so you just cut the skeleton out and left the perimeter skeleton correct? the metal didnt start folding or creasing after prolonged use of taking the hood on and off the car?

Originally Posted by weiRtech
just get a cf hood. my fiber images hood only weighs 13 lbs compared to the 35 lb obese oem hood.
i have a VIS CF one.. WHICH IS FORSALE BTW haha and a painted Fiberglass one i just like to try new things and come upon spare parts all the time.. I also think i can get this to be almost as light as my VIS CF one which is heavier than i expected.

Originally Posted by mrdeadman
You can get a CF hood and paint it so you can't tell it is CF. This would save more weight than the sheet metal, and you were going to pin it anyway.
My fiberglass hood serves that purpose ... i am also quite sure that this route is way way way cheaper than acquiring a CF hood and going to a paint shop to get it nicely painted to match the car...

Originally Posted by maskednegator
Your skeleton has no strength in the direction perpendicular to the bars. It would provide almost no strength if someone sat on the hood. For it to provide any real funciton, you'd have to add some triangulation to it in the same fashion as the oem skeleton.
Cutting out a skeleton to weld in an inferior one is a dumb idea.
good point.. but you dont think the metal plates spanning from the botton of the hood to the top would provide it horizontal strength instead of just veritcal strength? i mean i am not about to have people lay and sun-tan on this hood ha

Originally Posted by essex
You could just drill the skeleton full of holes to lighten it up but I think it will be OK if you remove it.
in essence that would probably fall apart by itself towards the finished product hahah take a chance and look @ the skeleton itself u can grab it and like bend it almost
Reply
Old Apr 3, 2009 | 08:04 PM
  #10  
pauld's Avatar
Honda-Tech Member
 
Joined: Feb 2007
Posts: 188
Likes: 0
From: trail, bc, canada
Default Re: Hood Welding / Design /Theory.. Chime in Please!

Instead of welding in a "mini skeleton" what about attaching one using the urethane based body panel adhesive that bodyshops use now in place of spot welds?? No warpage, stronger than spot welds, fairly cheap.... Just an idea so your skeleton wouldnt have that welding warpage issue.
Reply
Old Apr 3, 2009 | 08:57 PM
  #11  
redboost10's Avatar
Honda-Tech Member
 
Joined: Sep 2003
Posts: 7,056
Likes: 0
Default Re: Hood Welding / Design /Theory.. Chime in Please!

no it did not. the hood is not like the rest of the body parts. hoods of all makes of vehicles tends to be built with a little bit thicker material than say fenders/quarter panels.
Reply
Old Apr 4, 2009 | 05:55 AM
  #12  
downest's Avatar
Honda-Tech Member
 
Joined: Jul 2005
Posts: 1,637
Likes: 3
From: West Kingston, RI
Default Re: Hood Welding / Design /Theory.. Chime in Please!

You're going to have to get it painted either way, metal or not, once you weld on it.
Reply
Old Apr 4, 2009 | 07:13 PM
  #13  
robble36's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jan 2007
Posts: 679
Likes: 0
From: Las Vegas, NV, USA
Default Re: Hood Welding / Design /Theory.. Chime in Please!

Originally Posted by pauld
Instead of welding in a "mini skeleton" what about attaching one using the urethane based body panel adhesive that bodyshops use now in place of spot welds?? No warpage, stronger than spot welds, fairly cheap.... Just an idea so your skeleton wouldnt have that welding warpage issue.
i will look into that .. thanks good idea!! still need to figure out what kind of braceing i will be using

Originally Posted by redboost10
no it did not. the hood is not like the rest of the body parts. hoods of all makes of vehicles tends to be built with a little bit thicker material than say fenders/quarter panels.
cool you convinced me i am just going to try this because it is the result of cutting the hood in the first place .. thanks for the input!

Originally Posted by downest
You're going to have to get it painted either way, metal or not, once you weld on it.
the underside being painted wouldnt matter to me but the Exterior is what i care about .
Reply
Old Apr 6, 2009 | 06:55 PM
  #14  
got wide's Avatar
Honda-Tech Member
 
Joined: Mar 2007
Posts: 433
Likes: 0
From: dayton, oh, usa
Default Re: Hood Welding / Design /Theory.. Chime in Please!

Originally Posted by robble36


the underside being painted wouldnt matter to me but the Exterior is what i care about .
you would have to paint the exterior of the hood as well. the heat from welding to the bottom of it will burn off the paint on the top of it.
Reply
Old Apr 6, 2009 | 08:59 PM
  #15  
downest's Avatar
Honda-Tech Member
 
Joined: Jul 2005
Posts: 1,637
Likes: 3
From: West Kingston, RI
Default Re: Hood Welding / Design /Theory.. Chime in Please!

Originally Posted by got wide
you would have to paint the exterior of the hood as well. the heat from welding to the bottom of it will burn off the paint on the top of it.
Thank you.
Reply
Old Apr 7, 2009 | 08:14 AM
  #16  
mattminer's Avatar
Junior Member
 
Joined: Dec 2004
Posts: 108
Likes: 0
Default Re: Hood Welding / Design /Theory.. Chime in Please!

weld != glue...it gets pretty darn hot the paint iwll just melt/boil/flame right off it

M@
Reply
Old Apr 17, 2009 | 04:19 PM
  #17  
89civicdx's Avatar
Honda-Tech Member
20 Year Member
Liked
 
Joined: Jan 2001
Posts: 2,273
Likes: 3
Default Re: Hood Welding / Design /Theory.. Chime in Please!

Hey hey

I cut up a 89 civic hood today.....really simple the center section is held on by glue. Just cut the outside and put it off the glue....I did cut a little too much on one spot and it almost cut thrpugh the other side making a 1 inch mark ...but the rest of the hood you can't even tell.

before cutting it weighed about 28lbs after around 21 + have to the removal of the latch on the car and cable this thing has some bondo so that probaly weighed a bit too.






Last edited by 89civicdx; Apr 17, 2009 at 04:29 PM.
Reply
Old Apr 17, 2009 | 09:44 PM
  #18  
robble36's Avatar
Thread Starter
Honda-Tech Member
 
Joined: Jan 2007
Posts: 679
Likes: 0
From: Las Vegas, NV, USA
Default Re: Hood Welding / Design /Theory.. Chime in Please!

awesome just what i was looking for... looks good but the Weight loss doesnt seem that drastic.. i still have not attempted this yet just too lazy honestly .. did you use a Die grinder? how long did it take you (estimated) ? thanks again for chiming in!! definitely doing this sunday now haha
Reply
Old Apr 17, 2009 | 10:29 PM
  #19  
1200 Hobos's Avatar
Honda-Tech Member
iTrader: (7)
 
Joined: Sep 2006
Posts: 5,996
Likes: 1
From: CA
Default Re: Hood Welding / Design /Theory.. Chime in Please!

If your going to add skeleton I think you'd be better off with one diagonal brace from corner to corner instead of 3 straight up and down.
Reply
Old Apr 18, 2009 | 08:16 AM
  #20  
89civicdx's Avatar
Honda-Tech Member
20 Year Member
Liked
 
Joined: Jan 2001
Posts: 2,273
Likes: 3
Default Re: Hood Welding / Design /Theory.. Chime in Please!

Originally Posted by robble36
awesome just what i was looking for... looks good but the Weight loss doesnt seem that drastic.. i still have not attempted this yet just too lazy honestly .. did you use a Die grinder? how long did it take you (estimated) ? thanks again for chiming in!! definitely doing this sunday now haha

Hi I used a angle grinder with a 4 & 1/2" cut off wheel

it took about 5-10 minutes to cut it. I don't think you need a brace on a civic hood.

I cut this vent but I screwed it up ...its a bit crooked. even though i measure like 10 times lol
Reply
Old Apr 18, 2009 | 09:37 AM
  #21  
whoa its len 2's Avatar
Honda-Tech Member
 
Joined: Aug 2002
Posts: 4,174
Likes: 0
From: San Diego, CA
Default Re: Hood Welding / Design /Theory.. Chime in Please!

Id hate to see you in a front end collision. The stock hood is meant to crumple on impact. You can see the bracing design how it has "dents" in the middle and how the skeleton disperses the force from the foward most point to the entire rear. Adding bracing like youve showed will throw all the force straight though the middle. If the impact is hard enough, the hood will break off its brackets and travel straight through your face. Knock on wood.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
GSRCRXsi
Road Racing / Autocross & Time Attack
26
Jan 4, 2017 06:56 PM
89 pos
Acura Integra
7
Nov 17, 2005 04:35 PM
EP34ME
Acura RSX DC5 & Honda Civic EP3
9
Aug 5, 2005 06:11 AM
93HatchCali
Honda Civic / Del Sol (1992 - 2000)
86
Nov 25, 2003 08:33 AM
tolowhb
Honda CRX / EF Civic (1988 - 1991)
6
Aug 8, 2002 10:36 PM




All times are GMT -8. The time now is 08:39 PM.