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> drilling holes in hood hinges
Harpo
post May 17 2015, 07:18 AM
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I have seen a few hood hinges with holes drilled in them. I'm not sure if this is a cosmetic/decorative thing or for weight savings. For those of you that have performed this has it effected the structural integrity? I just think it looks cool. Here are some photos I found of someone else's hinges
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GeorgeRud
post May 17 2015, 08:31 AM
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Basically bling that's emulating lightening that might be useful for racing. It shouldn't affect the strength to any extent.

If you like the look, get out your hole saws!
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brant
post May 17 2015, 09:35 AM
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I chose to eliminate my hinges altogether for weight reasons.

1835 lbs and a metal car
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r_towle
post May 17 2015, 09:35 AM
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We did some calculations of hole drilling for lightening of a robot when we needed to make weight for a competition.....it's really a lot of holes to lose any measurable amount of weight.....not worth it.

But for the looks, go for it.
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Mueller
post May 17 2015, 09:53 AM
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If you look at the holes you will notice they are not just drilled out...they used a dimple die to add a slight "lip" , the bent edges allow it to get some strength/stiffness back.
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Jeff Hail
post May 23 2015, 11:40 PM
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Looks like a step drill with all the burrs. The steps will chamfer the edges a bit like that.



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screenguy914
post May 23 2015, 11:50 PM
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Not much weight savings, but racy.
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Exact weight reduction in the last pic of the gallery:
http://members.rennlist.org/911pcars/DrilledHingeHome.htm

Sherwood
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Krieger
post May 24 2015, 12:57 AM
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I did my fronts a few years back. I have had no issues. I have no hood springs though.
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campbellcj
post May 24 2015, 11:09 AM
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I thought about doing it on 914R but didn't bother - looks super cool but a lot of work for negligible weight and something hidden from view 99.9% of the time.

If anyone has a set they'd like to sell me though...
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gms
post May 25 2015, 09:39 AM
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QUOTE(brant @ May 17 2015, 10:35 AM) *

I chose to eliminate my hinges altogether for weight reasons.

1835 lbs and a metal car

(IMG:style_emoticons/default/agree.gif)
if you are racing and it is weight savings you are after pull the whole hinge assembly off. The drilled out brackets do look racy for the street car
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campbellcj
post May 25 2015, 09:59 AM
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No hinges would be a huge PITA for me - fuel filler is under there and have to fuel several times a day with no helpers. I can picture the GT f/g lid flying away in the Willow Springs gusts.
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jkb944t
post May 25 2015, 06:46 PM
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QUOTE(Harpo @ May 17 2015, 05:18 AM) *

I have seen a few hood hinges with holes drilled in them. I'm not sure if this is a cosmetic/decorative thing or for weight savings. For those of you that have performed this has it effected the structural integrity? I just think it looks cool. Here are some photos I found of someone else's hinges
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I did it for the cool look. As others have pointed out the weight savings would be negligible. It wasn't too hard to drill them and I am hoping that once I am done with my car it will add to the cool look of my 914 GT.

Jeff B
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Harpo
post May 26 2015, 05:55 PM
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I finally finished my front hinges. I have some deburring & sandblasting before paint
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brant
post May 27 2015, 07:15 AM
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QUOTE(Harpo @ May 26 2015, 05:55 PM) *

I finally finished my front hinges. I have some deburring & sandblasting before paint



just keep going



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