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Posted by: Harpo May 17 2015, 07:18 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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Posted by: GeorgeRud May 17 2015, 08:31 AM

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!

Posted by: brant May 17 2015, 09:35 AM

I chose to eliminate my hinges altogether for weight reasons.

1835 lbs and a metal car

Posted by: r_towle May 17 2015, 09:35 AM

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.

Posted by: Mueller May 17 2015, 09:53 AM

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.

Posted by: Jeff Hail May 23 2015, 11:40 PM

Looks like a step drill with all the burrs. The steps will chamfer the edges a bit like that.

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Posted by: screenguy914 May 23 2015, 11:50 PM

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

Posted by: Krieger May 24 2015, 12:57 AM

I did my fronts a few years back. I have had no issues. I have no hood springs though.

Posted by: campbellcj May 24 2015, 11:09 AM

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...

Posted by: gms May 25 2015, 09:39 AM

QUOTE(brant @ May 17 2015, 10:35 AM)

I chose to eliminate my hinges altogether for weight reasons.

1835 lbs and a metal car

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

Posted by: campbellcj May 25 2015, 09:59 AM

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.

Posted by: jkb944t May 25 2015, 06:46 PM

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
Attached Image

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

Posted by: Harpo May 26 2015, 05:55 PM

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

Posted by: brant May 27 2015, 07:15 AM

QUOTE(Harpo @ May 26 2015, 05:55 PM)