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Old 08-31-2014, 10:10 AM   #331 (permalink)
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Old 08-31-2014, 10:19 AM   #332 (permalink)
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I might, but In 95 degree heat and 60% RH its no fun.
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Old 08-31-2014, 05:07 PM   #333 (permalink)
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Still cheaper than going for a fancy battery ...
Wouldn't drill bolts lengthways as it's where the strength is ...
At least not on drivetrain and serious stuff ...
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Old 08-31-2014, 06:56 PM   #334 (permalink)
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I think the strength is in the threads. Not as much torque at the center of rotation.

But what are the odds he trolling?
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Old 08-31-2014, 09:40 PM   #335 (permalink)
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Quote:
Originally Posted by freebeard View Post
I know a guy who used to race motorcycles. He claims he drilled holes lengthways through the middle of bolts to save weight.

That sounds tedious.
I remember going through a bike supply magazine and a water bottle holder came with hollow screws.

Okay, Amazon says that my oil drain plug weighs 1.6 ounces. If I bore out five percent of one hundred other bolts of the same weight, I would save half a pound. Are there a thousand bolts that heavy in the average car? Five pounds!

Wikipedia says my car weighs 2,519 pounds. I know how to drop it to 2,514! Two-tenths of a percent, suckers! I am going to purchase a manual drill and have huge arms!
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Old 09-01-2014, 05:24 AM   #336 (permalink)
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Honestly, drilling bolts in situ is tough if not borderline impossible.
Sawing off extra length is easy.


My opinion on the core being stronger is because it seems bolts are tough to drill. I might be wrong.

But you're damn right, at the end of the day, it sounds quite useless (an empty washing screen tank is much easier ...)
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Old 09-01-2014, 06:08 AM   #337 (permalink)
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Quote:
Originally Posted by renault_megane_dci View Post
Then you can mod for engine warm-up time and reduce weight.
I started sawing off extra bolt length on my cars, it's free ! (But not measurable )
I have started doing this myself.

Quote:
Originally Posted by freebeard View Post
I know a guy who used to race motorcycles. He claims he drilled holes lengthways through the middle of bolts to save weight.

That sounds tedious.
And want to do this, but I'm more concerned about getting the centers drilled out evenly without weakening one side... Thinking about getting a micro-mill to get the precision part... Grizzly.com
or a mini-lathe: Taig Tools - Desktop Milling Machines and Lathes.
mini-lathe.com home page
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Old 09-01-2014, 06:35 AM   #338 (permalink)
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Question is how much can be safely drilled out without compromising strength and this stopped me from going further.

On the other hand, sawing off extra length is dead easy and totally safe.

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