TwinTurbo.NET: Nissan 300ZX forum - it will break where the threads start to form on the shank
Subject
it will break where the threads start to form on the shank
Posted by
LitlElvis
on April 05, 2010 at 10:05 PM
This message has been viewed
188
times.
In Reply To
To clarify, if the threaded portion was longer, and the
posted by zellamay
on April 05, 2010 at 09:59 PM
Message
but that's nothing to worry about unless you over-torque the bolts.
Follow Ups
Stock head bolt tensile tests >>>
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LitlElvis
17:19:23 04/05/10
have you tested the replace ARP studs for reference?
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Carlos Ramirez
17:37:15 04/05/10
ARP lists their standard 8740 studs to be 200ksi
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LitlElvis
17:47:04 04/05/10
Interesting...
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Gold300zx
17:38:36 04/05/10
I'm curious, was the breakpoint at the nut, or does it have
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zellamay
17:53:55 04/05/10
it's more to do with the start of the threads
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LitlElvis
21:37:58 04/05/10
To clarify, if the threaded portion was longer, and the
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zellamay
21:59:16 04/05/10
it will break where the threads start to form on the shank -
LitlElvis
22:05:54 04/05/10
Thanks, you have been very informative. (n/m)
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zellamay
23:14:59 04/05/10
So the bolts dont really stretch? Just break.... (n/m)
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ZXoltan
18:37:31 04/05/10
Yes they stretch
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Brad(RI)
18:53:41 04/05/10
The threads are rolled. Like you, I hoped this would
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LitlElvis
07:54:18 04/06/10
Out of curiosity...
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Obeeone
19:13:36 04/05/10
Re: Out of curiosity...
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Brett@AwesomeZ
19:31:20 04/05/10
Re: Re: Out of curiosity...
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Brett@AwesomeZ
19:32:30 04/05/10
The graphs and some math tell the tale that you want to see
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LitlElvis
22:03:39 04/05/10
This is not about outright failure of head bolts
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LitlElvis
21:50:30 04/05/10
Never seen one issue with the factory head bolts yet (n/m)
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Seb@Specialty-Z
22:36:43 04/05/10
Seb, what's the highest HP you have run with stock bolts? (n/m)
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ZXoltan
07:45:11 04/06/10
a little over 1000 BHP (n/m)
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Seb@Specialty-Z
10:12:31 04/06/10
Do you guys recommend the stock head gaskets or MLS styles?
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KongZTT GT28RS MD
01:48:13 04/07/10
Exactly, it's not about breaking bolts
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Brett@AwesomeZ
00:44:29 04/06/10
typically, fasteners are preloaded to 75% of yield strength
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LitlElvis
07:16:53 04/06/10
I thought stock head bolts fell into this stretch category. (n/m)
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Antihero
08:36:50 04/06/10
All fasteners stretch when preloaded, the key is to not
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LitlElvis
11:56:01 04/06/10
the new ARP L19 hardware...
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KongZTT GT28RS MD
01:54:07 04/07/10
You have an instron in your shop? Impressive! (n/m)
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Scotts94z32
11:44:26 04/06/10
It's not mine, I just get access to it :-) (n/m)
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LitlElvis
12:07:25 04/06/10
What adjustment factor do you apply to the steel>>
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ZUL8TR
14:37:31 04/06/10
This is perfect.. I have been thinking of pulling
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KongZTT GT28RS MD
01:41:27 04/07/10
err.. L19 (n/m)
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KongZTT GT28RS MD
01:46:06 04/07/10
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