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Old 02-11-2014, 10:58 AM   #26
m.bryant
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Quote:
Originally Posted by jnorth85 View Post
That Engine plate is pretty genius Great work on the studs guys! Cant wait to get my motor running, we just need some of this snow to melt!
I've been beating the hell out of my Outfront motor for 2,100 miles already...what's taking you so long???
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Old 02-11-2014, 11:29 AM   #27
jnorth85
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Quote:
Originally Posted by m.bryant View Post
I've been beating the hell out of my Outfront motor for 2,100 miles already...what's taking you so long???
snow
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Old 02-11-2014, 11:43 AM   #28
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Quote:
Originally Posted by jnorth85 View Post
snow
you have a Subaru...



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Old 02-11-2014, 11:47 AM   #29
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Originally Posted by Flat 4 Motorsport View Post
you have a Subaru...



I have a honda civic that looks like a subaru. or something.
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Old 02-11-2014, 12:02 PM   #30
m.bryant
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Quote:
Originally Posted by jnorth85 View Post
snow
I live 12 miles from you...lamest excuse ever.
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Old 02-12-2014, 08:48 AM   #31
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Like using this stuff? A head of you on that one
bastard! I have a **** ton of this stuff on the way to test some theory's!
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Old 05-22-2014, 02:21 PM   #32
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Great customer service!

I talked to Jeremy, ordered them same day and package was sent right away. Thank you guys.
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Old 08-27-2014, 08:44 PM   #33
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As far as the shortblock, if I order the Outfront Closed Deck case halves with the 1/2" Outfront studs, will it be all preassembled so I need to do is to drop in my choice of pistons/rods/crank?
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Old 08-27-2014, 11:37 PM   #34
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What could possibly be pre-assembled in that situation?
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Old 08-28-2014, 07:43 AM   #35
25rsti
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I'm pretty sure he was being sarcastic.
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Old 07-28-2015, 09:10 PM   #36
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What should the 1/2" studs be torqued at and in what pattern?
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Old 08-03-2015, 03:39 PM   #37
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Quote:
Originally Posted by jockeygolfs View Post
What should the 1/2" studs be torqued at and in what pattern?
Iirc it's 140 ft/lbs torqued in oem sequence.
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Old 12-26-2015, 01:58 PM   #38
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Why can't I view this post?
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Old 12-26-2015, 02:33 PM   #39
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Originally Posted by KinkSti View Post
Why can't I view this post?
Just read this thread and I was wondering about this too.
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Old 12-26-2015, 02:35 PM   #40
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What's the most one can torque the 625+ca above ARP recommendations?
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Old 12-26-2015, 06:06 PM   #41
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^ Why would you torque beyond recommended bolt torque/stretch? That's just asking for trouble IMO, with more downsides than up.
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Old 12-28-2015, 10:45 AM   #42
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Quote:
Originally Posted by KinkSti View Post
What's the most one can torque the 625+ca above ARP recommendations?

Why not just follow the factory procedure in the FSM
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Old 12-28-2015, 01:18 PM   #43
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Originally Posted by spoolinsti05 View Post
Why not just follow the factory procedure in the FSM
Lol wut?
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Old 12-28-2015, 03:00 PM   #44
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That's comparing apples and watermelons
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Old 12-28-2015, 04:44 PM   #45
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Or Jessica Alba (human) to Sarah Jessica Parker (horse)
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Old 12-28-2015, 07:49 PM   #46
Paul
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Come on guys he "knows what he's talking about". Might as well tq 1/2in studs to factory specs as well. Lol
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Old 12-28-2015, 07:57 PM   #47
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Lol I was being sarcastic
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Old 12-28-2015, 08:20 PM   #48
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Old 12-29-2015, 07:27 AM   #49
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Default Outfront Motorsports 1/2" Stud Torture Test, compared to ARP 2000 and 625+

Why would you torque over factory spec. I run my arp2000 to 95ft lbs my 625 when I get them will most likely get 105ft-lbs I have the same snapon digital torque wrench. And I use impact sockets from the jump less flex less broken sockets precision torque...
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Old 06-17-2016, 01:00 PM   #50
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Not usually explained, "Bolt Torque" is how the proper (read-max) torque of a fastener is determined. The actual equation is:




Torque = K * SB * d * Ab

Where:

K = 0.2 (friction coefficient) well lubricated bolt and nut

T = bolt torque (ft-lbs)

SB = desired bolt stress (psi) determined by material strength ie ARP2000, 625+

d = root diameter of the bolt (in). smallest diameter of the fastener (the shank)

Ab = cross-section root area of the bolt (in2)


Removing the fixed values above there are only two ways to increase the max torque of your head studs:

Material and diameter. If the fasteners are the same size such as in the 260-4701 (ARP2000) and the 260-4704 (custom age 625+), then the increase in torque is simply the difference in material strengths , custom age 625+ material is approximately 10-15% stronger than ARP2000, therefore the max torque would increase linearly by the same. Note that the recommended torque of the 11mm ARP2000 is 90ft-lbs whereas the recommended torque of the 11mm 625 custom age piece is 100ft-lbs, some torque this later stud up to 110ft-lbs.


The Outfront Motorsports 1/2" head stud kit gathers its superior strength by increasing the cross section of the fastener. This is an exponential increase. The increase of shank diameter from .361" to .438" nets a whopping 50% more cross section over an 11mm head stud. If we apply the same bolt torque as the ARP2000 11mm stud of the same material, then the max torque value also would increase by 50% netting 145ft-lbs max torque! Outfront Motorsports recommends these studs at 500< HP, Mandatory at 700< HP goals


How about the 14mm and 9/16 studs that other companies offer? Our first question is, why? What are you going to torque your head studs to? At some point head deformation will occur. If the torque required/recommended by your build is over 150ft-lbs, then you must, as that exceeds our 1/2 fastener. The draw backs are many. First you lose the head alignment dowels. The head gaskets need to be custom or you must modify the center two head stud holes. More extensive machining and material removal to block and head are also required. Less material now available under the head washer.



There are many copycats that seemingly think that a 1/2 stud is a 1/2 stud, even if made by ARP--they are not. We have custom features that cost more to manufacture and set our studs and hardware apart from the rest. We also now have all of our Studs manufactured with both "ARP" and "Outfront" on the stud so you know it's not a "want to be". We have been making 1/2 studs for Subaru since 2001. As our Subaru HP demands increase, you can be assured that Outfront Motorsports will always be working to provide the strongest solution possible.


Our ARP/Outfront head stud kit fits both EJ and FA platforms


Outfront Motorsports

Last edited by outfrontmotorsports; 06-17-2016 at 05:38 PM.
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