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Tip For Those With RaceWare Head Studs
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Smoothie  



Joined: 01 Jan 2003
Posts: 8030
Location: DE (the one near MD, PA, NJ)

PostPosted: Thu Jun 12, 2008 5:32 am    Post subject: Reply with quote

I happen to have my old head bolts laying around. The thread is M12x1.75, length with the washer in place is 110mm, and length without washer is 114mm (washer is 4mm thick ). Overall length including the head (hex socket head) is 126mm (12mm head length).
Info stamped into the head is "M12 - INBUS 10.9".
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'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox
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bass gt  



Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!

PostPosted: Thu Jun 12, 2008 5:43 am    Post subject: Reply with quote

Smoothie wrote:
length with the washer in place is 110mm, and length without washer is 114mm (washer is 4mm thick )

thank god you helped me, i was running out of fingers and toes
I will call Arrow tomorrow and get the ARP part number.
Because i love you all so much
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bass gt  



Joined: 02 Dec 2004
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PostPosted: Thu Jun 12, 2008 5:44 am    Post subject: Reply with quote

Smoothie,

Forgot to ask. What is the length of the bottom thread? i will need this too

Steve
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Rasta Monsta  



Joined: 12 Jul 2006
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PostPosted: Thu Jun 12, 2008 5:54 am    Post subject: Reply with quote

Yeah, I don't have the worksheet yet, but I suspect they will want the depth of the threaded hole in the block.
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  • Red (1987 924S) - Pro44/Spec944
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Smoothie  



Joined: 01 Jan 2003
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Location: DE (the one near MD, PA, NJ)

PostPosted: Thu Jun 12, 2008 5:56 am    Post subject: Reply with quote

I noticed you asked for the "bottom diameter" before, now the "length of the bottom thread".. Assuming by length you mean the length of the whole threaded section, my trusty calipers say 33.4mm. -And for the diameter of the first thread I get 11mm (caliper over the rest of the threads shows 11.7mm).

Washer ID is 12.5mm, OD is 23mm, thickness as mentioned before is still 4mm.
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bass gt  



Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!

PostPosted: Thu Jun 12, 2008 6:02 am    Post subject: Reply with quote

Smoothie wrote:
I noticed you asked for the "bottom diameter" before, now the "length of the bottom thread".. Assuming by length you mean the length of the whole threaded section, my trusty calipers say 33.4mm. -And for the diameter of the first thread I get 11mm (caliper over the rest of the threads shows 11.7mm).

Washer ID is 12.5mm, OD is 23mm, thickness as mentioned before is still 4mm.


Smoothie, thanks. i was close at M12x1.5!! So, 34mm from bottom of bolt to top of bottom thread(if that makessense) leaves (wait, err 6, 5,8&3-2+44=) 80mm for shoulder to the bottom of the head.
Hopefully be back tomorrow with the info.
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-nick  



Joined: 16 Nov 2002
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Location: Cambridge, MA

PostPosted: Thu Jun 12, 2008 6:59 am    Post subject: Reply with quote

Ah, this is an oldy. I ended up going Smoothie-style and cut a notch out of the tops of the studs with a dremmel so that I can just use a flathead screwdriver to twist them in and out. Works like a charm.
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Rasta Monsta  



Joined: 12 Jul 2006
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PostPosted: Thu Jun 12, 2008 9:38 am    Post subject: Reply with quote

Here be the ARP worksheet:


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Rasta Monsta  



Joined: 12 Jul 2006
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PostPosted: Thu Jun 19, 2008 1:28 am    Post subject: Reply with quote

Awfully close here. . .anyone?
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bass gt  



Joined: 02 Dec 2004
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Location: Johannesburg for now!!

PostPosted: Thu Jun 19, 2008 1:51 am    Post subject: Reply with quote

Rasta,

Sorry, been up to my ears in it at work. I have spoken to the Guy's at Arrow, and should have the info/ part number by tomorrow.
One thing i need checking though please. Looking at the details supplied, 1.5 seems to be very fine for a bolt of this size. I would expect it to be 1.75 pitch. Can someone remeasure and confirm this lower pitch size for me. Looking at the Ford items, they all run 1.75 so it seems logical that it should be that.

Steve
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Smoothie  



Joined: 01 Jan 2003
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PostPosted: Thu Jun 19, 2008 6:42 am    Post subject: Reply with quote

Absitively someone else measure to confirm, but Steve, I think you're actually the only one that's suggested it might have been a 1.50 pitch, right?
Smoothie wrote:
The thread is M12x1.75,

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bass gt  



Joined: 02 Dec 2004
Posts: 971
Location: Johannesburg for now!!

PostPosted: Thu Jun 19, 2008 8:16 am    Post subject: Reply with quote

Smoothie wrote:
Absitively someone else measure to confirm, but Steve, I think you're actually the only one that's suggested it might have been a 1.50 pitch, right?
Smoothie wrote:
The thread is M12x1.75,


Oops mea culpa. it's me getting my wotsits in a tiswas!! Well that makes it easier. OK, so the pitch is definatley M12x1.75. That is a Ford fitment, so it should be a snap. Spoke to the guy today, but he has not had a chance to check. Promised me a reply tomorrow, however, i'm flying to Johannesburg, South Africa tomorrow evening, so i might miss his mail. Worst case, I'm back Tuesday evening, so hopefully will be able to post the ARP part number then. hold tight chaps

Steve
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Rasta Monsta  



Joined: 12 Jul 2006
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PostPosted: Thu Jun 19, 2008 8:18 am    Post subject: Reply with quote

Didn't mean to get you thinking it was some huge rush, Steve. I appreciate your help, and your own schedule is fine by me.


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RC  



Joined: 25 Mar 2007
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Location: Australia

PostPosted: Thu Jun 19, 2008 9:32 am    Post subject: Reply with quote

So is there a group buy happening here?
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macBdog  



Joined: 16 Aug 2004
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Location: Brisbane, Australia

PostPosted: Thu Jun 19, 2008 10:15 am    Post subject: Reply with quote

I'll get some, my engine is coming out soon.
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