Subarutex Posted November 16, 2004 Share Posted November 16, 2004 Has anybody on here gotten, or looked into getting ARP head studs?? I'm wondering what sizes I would need to get... what thread pitch, lengths, etc... Quote Link to comment Share on other sites More sharing options...
calebz Posted November 16, 2004 Share Posted November 16, 2004 Not sure on the length, but the threads are M11x1.25 Quote Link to comment Share on other sites More sharing options...
Subarutex Posted November 17, 2004 Author Share Posted November 17, 2004 Per head there are: 4 bolts x 118.5mm long 9 bolts x 132.5mm long All thread pitch M11x1.25 Quote Link to comment Share on other sites More sharing options...
Turbone Posted November 17, 2004 Share Posted November 17, 2004 Where are you getting them from Tex? Quote Link to comment Share on other sites More sharing options...
Snowman Posted November 17, 2004 Share Posted November 17, 2004 Ask Rallyruss Quote Link to comment Share on other sites More sharing options...
Subarutex Posted November 18, 2004 Author Share Posted November 18, 2004 Got through to a person at ARP this morning. I need this info: The thickness of the head where the bolt holes are. Both the short and the long holes. I need to know how deep the threads go into the block, and also how much dead space there is in the hole before the threads start. I already know the size and thread pitch. Once I am able to give him these dimensions, he'll be able to give me a price. Any help would be appreciated. Not sure if the FSM's would have this kind of info. Quote Link to comment Share on other sites More sharing options...
mcbrat Posted November 18, 2004 Share Posted November 18, 2004 the ea81 studs are 11 x 126.5 x 39 they might work for the shorter ones Quote Link to comment Share on other sites More sharing options...
Subarutex Posted November 30, 2004 Author Share Posted November 30, 2004 Measurements I took from my block with my Vernier Calipers.There are 2 sizes of studs needed. 9 per head for a total of 18 studs. I need 6 smalls, and 12 bigs. SMALL: A. 14mm B. 25mm C. 76.5mm D. 12.7mm E. .043" (although, I would potentially like the oppurtunity to run a thicker copper gasket in the future) F. 8mm G. 24mm H. 44.5mm I. M11x1.25 BIG: A. NA - no counter bore B. 25mm (not really a bore, but the space allowed for clamping/washer space) C. 90.5mm D. 12.7mm E. .043" (see note for small) F. 8mm G. 24mm H. 44.5mm I. M11x1.25 These were taken off a neat sheet the ARP guy sent to me. I'll see if I can fill out a little legend for these. A. Depth of Head Counter Bore B. Diameter of Head Counter Bore C. Thickness of Head from the bottom of the counter bore to the bottom of the head D. Diameter of bolt/stud hole in head E. Head Gasket Thickness F. Depth of counter bore in block (space before threads start) G. Length of thread in block H. Depth of bolt/stud hole from block surface to bottom of hole I. Thread size and pitch Quote Link to comment Share on other sites More sharing options...
Subarutex Posted November 30, 2004 Author Share Posted November 30, 2004 I got a response back from the ARP guy. He has off the shelf studs that will work for the 6 small ones. He's getting me a quote to have the big ones custom made. Quote Link to comment Share on other sites More sharing options...
rallyruss Posted November 30, 2004 Share Posted November 30, 2004 thats about what I found out. sorry for not chiming in sooner.let me know if they will make the long ones for you. I would be interested in some. they are not cheap but the quality great. Quote Link to comment Share on other sites More sharing options...
garner Posted November 30, 2004 Share Posted November 30, 2004 yes, let us know what they say in terms of price for the longer studs. If it helps, maybe we can get a few people together on this and do a group buy thing..... garner Quote Link to comment Share on other sites More sharing options...
WJM Posted December 1, 2004 Share Posted December 1, 2004 Per head there are: 4 bolts x 118.5mm long 9 bolts x 132.5mm long All thread pitch M11x1.25 Wait, shouldnt that be 3 short and 6 long per head? Quote Link to comment Share on other sites More sharing options...
WJM Posted December 1, 2004 Share Posted December 1, 2004 Ok, i see that was addressed up there... :-p I am certinly interested as well. I want some freaking 100 ft-lbs holding the head on...or MORE. Quote Link to comment Share on other sites More sharing options...
WJM Posted December 1, 2004 Share Posted December 1, 2004 Oh, and are we going to beable to re-use the studs? Say...if I TOAST a block that I have them in, am I going to beable to get the studs out easily and install them into another block? Quote Link to comment Share on other sites More sharing options...
rallyruss Posted December 1, 2004 Share Posted December 1, 2004 they are not stretch studs so there should be no reason that you cannot reuse them. they are probably better for reuse than a standard head bolt. Quote Link to comment Share on other sites More sharing options...
WJM Posted December 1, 2004 Share Posted December 1, 2004 GOOD. I am idlely looking to do TD04 soon. Quote Link to comment Share on other sites More sharing options...
Vanislru Posted December 1, 2004 Share Posted December 1, 2004 If there's a group buy I'd like in, for two sets. Quote Link to comment Share on other sites More sharing options...
NorthWet Posted December 1, 2004 Share Posted December 1, 2004 Anybody know an approximate price, like how much for the available short studs? Quote Link to comment Share on other sites More sharing options...
Subarutex Posted December 1, 2004 Author Share Posted December 1, 2004 The guy i'm working with at ARP is working up a quote. It should include the cost of the off the shelf small studs, the custom made long studs, and the needed nuts, washers, etc. I'll post it here when I get it... and I'll ask about doing a group buy then, if there is serious interest. Quote Link to comment Share on other sites More sharing options...
rallyruss Posted December 1, 2004 Share Posted December 1, 2004 I would say be ready to pay over 200$ for a complete set. but making the custom order may raise that a bit. this is just from what I learned from dealing with ARP. Quote Link to comment Share on other sites More sharing options...
NorthWet Posted December 2, 2004 Share Posted December 2, 2004 Is there a way to find out what they "stock"? Or do you need to contact the company and ask specifically? As mentioned in an earlier thread, I would be interested in stepping up to either 12mm or 13mm/0.5inch studs. A little better holding power, and perhaps more common size. $200 is a chunk of change, but like they say, "How fast do you want to go?" Quote Link to comment Share on other sites More sharing options...
Subarutex Posted December 2, 2004 Author Share Posted December 2, 2004 What I had to do is call them and ask if they had any for my application. Of course, they didn't, so they faxed me this dimension sheet and told me to email or fax it back. Did that, and the guy told me they have ones that will work for the small bolts, but not the large. Since my email server is down, I won't know till Friday if then what the quote on getting the long ones custom done. I was going to inquire about going to a bigger stud aswell, however i doubt the cost would negate the cost/effort of drilling retapping the block. Quote Link to comment Share on other sites More sharing options...
JWX Posted December 2, 2004 Share Posted December 2, 2004 why not find out whats the next biggest size stud, and get those, then when one gets their block trued get them to drill/tap for that size? might be a little cheaper Quote Link to comment Share on other sites More sharing options...
rallyruss Posted December 2, 2004 Share Posted December 2, 2004 the holes in the head may need to be drilled larger to clear larger studs. its a little bit close. rather than go larger you can install thread inserts/helicoils that are 7/16" and those studs may be mor easily found. that is of course if we strike out on the custom order for the larger ones. they never offered me that option when I talked to them last time. If they can do it for tex that would open up a great option for EA82T building. studs would really help a high boost aplication. I think what he is working on is really the best thing. Quote Link to comment Share on other sites More sharing options...
Subarutex Posted December 4, 2004 Author Share Posted December 4, 2004 Ok, I got my quote back: The 6 small off the shelf ones are $10.60 a piece. Total for these is $63.60. The other 12 studs would cost $593.25. Most of this I'm told is the setup cost. He will be getting back to me with a quote for 3-5-10 sets. Oh, on top of that, add the cost of nuts and washers, which I haven't gotten yet. $593.25 + 63.60 = $656.85 total for one set of studs. Nuts and washers extra $. A little bit out of my price range. I'd realistically be willing to pay $200 or so for a set. We'll see what the results are from the multiple quantity quotes. As I can't wait to get my engine together, I went ahead and order brand new head bolts. $2 a piece from 1stsubaruparts.com. Should be here late next week, or early the week after. This doesn't mean I am giving up! I will still take this contact as far as I can. Atleast get the info out there for others. Quote Link to comment Share on other sites More sharing options...
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