Competition Best place to purchase 12mm Head Studs?

[Cory]

Does anyone know where the best place to prchase 12mm head studs?

 

[DRadzierez]

I like haisley studs because they have the allen head in the top to tighten and remove them.

 

[wildmanben]

ARPs have that too. Just look around or ask a vendor for a quote. You can usually pick them up for about $400 for the ARPs.

 

[Timebomb]

NOTICE... ... ..... Be prepared to machine the rocker arm stand, The new revised studs are shorter to clear the valve covers but to compinsate you must remove . 200 thousands off of the rocker stand so the nut will be lower alowing more threads from the stud into the nut. They give you all the instructions on what to do in the stud kit. Also they butter you up by giving you the rocker stand bolts, the older kits did not have these. Hope this helps.

 

[BILLVO]

NOTICE... ... ..... Be prepared to machine the rocker arm stand, The new revised studs are shorter to clear the valve covers but to compinsate you must remove . 200 thousands off of the rocker stand so the nut will be lower alowing more threads from the stud into the nut. They give you all the instructions on what to do in the stud kit. Also they butter you up by giving you the rocker stand bolts, the older kits did not have these. Hope this helps.

Which company are you refering too? This is going to be my next purchase also.

 

[Signal73]

ARP P/N 247-4203



I had my friend do them on a Miller, wasnt bad at all and no valve cover interference.

 

[COMP461]

that is true on the 12 valve heads , the 24 valve and CR head do not require this . I can help anyone who needs help on ARP Tech Questions , I get at least 2 or 3 a weeks sent to me from ARP my email is -- email address removed --

 

[wildmanben]

I ground the web out of the valve cover and havent had any issues.

 

[Extreme1]

I went with the ATS studs. They use a different material that has much higher tensile strength that has no limit to the number of times they can be torqued. Not that much more $$ for being able to use them indefinately.

 

[IC Smoke]

Can a vendor PM me with ARP costs? Thanks!

Ian Coleman

 

[Forrest Nearing]

I went with the ATS studs. They use a different material that has much higher tensile strength that has no limit to the number of times they can be torqued. Not that much more $$ for being able to use them indefinately.

any fastener can be used indefinately if they don't reach their elasticity point

 

[COWBOYDUALLY]

Machining the Rocker stand? Well you could do that OR just take a sanding disk on a die grinder and shave it off just a hair... just finished mine last night... Aint no need to get all rowdy with a mahine shop, and it isnt going to hurt them doing it the farmboy way, just be sure to file down the burs when done... .

 

[wildmanben]

Now thats my style there!

 

[COMP461]

Everybody’s studs have a clearance issues, it’s because the washers and nuts are taller then the bolt head. This is the trade off when you want to install a fastener that will deliver a greater clamping load. I use a mill if I cut on the rocker stands. You can also grind on the valve cover. ARP has addressed this issue, making it easer to install on the 12 valve. There is no issue with studs being retorqued you can reuse them indefinitely .

 

[csevers]

The reason for using a MILL is to get the rocker cut Square with the head so the stud is not pulled at an angle I would find it hard to believe that one could get the surface of the rocker square/flat with a grinder.



Craig

 

[Extreme1]

any fastener can be used indefinately if they don't reach their elasticity point

Yup, I had a material science class too. But when the manufacturer states that they can only be torqued 3-4 times before being replaced and there is an aftermarket product that increases the diameter, I consider it worthwhile to put up roughly 25% more $$ for a product I won't have to replace. Ever.

 

[Forrest Nearing]

I'm confused... There are lots of guys out there who have torqued their ARP's more than 3-4 times.

 

[COMP461]

Yup, I had a material science class too. But when the manufacturer states that they can only be torqued 3-4 times before being replaced and there is an aftermarket product that increases the diameter, I consider it worthwhile to put up roughly 25% more $$ for a product I won't have to replace. Ever.

WHO ARE YOU QUOTING, ARP studs can be used multiple times, the stock studs are torque to yield bolts and have to be replaced if they stretch. There are only two manufactures of fasteners in the country, ARP and A1 . Everyone else reboxes them.



The ARP 2000 are IMO the best when you conceder all aspects of fastener technology. ARP also makes a NA625 12mm stud that is equivalent to a CM 14mm stud and will deliver incredible clamping loads, along with a big price tag. This is the same material used in formula 1 and Top Fuel studs. ARP is the chose of 100% or NASCAR teams and 100% of NHRA TF, FC, PRO , COMP, TAD, TAFC

 

[Forrest Nearing]

I looked all over ARP's website... they did say that a fastener will lose its strength after repeated torque cycles, but I didn't see anywhere where it said you could only torque to 220,000psi 3-4 times



I also didn't see on ATS' website where it said you could torque an indefinate number of times.



Greg, any ballpark on how many cycles the ARP2000 stud can be torqued to 75% stretch? I think mine are on number 5... two when they were originally installed, and currently on my 2nd re-torque after the Raymac head was installed. I was planning on re-torquing again when the injectors go in.



thanks

 

[COMP461]

I'll Check