If you have o-ringed heads, come in here... Which studs are you running?

MrOneEyedBoh · May 15, 2014

Im debating on which stud to go with. Id be going to MPD, so they are going to o-ring in house but send the heads out to get decked etc. Im looking for around 600-650max HP. Id be running their 190/75s and an 03 turbo for now until I can get my 68mm or non-vgt ( I think thats what Im going to do... ) April 2015.

If you are running o-ring heads, which studs are you running and how much power?

With that being said, which stud should I go with? I was thinking either ARP 425s or the CA625s. I know we've been seeing a lot of threads all over about ARPs failing etc. but I think diesels got big FAST and that meant a lot of shade tree mechanics were installing them. Doing shady install jobs etc lead to failures. Now I do think that stud is put to do extra work based on the amount of headstuds used ( 2 instead of 4 ).

So my line of thinking on the CA625s is, spend another 1000 now to save another 5k later. I was thinking about Extreme studs, but that hydrogen embrittlement ( which happens to all tool steel at some point ) has me paranoid. So its 425s or 625s in the running now.

strokin6L · May 15, 2014

Fire ringed heads with standard ARP's for 8 years now.

HobbyStock62 · May 15, 2014

I personally think that the 425s will do just fine. Like you said, I think a lt of the failures could be do to bad work quality.

Josh@DirtyDiesels · May 15, 2014

O ringed heads with standard arp's re used 3-4 times. No issues. 700hp and lots of abuse. The boys at mpd will get you set up right.

borsky · May 15, 2014

im running reused standard arp's in mine, but I only have about 3k miles on it so far

ford rules · May 16, 2014

Why not just do whatever mpd recommends

stroke6.0 · May 16, 2014

Beings I used to work at mpd, I can tell you that o ring them in house, then install with standard 425s. But the other day i do remember them talking about using extreme studs as an option too for customers

MrOneEyedBoh · May 17, 2014

Thanks guys. Just me thinking out loud here.. Thats all.

I have been talking to Buddy for a while now, asking him all kinds of things etc. Just looking to get it all lined up. Ive been sittin' on the cash for a longgg time now. Im ready to get it done up.

I was thinking about using the Extreme studs but I have my reasons against them now. More so paranoia but I dont want to do this twice. Also someone had a stud break ( Im thinking it was the Extremes, but I cant say for sure. ) So Im worried about the hydrogen embrittlement which DOES happen. I dont want to get into it, but I can if someone wants me to haha. ( hopefully not :morons: )

Craig@MFI · May 17, 2014

We use arps and oring heads and give the customer a 1 year warranty so no need to worry about doing it twice if you bring it to us

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