There is a 14mm head stud conversion option available from SoCal. I have not seen or heard much feedback from anyone running that setup. I am curious to know how well the stock head castings hold up on that much fastener torque.
lifting heads?
- Thread starter SAC owner
- Start date
I am not interested in machining the head bolt holes, I think the 625 studs are the ticket.
What is the ARP2000 limit? ARP told me around
60 lbs
60 lb? As in 60 PSIg boost? Heck, many people run 60 PSIg on stock head bolts.
I am no fan of the ARP2000 for our trucks (another story for another day), but they aren't that bad. If the head was lifting, there was another reason for it. Having the heads checked is the right answer, and if they are OK, I'd check the block. And make sure a good gasket is used (I like the Victor Reinz over the new GM ones) and the torque sequence is done properly.
I am no fan of the ARP2000 for our trucks (another story for another day), but they aren't that bad. If the head was lifting, there was another reason for it. Having the heads checked is the right answer, and if they are OK, I'd check the block. And make sure a good gasket is used (I like the Victor Reinz over the new GM ones) and the torque sequence is done properly.
That's what ARP told me I run well over 60psi in my high tune, However I was a bonehead and had a little race with another truck and it was -12* out. And it boosted well over 100psi I think.
I built the engine less than 1k miles ago used all MAHLE grade c gaskets and kit. block is solid and straight decked both mating surfaces as well.
super cold weather and too mas boost is the cause about 100% at this point..
Should I upgrade to the 625's?
I am a Master ASE and master diesel tech and own my own shop but the performance diesel is a newer thing to me
It was up there I know that, but still not sure why it lifted.... when I pulled the heads I saw a very slight soot line over to the coolant passage, just racking my brain of why, its all new deck head surface etc. other than studs.
My third tune makes 50psi and in the cold was smacking sixty fast and hard I know it was going over 60 but have no hard proof of what is was, so I am just assuming in the high tune it was pretty high.
I am doubting my studs at this point this will be the third time using them.
My third tune makes 50psi and in the cold was smacking sixty fast and hard I know it was going over 60 but have no hard proof of what is was, so I am just assuming in the high tune it was pretty high.
I am doubting my studs at this point this will be the third time using them.
I don’t know much about anything but I do know that like fingers said bad tuning can create horrible problems especially at high rpm high boost conditions. You need to make sure your tunes are on point because if for some reason just one small portion of the tune isn’t tweaked enough and you’re getting crazy cylinder pressures or a number of other things I could see lifting a head being an issue.
Soo, super cold air equals more boost huh? I've never heard this before, is it just bc it's more dense? I will admit my rcsb has been up on power lately...
Don't judge me guys, I live at the beach. Anything in the 30's is cold to me...
Turbos work on pressure ratios. Cold air is more dense, so you actually do get more boost. Not as significant as when you come down off the mountain to sea level, but it is noticeable.Soo, super cold air equals more boost huh? I've never heard this before, is it just bc it's more dense? I will admit my rcsb has been up on power lately...
Don't judge me guys, I live at the beach. Anything in the 30's is cold to me...
Soo, super cold air equals more boost huh? I've never heard this before, is it just bc it's more dense? I will admit my rcsb has been up on power lately...
Don't judge me guys, I live at the beach. Anything in the 30's is cold to me...
Yep from 60* to -12 i see a 10-15 lb change.