So i just bought a 2006 6.0L F-250 with 162xxx miles on it. Little did i know that im running 30lbs of boost when im on the throttle. My intake manifold is rated for 20lbs of boost and i heard stock head studs usually blow the head after 400hp. My truck was dyno'd at 498hp. So basically how quickly do i need to get these head studs and intake manifold done? Any help would be great. Thanks!

 

I'd really like to hear more about your setup. What intake manifold is only rated for 20lbs of boost? What mods do you have done to dyno 498? Never seen any truck make that power on stock head bolts, ever. I would really like to see what you have done first.

 

By your own numbers you are exceeding the "standards" with no issues. Maybe the questions should be about the "standards" you were given.

The head bolts don't fail at a given HP level. It's not that easy to determine what caused or when it will happen.

Intake manifold rating at 20 psi.........ever look at the OEM gauge...it red lines at 35 PSI if I recall correctly.

 

It has an EGR delete, 4 inch turbo back to 5 inch tips, injectors, SCT tune, intake, and some other odds and ends. I just got the truck from a dealership and i know the guy who had it before me and he said it was dyno'd at 498hp on the wheels. do you think its even close to that power?

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your correct it does redline at 35-40 but on the OEM intake manifold it sais its only rated for 20psi which makes NO sense at all

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Hey guys, i apologize. The specs i was given were all wrong. Here are the correct specs and mods:
-S&B Intake
-MBRP exhaust
-Swamps 58v FICM tuned
-SCT tune
-EGR Delete
-New oil cooler
-Coolant filter

Dyno'd -398hp/832ft tq

With this being said, a couple of my buddies that work at our local jack safro dealer said that the truck went through the shop and the head studs are stretched but havnt broken yet. What would you guys recommend. PLEASE HELP!!!

 

Ok this all makes a lot more sense.

I would save for headstuds. Especially if you continue running the hot tunes. Some guys have good luck and don't need them. But for everyone 1 of those guys, there's probalby 1000 who do need them.

OEM intake manifold has been taken WELL above that. I wouldn't worry about that at all. Where did you get it was only rated for 20psi anyways? They run more boost than that stock.

 

I read right on top of the OEM manifold in my truck that states 20psi! i was thinking, how could this be? But anyways, head studs it is! you helped out a ton so thank you all very much!

 

No problem man. Just read around here a bit, we've had quite a few headstud threads recently with all the parts needed and suggested methods. Welcome to DB.

 

So I'm running a moderate street tune, the guy that owned the 6.0 before me said if i run a race tune ill blow stuff up. So if i keep it at a street tune would you still recommend me doing head studs?

 

No street tune is making 400/830 those are race tune numbers. A normal street tune would be near the 400hp mark, but tq would be below 700. Typically an extreme street/race tune would be in the 420-430 rwhp, and 800 rwtq area, which sounds like the numbers you have. Maybe the truck dyno'd that at one point and then a normal street tune was loaded back on after.

I would try running a street tune with stock headbolts, I'm doing that now, and no matter how hard I flog on it, it seems to be holding OK. That's your call though man, if you have the resources to fix it if it does break, then run whatever you want. If you expect it to NEVER have headgasket issues, put it back to stock!

Did you get the SCT with the truck?

I ran race tunes for a while before I popped my headgaskets and even after that I kept running it for almost a year before I had a major failure (headgasket had a chunk blow out of it). It wasn't the end of the world... it's not like anything really got damaged other than the gaskets themselves.

If I had to do it again (actually, wait... I am doing it again), I'd buy all the parts to do the job, set them on the shelf, then load up whatever tune and enjoy it til it starts pushing coolant, then tear it down and fix it right.

 

That is excellent news. When i get on it full throttle it spills a little coolant but it doesnt appear to be blowing out of the overflow rather than some kind of filter. (obviously not sure what filter) i dont know if it could be as easy as changing the seal or what, i can post a pic later today when i get out of school. back to the headstuds, i jsut dont want my head blowing through the hood. If i blow a headgasket then thats part of life when you own a diesel, i just dont want my head breaking the headstuds off and having a piece of metal rocketing into the air (ive seen a head blow at a truck pull, didnt look like a fun fix)

and just a shout out, Diesel bombers is definitely the most helpful resource ive come along. Thank you all for helping me out! Hopefully ill know as much as you all know one day. (I have some time im still 17)