Recently bought a 08 F-250 6.4. It was preowned and already has the DPF removed and deleted and is tuned with an H&S XRT Pro Tuner. I am running the Hot Damn Tunes but I usually "Grandpa Drive" to try to achieve the best fuel miliage. Almost all my driving is highway as I commute 110+ miles daily to and from work. Awesome Truck.
Question is: How much boost can these engines handle? When I do the tranny relearn it must be going over 40psi.....And occasionly when when passing on highway you can easily get pressure up when punching it.
What can it take as long as its not constant?

 

41 PSI is my understanding in stock form. Guage is capable of reading that much and seems to be acurate.

 

It could easily handle spikes of 48-50.

 

Yep.....the gauge does go to 41 and one can assume that should be safe.
Rephrase the question some.
How much boost are we capable of producing (tuned)?....anyone put an aftermarket boost gauge on yet to see?
Does anyone think the engine can handle what we are capable of producing?.....how long is a short burst.
Already knew what the gauge goes up to
Thanks...

 

Hmmm.....OK

 

I have seen 43-44 psi on mine.

 

I think I remember seeing 56 psi once. Hard accel running Spartan 275 hp tune. I don't usually monitor it really closely on my Dashdaq though.

 

Just want to know that the engine can take that higher boost occasionally.....say like a freeway race from time to time.

 

Ive been in the high 40's with mine a few times.

 

"Take" is a relative term...it will take boost well into the high 40s/low 50s PSI, right up until you lift the heads. If you want to run a hot tune safely, you need to stud the motor and should do a full EGR delete while you're at it. The transmission is also quite stout, but will only tolerate so much abuse at almost double the stock power levels...

 

I see 40-44 all the time on my dashdaq. I run the Spartan 210 tune. Knock on wood...no problems.

 

I sure wish Spartans 210 tune did not produce that high of boost, it would be a perfect tune.

 

Thankyou for your comments

 

When I first tuned my truck I saw it hit 62psi. That scared me (since I'm not studded) so I set the alarm on the DashDAQ to 42psi, stayed off the skinny pedal for a while and after I deleted the EGR I punch it every once in a while. The DashDAQ hasn't yelled at me yet, so I feel better about it.

 

Yeah thats a lot of boost, I developed issues and I don't think I ever saw that much boost.
I've been in a friends spartan 6.4, and 60 lbs of boost can happen fast and easy.
Also on higher spartan tunes, there is no safety built in, and no wastegate, so it will just boost as high as heck.