Morgan@Midwest Diesel & Auto
New member
I'm doing this because I've been getting a lot of people asking or telling me things that they've "heard" about the 2015 turbos. Especially being unusable in stock form because of the supposedly "too small turbine".
There seems to be a perpetuated myth that the factory turbine is so restrictive that with just a tune your going to damage your engine. I want to dispel this myth as I am tired of having to explain this to people.
64mm stock turbine on a 2012, no gate, nothing more than a retrofit kit, delete pipe and mcc tuning. 559 hp at 1330us 30psi of boost and 43 psi of exhaust back pressure.
My 2015, 64mm stock turbine, 1550us-1700us (only gained 3hp from 1550 to 1700) all over 600hp. Wastegate COMPLETELY shut making 40 psi at 60 ebp.
Stock turbine with smaller compressor has even less ebp due to the smaller compressor creating less resistance on the turbine, therefore causing less ebp.
If you are experiencing high ebp, try different tuning. The turbo itself is 100% capable of being in a "safe" zone on any stock fuel 6.7 from 11-15 with good tuning.
This is grossing 19k on flat ground cruising in 5th at 60mph. I routinely see 1.1:1-1.2:1 ebp to boost ratio cruising.
Worst I have seen maxed out WOT running to 100mph at 4000 rpm is 1.5:1-1.6:1 ratio.
I have never seen 2:1 or 3:1 figures all these people keep throwing out there. These are real numbers not "I heard from so and so" crap. We are using actual 100psi stand alone sensors and monitor ruling out any of the incorrect signals you get reading through pcm.
Lets keep this is open for discussion as I am sure there are lots of people who are curios. Maybe some with actual hard data can throw it in here for reference.
Sent from my iPhone using Tapatalk
There seems to be a perpetuated myth that the factory turbine is so restrictive that with just a tune your going to damage your engine. I want to dispel this myth as I am tired of having to explain this to people.
64mm stock turbine on a 2012, no gate, nothing more than a retrofit kit, delete pipe and mcc tuning. 559 hp at 1330us 30psi of boost and 43 psi of exhaust back pressure.
My 2015, 64mm stock turbine, 1550us-1700us (only gained 3hp from 1550 to 1700) all over 600hp. Wastegate COMPLETELY shut making 40 psi at 60 ebp.
Stock turbine with smaller compressor has even less ebp due to the smaller compressor creating less resistance on the turbine, therefore causing less ebp.
If you are experiencing high ebp, try different tuning. The turbo itself is 100% capable of being in a "safe" zone on any stock fuel 6.7 from 11-15 with good tuning.
This is grossing 19k on flat ground cruising in 5th at 60mph. I routinely see 1.1:1-1.2:1 ebp to boost ratio cruising.
Worst I have seen maxed out WOT running to 100mph at 4000 rpm is 1.5:1-1.6:1 ratio.
I have never seen 2:1 or 3:1 figures all these people keep throwing out there. These are real numbers not "I heard from so and so" crap. We are using actual 100psi stand alone sensors and monitor ruling out any of the incorrect signals you get reading through pcm.
Lets keep this is open for discussion as I am sure there are lots of people who are curios. Maybe some with actual hard data can throw it in here for reference.
Sent from my iPhone using Tapatalk
