Join Date: Dec 2008
Location: Spokane WA. area
Thanked 990 Times in 755 Posts
Your welcome Levi, glad I can help and hopefully I can answer your questions.
Q. What kind of power am I making?
A. Not sure, haven't had the truck on a dyno, but if I were to guess with the current tuning, I would say easily 80rwhp over stock with the Powermax. The Powermax when tuned right has really good midrange and endless top end power, pulls really consistant all the way through the gears and dosen't flatten out on top, keeps pulling hard from each upshifted gear.
Q. How does the Powermax spool with tunes?
A. Tuned it spools like a stock turbo from a dead start, maybe slightly slower for a split second with my tuning, but is very quick spooling once in the power, and cruising speeds it spools quick and effortlessly, rpms build very quickly. With a semi-hot tune such as IDP's aggressive street tune which my buddies 06' has running with a Powermax, probably is putting out close to 130rwhp over stock, maybe even more, it gets up and moves as quick as a stock turbo with tunes from a dead stop, but pulls much harder throughout the gears and on top. The Powermax is a driving-cruising speed turbo for the most part, it is slightly larger than stock, takes a little more to boost it up, but has a midrange wallop and top end that keeps pulling hard and strong. Its great for driving at highway speeds and pulling long grades, but can also tow as well as a stocker with the right tuning. We pull horses and hay in mountainess terrain with no issues at all.
Q. Do you think I will be ok at elevation, I'm at 7000ft or higher 99% of the time?
A. The tallest grade we pull around here is just over 6000ft, and we live at around 2400ft, and our truck rarely sees under 2000ft. Were on the eastern WA and north Idaho border close to Montana. Truck pulls mountain grades at 70mph much easier with the Powermax than it did with the stock turbo. The Powerrmax is the turbo Garrett designed and thought should belong in the 6.0L. Don't get me wrong, the stock turbos can work well also and are not as finicky to tune, but for myself I would not go back to a stock turbo if given a choice. If most of your driving is slow winding mountain roads at high elevation, then a stock turbo may be a better choice, as its a bit smaller, takes less effort to boost it at low rpms and may be a better option for driving at high elevation. We sometimes tow 4 horses at high elevation on tight winding roads, and with the current tuning it works perfect, maintains steady boost levels and low egt's. So to answer your question...heres my take...if your stock turbo is still ok, then I would try it first with custom tuning, then decide if you need a change, as changing the turbo is not a difficult process and can be done easily with basic hand tools and a couple of 2-3hrs.
Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)