Official Bubba Report
Posting Guru
Joined: Feb 2007
Posts: 1,146
Likes: 3
From: Bradenton FL
Kris, just a thought. What wastegate does the bigger housing run? Could it be opening to early? Or not working right with the bigger turbo? More Fuel needs more Air right maybe even though the turbo is bigger its wategate isnt allowing as much air?
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
Mike, I know he's still got the stock IC. I got a look at it last week to be sure. But, it's the one with plastic end tanks and I'm wondering if there's not a leak at the seam there. My buddy blew the end tank on his stock IC of similar design...granted it's a Dodge...but still possible.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
I was just wondering, would he still have lower or more effiecient boost #s moving more air with his turbo setup. I would think that has something to do with it. His turbo wouldn't heat the charged air as much as my stocker.
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
He will still have lower boost numbers than a similar equipped truck with a stock turbo, if that's what you're asking. More air moved at lower boost with his turbo setup, when compared to a stock turbo.
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
That is exactly where I was going. The lower # does not necessarily equate to a boost leak or problem, just air being moved more efficiently. Just like your air intake temp tests revealed.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
I think though, what Kris was saying by a lower boost # was compared to what he's run previously with the same turbo setup rather than compared to a stock turbo. I think he should see a peak of 25-27 psi when he's accelerating from at dead stop, at WOT, when the truck shifts into OD.