S366 questions
Cargo Master
Joined: Feb 2009
Posts: 2,111
Likes: 0
From: Yreka, CA
Couple guys here running them and they like them. It will depend on your injectors and power goal but with stage 1/2's the S366 seems to be the popular way to go.
Post Fiend
Joined: Dec 2009
Posts: 15,505
Likes: 18
From: Livoina,La
Trending Topics
Thread Starter
|
Senior User
Joined: Jul 2012
Posts: 108
Likes: 0
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
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
What good will that do on a diesel?
S366, as others have said is a bit too small for 238's. Keep in mind that the 66 part means 66mm compressor inducer, which is the same as the stock turbo. The big benefit of the S366 is it's a more durable turbo, and more efficient. Getting an S400 frame turbo in an OBS takes a bit of finessing the firewall, just so you know.
S366, as others have said is a bit too small for 238's. Keep in mind that the 66 part means 66mm compressor inducer, which is the same as the stock turbo. The big benefit of the S366 is it's a more durable turbo, and more efficient. Getting an S400 frame turbo in an OBS takes a bit of finessing the firewall, just so you know.
Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
What good will that do on a diesel?
S366, as others have said is a bit too small for 238's. Keep in mind that the 66 part means 66mm compressor inducer, which is the same as the stock turbo. The big benefit of the S366 is it's a more durable turbo, and more efficient. Getting an S400 frame turbo in an OBS takes a bit of finessing the firewall, just so you know.
S366, as others have said is a bit too small for 238's. Keep in mind that the 66 part means 66mm compressor inducer, which is the same as the stock turbo. The big benefit of the S366 is it's a more durable turbo, and more efficient. Getting an S400 frame turbo in an OBS takes a bit of finessing the firewall, just so you know.
The S366 cannot flow the exhaust required to live at that level. Backpressure will be high and eventually kill the journal bearings. You can run it if you want to, but an external wastegate is a must if you want it to survive.
IMO, I would step up to an S466 or S467 (some call it the S468, same turbo).. I would decide on the exhaust housing size depending on the transmission. If it's an auto, I would do a 1.10 T4 and if it's a manual I would go to the 1.0 housing and possibly drop down to the .90 if it needs to spool quicker and backpressure is in check.
Hotshot
Joined: Jul 2003
Posts: 12,177
Likes: 40
From: Newport, WA
you're right, I had D66 in my brain but said stock because... well because I'm dumb 
At least we agree that it's too dang small for the OP's intended plan!