AlaskanRider
New Member
- Joined
- Apr 5, 2011
- Messages
- 165
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 1991
- Make / Model
- Ford
- Engine Size
- 4.0
- Transmission
- Manual
Ive been crunching numbers trying to ballpark a turbo for my 4.0 OHV, 200-250 HP range. 5-6 psi of boost.
Seems like the only thread I can find with explicit information is copykat's, and he recommended a T3 .45 trim. I love how cheap they are.
Im afraid that they are a little too small though. My math puts me around 27 lb/min air at 1.6 pressure ratio at redline, and that is well off of any map for a t3 I can find.
Garett has a cool little turbo sizing app, and it thinks I only need 22 lb/min for 250 HP, which seems a little optimistic, but is still off the map for a t3.
Do you think copykat is able to control himself in order to not overspool the turbo? If you look at it that way, it will bump the torque to 270 ft lb at 2200 RPM. But I think i would be overspooling the turbo on a regular basis due to my lack of control.
Any input appreciated. I have zero experience with this stuff, and am enjoying learning about it.
Seems like the only thread I can find with explicit information is copykat's, and he recommended a T3 .45 trim. I love how cheap they are.
Im afraid that they are a little too small though. My math puts me around 27 lb/min air at 1.6 pressure ratio at redline, and that is well off of any map for a t3 I can find.
Garett has a cool little turbo sizing app, and it thinks I only need 22 lb/min for 250 HP, which seems a little optimistic, but is still off the map for a t3.
Do you think copykat is able to control himself in order to not overspool the turbo? If you look at it that way, it will bump the torque to 270 ft lb at 2200 RPM. But I think i would be overspooling the turbo on a regular basis due to my lack of control.
Any input appreciated. I have zero experience with this stuff, and am enjoying learning about it.