2005 5.7 GXI-F spun bearings X3

[alldodge]

9.4 to 10.1 , yes that would cause det without reflashing the ECM.

When you first posted, I'm thinking standard rebuild, but if your opening it up, adding a cam, and then not using a wide band AFR meter, your asking for trouble. If you are running it at 4200 for long periods that can wipe out the bearings for a new motor. You don't have a flat tappet cam that I'm aware of.

Its getting more interesting finding out more info as we go along

 

[Lubak572]

Talk to mefi Bob about your engine specs, have him remap your ecu for it.

 

[Monterey 263]

Not remapping the ECU would/could explain the first to engines since they had the higher compression pistons. Engine 3 was box stock internals with the 9.4: CR. Engines one and two had the stock cam with roller lifters, and engine three had stock cam with flat lifters.

 

[Monterey 263]

It's a 2005 263 EX, DP

 

[Monterey 263]

Engine completed and on the dyno, firing it up tomorrow. Purchased the cable and programming software from OBD. Wish me luck.

 

[alldodge]

Good luck

 

[Scott Danforth]

did you spring for coated bearings? what are your rod and mains clearances?

 

[Monterey 263]

Yes to the coated bearings, and the rod and main clearances are at the looser end of the tolerances.