I've often wondered this.
So the Raptor engine isn't simply a tuned F150 ecoboost?
I assumed it was...
Raptor is 10.0:1 CR while the non raptor is 10.5:1. (Gen1’s were 10.:1)
The above CR is a change in solely piston, meaning no head gasket or another changes.
Same rods and bearings, clearances and specs.
Pistons are a better piston but still cast, and oil squirters are a little different to accommodate the hollow cast in galley in each piston which oil injectors into at BDC to keep it cool and ring lands specifically.
Non raptor pistons are. It as nice, and have no cast in oil galley in the piston which is what it is, we’re talking cast pistons. Raptor has nicer and one of nicest cast pistons. Not to be mistaken for a nice piston when you compare them to a 2618 forging or even high silicon forged piston. Example being raptor piston is probably
2 bucks to make, maybe $2.25, non raptor maybe $1.00-1.25 and forged pistons like what we have just the rings alone are on another ballpark let alone the 5 axis crown and undercrown milled forged side relief piston design we spec.
The piston rings, along with no oil drain backs in 3 pcs oil rail on the raptor pistons means all the oil scraped down the cylinder wall has no ingress for pin lubrication and ford wants 100% of it to lubricate the cylinder walls. Oil squirters for raptor handle pin and cooling piston. It’s freaky not seeing oiling holes drilled through for piling pin like a manufacturing error occurred or something. Interesting stuff.