Predator motor direct injection question

[jbyrnes]

I'm guessing for emissions and efficiency the Predator motor has direct injection, which means it's prone to deposits building up on the upstream side of the intake valves without the fuel to clean them. This is a common problem with all direct injection motors as I understand it, especially with the increased blow-by of forced induction, and usually by 40 or 50K miles begins to effect flow resulting in reduction in HP. I heard there was talk of adding another fuel injector upstream of the valves to solve this problem. Does the Predator have a way to prevent the deposits? I've added an oil separator system in the EGR circuit of my eco-boost motor which solves this deposit issue but guessing that the factory would never go that route, even in the GTD, since it adds another thing for the owner to have to service.

 

[Joetwint]

Predator engine has port injection.No direct injection

 

[jbyrnes]

Predator engine has port injection.No direct injection

With a little more searching I'm seeing that the Predator uses a direct injection system in tandem with port injection, so then I don't think there'd be any valve deposit concerns.

 

[saleenrose]

I'm guessing for emissions and efficiency the Predator motor has direct injection, which means it's prone to deposits building up on the upstream side of the intake valves without the fuel to clean them. This is a common problem with all direct injection motors as I understand it, especially with the increased blow-by of forced induction, and usually by 40 or 50K miles begins to effect flow resulting in reduction in HP. I heard there was talk of adding another fuel injector upstream of the valves to solve this problem. Does the Predator have a way to prevent the deposits? I've added an oil separator system in the EGR circuit of my eco-boost motor which solves this deposit issue but guessing that the factory would never go that route, even in the GTD, since it adds another thing for the owner to have to service.

Up to this point as stated before, the predator engine is essentially a Gen 2 design with port injection only. The Gen 3 Coyote is a direct injected and port injected as well. The Gen 3 has 17# injectors for the ports. I believe Ford has learned this lesson in.past issues. Many other manufacturers also had the carbon buildup issue as well.