The engine clearly failed because it went lean. I know it went lean because that is the only way you melt the top of a plug. Even if it has a lot of miles, you can NOT blame this failure on age or weak parts. It went very lean and that probably burnt the piston and the top ring.
Showtime, did you have a WOT switch?
I have sprayed after the throttle body before, into the upper plenum. I spray a 75 shot into my N/A 2.3 like that with no problems. If you are spraying into the throttle body, long as the throttle blade can still move as normal, it shouldn't be an issue.
I still blame this on fuel supply and very possibly the fuel pump. While many can have have successfully run 100 shot on similar combinations, every car is different.
The SVT focus fuel pump has a much higher flow rate than your stocker, and for a lot of people, it is only good for around 400hp. So if the SVT pump is good for around 400hp, how will the stocker flow? I'd say 300rwhp is the upper limit. There are a lot of factors that effect when the fuel pump can't keep up... base fuel pressure, boost pressure, fuel filter condition, debris in the tank, ect, ect. My point is, even if the stock pump *might* be able to keep up, it is too expensive to risk it. It is so easy to change out the fuel pump that is should be the first thing you do when you add a power adder!! Weather or not insufficient fuel pump caused the failure, it is not a good idea to rely on the stock pump for these power levels.
As for lessons learned... always start at lower hp pills and work your way up and monitor the AF ratio.
Showtime, did you have a WOT switch?
I have sprayed after the throttle body before, into the upper plenum. I spray a 75 shot into my N/A 2.3 like that with no problems. If you are spraying into the throttle body, long as the throttle blade can still move as normal, it shouldn't be an issue.
I still blame this on fuel supply and very possibly the fuel pump. While many can have have successfully run 100 shot on similar combinations, every car is different.
The SVT focus fuel pump has a much higher flow rate than your stocker, and for a lot of people, it is only good for around 400hp. So if the SVT pump is good for around 400hp, how will the stocker flow? I'd say 300rwhp is the upper limit. There are a lot of factors that effect when the fuel pump can't keep up... base fuel pressure, boost pressure, fuel filter condition, debris in the tank, ect, ect. My point is, even if the stock pump *might* be able to keep up, it is too expensive to risk it. It is so easy to change out the fuel pump that is should be the first thing you do when you add a power adder!! Weather or not insufficient fuel pump caused the failure, it is not a good idea to rely on the stock pump for these power levels.
As for lessons learned... always start at lower hp pills and work your way up and monitor the AF ratio.