Hi everyone,

I'm looking to increase power in my 97 f150 4x4. Since there are no decent aftermarket intakes for the 5.4 2V, my initial plan of Trick Flow 185 heads and custom grind cams is out so that leads me to plan B, a Lightning SC swap. I understand that I will need PI heads, I also know that using PI heads on NPI pistons yields higher compression, a good thing for NA motors but not so good for SC applications. My question is - will the bump in compression grenade my stock bottom end sooner than if I were to use PI pistons? And please don't speculate, I'd like someone with actual knowledge on the subject, not regurgitated nonsense.

Thanks guys,
-A

 

Hi everyone,

I'm looking to increase power in my 97 f150 4x4. Since there are no decent aftermarket intakes for the 5.4 2V, my initial plan of Trick Flow 185 heads and custom grind cams is out so that leads me to plan B, a Lightning SC swap. I understand that I will need PI heads, I also know that using PI heads on NPI pistons yields higher compression, a good thing for NA motors but not so good for SC applications. My question is - will the bump in compression grenade my stock bottom end sooner than if I were to use PI pistons? And please don't speculate, I'd like someone with actual knowledge on the subject, not regurgitated nonsense.

Thanks guys,
-A

 

On any given engine , anything can happen.
Normally you do not super charge on high compression.
Adjust the blower pressure on stock CR as needed, with in reason.
Another item that takes blower engines out is to much ignition timing.
It blows and breaks piston crowns and ring lands and blows head gaskets or related hardware.
It's up to you so you need this basic info to run with.
On an NA engine that a blower is installed on, the PCM timing should be dialed into the program by a good experienced shop.
The fuel tables adjusted as well and possibly larger injector capability because you cannot get more power from the additional air without more fuel being burned.
Good luck.

 

you would have to keep the boost level down low, like under 5# on pump fuel

 

https://www.f150online.com/forums/19...mpression.html

 

Threads merged.