I don't think high compression will at that much more than that so but that still would be impressive numbers out of a NA 2v.

 

Its just a guesstimate me and a couple buddys discussed, could be off. I'd bank more toward the low side myself. My way of looking at it though is even though I've got all this money into it for small gains, when its blown everything I've put on it is supporting mods.

 

Just did some looking around, there's people claiming anywhere from 300-425 hp with no blower without running high compression. I'm going to say the 425 is bs, but getting in the 300-350 seems common

 

425 seems really high lol I was thinking in the 300-350 range. Once you add boost tho on top of what you have already done it should be impressive

 

I've heard those numbers possible from PI swapped 97/98 motors. but who knows.

and with the deck height of the 5.4 being larger, I'm pretty sure the intake manifold wouldn't fit on top of a 4.6 without a really tall adapter plate over a stock 5.4.

 

Pi swapped would raise the compression, none if these were higher than stock compression. I think some of those guys were just full of **** lol

 

yeah probably. without higher compression I have no idea where their numbers would be coming from. even ported & polished it'll just flow air better but I don't believe it would raise numbers anywhere that high.

 

The most I've seen was 360 NA at the wheels from user Neil the HP Freak at F150 online. However, some were skeptical at that number. I imagine the build is still over there. He documented it online.

 

He's only at 8.4:1 compression ratio from what his build says

 

Lots of the 5.4 4V mustang guys I've seen have been running 350-400hp