Brad, I know arcticfriend did actual dyno testing on 502 maybe he has info on the 8.1 also. Great guy any time I talked to him.
Isn’t Raylar the 8.1 performance expert? Maybe he has some info for you.
Engine looks good!

Liberator,

Yup. I’ve read the entire thread. And I’ve spoken to him and texted back and forth many times. I’ve reached out to him on this. Waiting to hear back. Patience is a virtue, they say.

I’ve also spoken with Larry at Raylar on numerous occasions. We haven’t spoken on this specifically, but I’m sure he’d agree, at least on the performance aspect.

Thanks. Brad.

The factory FA you showed does NOT really look restrictive, especially after gutting it. The replacement KN clamp ons they sell for 454/502 mags for most part are hp killers, my dyno testing showed it was the retarded adapter that took it from a rectangle to a circle that was the biggest restriction, hp killer on those, Smitty