25' Eliminator Eagle. Supercharged 502 mag, bravo 1 with IMCO lower, 1.5 ratio I believe. Aftermarket headers.. Running a stainless 28P lapped. With bigger HP numbers, should I be running a 30+ maybe?

Depends on what RPM you're turning the 28

Well, at wot it'll turn 5000 but just cruising at 40 yesterday I had to turn 3k ish. Feels like I'm never really putting much of a load on the motor is why I'm thinking bigger. Not that I do, but if I hammer down out of the hole I can about bury the tach. Seems like with the power there, ide still have the grunt to spin a bigger prop when needed but could also cruse around at a lower rpm.

With a 30 you will probably lose about 300 RPM on top, try it. You may add a little cup to the 28 and see if it helps.

I'm not sure what a little cup is? Kinda new. I do know my 28 has been sent off twice to be re worked... I've got a stock 30 but was told that would perform worse than my lapped 28..?.. My buddy with a similar setup on a 28' eagle runs a 33 I think so it got me thinkin. Thanks again.

Definitely try the 30.
Who did the work on the 28? Are there any serial numbers?

Brett

I'll have to check it for numbers but it was a place in Denver. Maybe the last owner can tell me. He said he sent it in to get tuned, then he hit a and barge or something so he sent it back to be fixed..

Who knows what that 28 is by now, you have nothing to lose by trying the 30.