Thats money well spent!!!

It really is, and without alot of B.S.

Did 1500 RPM bores out of my skull- I bought a used hydro-hoist and spent 2.5 hours towing it by water to my marina!! that sucked but the hoist is nice- Real pain in the butt..

Cosmic I think you are doughting my #'s-I thought a 525 is under rated so most likely it is 540hp

I don't dought your #s at all,I think it is great that you can pick up that much speed that easely. And I know the boat will take it and more. I am very happy for you .

I can vouch for the 10 MPH increase. I swapped my 502/415 for a 525 EFI last fall and saw the same increase in a 26' Sonic Prowler. I actually saw an 11 MPH increase and I'm still not done with props! Steve

I had a deal fall through on a 26 prowler which led to my A/T 525 is a nice engine for the 26-boat must move!

509, what speeds are you getting and does the screen name mean that you have a supercharged 509 in the boat now? So...what is the actual HP of a 525? 500 or 525 or....

So if I was going to build a new bullet for my 25 AT and it runs 70 now.......with a 415 w/gil exhaust and a K&N filter, its all in the X and the prop, if I get 500-525 HP I can run close to if not 80?

R I would think you would be getting there or more. Can you say LITE!!!!! I can't imagine there would be much of the hull in the water at those speeds, you might want to think about longer tabs

That would be nice haven a 525 in my tantrum.......maybe if I ever sell the stingray I could go blue

Cos, I'm doing an external hydraulic steering this year and finish it off next year with the full to the helm. I've always toyed with the idea of building a nice 500 horse motor for the Tantrum. The 1st Tantrum we saw was the Smith Bros. Racing Tantrum and it had a HP500 carbed motor in it. It ran high seventies to a low 80 depending on conditions....It had a full cabin sans the sink like mine. So I'm figureing......500-525HP....80mph!!

And about the tabs....I have the wide K-planes...and you know what they say....."If your not running on the edge, your taking up too much space"