693 HP and 723 ft/lbs of torque
 

Just got off the phone with Mark at Precision marine, the 540 that I built is making 693 hp and 723 ft/lbs of torque. Guessing that it should make my 1999 Donzi 26 ZX move pretty good.

That is good news. Welcome to the fast 26ZX club. What kind of speeds are you wanting?

Thinking 90mph, last year on a stock 502 with 5psi of boost I saw 80mph on GPS

ZXXX, What size fuel lines are you running to your fuel pump, and how did you plumb in the return to the tank?

You should get between 88 to 90 depending on props and setup.

I am running 1/2" all the way through. Eddie Young made a custom return line to the tank. There are some pictures posted on Boatfreaks.org Let me know if you can't find them.

You are going to have fun!

Hey Bill, We're going to be around Pates Ford next weekend. Going to see if Outdrive #3 will last!

I will be there and so will Brian Rose. Let's go burn some gas (not drives)!

Tell us more about the motor, great numbers

It is a stock Gen VI 1999 502 block. I had it bored .032 over and had a Cally's forged rotating assembly installed. I had the stock heads proted and polished. I am running Marren's 60 lb injectors, Custom ground crank that was spec'd out by Mark at Precision. M1 Procharger running Approx 5 psi of boost.

What is your initial comp? What timing? What chamber size on the head and what runner??