Call Scott at Speed and Custom Marine in Quincy, FL. Phone number 850-875-0381. He has a 496 HO that was ran hot and blown up. Maybe some parts you can use. Tell him Craig gave you his number.

thanks for the info.

all i need is cam and computer?

My first engine in the ZT260 was a whippled 502 that made 760Hp on 93 octane and 800Hp on 110 octane. Top speed with 760Hp was 87mph and 90mph with 800HP. This was with a standard length mercury sportmaster 1.35 ratio and a bravo 26 pitch.

Hope that helps.

Been a while. Motor dynoed at 635hp/650ft lbs. torque. -2 shortie works well. 5000 rpms at 79 mph with 1.36 xr drive stock out of the box bravo 1 26. These numbers were disappointing due to cam selection mostly. So now M3 Procharger on the way.

First run with pro charger was 90 mph. Only made 2.5 lbs boost. Ordering new pulley to get it to 5lbs. Not a bad run for 2.5 lbs.

Nice! Gotta love the M3's!

i believe i have a procharger pulley that was good for 7psi on my m1 i had. i will have to look and measure it. if you can find out what measurement you need i will check mine. will let it go cheap!! it is a 12 rib pulley. i will check diameter also

you can email me at maurer70 at sbcglobal.net if youd like.

just an offer to help.....

Not bad is right!

Congrats on the new power.

HD

wow, id be afraid to run 90 on my 26 zt. lol thats nuts, have to be perfectly calm day for sure!!!

Was not bad. You have to drive it but it is not stupid. We will see with the 5lbs of boost.