Pacemaker Boat Owners Association

FullHouse

I have a 1968 Alglas 25' and I recently blew the motor. :( I found a pair of engines (althought I only need 1) that I bought figuring I can rebuild one og them and have some spare parts. The one had a 318 tag on it. The other I discovered last night says ###### 360 ## on the block. Not a 318. I know the 318 and 360 are the same block size. The questions are is it a good idea to put the 360 in the boat? Will I gain any speed above 19 knots? Will I have to change the prop? Any issue with the Velvet Drive trans being able to hold up to additional power? Any advise would be greatly appriciated.

By the way what is HP rating on a 360?

joebobb

As far as I know, Pacemaker used the same propeller for all the V8 25/26 foot boats...a 13x10 cupped, three-blade wheel. For Chevrolet based engines, this means the same prop for the 185HP 283 and the 270HP 350. I suppose one could optimize the propeller to some degree, but essentially, I'd think the stock propeller should be able to accommodate both of these Chryslers. You should without question gain some top speed potential...don't ask how much. I know that my boat will do 28+ kt with a clean bottom and the 350. I would expect something similar for a 360.

The Velvet Drive can handle the extra power. These transmissions are capable of standing up to big block gasoline engines.

Kind regards,

JoeBobb

Rich_P

The velvet drive should hold up but there are 2 versions. A 71 and 72 (72 being stronger)

70sprint

I run a 350 mag MPI (300hp) in my 1970 Pacemaker Sprint. I'm currently using a 13x13 Federal Super cup and seeing about 33mph at 4200 RPM, have not been to WOT. no transmission problems, although the cupping is causing some vibration.

Pacemaker Boat Owners Association

Upgrade from 318 to 360?

Log In or Sign Up

In This Discussion

Categories