ken258 wrote:
Did you put the Bravo three on?
How does it perform? Speeds? etc..?
ken
Hi Ken,
My brother bought this boat new (1987) I got it in 2005 and put the 454/Bravo III in during winter of 2006.
He told me that the Liberator with the 460/Cobra did about 60mph at 5000 rpm. (20p prop) and It was always fairly doggy out of the hole.
After I installed the stock 454 B3 he came up and drove the boat. He said it comes out of the hole and accelerates at any speed more than twice as fast as it EVER did even when new. Now it just ROCKETS out of the hole!
The best speed I have measured is 57 (GPS) mph at 4600 rpm (rev limit is 4700) with the 1.81:1 B3 and 26p SS props.
I would say that the HP with the 454 is about the same as the OMC 460 was.
In 1987, OMC rated the 460 at 340hp (crankshaft)
Mercruiser rates the 1997 7.4L Bravo III at 300hp (propshaft)
I was told that the Bravo I would have been a better choice since the top speed would have been a little faster (3-5mph) over a Bravo III.
I'll trade 3-5 mph any day for the incredible acceleration and hole shot of the Bravo III. It also handles FAR better at idling speeds.... forward and reverse.
I'd love to put a mildly built up 502 in it. With 30p props and 5500 rpm (8% slip) it would probably do about 80 then
http://www.go-fast.com/Prop_Slip_Calculator.htmI did the whole swap myself in my shop out back. (actually it's a hanger)
Regards,