waterboy222

I have the 330 hp 454's with Bravo 1's and no hydraulic steering. Im considering a complete repower this spring and im not really sure how to go about it.

I think the boat has reached its lowest value that its going to be able to get even with a big repower so sticking with Mercruiser just for resale isnt going to help me any. (in my opinion)

Ive found a couple of places online that I can purchase a base 540 bulldog/attackdog type engine for around $8500.

What other expenses should I add on top of this? Will any of the parts from my 454's work to dress out the 540's or will i need to buy all new stuff?

Can someone give me a quick estimate or rundown of what its going to cost to do an upgrade like this or should I just have my motors rebuilt and upgraded for more HP..

Im running abt 70 right now and would like to run 85-90 but dont want to have to change drives because they were just rebuilt. I know ill need to get hydraulic steering for those speeds and torque.

Any advice? its for my 32 Sunsation Dominator.

P Offshore

Punt

Payton

That sounds like the price from 1 800 runaway, I mean runsnew. Do a search on OSO for them and get the whole story. I seems their engines can be good, but if you need the warrente they are worthless.

One, of many, other things is your motor mounts. I would think you would want offshore style mounts rather than the stock Bravo mounts, if you don't have them.

Chris Sunkin

Nothing in the 330 is usable for what you want to do. They're pretty much low-po motors and won't take kindly to performance mods.

$8500 sounds about right for low-end 540's but you're going to have to add in better coolers, all-new exhaust, solid mounts if you don't have them already, carbs, ignitions, etc. And a new fuel system. With hydraulic steering you're probably looking at $30 grand. Do you want to put that much into the boat? Maybe it's worth a look at what your boat and $30K will get you in another boat.

540's are also going to be hard on those Bravo's.

RunninHotRacing163.1

Waterboy get ahold of jeff1000man he'll set you up and probably got one laying around ... we are just finishing one now and with a 4 bolt, rotating assembly from Dynaflo , a good set of heads & the blower off OSO classafieds were at 5800.00 to date and only thing left is the nickerson carb and fill it with oil ... that 540 will smoke thru drives but pickup some spares for 1000.00 apiece and keep one in the pickup and run the chit out of it

jryan26

You might consider just stroking those to 496's, following this combo and et around 640hp.

http://forums.boatfreaks.org/showthr...&highlight=496

Chris Sunkin

Small oval heads and 2-bolt mains on those 330's would be a barrier.

jeff1000man

Either set actually right now.

http://www.offshoreonlyclassifieds.c...o21049-en.html

http://www.offshoreonlyclassifieds.c...o20829-en.html

I can leave the blower out of the equation on the 540's.

You could send me you 330's and get them upgaded also if you want.

Either set of engines is going to get that boat in the high 80's low 90's

We have one of those boats down here right now with 600 HP a side and it runs in the mid 90's.

excalibur32

You can have the two bolt made into four bolt.

jeff1000man

Technicaly yes, you add the 4 bolt caps and have the machine shop drill them in and you have a 4 bolt.

I actually don't do that though. I just use the 2 bolts for other projects, and sell the 4 bolt blocks as part of the deal.

I sort of have an iron collection down here.