to much hp ?

D

debt finder

Cadet
Joined
Jun 18, 2007
Messages
19
i have a 82 sea ray sundancer with a 350 on its last leg . tired of messing with it i bought a rebuilt 350 thats pushing 330 hp, stock hp is 260 . some of the posts I've read said that I'll blow apart my out drive . if this is true is there a different out drive i can put on without changing the bell housing and transom plate . give it to me strait how much BS am i getting into ?
 
BAYLINER185

BAYLINER185

Chief Petty Officer
Joined
Jul 30, 2007
Messages
474
Re: to much hp ?

I take it you have an Alpha One?

The Alpha is good to up to 300 Hp Max

The Bravo One is the next step up and good for a max of 400 Hp

You do need a differant bell houseing though. I think your transom plates and Trim system is the same though so you have a few things that will need changing out.

I do beleive your Alpa will be over worked with 330 HP but you may be able to do a drive cooler and and get it to except the added 30 Hp. Im not really sure if there is a drive cooler also known as a drive shower for an Alpha Drive.

Im not even sure how a drive cooler works. Ive read some posts and seen one at a boat show (bravo one) but I have no idea how they work or if they really do.

Go to:
http://www.mercurymarine.com/engines/inboards/sterndrives/bravoone_specs.php

This is the info on the Bravo One drive and you can also get specs on the Alph drive here as well.

Of course this if you have a Mercruser to begin with!
 
Don S

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: to much hp ?

i bought a rebuilt 350 thats pushing 330 hp stock hp
Click to expand...

If it's an automotive engine, it won't last long in a boat. If it's actually a marine engine with that HP, then the Alpha isn't the drive you need or want.
 
J

John_S

Rear Admiral
Joined
Jun 21, 2004
Messages
4,269
Re: to much hp ?

As far as the drive, given the 330hp is a rating at the crank, it will be very close to 300 at prop, which the merc are rated at. Don't hammer it, and probably ok. Drive shower will help keep things cool if you make long wot or near wot runs.
 
Bondo

Bondo

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Apr 17, 2002
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71,148
Re: to much hp ?

give it to me strait how much BS am i getting into ?
Click to expand...

Ayuh,.... Without More Info,...

There's No Way to tell you how Much BS you're getting into........

Like What Drive are we talking about,+ What are the Spec.s on this 330hp motor........
 
mkast

mkast

Lieutenant Commander
Joined
Nov 6, 2002
Messages
1,934
Re: to much hp ?

With the type of questions you're asking, sell the rebuilt engine.
Get a stock marine engine, less headaches, money and wasted time.
If you bolt that rebuild in, you will have to change the gear ratio on the Alpha to 1.32:1 from the stock 1.5:1.
 
D

debt finder

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Joined
Jun 18, 2007
Messages
19
Re: to much hp ?

this is all i know about the motor.This is a chevy engine that is completly rebuilt the block was vatted, magnafluxed, bored with deck plate (.030 over) aline honed, has all new brass expansion plugs, cam bearings installed, new sealed power flat top pistons with perfect circle moly rings,Fel pro gaskets, recon rods, new clevite 77 rod and main bearings, reconditioned crankshaft ,new melling oil pump new pick up screen, new RV cam and lifters, new steel roller timing chain and gear set reworked 350 heads with all new parts,valves,springs,guides, hard ex. seats, 4V intake complete from intake to pan this is a top notch engine that will give very good performance would be great for a street rod or 4 by 4, it is 9 to 1 compression and will run well on pump gas, puts out around 330 horsepower this is a 2 pc rear main seal,block .I will ship to a roadway terminal nearest you buyer will have to pick up engine at the terminal this engine is not yet built it will be built for you exactly as described after you buy it . if you want to upgrade some of the components e-mail me and we can discuss your needs we can taylor this build to marine for additional $250.00 as for my out drive i believe it is a type 1 model 260 mercruiser
 
D

debt finder

Cadet
Joined
Jun 18, 2007
Messages
19
Re: to much hp ?

they said the 250 was for the marine cam and seals ? whywhyzed ,do you know where i can get a new crate 350 engine for $1,628.13 ?
 
Fishermark

Fishermark

Vice Admiral
Joined
Oct 19, 2003
Messages
5,617
Re: to much hp ?

Just google the chevy part number: 10067353 and you will find several places that sell it. In fact, Scroggin Dickey advertises that engine for $1499.95.
 
B

buggs

Cadet
Joined
Apr 22, 2008
Messages
8
Re: to much hp ?

I'm considering a GM #12499529(about $1850). Rated @290 hp. At boat WOT , I would guess it to be closer to 260 hp. Don't know if #10067353 has the desired hp. Any suggestions from any piston-heads ?
 
Bondo

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,148
Re: to much hp ?

I'm considering a GM #12499529
Click to expand...

Ayuh,.....

If you want to dig up a build sheet on it, with all the spec.s,....

Then We can comment on it.....
 
J

jdooner

Seaman
Joined
Dec 8, 2006
Messages
52
Re: to much hp ?

Googled the above engine and it's not intended for marine use according to Jegs, etc. Sorry to be the bearer of bad tidings..
 
J

John_S

Rear Admiral
Joined
Jun 21, 2004
Messages
4,269
Re: to much hp ?

You will have to search for the part numbers, but lots of info here:
http://www.sallee-chevrolet.com/ChevySmallBlockV8s/290hp350gm.cfm

Ck the head gasket part number, but think it is a ss steel/graphite, which would be ok for marine.

Need more data on cam but there is a good chance it is a problem, based on lift/duration.

I'd also make sure the 76cc heads were heavy duty.

The 290hp is crankshaft and w/headers. W/4brl intake, it is probably a 250hp at prop.

I prefer this one:
http://www.sallee-chevrolet.com/ChevySmallBlockV8s/330.cfm
But you still have research to do.

You need the cam spec but appears a little milder than engine above.

This will be no problem w/alpha drive. prop hp will be around 280hp.
 
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