550-600 HP Small block
 

Just thinking out loud, natural aspired, EFI, keep them at no more than 600 hp, for bravo XR drives. Who can build em and $$$$$

Re: 550-600 HP Small block
 

:D :D

Re: 550-600 HP Small block
 

Talk to me, I know you have all the answers.

Re: 550-600 HP Small block
 

Problem is that you have to run them at over 6000 rpms to make power and the valvetrain suffers.If you built 427 SBs you could get away with it to a certain extent, but they would be pricey.They lack the Big Block torque that is just as important as HP

Re: 550-600 HP Small block
 

JC I was thinking of the small blocks for a easy side by side set up for the Y2K. Superboat has a already did a twin 350/377 Sm block Y2K so the layout ( stringers, etc. ) would be pretty simple. I was thinking of a pair of sm blocks so we could easy get over 1000 HP in the boat on the XR drives What do ya think ???The thought is to stay with the smaller drives as opposed to a single 1000 + on a # 6 drive.

Re: 550-600 HP Small block
 

The old RC Marine 30 Superboat went 85 with 450 a side with SBs.It was reliable at that HP.You could make 500 to 525 a side which would be a reliable combo.It would run in a Y2K hull. :cool:

Re: 550-600 HP Small block
 

So what your saying is 500-525 hp max on the small block for reliability??

Re: 550-600 HP Small block
 

Yes and money. :D

Re: 550-600 HP Small block
 

What way would be more cost saving 2, 500 sm blocks, or 1 1000 bb ???

Re: 550-600 HP Small block
 

1 1000

Re: 550-600 HP Small block
 

What about the # 6 cost, compared to the 2 XR's ??

Re: 550-600 HP Small block
 

How about the Sage#8 drive for the 1000. Jeff did say it would be the perfect drive for a Y2K with big power.

Re: 550-600 HP Small block
 

Rick I know the sage is a nice set up, But the merc. is very easy for local repair, you saw last summer Typhoon Perf. got me up and running with no down time on the XR problem.

Re: 550-600 HP Small block
 

Give us a call we can deffinatly help.
Thanks Mike
Roccard Marine Engines
www.roccardmarineengines.com
[email protected]
570-956-2840

Re: 550-600 HP Small block
 

Hi All,

Props to JCPerf

We do a 600 HP, SBC, 434 CI, Solid roller, Carb motor, but you'd probably be happier with a hydraulic roller motor, less tuning.

An AL head, BBC weighs about 650 lbs, an Iron headed SBC weighs about 570 LBs, and one motor gives you half as much tuning, repairs and better fuel and range, and half as much stuff to buy.

A new 500+ HP SBC isn't much cheaper then a 660 HP BBC, and the BBC has more torque.

We Do a 660 hp 540 CI, and 572 CI 725 hp/720 tq, Hyd Roller Carb Motor, both start at $11995 w dyno sheet.

We can detune a 540 to 600 hp if you don't want to break anything

We do a 598 CI, Hyd roller, carb motor, starts at $12,995 w dyno sheet.

We do a hydraulic roller 632 CI, 760 hp 790 tq, carb motor, starting at $14,995,

Lots of options available, we build to order.
Free shipping to lower 48 states on BBC Crate motors

http://www.offshoreonly.com/esvon/page-8499.html

http://www.offshoreonly.com/esvon/page-6210.html


Marine 434 600HP Pump Gas
Dart Lil M 9.025 Deck Nodular Caps
JE Pistons Forged Flat Top
Eagle 4340 Forged Steel Internal Balance Crankshaft
Eagle 6.0 4340 Forged Steel H Beam Rods with arp 2000 Rod bolts
King Alecullar Pro Race Bearings Rods and Mains
Mahle File Fit Performance Ring Set
Dart Pro 1 230 CC Heads- Fully Ported and Flowed
72cc Chamber
Stainless Valves
Competition Valve Springs
Titanium Retainers
10 Degree Locks
ARP Headstuds
Mr. Gasket Solicore Head Gaskets or Equivalent
Dart Intake Manifold
Milodon Double Roller Timing Chain with Torrington Bearing
Scorpion Aluminum Rocker Arms
Comp Cams Solid Custom Roller
Comp Cams Solid Roller Lifters
Comp Pushrods
SFI Damper Internal Balance
Moroso Oil Pans
Melling HIgh Volume Oil pump and Shaft
Aluminum Valve Covers and Chorme Timing Cover
Aluminum Stud Girdle
(Callies Crank, Manley Rods, Many Upgrades Available)

Starting at $10,899 w Dyno Sheet

I hope that helps

Thanks
Evan
Biggie Marine Motors
360 852 1237

Re: 550-600 HP Small block
 

Those big cube small blocks cost more than a big block... :rolleyes:
I know you said naturally aspirated Gary, but how about a set of 350s or 377s with small blowers.
Hey engine gurus how about 500HP SBC blower motors that will live 500 hours??? :evilb:

Re: 550-600 HP Small block
 

There is always the World Product's 454ci Smallblock.

http://www.worldcastings.com/new/feature0307.shtml

Re: 550-600 HP Small block
 

Hey Guys,
Are these big cube small blocks standard or tall deck blocks? If they are tall deck blocks, they may not fit side by side in a Y2K.
The standard 350s or 377s get shoehorned in. I know I wouldn't want to be the guy that has to change the spark plugs.

Re: 550-600 HP Small block
 

I read an article on a boat with whippled 6.2. Supposedly it made around 500HP from the stock 320HP

Re: 550-600 HP Small block
 

350mags or 6.2s with Whipples would be a great way to go... :evilb:
http://www.whipplesuperchargers.com/...sp?ProdID=1217

Re: 550-600 HP Small block
 

Pat you know I love the Whipple !!!!!

Re: 550-600 HP Small block
 

What about a small block of about 300-350 hp all set up to handle the whipple S/C ???

Re: 550-600 HP Small block
 

Here ya go Gary !!! 600 HP smallblock with 2 year warranty. I have to admit, they're cool. Retooled a 400 smallblock to accomodate the 4.250 piston of a big block 454. Its the same size as a 400ci SBC.
http://www.worldcastings.com/new/feature0307.shtml

Re: 550-600 HP Small block
 

If one wanted to go with a side-by-side SB set up what would change in the hull layup? And I know the standard answer on the staggered set up is its just expensive to do but maybe Rick or someone could go into a little more detail as to why a staggered BB set up is not already running. I still toss around the idea of using twins but I'm running out of time to make decisions...

Re: 550-600 HP Small block
 

Rick should have the twin Y2K 320's photos around.

Re: 550-600 HP Small block
 

I have pictures of the twin in my archives somewhere. I'll look for them tonight.
Rob,
There is no difference in the hull layup of a twin SB configuration. We just have to set up the stringers in the engine compartment differently.
As for a twin BB. The deck and cockpit liner would have to be modified. Alot of tooling and work involved.

Re: 550-600 HP Small block
 

GM Performance Parts sells a 425HP/383 cube aluminum head small blocks (ZZ383) for around 5k each.
Add closed cooling, marine accessaries, and EFI, another 5K each. Stainless Marine aluminum exhaust manifolds with stainless risers for 2K each.
Hook them to standard Bravo drives and you're good to go.
Total about 18K per side...
The boat is not going to crack 100, but for sure 90+... :evilb:

Re: 550-600 HP Small block
 

Pat,
Would'nt a marine application use a different cam ??

Re: 550-600 HP Small block
 

MY BUDDIE BUILDS MARINE 383,s 425HP FOR 6K. YOU DO NEED TO COME WITH SOME TYPE OF USABLE CORE. HES BUILDING 2 NOW FOR A SEARAY. CARB TO PAN WITH EXHAUST FOR 6K. I STILL LIKE THE TWINN IDEA BUT I REMEMBER SOMETHING ABOUT THE MOTORS BEING TO HIGH IN THE BOAT TO GET THE DRIVE HEIGHT CLOSE. LOWER THE MOTORS AND -3 IMCO LOWERS.

Re: 550-600 HP Small block
 

Found the Twin Smallblock Y2K pictures

Re: 550-600 HP Small block
 

I have more!!

Re: 550-600 HP Small block
 

You may be right FX.
The cam in the ZZ383 is pretty mild as far as lift and duration; I'm not sure as to the LSA.
A cam change may be required for the EFI as the cam was probably designed for a carb.
OK, add another few hundred... :drink:

Re: 550-600 HP Small block
 

couple more !!

Re: 550-600 HP Small block
 

PS
The motors don't have to get ""shoehorned"" in. They drop straight in. There's around 3" between them

Re: 550-600 HP Small block
 

Wow With The Drives That High Can You Trim The Drive Up With Out Hitting The Platform?

Re: 550-600 HP Small block
 

Zup,
The drives trim up alittle higher then they are in the pictures. If you over trim for trailering, they will hit the platform. You have to mark, your trim guage, or know where full trailer is.

Re: 550-600 HP Small block
 

I really like the twin small block !!!!!! Hmmmmmm, Rob think about it . :D

Re: 550-600 HP Small block
 

First Problem- The boat needs to break 100mph but I not going to spend ridiculus dollars on small blocks... so with twins how much horsepower is the guesstiment to beak triple digits

Second Problem- Anyone seen the new 30' Skater with ASD7's... Rick think you can make a setup like that work?

Third Problem- That engine compartment is really stuffed... how far forward would the bulkhead move to do a staggered set up?

Re: 550-600 HP Small block
 

Rob,
To answer your "3" questions.

1. I have a boating mag at work that did a test of a new boat with a Mercury 6.2 320 HP. The 6.2 was equipped with a whipple and made 500 Hp. A pair of those will definately see tripple digits. The 6.2 packages are relitively cheap and come with a Alpha drive. I'm sure you can upgrade to a XR for a few grand. The motor comes with a 6 year warranty.
I think the package is 11K, plus 5K for the whipple.
So fiigure 14K for the motor package with the XR upgrade, and another 5K for the whipple. Your talking around 20K motor, or 40K full. And it would look sick as sh@t with those twin superchargers!!
2. Sure we can do a surface drive application. BUT!!! Be prepared to pay for filling of the pad in the transom. The Turbine boat, which is being built after yours will have a surface drive, a Sage #8. I posted pics of it before on the Turbine thread. But it uses a "Zero" effort tranny, which all the big Mercury racing motors use.
The Sage is around 25K. How much is the ASD7 ??
3. To put twin staggered Big Blocks in a Y2K, the rear bulkhead will be mover forward at least 40", meaning, you'll loose alot of your cockpit. Not to mention the extra cost of making a custom hatch, and doing some serious modifying to the deck and cockpit.

Re: 550-600 HP Small block
 

And max torque is only 750 with the ASD7. Monster motors put out more then that. The Sage # 8 handles alot more.