Chevy 572 in three steps

[Mange]

Just a another story of a engine,

2006 First started out as a crate engine GM ZZ572/620hp in box.
My friend Johnny who is a great engineer
Did the marine conversion, head job with Inconel valves and some other updates.
Added a Holley 1000cfm carb, 14q oilpan and high vol pump from Hardin Marine, CMI Sport Tubes and MSD Ignition.
631,4hp@5400rpm in dyno. Pretty common on a ZZ572 I think.
Also added Marine alternator and starter. Bravo coupler and mounted the engine in my 28 Pantera Race. The boat did 80mph in rough. On flat water mid to upper 70. Sold the boat less engine same year.

[Mange]

2007, Since I already had a new bare hull, a 28 Arrow, we wanted to put the 572 in it. But with some
modifications . New Venolia piston to lower the compression, new timing chain, refresh the heads, new mains etc.
Added a 2.6L screw from Swedish Autorotor, a modded Super Chiller, a modded EFI-intake, Aussie Autronic SM4 fuel injection, found a new set of strange looking CMI headers really low style with the shortest tail pipes out there… We also did a very nice system with a surge tank…
The foot throttled boat handled really well and I never see any speeds above 96mph but I had 90mph rides on daily basis.
I really never had it dialed in with the right prop and could used a 1”
drive adapter.
We had a lot of great rides with the boat and had some races to.
I think I had 2500 nautic miles total with this boat. Pleasure and races.
In dyno we had 875hp@5700rpm and torque 1310nm/4000rpm.
Pulled the engine last year and sold the boat less engine this year.

[Mange]

2010, the engine torn down. Decked the block 0.1mm, the stock heads needed 0.3mm. New ring’s, mains, valve job etc.
New rods from Auto Verdi (may some Nascar fan’s here know’s Verdi dry sump pumps?) Well, Stefan Verdi is a very special guy and know’s his stuff.
New main caps from Pro Gram in Ohio (delivery time as the german people learned during the WW2 when they ordred the first gen1 VW beetle..)
Modified the EFI intake for new bigger injectors. A new Autronic SM4MR ECU.
A new adapter unit between the new screw and super chiller, design WMDC (my good friend and board member Tomas Wallin).
The new charger is one of the first 4 4.2L screw from HPS SuperchargersAB.
We will also go with one coil per cylinder. I know it’s A new cam on it’s way over the pod. It’s many more details of course.

Don’t mind the old black block with tiny oil pan. Johnny just use it as a “jig“ when he working with the top parts.

When I write “we” it’s Johnny. I don’t do a sh*t more than open the leather…

Maybe I can use a hull too.. :sifone:

If somebody finds this interesting I’m happy to do some updates in this thread during the process..

Mange

[BBB725]

Always interested, especially with winter coming

[detail toyz]

Whats the latest hp??

[Coolerman]

looks awesome, keep us updated!

[Bobcat]

Keep em coming !

[Mange]

Whats the latest hp??

The latest hp is that 875hp in step 2. The engine builder is working with the engine as we speak. We are going for a mild concept and about 1050hp.

Johnny, the engine builder just did the charger set up on this 598ci Pat Musi, 1300hp on E85. Low boost.
We are going with a simular pulley plate at my 572.

[rschap1]

COOL stuff!

[dykstra]

Way cool!!

[Mange]

Some progress on the engine project :)

[Buoy]

That's looking GOOD!!

[jrz]

There is only one set of that style header.

[teamsynergy]

Some progress on the engine project :)

Looks good but why the big chuck of billet? You could have surely milled out sectional areas to reduce weight, increase air flow past the front side of the motor, ect... why didn't you do that? Curious?

[Mange]

Looks good but why the big chuck of billet? You could have surely milled out sectional areas to reduce weight, increase air flow past the front side of the motor, ect... why didn't you do that? Curious?


That's looking GOOD!!

Thanks man :)

[Mange]

There is only one set of that style header.

Oh yes :D I sold that set.

[Mange]

Looks good but why the big chuck of billet? You could have surely milled out sectional areas to reduce weight, increase air flow past the front side of the motor, ect... why didn't you do that? Curious?

Thanks :)

The builder are not done yet. he will mill it out more, just what you think.
But we also use the pulley plates backside.

[sweet addiction]

This is very neat. I think most of us can agree that working on a basic stocker is a pretty big task. I cannot imagine taking on a project like that. I do not have that knowledge though. Long story short, very cool and unique!

[Mange]

It's about time to do a little update here. The "new" engine is ready. Last July I was going to NY and had a deal on JC's 32 Activator. Perfect boat to match my new motor. I doing the Pre-rigging now and when that's done I'll remove all things and have the engine room painted.

73249732507325173252

[Bobcat]

That motor looks sinister !!

[SFOcean]

Mange, let me know if you need a big prop for all that power.
I have an 18 x 33, 15 degree rake right hand five blade Mercury Racing prop you might like. You will like the price too.
I need to try it on Slim Shady first, that should happen in a few weeks; still breaking in the new engine, drive and transmission.
I do not think I have the power to turn it even with my new (or the next being built now) engine is why it will most likely be sold.
If you want to see the high-resolution photo, PM me.

[Ratickle]

It's about time to do a little update here. The "new" engine is ready. Last July I was going to NY and had a deal on JC's 32 Activator. Perfect boat to match my new motor. I doing the Pre-rigging now and when that's done I'll remove all things and have the engine room painted.

73249732507325173252


That motor looks sinister !!

Kind of has that Darth Vader look going.....

[Mange]

Mange, let me know if you need a big prop for all that power.
I have an 18 x 33, 15 degree rake right hand five blade Mercury Racing prop you might like. You will like the price too.
I need to try it on Slim Shady first, that should happen in a few weeks; still breaking in the new engine, drive and transmission.
I do not think I have the power to turn it even with my new (or the next being built now) engine is why it will most likely be sold.
If you want to see the high-resolution photo, PM me.

Hi Greg,

You have a PM ;)

[Mange]

Had the carbon fiber exhaust rings and gaskets done yesterday. Turned out very nice I think :)

732707327173272

[Ratickle]

Did you have the carbon layed up on a template to match the curve of the transom? It looks really good.

[old377guy]

very, very nice

[Ratickle]

Eerily similar......


73278


73279

[Mange]

Did you have the carbon layed up on a template to match the curve of the transom? It looks really good.

We had it laminated directly on the transom actually :) 73280

[Ratickle]

With mold wax release? Or wax paper? Or ?????


Great idea.......

[Mange]

With mold wax release? Or wax paper? Or ?????


Great idea.......

Thanks!

Just regular transparent tape :) Easy to remove! Then I did a template of cardboard to cut it to the final shape.