Mopar Motors

[Mondolioni]

I've been looking into putting a hemi into my 22' Blackhawk. I can get a crate motor out of the US for less then half of the cost of a Merc that's comparble hp wise. Now already did my home work on the most obvious challenges up front: first one being exhaust and water jacketing couple possibilities there all the way up to custom fabricated to modifying exisiting. Also cam shaft timing which the crate motor guy swears up and down he can modify for this application. My question is this: Have any of you guys heard of someone doing a Mopar Hemi up for marine application, and if so what and how? Also any pointer you can give me would be great! It's got a pretty sick motor in it already but I like a challenge and doing something diff and original. Oh and don't tell me "can't" be done! Anything can be done I do "can't" all thge time....

Cheers

Joe

[Fishermanjm]

Joe, ur turning me on,,, i would love to see a mopar motor in a classic

[Carl C]

It can't be done.......

Without a lot of work and money and time and custom fabricated parts. Better go with the flow; BBC. I assume you're talking about the original 426 Hemi crate engine?

[silverghost]

I have not heard of a new Chrysler Hemi being put in any boat in 40 years !

You would have to custom build & fab the marine exhaust system~

The Crate Hemi cams are not good for marine engine use & will cause exhaust cooling water to revert into your cylinder head's exhaust ports & trash the entire engine.
You will need a custom marine engine cam grind.

You also will need a very rare Chrysler I/O drive Mercruiser bellhousing & drive coupler as this engine needs it's own specific bolt-up pattern.

Also Chrysler front or side & rear motor mounts.

With a custom built marine exhaust & custom marine engine cam grind. & chrysler I/O bellhousing+drive coupler & motor mounts it could be done however.

I assume you are talking about a carburetor & not a modern Fuel Injection engine as the F/I units would have F/I computer issues in a boat also.

My uncle had a 426 Hemi in a late mahogany Century Coronado.
Dual Carter AFB quad carbs~
Straight inboard.
Very HEAVY engine with it's very big iron heads

What a hot set-up that was in it's day~
Few were ever marined & sold.

It was the fastest boat in Wildwood NJ in it's day when new !

[HIGH LIFE]

Found a article in SpeedBoat Jan '08. VELOCITY VR1 powered by a 572 cu.in 700 H.P. motor built to Steve Stepp's specifications. Boat ran 100.2 MPH @ 5250 RPM. "HIGH LIFE

[MOP]

IMO it can be done! As far as an adapter a plate of 5/8" aluminum drilled for the existing bell housing the for the Chrysler pattern will work great, I had several made for putting various engines in rods over the years. Try to get the cam specs it may not be as horrible as some may think, there are a few very cam savvy gents on this board. The exhaust may be a challenge, you need to find out the port spacing, there may be a decent match using adapter plates it is done for Ford to Chevy on BB's. It all boils down to homework, jump over the rocks thrown in your path look at the guy in Germany that did an Audi/Donzi conversion. Anything within reason is possible, most of the guys up here never built a rod with miss matched drive train. Years back I built a 39 Chevy coupe with a late SB Chevy block, Cad/Lasalle side shifter running into a 4:10 Ford truck rear, all said and done I was tickling the 12's. Hard to BS me and a couple of others on what can and cannot be done, like I said find out all of your specs then let us old guys help a bit.

[silverghost]

Phil~
Does Trans-Dapt still make any transmission to engine swap Adapter kits ?
Are they still in business ?
Mr. Gasket Co. I believe bought this outfit years ago ?
I have used their carb adapters & marine leveling wedges many years ago.

I believe the performance crate Hemi engines sold today have a fairly radical performance auto musclecar style cam profile with a lot of valve overlap ?

[mrfixxall]

When your ready for the exhaust get the flanges made up for the exhaust ports on the heads and send them to jen at lightening headers and I'm sure he would be willing to build you a set for your application.

As for the mount to a bravo drive you could mount the engine to the stringers using custom fabbed mounts for the front and rear of the engine..a custom shortened scatter shield would work to enclose the rear of the engine for safety purposes..

[Buddyc]

Hey MOP ,39 Chevy Coupe... now your talking. My dad had a 41 and i loved that car as a kid... don't make them like that any more

[Carl C]

This one's pretty sweet. http://www.amazon.com/426-HEMI%C2%AE.../dp/B004TBNATO

[Donzi_Dude]

This one's pretty sweet. http://www.amazon.com/426-HEMI%C2%AE.../dp/B004TBNATO

now dont get me wrong, im not knocking hemi's. you can make crazy power but for marine BBC...

for 13K plus all the goodies, 500 HP seems steep.

you can have a marine builder set you up @ what ever power level you wish and crate you a super rat!

and im a ford guy.

[gcarter]

This one's pretty sweet. http://www.amazon.com/426-HEMI%C2%AE.../dp/B004TBNATO

I like the 300# shipping weight!!!!!!!!!
That would impress, if only it were true.

[JimG]

Call Steve Stepp. He's a super guy and a serious boat enthusiast. I'm sure he'd tell you the ins and outs....

Ray Barton built the motor...

[RedDog]

Hi Tek Marine .au could build you a cool 1 piece SS exhaust system.

[BUIZILLA]

i'm all ears