This engine is supposedly a JJ 48 engine...

Rich your the one to tell us if thats correct

That looks like one of them, but for some reason the induction system looks different than I remember. Seems like they ran carbs for some of the testing. I do recall Donovan blocks being used.

In any event they looked a lot better than they performed........

like rich once said what works under a hood of a car does not work under a hatch of a boat!!!!!!! happy

wow... never seen that before. totally BAD A$$. can't believe DOHC never really caught on until now (1350) with big marine motors. I guess the tried and true BBC is hard to beat.

Were these ever put in boats?

Captiva- Its a V something? I guess we need an explanation of what it is and the old salts on here can tell you.

Wannabe

It's a ford dohc gaa. Sherman tank engine. They do show up in pulling tractors from time to time.

Aluminum block and heads,32 valve, 1100 cubic inches, 1000 ft lbs. torque at 2600 rpm and 525 hp @ 2800 rpm stock. Weighed in at 1400 pounds. That pick does NOT really gve you an idea of the size of it....

The biggest disadvantage to DOHC is the physical size. OHV motors package really well. I'd guess the 7.0L LS7 is similar in size to the 4.0L V8 in the BMW M3. Sure the bimmer has awesome specific output at 100+ HP/L. But in HP/ft^3 the LS7 probably still beats it, and crushes it when comparing TQ/ft^3.

In boat applications, the size and types of engine bays varies so widely. Their cant be general answer as to which is best. In a side by side application, a DOHC motor will need to be spaced further apart, or your block deck height needs to drop, reducing your discplacement.

For staggered and cat applications, go with the tallest decks, most cams and most boost you can afford!

I want to see pics of rubar. I couldn't get through the links to the prop site on my phone.

Those Ford tank engines are bad ass, but the problem I see would be getting them to run fast. You'd be looking a diesel like gearing with such a low red line.