What crank? Eagle, Scat, Calias, Crower?
 

My brother is building a BBC for his Jet boat and asked me what crank he should use. I have heard Eagles are all over the place as far as journal measurements.

Any experiences or opinions?

check lunati, they have some good stuff great customer service,and tech

I just bought two Scat's for my builds, about 700.00 each, I heard the same thing about eagle, high end Callies

Eagle and Scat are chinese junk, ask my machinist about his own drag car...
Not a place to skimp.
Callies and Crower are both good. The others are popular cuz they're cheap.

It really depends on what horsepower level he's building and how hard he runs it. Scat is great for applications within their designed stress levels. Crower and Callies are stronger units.

Adam? Thanks for the input. You know you have one of the best looking PQs on the water! Got rid of those checkers! JK

Thanks man.
It does depend on what kind of power levels you're dealing with, I just like to err on the side of overkill when it comes to engine parts. The callies in my mud racer BBC was like $2500

They are great as long as the crank snout does not break off.

Sonny Bryant has nice cranks too. hf...

Howard's makes a nice pro-series crank 4340 good for 1000hp at a good price I put them in my new dart motors .Still cost around 1200 bucks .Howard has been doing cranks rods and cam's for 30+ years.Just my 2 cents. JOHN SR

The material, and a proper balance job from the CRANK is more important then anything else from what I have found.

My 427ci small blocks putting out 540HP just came apart for an inspection at 150 hours and there is nothing wrong with my Eagle Cranks or the entire rotating assembly from Eagle. I did how ever re-ring when I put it back together.

you said jet boat rite..stay away from the low buck forged crankshafts...jetboats spin high rpm's more so then a sterndrive boat so you want a crankshaft that can take the constant abuse..a decent cheap crank is a lunati or crower crankshaft that might live,,if he wants the best then he will want to spend the extra money on a bryant or a winberg crankshaft..http://www.winbergcrankshafts.com/ http://bryantracing.com/

The longer the stroke, the more concerned with crank quality I would be. I'd use a scat 3.76'' or 4'' stroke all day long and have no worries spinning it. Now, a 4.625'' stroke, i'd wanna be spending some money on the crank.

The last two cranks I bought, 496 stroker and a 454 were both from Scat. The crank guy I use (about 900 years old) says Eagle are starting to suck now but Scat has got a lot better. I forget exactly what he said but but it was something like Scat is getting better because they are really trying to get into the higher dollar performance market in the U.S. and if their base stuff don't work no one will ever buy their higher dollar stuff.
Just like with bayliner in the 80's. Even though their yachts were very well built like everyone knows their entry level stuff was junk and almost took down the whole company.
Also just a FYI. One of the reasons people are having issues with the the snout breaking off is because they use fluid harmonic balancers. Let them sit more then a day or so and the fluid flows to the bottom and when you start the motor it's unbalanced and cracks the snout and then its just a matter of time.

the eagle cranks are strong,but the journal diameter is not consistant,at least on the ones i have used,i wont do any assembly with eagle cranks anymore.the scat cranks are better,and like chris vogt said,they are good if you dont use them in high hp or rpm applications.imo,the callies magnum crank offers the best value,and is a tough peice,and sizes are spot on on everyone i have used.if its in the budget,go with the calies magnum.

Great info guys, I am sure it will help him quite a lot!