Re: How much power with a two bolt main 454
 

All above are pretty much correct. We run a cast crank and 2-bolt mains in our Corvette and turn 6500 RPM and turn 11.90's. If RPM's are kept at 5500 RPM or so cast cranks and 2-bolts are fine in a pleasure HP marine engine. Racing engines that are used for racing really need steel cranks and 4-bolt mains, but most of us on here fall into pleasure boaters. :D

Re: How much power with a two bolt main 454
 

my 470hp/468 with 2 bolt & cast crank ran for 500 hrs with LOTS of time at 5400 rpm, until it's untimely death when it ran up on a beach and spun for almost an hour with no water at about 4000rpm or so till the boat caught fire -- I say bolt that stuff up right and go!

Re: How much power with a two bolt main 454
 

You're 100% correct.

Roby

Re: How much power with a two bolt main 454
 

What!!!! On the Beach.....almost an hour....4,000rpms.....no water? Full story Please, hope no one was too badly injured.

Re: How much power with a two bolt main 454
 

A well balanced cast OEM crank with a block that has good machine work will handle 600hp all day long. A 2 bolt block will handle what you want. . get into the 500 range I recommend studs, at 600 the caps start to walk and aftermarket splayed caps are really needed.

Chris

Re: How much power with a two bolt main 454
 

My engine machinist has a really slick way of using dowell tubes in conjunction with studs that keeps the cap still on 2-bolts. He has numerous 800+ HP 7500 RPM+ drag motors running 2-bolts with no problems relating to the cap moving. He charges about $250 to dowell and align hone the block and it is ready for action. :D

Craig

Re: How much power with a two bolt main 454
 

between SuperV and I we have 5 motors with cast cranks that make 500hp at 5600 and never had a crank related issue....