How much power with a two bolt main 454
09-15-2004, 08:02 PM
#11
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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. 
09-20-2004, 11:37 PM
#12
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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!
09-20-2004, 11:57 PM
#13
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Re: How much power with a two bolt main 454
Originally Posted by formula31
Lined honed and ARP studded block will handle 600 or so. Make sure its balanced real good and clearances are spot on. The 95 should be a four bolt, some of the earlier mark 4 330's were 2 bolt. Cast crank is fine if you keep the rpms below 5200 and everything is blueprinted.
Roby
09-21-2004, 01:16 PM
#14
Beak botr
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Re: How much power with a two bolt main 454
Originally Posted by Hang Time 27
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!
What!!!! On the Beach.....almost an hour....4,000rpms.....no water? Full story Please, hope no one was too badly injured.
09-21-2004, 02:06 PM
#15
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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
Chris
09-21-2004, 05:12 PM
#16
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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.
Craig
Craig
09-24-2004, 06:24 AM
#17
Charter Member #655
Charter Member
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....
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