Re: 512 stroker, RB or B block which and why
[Re: twayne24365]
#1966977
12/10/15 12:11 PM
12/10/15 12:11 PM
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gregsdart
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I've head on a 400 based motor when you get to the 500" mark the pistons have very short compression height which can sacrifice durability.
The rb platform with the 10.72 deck hight is perfect for a 500" motor. And can't be much heavier Not true. You can get into a rather short piston height (1.12 offered as a shelf stock piston)if you want to, but 1.32 used in a 512 build is not short by any means, just in comparison to boat anchor stock type 440 pistons. Look at the deck height and compression height on a lot of BBC stroker combos for a comparison of what works. The other thing, and most important when building a lot of power, is the strength of the 400 block. Much better than a 440.
Last edited by gregsdart; 12/10/15 12:15 PM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 512 stroker, RB or B block which and why
[Re: gregsdart]
#1966984
12/10/15 12:21 PM
12/10/15 12:21 PM
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Posts: 13,247 Mt. Vernon, Ohio
dartman366
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I've head on a 400 based motor when you get to the 500" mark the pistons have very short compression height which can sacrifice durability.
The rb platform with the 10.72 deck hight is perfect for a 500" motor. And can't be much heavier Not true. You can get into a rather short piston height (1.12 offered as a shelf stock piston)if you want to, but 1.32 used in a 512 build is not short by any means, just in comparison to boat anchor stock type 440 pistons. Look at the deck height and compression height on a lot of BBC stroker combos for a comparison of what works. The other thing, and most important when building a lot of power, is the strength of the 400 block. Much better than a 440. ^^^^^^yep,^^^^
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: 512 stroker, RB or B block which and why
[Re: dartman366]
#1967132
12/10/15 03:38 PM
12/10/15 03:38 PM
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twayne24365
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I've head on a 400 based motor when you get to the 500" mark the pistons have very short compression height which can sacrifice durability.
The rb platform with the 10.72 deck hight is perfect for a 500" motor. And can't be much heavier Not true. You can get into a rather short piston height (1.12 offered as a shelf stock piston)if you want to, but 1.32 used in a 512 build is not short by any means, just in comparison to boat anchor stock type 440 pistons. Look at the deck height and compression height on a lot of BBC stroker combos for a comparison of what works. The other thing, and most important when building a lot of power, is the strength of the 400 block. Much better than a 440. ^^^^^^yep,^^^^ Well thanks for clearing that up for me lol
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Re: 512 stroker, RB or B block which and why
[Re: modelmakerinc]
#1967273
12/10/15 07:12 PM
12/10/15 07:12 PM
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gregsdart
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The one other thing that isn't mentioned enough is running a center weighted crank. When I went to one in my Megablock, the cap walk issues went away. I spin it 7500 plus rpm, and the bob weight is heavy at 2432. Do that in a 400 block, and I wonder just how much power could be put to the block and have it live a good life. Maybe as much as you could make with B1 heads?
Last edited by gregsdart; 12/10/15 07:13 PM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 512 stroker, RB or B block which and why
[Re: modelmakerinc]
#1967286
12/10/15 07:32 PM
12/10/15 07:32 PM
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moper
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Greg - whats the cost difference for the centerweighted crank vs commonly available cranks?
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: 512 stroker, RB or B block which and why
[Re: modelmakerinc]
#1967351
12/10/15 09:30 PM
12/10/15 09:30 PM
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polyspheric
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Glad I posted that, so helpful [crickets]
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Re: 512 stroker, RB or B block which and why
[Re: moper]
#1967383
12/10/15 10:30 PM
12/10/15 10:30 PM
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gregsdart
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I paid $2305 for mine from Crower, but it is made of the best material used in any forged crank. Other companies may make them, (Ohio? Callies?) and at a lower price. If the difference is $700 to $1,000, one busted block with a non counter weighted crank and you would have been even money and a lot of saved time going with the good crank $$ wise. Edit; Scat and Ohio are worth a call to see if they will build a crank with center weights. Scat does Billet cranks, so does Ohio. Ohio lists $1645 for a Hemi race crank for fuelers. They might build one for a standard app on request.
Last edited by gregsdart; 12/10/15 11:08 PM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 512 stroker, RB or B block which and why
[Re: modelmakerinc]
#1967757
12/11/15 03:00 PM
12/11/15 03:00 PM
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moper
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I'd agree an extra $1K for much longer service life is a good value over prepping another block - assuming you catch the first one in the "cracked but working" stage.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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