I had a cast steel crank in my old set up and it dyno'd out to 512hp but I never spun it past 6200rpm (385cid). I had it in the car for about 2yrs with around 40 1/4mi passes on it. When I tore it down to upgrade it still looked brand new, I sold the whole rotating assy for 500.00
It would be for street use. Maybe take to the drag strip once in a while.
It is a chevy 350 64 cc heads. 2.02 int valves. 550 lift cam. performer intake. 750 cfm carb.
350 block, bored over .040", Scat 9000 cast steel crank, Scat 4340 5.7" rods, Keith Black 18cc D dished hyper pistons (385cid), Howards solid f/t cam: 240/250 @ .050, 282/290 advertised, .525/.525" 110LSA, 106CL, howards billet alm 1.6 rockers on intake and 1.5 rockers on exhaust (corrected lift .560/.525"), DART iron eagle platinum 200cc heads with a decent amount of machine work done to them, milled down to 58cc combustion chambers (10.4:1 CR), tight .038" quench, performer rpm intake with the plenum divider milled down 1/2" with 1" spacer, 750 double pumper rebuilt with a holley trick kit (dual 50cc pumps) with some mild shaving of the butterfly rails. hooker super comp 1 3/4" headers, 60K HEI distributor...
ran on pump gas (93 octane), i had it professionaly tested and tuned (broken in) and they came out with 512hp/492tq.
I remember in one of David Vizard's books he stated he uses cast scat 9000 series cranks in nitrous motor in the 700hp range. I don't have the book with me so I can't quote it exactly but it was somewhere in that range for a sbc.
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