I see a lot of small and big blocks running Eagle and Scatt cast rotating assemblies. They seem very popular for street engines. Crate engine companies use them up to 475hp. I spoke to Scatt and he stated 450hp all day. Not to start a big debate over forged Vs cast, just looking for what guys are running and how much power they have. All thoughts welcome.:thumbsup:
How many guys are running cast cranks?
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adavis
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I see a lot of small and big blocks running Eagle and Scatt cast rotating assemblies. They seem very popular for street engines. Crate engine companies use them up to 475hp. I spoke to Scatt and he stated 450hp all day. Not to start a big debate over forged Vs cast, just looking for what guys are running and how much power they have. All thoughts welcome.:thumbsup:
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whats the max rpm you plan on seeing?
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While my preference is always a forged crank in a performance deal the Scat 9000 series cranks will take a lot of abuse in milder applications with limited RPM
Best (or worst depending on how you look at it
) example I have is a Modified Alcohol circle track deal that was about 550-600HP & ±6800 RPM as I recallThe guy ran this thing for over two seasons before he broke it (383)
Put another in & ran it for another couple of seasons,,,, same results except this time it took the block with it
I have at least a half dozen or so ±425HP give or take 6000 RPM 383's running around, some with a lot of mileage & I don't know of any these that have broken the crank in these kind of applications
All are Scat cast cranks, Scat I beam 7/16" capscrew rods & forged piston engines & all are internally balanced very well by me.
But again if it were me I would use a forged crank
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9.80's with a factory cast 400 crank--thousands of passes, many up to 8000+ (no rev limiter) many bottles of nitrous, 2 Power Tours, zillions of street miles, hundreds of dyno pulls.....
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Im running a scat cast 9000 crank in mine as well. Im guessing I make about 450hp or so.
You have a cast crank in the record engine?
I have a plan for a 383 010 two piece rear seal crank. Scatt 9000 rotating assembly, Edelbrock RPM heads. lunati 60103 227/233 489/504 Edelbrock Air Gap intake and tweaked Qjet. Hooker super comps w/ two chambers, no need to shift over 5500 rpm. Car will be street driven engine an is going in a 79 Vette.:thumbsup: I think this engine based on my research and input from this forum should live a long life.
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That was my old iron headed 406--Gil Nevarez built it in the early 90's as a dyno mule to try a few things. I inherited it when he sold his Nova while my engine was still inside. I still have the rotating assembly in my shop--some day I might put it back together as a REALLY low buck piece.
Stock cast crank here , just because I had it and funds were limited. Went to 7k weekly for two seasons until I realized it wasn't doing any good,so I changed the limiter to 6800. It May blow up next week ???? Next build will prob be forged , lighter and stroked.
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I was told since I was a youth, that a rod would go before the crank. In other words, the rods are commonly the weak link in the system so thats where I will put the beef. I'm no pro stocker and I tend to baby my car, since as a youth, I'd blow up a small block a summer. But hey, every now and then you have to have a Stang or two for dinner. Catch em at the light, devour em whole take er home and let her digest it. LOL. A guy once told me that only little boys wear bowties and I caught em with his mouth open when I said, Oh, yeah, but all little girls want Ponys. Ha ha. Any way, I will go with the cast crank, until my pockets get a little better. You guys are great and I have learned a few things from this forum.
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