My old man Ran several scat cranks in blower motors in the 90’s. Never had one let go.So I picked up a boat with a 557ci twin turbo. Engine built in 1994 with excellent parts according to the build sheet...EXCEPT it lists a SCAT pro comp series 4.25” crank. Any chance SCAT was a good crank back then???
I would say at 7 psi you will be alright, and I would probably run it myself. Turbos are not as brutal as a roots supercharger. There was a time in the mid 90's when Kryptonite cranks were not available, or at least as fast as I needed one, so I ran a Lunati with good results.900hp 7lbs?? I guess what I’m asking is ...in 1994 did scat make a high quality american made forged crank? Seems weird that all of the other parts are matched with a scat
I ran one in a 383 in my Chevelle. Not one issueSo I picked up a boat with a 557ci twin turbo. Engine built in 1994 with excellent parts according to the build sheet...EXCEPT it lists a SCAT pro comp series 4.25” crank. Any chance SCAT was a good crank back then???
I would say at 7 psi you will be alright, and I would probably run it myself. Turbos are not as brutal as a roots supercharger. There was a time in the mid 90's when Kryptonite cranks were not available, or at least as fast as I needed one, so I ran a Lunati with good results.
Lunati cranks about that time were made from forgings at Cola (Crankshafts of LA) in Rancho Dominguez . I was one of the crank grinders and also did alot of the knife edging. One of the funnest workplaces ever !
Sonny Bryant makes a great product. The ONLY cranks to run for big power View attachment 1069338
Was thinking the same thing!The mallory in that thing costs more than the crank. DAMN..
But for just a blip in time=Marine is like going up the grapevine WOT all day!Hey guys, my 2 cents is running a TT motor in a boat isn’t the same as running the very same engine in a car at the strip. The stress on the crank leaving the line with a tight suspension and a pair of slicks is higher than possible in a marine application.
Full disclosure- I’m not an engine builder but I did stay at a Holiday Inn express once or twice
I have a Cola crank that I ran in my turbo engine. Plan on using it in the blown engine I plan to build.Lunati cranks about that time were made from forgings at Cola (Crankshafts of LA) in Rancho Dominguez . I was one of the crank grinders and also did alot of the knife edging. One of the funnest workplaces ever !
Sonny Bryant makes a great product. The ONLY cranks to run for big power View attachment 1069338
Hey guys, my 2 cents is running a TT motor in a boat isn’t the same as running the very same engine in a car at the strip. The stress on the crank leaving the line with a tight suspension and a pair of slicks is higher than possible in a marine application.
Full disclosure- I’m not an engine builder but I did stay at a Holiday Inn express once or twice
Yes I have heard that. I probably shouldn’t argue with the experts but I have a hard time equating the stress on a crank of launching a 3000# car off the line to a prop that has an inherent amount of slip. I totally agree that there are few applications where you can run an engine as hard and long as marine.Marine application is way harder, especially in something where the prop bites.
Not to mention you cant run a drag car at wot for several miles.
Yes I have heard that. I probably shouldn’t argue with the experts but I have a hard time equating the stress on a crank of launching a 3000# car off the line to a prop that has an inherent amount of slip. I totally agree that there are few applications where you can run an engine as hard and long as marine.
around 400Not to jack the thread but I have a chevy forged steel crank p/ n 3967416 that if checks out good with a machine shop would be worth what dollar wise?