SCAT crank
03-25-2004, 09:25 PM
#2
Registered User
Join Date: May 2003
Posts: 2,275
I have a Scat 4340 full weight. Almost all high quality manufacturers produce cranks of varying weights. The lighter you get, the higher the price. I suggest if you are buying components for the build yourself, you get a prebalanced kit. It will save you a lot of time, headaces and money.
Talk to several builders like Nu-tek, TPIS or Golen. The info they can give is free and will help a lot.
Talk to several builders like Nu-tek, TPIS or Golen. The info they can give is free and will help a lot.
03-25-2004, 09:26 PM
#3
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Join Date: Jul 1999
Location: Vancouver, WA
Posts: 629
I'm not quite sure I understand your question. Can you elaborate a bit?
Scat only makes a couple cranks with the one-piece seal, and I don't think they are much different in weight than the Eagle cranks.
Mike
Scat only makes a couple cranks with the one-piece seal, and I don't think they are much different in weight than the Eagle cranks.
Mike
03-25-2004, 09:37 PM
#4
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Join Date: Dec 1969
Location: Buffalo, New York
Posts: 10,745
All else being equal, the lighter the crank the more the strength is compromised. Obviously, you can get a crank that is light and also strong, but it will be very expensive. True "light weight" cranks should not be used in street motors. They just won't last long enough. Like with most mechanical parts, there is "no such thing as a free lunch" when it comes to cranks. There is a trade off between weight, strength, and price.
Rich Krause
Rich Krause
03-26-2004, 12:25 AM
#5
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Thread Starter
Join Date: Mar 2003
Posts: 35
sorry if i wasnt specific.. i guess my real question was, Im getting a 383 built ( Im not selecting all the parts, my engine builder is) and he suggested using a forged 4340 SCAT crank as part of the whole balanced, rotating assembly.. My question was whether or not this is a good, strong crank. I know a lot of people here are using Eagle cranks, and i wanted to make sure that this SCAT crank will be good. The rest of my motor will be using AFR 195cc LT4 heads, forged rods, dished pistons, a lunati cam, etc. I might possibly be adding a 175 shot down the road also. I just wanted to be reassured that the SCAT crank he suggested is a good piece, because i havent heard people talk about them much in the forums here... so what do u think?
03-26-2004, 07:05 AM
#8
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Thread Starter
Join Date: Mar 2003
Posts: 35
Ok guys GREAT!.. thats what i needed. You were a big help.. i cant wait to get this thing built.. Also, one other quick question... i should probably make this a new post, but the heads he said he would get were the AFR 195cc LT4 heads, street package.. which i think are 70% CNC ported.. flow about 260cfm on intake at .500.. i was wondering, how much of a difference would it make if i were to get the competition package, which is the same heads, 100% CNC ported and flowing about 280cfm on intake at .500 lift??? they are about $700 more... would it really make a difference or not? THANKS GUYS
03-26-2004, 09:39 AM
#9
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Join Date: Dec 1969
Location: Buffalo, New York
Posts: 10,745
It may make a big difference depending on the rest of your setup, especially the cam/valvetrain selected and in turn what rpm range you plan to operate the thing in. A good hand porting job is better than AFR's CNC machining though. But the operative word is "good". The CNC job is defnnitely better than a crappy hand port!
Rich Krause
Rich Krause
03-26-2004, 09:24 PM
#10
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Join Date: Oct 1998
Location: Southern CA
Posts: 705
Is the SCAT 4340 crank a non-twist design? The non-twist design is supposed to be stronger than a standard forged crank. The next step up is a billet crank. All scat and eagle cranks are forged overseas and then machined here in the USA. The material and forging process is inspected by US inspectors. We don't trust them that much!
Callies, Lunati, Cola, GM, and Trick Flow are forged and machined here, none of the work is subbed out overseas. These cranks cost a litte more of course.
Callies, Lunati, Cola, GM, and Trick Flow are forged and machined here, none of the work is subbed out overseas. These cranks cost a litte more of course.
05-20-2004, 06:47 PM
#11
Registered User
Join Date: Mar 2002
Location: San Juan PR
Posts: 3,083
Originally posted by 96ZUL8TR
recently i had a chance to compare my scat next to an eagle crank, funny thing they have the same forging marks, and the weight of both cranks was as close to identical as you could get.
recently i had a chance to compare my scat next to an eagle crank, funny thing they have the same forging marks, and the weight of both cranks was as close to identical as you could get.
