Scat or Eagle?
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I was told by a number of different machinists that Scat and Eagle crankshafts and rods were actually produced by the same foundry, on the same equipment. The only difference is where the components get the FINAL machining process done at. This is what I have been told and to some degree, believe. If you visually compare most of the components, they are identical. Just food for thought...
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If it was down to Scat or Eagle, Scat crankshaft jounrals we find are more true and round, Eagle we find more with tapered and/or out of round journals.
Compstar is good on quality control, they have made slight changes to the crankshaft, just keeps getting better, and they have a keyway. Which belive it or not i've seen a few LS motors that spin the balancer, no blower, one was turbo car other N/A. I'd like to have a balancer keyway whenever possible.
Compstar is good on quality control, they have made slight changes to the crankshaft, just keeps getting better, and they have a keyway. Which belive it or not i've seen a few LS motors that spin the balancer, no blower, one was turbo car other N/A. I'd like to have a balancer keyway whenever possible.
Thread Starter
11 Second Club
Joined: Mar 2008
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From: New Westminster, B.C., Canada
If it was down to Scat or Eagle, Scat crankshaft jounrals we find are more true and round, Eagle we find more with tapered and/or out of round journals.
Compstar is good on quality control, they have made slight changes to the crankshaft, just keeps getting better, and they have a keyway. Which belive it or not i've seen a few LS motors that spin the balancer, no blower, one was turbo car other N/A. I'd like to have a balancer keyway whenever possible.
Compstar is good on quality control, they have made slight changes to the crankshaft, just keeps getting better, and they have a keyway. Which belive it or not i've seen a few LS motors that spin the balancer, no blower, one was turbo car other N/A. I'd like to have a balancer keyway whenever possible.
The final machining process is what sets the crankshafts apart. That seems to also determine the final pricing of the piece as well.
Who makes a crankshaft with a keyway?
FormerVendor
Joined: Nov 2001
Posts: 3,065
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From: Houston, Tx.
I agree with Shawn and Fraser. Compstar is nicest and Eagle probably craziest on cranks.
We used Eagle cranks for years and still do but we often have some that we have to trim the crank to get them straight.
Eagle rods we have no issue with but the cranks are not always the greatest especially as compared to SCAT and Callies and Lunati.
SCAT also has a key in the front as well but some have different flywheel bolts.
We used Eagle cranks for years and still do but we often have some that we have to trim the crank to get them straight.
Eagle rods we have no issue with but the cranks are not always the greatest especially as compared to SCAT and Callies and Lunati.
SCAT also has a key in the front as well but some have different flywheel bolts.
Thread Starter
11 Second Club
Joined: Mar 2008
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From: New Westminster, B.C., Canada
I am going with the SCAT 4" stroker crank, and SCAT H BEAM rods with ARP2000 rod bolts. I chose -30cc Race Tech Forged pistons, (4" bore).
Last edited by Marktainium; Jul 1, 2010 at 02:37 PM.
As stated above, the Scat crank journals are held to a tighter tolerance and more round...Eagle cranks have been known to be out of round and need a .01" cut to true them up. Can't say I've had issues with the rods. Any of the piston companies can make you a quality piston. Each company has pro's/cons. For the LS crowd I like K1, Callies Compstar or Dragonslayer cranks, and their respective rods. Scat offers the SBC rods in place of a true LS rod. KY-Turbo is a dealer for the K1, Callies, and Scat product lines as well as JE, Diamond, Wiseco, and Ross Pistons. Good luck on your build