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Old 09-03-2007, 11:31 AM   #1 (permalink)
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SCAT vs Eagle 393 crankshafts

OK, here is an issue that has been beat to death. Since I am now much closer in building my 393 (with 351W rods), I am looking for some feedback on the above mentioned cranks. Their info is a bit loose and does not give a recommended max RPM or HP level (9000 series crank for the SCAT or the Eagle eqivalent). 7000 RPM is my utmost max RPM. Any input from some real world experiences??? Thanks...
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Old 09-05-2007, 04:47 PM   #2 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

SCAT HANDS DOWN!!!!!!!!!!!!!!!! Run a 9,000 series in a circle track, actually its the FASTEST one on the track right now, sure its a chevy and its a "secret" unordinary combo but the crank takes 6,000 through turns to 6,800 rpm on straights constant for 10 minutes at a time with NO issues. Got another one in a 408 cleveland, 7,100 shift point, again no issues. Eagle stuff i've never used but ever notice how you always see reground brand new eagle cranks for sale??? Check out CNC-MOTORSPORTS they got tens of them on there on clearance at a time cut undersize on rods or mains, or both. My scat stuff at the worst needs a .001 under on one side of the bearing to tighten them up where i want them, but they'd probably be fine as is.
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Old 09-05-2007, 07:10 PM   #3 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

I only sell SCAT cranks and rods, and I have NEVER had an issue with qualitly control. I use the SCAT cast 9000 cranks in every engine up to 675 HP, and 7500 RPM. One thing here though, why are you making a 393 size engine ?? A 408 will make MORE power and the cost is EXACTLY the same. I NEVER build 393 stuff. Think about it.
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Old 09-05-2007, 08:13 PM   #4 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

yep,scat all the way and Joe is way right 408 is the way to go, a 408 make more power and low end, you would think a 393 would rev more but the 408 does. The difference between a 393 kit and a 408 kit (of the same quality) is little to none also you have better compression ratio choices with a 408.
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Old 09-05-2007, 09:03 PM   #5 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

Why build a 408 when a 418 makes more power. Why build a 418 when a 427 makes more power? Why build a 221 when a 557 makes more power?
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Old 09-10-2007, 04:02 PM   #6 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

i wont argue that the scat crank insnt better , but i have a 3.850 eagle crank and it is a good piece im making more than 650 hp with nitrous , i dont think anyone will argue that the stock rods will fail before that crank will , and i beive that the stock block will fail before the crank will also,

if the prices are comparable go with the scat but if you can get the eagle cheaper dont feel bad about it ,

one more thing to consider , i have heard the scat cranks are easier to balance so it may save you a few bucks there.

Last edited by skyy; 09-10-2007 at 04:05 PM.
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Old 09-10-2007, 04:08 PM   #7 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

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Originally Posted by leethal72 View Post
Why build a 408 when a 418 makes more power. Why build a 418 when a 427 makes more power? Why build a 221 when a 557 makes more power?

becouse i think it has to do with that money stuff
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Old 09-18-2007, 12:58 PM   #8 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

OK, I can understand the logic for "building it bigger', but like most, BUDGET, BUDGET, BUDGET. I already have everything else including a set of Eagle H-beam rods that are stock length for a 351W and from what I understand, there is little to no block modification as compared to a 408. The only things I don't have is the pistons and crank. If I was paying someone to do it, I'd go 418+.
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Old 09-18-2007, 03:14 PM   #9 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

i also have eagle stuff never had a problem. not saying scat is junk but i think they are equal. i know guys going in the 8's with both. seems most east coast guys run eagle and west coast scat.
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Old 09-18-2007, 05:57 PM   #10 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

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Originally Posted by k718cougar View Post
OK, I can understand the logic for "building it bigger', but like most, BUDGET, BUDGET, BUDGET. I already have everything else including a set of Eagle H-beam rods that are stock length for a 351W and from what I understand, there is little to no block modification as compared to a 408. The only things I don't have is the pistons and crank. If I was paying someone to do it, I'd go 418+.
The amount of block modification depends more on the exact componants used than the size of the engine(to a point)..My 408 required almost no modification at all..It required a little grinding at the oil pump mount(which is standard for all 351 strokers I believe) and I had to grind a little off of my HV oil pump...Thats it!..No clearancing of the cylinder wall or the oil pan rail...The key is the connecting rods..Mine were the Premium Scat I beams with Capscrew bolts which gives it a nice round profile on the bottom..The length was 6.2 so no problem with piston skirt to crank clearance either.
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Old 09-19-2007, 08:49 AM   #11 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

I've run both sucessfully, but the SCAT stuff has better quality control, better machine work and Tighter tolerances. IMO.

For the few extra $$ go with the SCAT stuff, sometimes the eagle stuff is more difficult to balance, needs some attention to dimensions, Ect.
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Old 09-20-2007, 06:45 PM   #12 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

what kind of rods do you have ? unless you already have really good rods you can probly buy a kit with great compononts cheaper than buying good compononts seperate. try adperformance, they have good prices
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Old 09-21-2007, 09:44 PM   #13 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

I already have a set of Eagle H-beam rods that's why I'd like to save money and not buy something else to replace what I already have.
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Old 09-22-2007, 11:47 AM   #14 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

becouse buying a kit is like getting the value meal at mcdonalds its like buying everything els and gettind the pisons for free .

however if you have good rods , and it sounds like you do your probly better of buying the rest of the components, if you had I beams or stockers i would say scrap them and buy a kit , thats why i asked what kind of rods you have
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Old 09-24-2007, 07:18 PM   #15 (permalink)
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Re: SCAT vs Eagle 393 crankshafts

I have run my Hawkins crank, broke a couple of pistons and bent a rod. Crank keeps on turning.
If i build anothe stroker i will go 408 or 418.
The stock TRW pistons even though forged are not up to the task. In my opinion.
The 408's seem to make more power and at about the same price.
I only went 393 because i had a set of stock bore 302 TRW's and a good 351w stock bore block and rods.
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