LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Another One Bits The Dust!!! With Pics

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Old May 22, 2013 | 05:46 PM
  #41  
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Damn, sorry to see that OP. How many miles were on it when it went?

I have a cast Scat in my 385. It was checked and balanced before assembly. 5 years later and still no problems or did I just jynx myself?
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Old May 22, 2013 | 06:46 PM
  #42  
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OLDER aftermarket cast cranks were not the problem newer stuff is and Sact is better than Eagle.

Besides that does your 385 actually make any power?
A friend has a cast Scat in a stroker(third gen with LT1 swap) from probably 7-8 years ago, last I heard it was going fine. Engine is a 383 with some TPIS crappily CNC'd AFRs and a big TPIS cam, ran about as well on ET streets as my old 190cc AI setup ran on street tires with the slicks and tools in the trunk. Point being, it doesn't make the power of a decent heads/cam car.
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Old May 22, 2013 | 09:54 PM
  #43  
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Originally Posted by 96capricemgr
OLDER aftermarket cast cranks were not the problem newer stuff is and Sact is better than Eagle.

Besides that does your 385 actually make any power?
A friend has a cast Scat in a stroker(third gen with LT1 swap) from probably 7-8 years ago, last I heard it was going fine. Engine is a 383 with some TPIS crappily CNC'd AFRs and a big TPIS cam, ran about as well on ET streets as my old 190cc AI setup ran on street tires with the slicks and tools in the trunk. Point being, it doesn't make the power of a decent heads/cam car.
I see, I just thought I'd comment since someone else posted pics of their busted Scat crank.

When it was tracked the car had, 3.42's, full weight car including an audio system (2 subs, 2 amps etc), street tires, 2800 stall...ran 12.2's @115+ w/ 2.0 60 ft times.
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Old Aug 15, 2013 | 11:34 AM
  #44  
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So here are some more pics. The crank had maybe 3k miles on it. Think the rod maybe a little bent too but not sure. The good news is the heads are fine.






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Old Aug 15, 2013 | 12:00 PM
  #45  
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Cast & Eagle are two words you will never find on anything of mine. Just asking for it.
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Old Aug 15, 2013 | 12:03 PM
  #46  
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Is the Eagle forged stuff any good?
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Old Aug 15, 2013 | 12:16 PM
  #47  
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Originally Posted by SS RRR
The Eagle's products may be produced by "slant eye Eagle workers" as you say, but the QC is handled here in the US.
Actually that is not completely true. All forged units are QC'd here the cast units are done from beginning to end in CHINA including QC.
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Old Aug 15, 2013 | 12:50 PM
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Originally Posted by NewOrleansLT1
Is the Eagle forged stuff any good?
I think it's junk. Too often their rods need re-sized right out of the box, crank journals not dead nuts on size, guys just taking this stuff out of the box (especially checking bearing clearances with plastigauge) don't know the difference. Just wonder what happened when they lose a bearing, etc. I know of two shops that now refuse to balance Eagle cranks, telling me they take too long due to the counterweights being wrong. Nobody buying that kind of stuff can't afford, or don't want to pay for, the difference for the balancing. I have used Scat for years, as have several shops I know, and have never seen any of this. Machine works has always been dead on. I would not use anybodies cast crank in anything.
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Old Aug 15, 2013 | 06:21 PM
  #49  
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So just got done tearing the short block down and #8 Cylinder has a crack in it. I'll try to wheel it out tomorrow and take a pic. I think this block maybe junk. If so the wife is gonna have one hell of an expensive planter for her plants.

Hey Ed Got any spare parts lol. J/k I doubt I'd be able to afford anything right now.
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Old Aug 15, 2013 | 06:31 PM
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Man, that's tough. All I have left are a set of pistons and a couple of SR cams.
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Old Aug 16, 2013 | 01:04 AM
  #51  
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Originally Posted by Ed Wright
I think it's junk. Too often their rods need re-sized right out of the box, crank journals not dead nuts on size, guys just taking this stuff out of the box (especially checking bearing clearances with plastigauge) don't know the difference. Just wonder what happened when they lose a bearing, etc. I know of two shops that now refuse to balance Eagle cranks, telling me they take too long due to the counterweights being wrong. Nobody buying that kind of stuff can't afford, or don't want to pay for, the difference for the balancing. I have used Scat for years, as have several shops I know, and have never seen any of this. Machine works has always been dead on. I would not use anybodies cast crank in anything.
The last two Eagle cranks I had were hard to get balanced. The finish work their cranks is very subpar. In the end they will work. You might save some money on the front end, but the extra machine work might cost you more.
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Old Aug 16, 2013 | 07:41 AM
  #52  
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My Eagle forged crank was no problem to balance. Only issues I have is the centering flange is oversized so flywheels need to be cut a few thousandths and the pilot hole is oversized so I have to "custom" fit a bushing. No great shakes. No metal needed to be added and it's survived 7000+ rpm for the last several years.
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Old Aug 16, 2013 | 09:07 AM
  #53  
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Originally Posted by SS RRR
My Eagle forged crank was no problem to balance. Only issues I have is the centering flange is oversized so flywheels need to be cut a few thousandths and the pilot hole is oversized so I have to "custom" fit a bushing. No great shakes. No metal needed to be added and it's survived 7000+ rpm for the last several years.
That is typical Eagle. Sloppy machine work. Your bob weight is probably heavy. If you have their rods too, I hope you had the big ends put on the bore gauge at the machine shop. One local guy was showing me a set of those things, four of the eight were half a thousand out of round, all eight were below the low side spec. By the time the kid paid to have his rods re-sized he could have bought Scats. There are some serious engine shops using Scat forged cranks and their rods. That is a really dumb place to try to save money. It might live, it might not. When engine shops quit using Eagle stuff, that should tell you something. I have a Bullet crank (Bullet cam co.) in mine right now, last five engines have all been Scat. Well, one stock LT1 crank. They ain't bad.
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Old Aug 16, 2013 | 09:36 AM
  #54  
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They wouldn't use the Eagle rods I had and told me to get Compstars, so I complied. Engine is silky smooth throughout the entire RPM band. I have total faith the machine shop I used built the engine correctly. Again, it has over 15K miles on it and plenty of 7200rpm jaunts.
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Old Aug 16, 2013 | 11:52 AM
  #55  
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a little bit of weld, youll be alright ... lol
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Old Aug 16, 2013 | 02:21 PM
  #56  
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Originally Posted by SS RRR
My Eagle forged crank was no problem to balance. Only issues I have is the centering flange is oversized so flywheels need to be cut a few thousandths and the pilot hole is oversized so I have to "custom" fit a bushing. No great shakes. No metal needed to be added and it's survived 7000+ rpm for the last several years.
reports on some aftermarket cranks cast or forged on pilot bearing hole being .00x to big and lip for FW also.

green locktite on pilot bearing or use brass "shim" material around the pilot bearing. I did this on a motor before. .005" shim stock

on FW I have had stock OEM fit fine and exploding wallet billet aftermarket ones slightly tight on the hub hole. I choose not to draw on FW that are tight with the bolts as metal will distort. took emery cloth on the inside of that FW and it took care of that problem. I was surprised on how little effort and time it took to open the FW hole up some using emery cloth wheel on a dremal.

IMHO I would not run a cast crank unless it was a stock OEM one. stroker crank, get forged.
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Old Aug 17, 2013 | 08:52 AM
  #57  
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Yes, Eagle's answer was to give me the option of an oversized bushing or a knurled bearing. I asked for both and decided on the bushing. I have since used a kevlar bushing and resorted back to using bearings. The crank flange was out a few thousandths. If I ever need a new one I just take it back to the machine shop who built it and they know what to do. They have a book on me.
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Old Aug 19, 2013 | 10:41 AM
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Default Crack in Cylinder

Here are pics of the crack in #8 Cylinder



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Old Aug 20, 2013 | 09:57 AM
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Damn dude, don't see a cracked cylinder on these cars too often.
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Old Aug 20, 2013 | 07:27 PM
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Originally Posted by SS RRR
Yes, Eagle's answer was to give me the option of an oversized bushing or a knurled bearing. I asked for both and decided on the bushing. I have since used a kevlar bushing and resorted back to using bearings. The crank flange was out a few thousandths. If I ever need a new one I just take it back to the machine shop who built it and they know what to do. They have a book on me.
From what im told from everyone is that the only debatable component to come from eagle is their H-beam rods. Every other part is worse than stock internals
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