Re: Another Eagle cast crank broken (408 stroker)
[Re: BobR]
#634678
03/09/10 10:40 PM
03/09/10 10:40 PM
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Joined: Jul 2008
Posts: 30,632 Florida STAYcation
IcorkSOAK
Financed his waterbed
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Financed his waterbed
Joined: Jul 2008
Posts: 30,632
Florida STAYcation
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Quote:
Cast cranks are for .......
.... cars with TORQUE CONVERTERS !
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Re: Another Eagle cast crank broken (408 stroker)
[Re: IcorkSOAK]
#634679
03/10/10 12:15 AM
03/10/10 12:15 AM
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Joined: Nov 2009
Posts: 3,082 St. Paul , Mn.
tubtar
master
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master
Joined: Nov 2009
Posts: 3,082
St. Paul , Mn.
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Quote:
Quote:
Cast cranks are for .......
.... cars with TORQUE CONVERTERS !
And 48 inch mower decks.
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Re: Another Eagle cast crank broken (408 stroker)
[Re: tubtar]
#634681
03/10/10 11:08 AM
03/10/10 11:08 AM
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Joined: Feb 2004
Posts: 6,257 acworth / N. georgia - south e...
cheapstreetdustr
master
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master
Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
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something very miniscule to consider.. but heat cycles makes a crank stonger. so to a tiney degree..a used crank main gain a tiny bit more strength from it having been heat cycled. i aggree that crank was destined to fail. when its mass produced youll have that percentage airbubbles,metalergy,,ect...its gonna happen in a cast crank..to some degree.. fwiw.. cheapst.
365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured [image][/image]
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Re: Another Eagle cast crank broken (408 stroker)
[Re: LAR_414]
#634684
03/10/10 11:55 AM
03/10/10 11:55 AM
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Joined: Feb 2004
Posts: 4,501 Gainesville,FL
goldmember
master
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master
Joined: Feb 2004
Posts: 4,501
Gainesville,FL
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Quote:
Just throwing this out there,....I've got an estimated 500-525 hp with my 4" CAST crank (mopar performance) with a pretty heavy bob wieght. Car is heavy (3350lbs). Has been together for about 7 years now. Runs 11.0's with automatic, and I just put a stick in it last year (still tuning), but hoping to run low 11's with the stick.
One time, I spun a rod bearing. Had the crank cut and they said that it was slightly bent, very slightly. They tried to straighten it, and the machine shop said that they couldn't believe how STRONG this crank was. They said it was about as strong as some (other makes) forged cranks they has seen.
Never had a problem with the crank! (340 mains, too)
I have seen the MP cast crank take some abuse. Mid 10's most weekends for 7 plus years(did break last year in dramatic fashion,LOL). The MP and the Eagle are far from similar.
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Re: Another Eagle cast crank broken (408 stroker)
[Re: AndyF]
#634686
03/10/10 12:33 PM
03/10/10 12:33 PM
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Joined: Jan 2004
Posts: 143 Buenos Aires, ARGENTINA
madmax2
OP
member
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OP
member
Joined: Jan 2004
Posts: 143
Buenos Aires, ARGENTINA
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Quote:
These days there is only a small difference in total engine cost to go forged. I suppose things were different years ago. At one time the cast stroker crank was the only thing available to people on a budget but that is no longer the case.
The crankshaft was purchased in 2007, forged crankshafts were much more expensive than today. and we thought we would hold less than 500 HP without problems.
'70 Dodge GTX sb 418ci (Early A-body), Lunati Solid cam 270°/243°@.050/.548", Edelbrock Heads, Weiand X-CELerator, Holley Terminator EFI, Tremec 6 sp manual, 3.90:1, TTI Headers.
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Re: Another Eagle cast crank broken (408 stroker)
[Re: madmax2]
#634687
03/10/10 12:44 PM
03/10/10 12:44 PM
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Joined: Aug 2005
Posts: 637 Sao Paulo, Brazil
dart_73_br
mopar
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mopar
Joined: Aug 2005
Posts: 637
Sao Paulo, Brazil
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Quote:
and we thought we would hold less than 500 HP without problems.
Yeah, this cranks are supposed to handle 500hp with no problems...
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Re: Another Eagle cast crank broken (408 stroker)
[Re: dart_73_br]
#634688
03/10/10 05:11 PM
03/10/10 05:11 PM
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Joined: Feb 2004
Posts: 6,257 acworth / N. georgia - south e...
cheapstreetdustr
master
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master
Joined: Feb 2004
Posts: 6,257
acworth / N. georgia - south e...
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just like the saftey on your guns..
"Its a mechanical device made by man,,prone to failure"
still remember that 26yrs ago from the test... good for something...
cheapst
365" Iron J heads,,3480lbs best 1.39 60ft on SS springs.10.54,124 mph ...6.67 1/8th et.average 60fts 1.46 w/ small cam &.063 no2 pill tagged & insured [image][/image]
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Re: Another Eagle cast crank broken (408 stroker)
[Re: dart_73_br]
#634689
03/10/10 05:36 PM
03/10/10 05:36 PM
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Joined: Jan 2007
Posts: 3,695 nc
emarine01
master
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master
Joined: Jan 2007
Posts: 3,695
nc
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Quote:
Quote:
and we thought we would hold less than 500 HP without problems.
Yeah, this cranks are supposed to handle 500hp with no problems...
There are lots of reasons parts fail, The easy thing to do is blame the part After 20 or so years rebuilding and repairing diesels I have seen more parts fail from improper assembly or the wrong part used for the application than defective parts,Now I am not saying that cheep eagle cranks are good < looked like a pourous casting> from pics, but I do know a chevy builder that uses 4 inch arm cast cranks in 650 hp range with out failure and I think they are eagle made
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Re: Another Eagle cast crank broken (408 stroker)
[Re: emarine01]
#634690
03/10/10 05:40 PM
03/10/10 05:40 PM
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Joined: Feb 2004
Posts: 4,501 Gainesville,FL
goldmember
master
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master
Joined: Feb 2004
Posts: 4,501
Gainesville,FL
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Quote:
Quote:
Quote:
and we thought we would hold less than 500 HP without problems.
Yeah, this cranks are supposed to handle 500hp with no problems...
There are lots of reasons parts fail, The easy thing to do is blame the part After 20 or so years rebuilding and repairing diesels I have seen more parts fail from improper assembly or the wrong part used for the application than defective parts,Now I am not saying that cheep eagle cranks are good < looked like a pourous casting> from pics, but I do know a chevy builder that uses 4 inch arm cast cranks in 650 hp range with out failure and I think they are eagle made
The Eagle cranks for Chevys do seem to hold up better than the pieces they make for the Mopar guys.
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Re: Another Eagle cast crank broken (408 stroker)
[Re: MR_P_BODY]
#634692
03/10/10 09:52 PM
03/10/10 09:52 PM
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Joined: Dec 2006
Posts: 214 Colo Springs, CO
DconD100
enthusiast
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enthusiast
Joined: Dec 2006
Posts: 214
Colo Springs, CO
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Do the engines spin the opposite direction down there in Argentina? My eagle 4 inch arm is holding up at about 450 observed hp. It internally balanced with the I-beam rods, and I have an ATI balancer...sure hope it keeps on trucking! I only have about 5000 miles, and about 50 quartemile passes on it.
Pump Gas Small Blocks Rock!
11.53 @ 116mph E85 408 at 8500 ft da,
3605 pound truck, 3.91s, street driven
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Re: Another Eagle cast crank broken (408 stroker)
[Re: dr.mopar]
#634694
08/26/11 01:15 PM
08/26/11 01:15 PM
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Joined: Feb 2007
Posts: 2,578 sweden
1Fast340
master
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master
Joined: Feb 2007
Posts: 2,578
sweden
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to the original poster: did you have any balancers breaking before this crank broke? asking since i have observed a crazy behavior from a friends cast eagle crank and im afriad his crank is about to do what yours already did, at about the same powerlevel.
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Re: Another Eagle cast crank broken (408 stroker)
[Re: madmax2]
#634696
08/27/11 02:26 AM
08/27/11 02:26 AM
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Joined: Feb 2004
Posts: 1,093 Long Beach, CA
Mike Swann
super stock
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super stock
Joined: Feb 2004
Posts: 1,093
Long Beach, CA
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Lack of nickel as an alloying agent in the Eagle casting, imo. You see cracking in a lot in sockets and wrenches(hand tools) as well. They will add a lot of carbon to get it strong, but without the nickel, no fatigue life or fracture toughness.
The price of nickel has skyrocketed over the years and has been disappearing in non quality controlled metals, like Eagle cranks.
Ask Eagle if you can see the assay report on the casting lot. Bwahahahahaha.
8.30's @3400 lbs
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