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Re: What caused this damage
[Re: Cab_Burge]
#1336149
11/18/12 11:51 PM
11/18/12 11:51 PM
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Joined: Oct 2012
Posts: 1,106
Northeast
VincentVega
super stock
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super stock
Joined: Oct 2012
Posts: 1,106
Northeast
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Sorry if this is a bit off topic, but how often has anyone seen a 440 with a turbo? Blowers are nice, but a mild big block with a mild turbo would be a sleeper unlike anything. I've never even seen one on youtube, seems like no one even considers it.
Looking for 1975 through 1978 B body 4 door sedan sheet metal or parts cars - monaco, fury, coronet. Please let me know
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Re: What caused this damage
[Re: VincentVega]
#1336150
11/19/12 04:16 AM
11/19/12 04:16 AM
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Joined: Jan 2003
Posts: 2,932
Finalnd, Perkele
jyrki
master
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master
Joined: Jan 2003
Posts: 2,932
Finalnd, Perkele
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We have two of them in our garage. This is the engine bay of a 1970 Chrysler New Yorker 4 D sedan  Iseriously doubpt that the reason for the breakage is the pistons or rods themselves. Shouldn't be at that power level. We have a 440 with a 6-71 that makes about the same power and it has been together for almost 30 years, but will be gone through this winter. We also broke a 400 with H-profile rods and a supercharger last summer, a rod broke. But that was because a cylinder wall cracked, water got on the piston and since it doesn't compress too well something has to give up... Although propably not the reason in this case, I would check the cylinder walls of that cylinder carefully just to be sure. Detonation might be one reason, but I would assume you should rather see it as gap walk first. And of course the pistons you have are tanks, but unless you wind it very high, I think it shouldn't be a major problem.
Plynouth VIP '67 TT IC EFI
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Re: What caused this damage
[Re: jyrki]
#1336151
11/19/12 11:20 AM
11/19/12 11:20 AM
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Joined: Jan 2005
Posts: 1,260
Las Vegas NV
moparmanjames
pro stock
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pro stock
Joined: Jan 2005
Posts: 1,260
Las Vegas NV
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Quote:
We have two of them in our garage. This is the engine bay of a 1970 Chrysler New Yorker 4 D sedan
Iseriously doubpt that the reason for the breakage is the pistons or rods themselves. Shouldn't be at that power level. We have a 440 with a 6-71 that makes about the same power and it has been together for almost 30 years, but will be gone through this winter. We also broke a 400 with H-profile rods and a supercharger last summer, a rod broke. But that was because a cylinder wall cracked, water got on the piston and since it doesn't compress too well something has to give up... Although propably not the reason in this case, I would check the cylinder walls of that cylinder carefully just to be sure. Detonation might be one reason, but I would assume you should rather see it as gap walk first. And of course the pistons you have are tanks, but unless you wind it very high, I think it shouldn't be a major problem.
Yeah I'm thinking he may have spun the engine too high coupled with too much timing.
I see folks with prochargers that have basically stock bottom ends pushing more boost than that and living.
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Re: What caused this damage
[Re: Petri.]
#1336152
11/19/12 11:27 AM
11/19/12 11:27 AM
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Joined: Jan 2005
Posts: 1,260
Las Vegas NV
moparmanjames
pro stock
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pro stock
Joined: Jan 2005
Posts: 1,260
Las Vegas NV
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Quote:
The crank was checked and grinded 0.010 , they did not use any balancer on the crank, why i dont know but i will get one, what do you think about these parts
1. 440 -73 motorhome block that i have
2. Crank , will any of these brands do the job, eagle scat or k1
3. Rods same brand with 0.99 pins
4. Pistons 8.5:1 ross je venolia or wiseco
5. Aluminium or steel main caps and does they need to be cross bolted, will aluminium caps make the block last longer and what is best for street driving.
6. Does it need a girdle
1. Use Hardblock halfway up the cylinder walls to strengthen it.
2. A stock forged steel crank will be fine, just check it first.
3. Good aftermarket rods
4. Yes
5. Aluminum main caps with stud girdle.
6. Yes
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Re: What caused this damage
[Re: BigBlockMopar]
#1336154
11/19/12 12:43 PM
11/19/12 12:43 PM
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Joined: Jan 2003
Posts: 7,490
Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,490
Minnesota
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I think we need a better picture of the bearing. On my computer screen, it doesen't really look like copper showing, it looks like the brown cardboard reflecting off a shiney aluminum bearing. 
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: What caused this damage
[Re: Hemi_Joel]
#1336156
11/19/12 06:43 PM
11/19/12 06:43 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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In my humble opinion, I'd start with detonation as the cause.
The blower effectively makes the engine much bigger so high rpm are not required.
Now I am on record as saying the stock 440 pistons are stones or clubs and the rods would be MUCH BETTER with 7/16" rod bolts, but this doesn't appear to me to be rpm related. So that leaves detonation which is lurking around every blower setup waiting to bite you.
ANY 440 block needs to have cylinder walls sonic checked before you invest a bunch of Euros in it.
I'd suggest using a BCR main cap/girdle setup to stiffen the bottom end. Also, a half fill of the block will stiffen the cylinder walls.
I'd email Dan at Performance Only to get his take on cranks, off the top of my head I'd use either K1 or Scat over Eagle. If you really want to build strong, Crower is the name I'd drop. But it will cost you twice as much as a K1 or Scat.
Pistons need to be strong forgings designed for blower use, get with a piston manufacturer directly after getting some input on who. Also, wristpins need to be sturdy.
I think you will be able to run 700 - 800 hp with ease using all these good parts. But, if you have already spent $5000 on moving parts, does it make sense to use a stock block? I'd seriously suggest getting an aftermarket block. Then you'll be bulletproof.
R. (really good at spending other people's money)
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Re: What caused this damage
[Re: jyrki]
#1336159
11/19/12 07:56 PM
11/19/12 07:56 PM
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Joined: Oct 2012
Posts: 1,106
Northeast
VincentVega
super stock
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super stock
Joined: Oct 2012
Posts: 1,106
Northeast
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Quote:
We have two of them in our garage. This is the engine bay of a 1970 Chrysler New Yorker 4 D sedan
Iseriously doubpt that the reason for the breakage is the pistons or rods themselves. Shouldn't be at that power level. We have a 440 with a 6-71 that makes about the same power and it has been together for almost 30 years, but will be gone through this winter. We also broke a 400 with H-profile rods and a supercharger last summer, a rod broke. But that was because a cylinder wall cracked, water got on the piston and since it doesn't compress too well something has to give up... Although propably not the reason in this case, I would check the cylinder walls of that cylinder carefully just to be sure. Detonation might be one reason, but I would assume you should rather see it as gap walk first. And of course the pistons you have are tanks, but unless you wind it very high, I think it shouldn't be a major problem.
That's awesome. Please tell me there is a page on here, or a webpage somewhere about this car?
Looking for 1975 through 1978 B body 4 door sedan sheet metal or parts cars - monaco, fury, coronet. Please let me know
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I checked the ring gap at the broken piston first and second ring was about 0.028
