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Re: cracked block again?
[Re: jimmysarrow]
#1145162
12/27/11 05:35 PM
12/27/11 05:35 PM
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Joined: Aug 2003
Posts: 43,293
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,293
Bend,OR USA
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Quote:
Cracked first 440 block with 120 passes, replaced with 440 block this time with a tall fill of hardblok & aluminum main caps and with a total of 44 passes i believe i have cracked this block. Any ideas where this block may have cracked since it has hardblok? I have not torn the motor down yet.
I'll bet it is in the same place as before, between 1&3  That seems to be the weak spot when it comes to main web cracks, at least the ones I have seen in 440 blocks  I don't think filling the block helps stop that   Mike is correct, I believe, in what makes them crack, detonation look very closely for cap walk and rod bearings that fall out of the rods If the rod bearing crush is gone that to me is a good sign to think of detonation I had one block that had the crack in the same place with aluminum rods and no fill, it did have 14.7 to 1 compression also The motor was broken elsewhere when I bought it for parts so I don't know what fuel or tune up it had in it when it was broken
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: cracked block again?
[Re: Cab_Burge]
#1145165
12/27/11 06:29 PM
12/27/11 06:29 PM
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Joined: Nov 2007
Posts: 1,600
Alberta Canada
StrokerAspen
top fuel
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top fuel
Joined: Nov 2007
Posts: 1,600
Alberta Canada
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Quote:
Buy a good block and don't look back 
 but if is not in the cards, ditch the 440 and go back to the 400 block and put a BCR girdle in it.
-Kenny
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Re: cracked block again?
[Re: jimmysarrow]
#1145170
12/27/11 09:16 PM
12/27/11 09:16 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
About 750 hp. 500 Ci w/ 13.1.comp., 2575 tube chassis car ,powerglide shift@ 6800 , 1/8th et 5.56 on E85. Also , Cab is correct the first block did crack in the main and up 1&3. Wish i would have stayed with a 400 block I had a 470CI that ran 5.60 and put about 500 pases before it broke an alum. main cap.Trying to decide to go back to 400 block or buy an aftermarket 440 block. I just can not believe I broke 2 blocks so quick.I have friends who have a lot more HP then me and they get 300 - 400 passes before they refresh and very seldom crack a stock block.
What do you use for fuel... you must be detonating
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Re: cracked block again?
[Re: jimmysarrow]
#1145171
12/27/11 09:17 PM
12/27/11 09:17 PM
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Joined: Jun 2009
Posts: 1,186
OHIO
THE GLASS MAN
super stock
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super stock
Joined: Jun 2009
Posts: 1,186
OHIO
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Quote:
First block was up [Email]1@3[/Email] cylinder, have not torn down this block yet.
Maybe you are running stock style motor mounts and flexing the block between 1&3? Motor plate or a good strut bar would take care of the problem.
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Re: cracked block again?
[Re: MR_P_BODY]
#1145172
12/27/11 09:48 PM
12/27/11 09:48 PM
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Joined: Jul 2005
Posts: 1,162
s e mich
ro23car
super stock
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super stock
Joined: Jul 2005
Posts: 1,162
s e mich
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Quote:
Quote:
About 750 hp. 500 Ci w/ 13.1.comp., 2575 tube chassis car ,powerglide shift@ 6800 , 1/8th et 5.56 on E85. Also , Cab is correct the first block did crack in the main and up 1&3. Wish i would have stayed with a 400 block I had a 470CI that ran 5.60 and put about 500 pases before it broke an alum. main cap.Trying to decide to go back to 400 block or buy an aftermarket 440 block. I just can not believe I broke 2 blocks so quick.I have friends who have a lot more HP then me and they get 300 - 400 passes before they refresh and very seldom crack a stock block.
What do you use for fuel... you must be detonatingif the block is craking like that its probably spreading the block.
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Re: cracked block again?
[Re: ro23car]
#1145173
12/27/11 09:55 PM
12/27/11 09:55 PM
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Joined: Dec 2006
Posts: 3,667
Arizona
Chris'sBarracuda
master
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master
Joined: Dec 2006
Posts: 3,667
Arizona
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Quote:
Quote:
Quote:
About 750 hp. 500 Ci w/ 13.1.comp., 2575 tube chassis car ,powerglide shift@ 6800 , 1/8th et 5.56 on E85. Also , Cab is correct the first block did crack in the main and up 1&3. Wish i would have stayed with a 400 block I had a 470CI that ran 5.60 and put about 500 pases before it broke an alum. main cap.Trying to decide to go back to 400 block or buy an aftermarket 440 block. I just can not believe I broke 2 blocks so quick.I have friends who have a lot more HP then me and they get 300 - 400 passes before they refresh and very seldom crack a stock block.
What do you use for fuel... you must be detonatingif the block is craking like that its probably spreading the block.
Chris.. 
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Re: cracked block again?
[Re: jimmysarrow]
#1145174
12/27/11 10:00 PM
12/27/11 10:00 PM
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Joined: Jan 2003
Posts: 16,931
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,931
NC
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Quote:
jimmysarrow wrote:
About 750 hp. 500 Ci w/ 13.1.comp., 2575 tube chassis car ,powerglide shift@ 6800 , 1/8th et 5.56 on E85.
The E85 is pretty good about octane and detonation resistance, but a bad tune will ruin anything on any fuel.
I hate to see this. I just don't know if your cracks started in thin cylinders, or in the main webs. Like I said, the aluminum caps really help the main webs.
Maybe I am lucky. My 400 block with aluminum mains went over 600 passes before a full rebuild. I did several inspections over the years. But after some work, it it back in service and went another 177 last season at 3225 lbs.
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Re: cracked block again?
[Re: Chris'sBarracuda]
#1145175
12/27/11 10:21 PM
12/27/11 10:21 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Quote:
Quote:
Quote:
About 750 hp. 500 Ci w/ 13.1.comp., 2575 tube chassis car ,powerglide shift@ 6800 , 1/8th et 5.56 on E85. Also , Cab is correct the first block did crack in the main and up 1&3. Wish i would have stayed with a 400 block I had a 470CI that ran 5.60 and put about 500 pases before it broke an alum. main cap.Trying to decide to go back to 400 block or buy an aftermarket 440 block. I just can not believe I broke 2 blocks so quick.I have friends who have a lot more HP then me and they get 300 - 400 passes before they refresh and very seldom crack a stock block.
What do you use for fuel... you must be detonatingif the block is craking like that its probably spreading the block.
Chris..
He THINKS he is running E-85
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Re: cracked block again?
[Re: jimmysarrow]
#1145177
12/28/11 01:44 AM
12/28/11 01:44 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
I check my fuel for e85 using a quickfuel tester and it is usually at 87.Carb is a 1050 dominator and car would run the number back to back and carb was worked by a guy in the midwest who only does e85 carbs.I dont think it is a detonation problem but at this point I am just looking for anything . Really stinks to go through 2 blocks in 2 years.I am thinking of buying a world or koleno, my pistons, rods and crank dont have but about 180 passes total but thinking of turning crank and use the rods and buy new pistons and go back to 400 block. Just trying to make up my mind on which way to go.
Well since you know its E-85... but IMO its still
detonation ... unless your engine is out of balance BAD
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