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Any 440 block or crank failures with boost?
#864052
11/26/10 03:37 PM
11/26/10 03:37 PM
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Joined: Jan 2003
Posts: 28,069
Irving, TX
feets
OP
Senior Management
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OP
Senior Management
Joined: Jan 2003
Posts: 28,069
Irving, TX
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I was wondering if anyone has experienced a stock block or crank failure on a blown/turbo 440?
I'm not talking about rods cutting loose and turning other parts into scrap metal. I know that happens.
Mine was always a mild setup and I never had any concerns with parts failures.
What about you guys making just a wee bit more power?
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Any 440 block or crank failures with boost?
[Re: feets]
#864053
11/26/10 08:02 PM
11/26/10 08:02 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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My experience indicates the weakest link in my combo(400 block, factory 440 crank stroked to 3.90, turned down mains)was the cylinder bores. I had no filler in the water jackets, and my bores always measured out to be barrel shaped. The one thing I would suggest to anyone building a more serious big block, would be to eliminate the R/L head feed from the cam bearing. The factory setup is bad enough, but it's compounded by cam manufacturers that decide to grove the cam to feed the heads full time(stealing oil pressure from #4 main and #6 rod.)
"use it 'till it breaks, replace as needed"
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Re: Any 440 block or crank failures with boost?
[Re: TRENDZ]
#864054
11/27/10 01:08 AM
11/27/10 01:08 AM
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Joined: Jan 2003
Posts: 28,069
Irving, TX
feets
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Senior Management
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OP
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Irving, TX
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I expected the walls to be more of a point of failure than the bottom end. Things are pretty beefy down there but detonation can break anything.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Any 440 block or crank failures with boost?
[Re: TRENDZ]
#864055
11/27/10 11:09 PM
11/27/10 11:09 PM
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Joined: Oct 2010
Posts: 66
Reno, NV
Wilde Racing
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Posts: 66
Reno, NV
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Quote:
The one thing I would suggest to anyone building a more serious big block, would be to eliminate the R/L head feed from the cam bearing. The factory setup is bad enough, but it's compounded by cam manufacturers that decide to grove the cam to feed the heads full time(stealing oil pressure from #4 main and #6 rod.)
Can you explain this a bit more to someone whom is a chevy guy and has VERY little knowledge of the oil route of the 440 block.....
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Re: Any 440 block or crank failures with boost?
[Re: Wilde Racing]
#864056
11/28/10 12:06 AM
11/28/10 12:06 AM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
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Milwaukee WI
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These engines feed oil to the mains, rods, and cam bearings through the main galley.(pass side of block) There is a drilling from each main saddle into the main galley to feed the crank and cam bearings. The #4 main feeds the crank, 2 rods, the cam bearing, and both cylinder heads rocker gear. On a factory setup the cam bearing is not grooved, but has three holes to feed oil to the heads. The oil in this setup is only transmitted to the heads when the drillings in the camshaft are in time with the holes in the #4 cam bearing. This is great for the lower end, but limits oiling needed on a race valve trane. The "solution" comes in a few forms. The cam bearings are available with a groove, and camshafts come with #4 journal grooved. Both are bad solutions in my opinion, but when both are done, can be devestating to the oil supply to the lower end.
What I do, is install that cam bearing rotated so only the main to cam feed is open(blocking the drillings up to the heads) This oils only the cam bearing like all the others. Then from the valley area of the block, I drill through the head feed drilling- right into the main galley on both sides of the block. I cap the drilling with a 1/16" pipe plug. This supplies the heads with all the oil they need without starving a section of the lower end.
Last edited by TRENDZ; 11/28/10 12:10 AM.
"use it 'till it breaks, replace as needed"
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Re: Any 440 block or crank failures with boost?
[Re: TRENDZ]
#864057
11/28/10 12:22 PM
11/28/10 12:22 PM
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Joined: Dec 2005
Posts: 121
mid-mich
turboplymouth
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Posts: 121
mid-mich
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So the galley on the side of the lifters now feeds the heads. Am I reading that right?
'72 Scamp, 3500#, 440, S400, blowthrough, meth. inj.
9.78 @ 139 so far at 12 psi, 11.00 @ 131 on real street tires.
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Re: Any 440 block or crank failures with boost?
[Re: turboplymouth]
#864058
11/28/10 09:21 PM
11/28/10 09:21 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
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master
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Milwaukee WI
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Correct. you must do this to both sides.
"use it 'till it breaks, replace as needed"
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Re: Any 440 block or crank failures with boost?
[Re: Defbob]
#864061
12/01/10 01:39 PM
12/01/10 01:39 PM
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Joined: Nov 2006
Posts: 2,260
IL
furious70
top fuel
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top fuel
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Posts: 2,260
IL
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Interesting, same day over on the C body dry dock an ex-police/fleet mechanic said they used to do the same thing to cruiser BB's to keep the oil where they needed it for sustained pursuit speeds.
70 Sport Fury
68 Charger
69 Coronet
72 RR
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Re: Any 440 block or crank failures with boost?
[Re: jrmopar1]
#864064
04/18/11 12:02 PM
04/18/11 12:02 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
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master
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Milwaukee WI
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The hole you drill through to the main galley is your restrictor... I drilled mine with a 1/8" bit. I suppose you could drill it any size you feel is needed. The tricky part is drilling and tapping the 1/16" pipe thread.
Restrictors are not usually installed to help the valve trane, they are installed to help the bottom end live. Alot of high end engines have EXTRA oiling to the top end to keep things up there happy.
Last edited by TRENDZ; 04/18/11 12:06 PM.
"use it 'till it breaks, replace as needed"
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Re: Any 440 block or crank failures with boost?
[Re: Wilde Racing]
#864066
04/22/11 06:16 PM
04/22/11 06:16 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
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master
Joined: Jan 2005
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Milwaukee WI
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32-36 psi hot @800rpm with 20-50 synthetic. This is with the milodon twin inlet long pump.
"use it 'till it breaks, replace as needed"
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Re: Any 440 block or crank failures with boost?
[Re: TRENDZ]
#864068
06/15/11 08:52 PM
06/15/11 08:52 PM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
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master
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Posts: 6,591
Canton, Ohio
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Quote:
These engines feed oil to the mains, rods, and cam bearings through the main galley.(pass side of block) There is a drilling from each main saddle into the main galley to feed the crank and cam bearings. The #4 main feeds the crank, 2 rods, the cam bearing, and both cylinder heads rocker gear. On a factory setup the cam bearing is not grooved, but has three holes to feed oil to the heads. The oil in this setup is only transmitted to the heads when the drillings in the camshaft are in time with the holes in the #4 cam bearing. This is great for the lower end, but limits oiling needed on a race valve trane. The "solution" comes in a few forms. The cam bearings are available with a groove, and camshafts come with #4 journal grooved. Both are bad solutions in my opinion, but when both are done, can be devestating to the oil supply to the lower end.
""
What I do, is install that cam bearing rotated so only the main to cam feed is open(blocking the drillings up to the heads) This oils only the cam bearing like all the others.""
Then from the valley area of the block, I drill through the head feed drilling- right into the main galley on both sides of the block. I cap the drilling with a 1/16" pipe plug. This supplies the heads with all the oil they need without starving a section of the lower end.
Im doing this mod right now, and found out that there is no way you can turn or flip that bearing to cut off the oil supply to the heads and just isolate the lube to the cam as stated. The bearings holes will still line up with either one side or the other.
To do that a seperate hole must be drilled.
Trendz, you must still have one bank assist feeding the heads. That should be okay as the oil will follow the path of least resistance and most of the flow if not all of it is still coming from the oil galley mod. mike
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Re: Any 440 block or crank failures with boost?
[Re: Sport440]
#864069
06/15/11 11:22 PM
06/15/11 11:22 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
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master
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Milwaukee WI
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Yeah forgot to mention that. The bearing in mine is turned and drilled. It's been awhile, but I think you can swap bearings with one of the others. If I remember correctly, there are 3 different sized cam bearings, and the two centers can be exchanged if you do this. I could be wrong though...
"use it 'till it breaks, replace as needed"
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Re: Any 440 block or crank failures with boost?
[Re: TRENDZ]
#864070
06/15/11 11:39 PM
06/15/11 11:39 PM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
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Canton, Ohio
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Quote:
Yeah forgot to mention that. The bearing in mine is turned and drilled. It's been awhile, but I think you can swap bearings with one of the others. If I remember correctly, there are 3 different sized cam bearings, and the two centers can be exchanged if you do this. I could be wrong though...
Just checked, they are all different diameters. I ended up drilling mine though too.
My Hats off to you for the idea and info!   
IMO, this should be a standard upgrade to any race block.
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I love it ! 
