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Re: crankcase pressure/ blowing up valley pan
[Re: 440challenger]
#432726
08/09/09 05:18 PM
08/09/09 05:18 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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With 2 breathers I'm thinking he has broke some rings .... pull the breathers and run without them and see if the valley pan still bows up(push it down first) 
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Re: crankcase pressure/ blowing up valley pan
[Re: 440challenger]
#432727
08/10/09 10:47 AM
08/10/09 10:47 AM
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Joined: Nov 2003
Posts: 2,131
New Lenox IL
cudadon
top fuel
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top fuel
Joined: Nov 2003
Posts: 2,131
New Lenox IL
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Quote:
he was having alot of problems with pinging up around 4500 + . I set the timing at 36 total with the heaviest msd springs in the pro billet distributor. It still pinged BAD. He talked to someone and the guy put the timing at 31 degrees total,does that seem right ??????/
Guessing he did some damage to the motor when he was trying to get rid of the ping
What was the INITIAL timing (with no centr. advance)? What color bushing is with the springs?
Unless the the advance plate is LOCKED OUT you add initial + centrifical to get total timing.
Did you check timing @ idle and then @ 3200 rpm?
Don
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Re: crankcase pressure/ blowing up valley pan
[Re: MR_P_BODY]
#432728
08/10/09 11:05 AM
08/10/09 11:05 AM
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Joined: Jun 2009
Posts: 705
Michigan
Hemiroid
super stock
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super stock
Joined: Jun 2009
Posts: 705
Michigan
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Quote:
With 2 breathers I'm thinking he has broke some rings
.... pull the breathers and run without them and see
if the valley pan still bows up(push it down first)
 It's probably is wounded and is pinging because it's burning oil. Are the plugs oil fouled?
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Re: crankcase pressure/ blowing up valley pan
[Re: MR_P_BODY]
#432732
08/12/09 01:56 AM
08/12/09 01:56 AM
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Joined: Dec 2005
Posts: 202
CA
62SAVOY
enthusiast
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enthusiast
Joined: Dec 2005
Posts: 202
CA
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Quote:
With 2 breathers I'm thinking he has broke some rings
.... pull the breathers and run without them and see
if the valley pan still bows up(push it down first)
Is he running the breathers into the exhaust with the check valves? He may have had them go bad. I had it happen on my car. Street driven and bulged 2 pretty close back to back time frame. Took the breather hoses and went to free air. Been fine ever since. Mr. P Body did tell me in another post on this to check the check valves and the tubes that go into the exhaust to confirm there is no problems there.
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Re: crankcase pressure/ blowing up valley pan
[Re: qwkmopardan]
#432733
08/12/09 03:07 AM
08/12/09 03:07 AM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOrk !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
Put a nerf football between valleypan and bottom of intake and it will keep from inverting the valley pan.
A nerf football? ... 
This gives the term "band-aid"(the words typically given to the iNfamous pinion-snubber) ... NEW meaning !! ... 
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Re: crankcase pressure/ blowing up valley pan
[Re: 62SAVOY]
#432735
08/12/09 07:51 AM
08/12/09 07:51 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:
Quote:
With 2 breathers I'm thinking he has broke some rings
.... pull the breathers and run without them and see
if the valley pan still bows up(push it down first)
Is he running the breathers into the exhaust with the check valves? He may have had them go bad. I had it happen on my car. Street driven and bulged 2 pretty close back to back time frame. Took the breather hoses and went to free air. Been fine ever since. Mr. P Body did tell me in another post on this to check the check valves and the tubes that go into the exhaust to confirm there is no problems there.
Just for terminology, when a person says breathers
I take that to be it is venting to atmosphere and
if its hooked up to the exhaust I call that a evacuation
system and in this case he stated breathers
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Re: crankcase pressure/ blowing up valley pan
[Re: emarine01]
#432736
08/12/09 12:25 PM
08/12/09 12:25 PM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOrk !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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Quote:
I think proper cyl wall fiinish to ring choice is one of the hardest parts of engine building, done right makes major power done wrong makes for lots of blow by, I think thats what makes some builders combos run stronger than others with the same specs, Nerf football....? 
OMG ....x2 ... x100 ...
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Re: crankcase pressure/ blowing up valley pan
[Re: dOrk !]
#432737
08/12/09 06:30 PM
08/12/09 06:30 PM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 12,675
Columbia, CT
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What is the rest of the engine? Heads, pistons, etc. 36° is a ton of timing for a long stroke big block. Ping can be an issue if too small a cam is used, and once the detonation starts, parts start to change shape. It destroys the rings and the ring lands in addition to blocks and bearings. Are there any pictures of the bores during assembly? It's not hard to see if it's too rough. Too rough means oil contamination in addition to larger ring gaps after they seat... lots of posibilities. Also, no reason to not run a pcv. which might have helped a little anyway.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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No evac on this,just two breathers
thats something I never thought about, my breather pipe nipple is kinda close to the baffle, we run a header evac so there is negative pressure helping relieve crankcase pressure but the amount of space in between the too can cause a bottle neck in the crankcase, I would think that rpm and cid would effect the space needed?
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