Engine Bearings Failure (again) BBC 555CI, OFFROAD - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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  #16 (permalink)  
Old 04-20-2013, 01:26 PM
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all use wet sump in my competition, i also have 2 SBC with wet sump and the same use and they are ok, no problem, and the have stock pan and pickup.

Here is the Filter i use : http://www.summitracing.com/parts/mor-22459/overview/ , Here is the oil cooler and adapter http://www.summitracing.com/parts/tr...make/chevrolet
http://www.summitracing.com/parts/flx-45951/overview/

Will an oil acumulator help?, or it's worthless in this case?

Thanks Again

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  #17 (permalink)  
Old 04-20-2013, 02:37 PM
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Quote:
Originally Posted by TJ555 View Post
all use wet sump in my competition, i also have 2 SBC with wet sump and the same use and they are ok, no problem, and the have stock pan and pickup.

Here is the Filter i use : http://www.summitracing.com/parts/mor-22459/overview/ , Here is the oil cooler and adapter http://www.summitracing.com/parts/tr...make/chevrolet
http://www.summitracing.com/parts/flx-45951/overview/

Will an oil acumulator help?, or it's worthless in this case?

Thanks Again
it will help as the pump sucks air the oil psi drops the accumulator forces oil into the system..
your oil pick up needs to be moved.. to the back wall so on hillsit's covered in oil.. you should also open up the rear oil drain back holes as all the oils going out those..
you need to first off change from that oil you where use'n
then make a oil pick up that feeds from the back wall of the pan (picture in your head a vacuum thats sucks from the back pan floor and 1" up the rear wall.. that'll keep the pick up covered
next is getting the oil back down to the pan.. on the inclines one half the drain back holes are used..(the rear) clean these up..
toss the high volume pump. get a standard oil pump..

your problem is your pickup is placed in a spot thats sucking air on incline.. and the oil not returning fast enough..
on top of that a high vol oil pump is flooding the top end sucking the pan dry..
I'd get the 3 quart oil accuninator and plum it into the mains feed.. it looses oil presser the accuminator will feed the mains.. as a safety..
but you still need to fix the issues listed above..
dry sump would be ideal here but are not cheap.. but then again neither is that mussie bullet either..

ppull the pan put oil in it and hold it at the inclines you run at.. the lowest point is where you want that pick up.. and thats going to be the back of the pan where it goes from floor to rear wall..
you'll note that the pick up you have now is most likely no where near that area..
good luck..
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Old 04-20-2013, 03:33 PM
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If the pump were sucking air, the number 5 or 6 rod bearing would fail before a main.
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Old 04-20-2013, 04:43 PM
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Originally Posted by lmsport View Post
If the pump were sucking air, the number 5 or 6 rod bearing would fail before a main.
not always
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Old 04-20-2013, 08:43 PM
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the form of oil you are using, how much zinc and or other additional additives are in the oil?
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Old 04-21-2013, 10:12 AM
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Originally Posted by prumora1 View Post
the form of oil you are using, how much zinc and or other additional additives are in the oil?
Zn: 970-1150 ppm

http://www.liqui-moly.de/liquimoly/mediendb.nsf/gfx2/1390%20Synthoil%20Race%20Tech%20GT1%20SAE%2010W-60_EN.pdf/$file/1390%20Synthoil%20Race%20Tech%20GT1%20SAE%2010W-60_EN.pdf
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Old 04-21-2013, 10:45 AM
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Can you help me with a dry sump kit from the engine, i dont know all the parts i need to build it

Thanks
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Old 04-21-2013, 07:35 PM
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I was looking for parts to build a dry sump, and i have a couple of questions

between this 2 pumps, which one should i choose: 1)
http://www.summitracing.com/parts/mor-22244
2)http://www.summitracing.com/parts/mor-22344

i choose this tank because it have 10qt, it's ok? : http://www.summitracing.com/parts/ctr-23-110l

also this plate to block actual hole of wet sump pump: http://www.summitracing.com/parts/mor-23790

i dont know about brackets and pulleys i need, also about the oil pan, can i modify mines or i should buy a new one for the application?

Thanks
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  #24 (permalink)  
Old 04-22-2013, 10:09 AM
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Quote:
Originally Posted by TJ555 View Post
all use wet sump in my competition, i also have 2 SBC with wet sump and the same use and they are ok, no problem, and the have stock pan and pickup.

Here is the Filter i use : http://www.summitracing.com/parts/mor-22459/overview/ , Here is the oil cooler and adapter http://www.summitracing.com/parts/tr...make/chevrolet
http://www.summitracing.com/parts/flx-45951/overview/

Will an oil acumulator help?, or it's worthless in this case?

Thanks Again
An accumulator can be very helpful but may not have a fast enough reaction time if this is indeed is an issue of sucking air for a brief moment.

Things to check is the fit of the pickup tube where it enters the housing as well as its length for gaps and cracks. The pickup's strainer head on the pan end also needs to be checked for cracks and its position from the pan bottom which should be no closer than 1/4 inch (6-7mm) nor further than 3/8 inch (9-10 mm). If the tube has been welded of brazed to the housing check the housing for warpage and cracking as well. Also, inspect the relief valve spring to inusre that it works properly and that the valve doesn't hang up in its bore.

My pump prefrence is the Melling 10552C for its bolt on rather than press on pickup tube. I like to bracket the pickup strainer head back to the pump preferably to the mounting stud in the manner of the Milodon 18200 pickup. I also like the Milodon pump support bracket 17200. At sustained high RPM the pump really shakes to where breakage and cracking or vibrations opening up gaps to air injestion of the pump housing itself and/or the pickup tube is not uncommon. Use of the ARP pump mounting stud appropriate to the pump being used is a good idea. I'd also recommend saftey wire on all the pump fasteners.
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Old 04-22-2013, 06:11 PM
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Quote:
Originally Posted by TJ555 View Post
I was looking for parts to build a dry sump, and i have a couple of questions

between this 2 pumps, which one should i choose: 1)
http://www.summitracing.com/parts/mor-22244
2)http://www.summitracing.com/parts/mor-22344

i choose this tank because it have 10qt, it's ok? : http://www.summitracing.com/parts/ctr-23-110l

also this plate to block actual hole of wet sump pump: http://www.summitracing.com/parts/mor-23790

i dont know about brackets and pulleys i need, also about the oil pan, can i modify mines or i should buy a new one for the application?

Thanks
please help with dry sump
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  #26 (permalink)  
Old 04-23-2013, 07:41 AM
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A dry sump oil pan is required.
You need scavenge filters to protect the pump, inlet filter to protect the engine, probably need a cooler, and maybe a heater depending on race day weather, a pump drive kit, and a pump mounting kit along with the inlet adapter and oil tank.

I like Peterson Fluid Systems
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  #27 (permalink)  
Old 07-19-2013, 04:01 PM
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Problem

Problem persists, i buy and installed a aviaid dry sump system 4-stage, it works great, oil pressure is constant at any condition, but today i check my bearings and all main are starting to fail, i was using 10w40 and i just think about clearance, i was at 0.0025-0.0027, should i use 0.0035-0.0038?, what else can it be?

Thanks
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Old 07-19-2013, 09:44 PM
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if your clearances were to tight as it heated up it would start to slow down, how is this balanced. also have you checked you flex plate and damper for any loss of weight. what kind of damper are you running
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  #29 (permalink)  
Old 07-20-2013, 07:06 AM
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I use straight 50w oil in my engine.heavy oil has its applications,but clearances need to be adjusted. I agree with rechecking crank for straight. check all the mains with different combinations of caps in place,not just removing 1 cap to check run out.{2 random caps installed)
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  #30 (permalink)  
Old 07-20-2013, 11:09 AM
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Quote:
Originally Posted by TJ555 View Post
Hello , i have a edelbrock/musi 555 697hp engine, its a Big Block Chevy with DART BIG-M BLOCK, i have a problem with it, it keep failing main bearings, it's the third time in less than 3k Miles, i use this engine for offroading (hillclimbing in sand)

the engine see big load and like 6000-6500rpm for a long period, im using liquimoly 10w-60 oil, i was using clevite HNK Bearings, i was thinking it isn't too much clearance for aplication?, but i dont know how much is ok.

i was using the best fuel here in my country, 97 OCT, engine have like 9.8:1 compression
Not for nothing but 97 octane on a 700 HP Motor revving 6500 RPM may simply not be enough. I run both my Pro Street machines on C12 24/7, ok it gets expensive but for starters they run night and day better than on pump gas and the smell along is worth the extra money
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