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Author Topic:   killing rod bearings
new8
Member
posted February 06, 2002 09:27 AM
I RUN A 350 SBC LATE MODEL WITH RPM 2500 6000.MY QUESTION IS ON NUMBERS 1 AND 3 ROD BEARINGS AFTER ABOUT 60 LAPS THEIR GONE,ALL THE OTHERS ARE FIND ALSO THE MAINS. I HAVE 1/8 HOLES DRILLED IN THE MAINS DIRECTED TOWARD THE BOTTOM OF THE PISTONS FOR COOLING,I ALSO RUN A HI-VOLUME AND HI-PRESSURE OIL PUMP? SO CAN ANYONE EXPLAIN THIS TO ME PLEASE.
THANKS FOR THE INFO.


Donnie Ross
Member
posted February 06, 2002 06:55 PM
how and where did you drill the mains? why?
was there a problem with pistons?maybe you are starving for oil on those journals, how is the crank? what do the bearings look like
beaten to death melted etc? maybe we can help with a little more info.what was oil temp?


new8
Member
posted February 06, 2002 08:06 PM
quote:
Originally posted by Donnie Ross:
how and where did you drill the mains? why?
was there a problem with pistons?maybe you are starving for oil on those journals, how is the crank? what do the bearings look like
beaten to death melted etc? maybe we can help with a little more info.what was oil temp?


yes** first i drilled the holes in the main saddles,the crank is beaten to death,and my oil temp whent up to 340.
thanks


new8
Member
posted February 06, 2002 08:07 PM
quote:
Originally posted by Donnie Ross:
how and where did you drill the mains? why?
was there a problem with pistons?maybe you are starving for oil on those journals, how is the crank? what do the bearings look like
beaten to death melted etc? maybe we can help with a little more info.what was oil temp?


yes** first i drilled the holes in the main saddles,the crank is beaten to death,and my oil temp whent up to 340.
thanks


Monster
Member
posted February 06, 2002 08:21 PM
A 1/8" hole to cool the pistons is a HUGE oil leak! I've only seen this trick done on turbo motors where the piston crown is subjected to an intense "soaking" heat load, and the benefits outweigh the resulting degradation of oil control. Even when they do it, carb jets are used to restrict the flow of oil and aim it. I would tell you to plug those holes up, a 6000 rpm circle track motor does not need them. The engine is oiled from the back towards the front. Your front rods are starved of oil.


new8
Member
posted February 06, 2002 08:46 PM
quote:
Originally posted by Monster:
A 1/8" hole to cool the pistons is a HUGE oil leak! I've only seen this trick done on turbo motors where the piston crown is subjected to an intense "soaking" heat load, and the benefits outweigh the resulting degradation of oil control. Even when they do it, carb jets are used to restrict the flow of oil and aim it. I would tell you to plug those holes up, a 6000 rpm circle track motor does not need them. The engine is oiled from the back towards the front. Your front rods are starved of oil.

yes i was thinking the same thing but now i know for sure,thanks for the info.


new8
Member
posted February 06, 2002 08:47 PM
quote:
Originally posted by Monster:
A 1/8" hole to cool the pistons is a HUGE oil leak! I've only seen this trick done on turbo motors where the piston crown is subjected to an intense "soaking" heat load, and the benefits outweigh the resulting degradation of oil control. Even when they do it, carb jets are used to restrict the flow of oil and aim it. I would tell you to plug those holes up, a 6000 rpm circle track motor does not need them. The engine is oiled from the back towards the front. Your front rods are starved of oil.

yes i was thinking the same thing but now i know for sure,thanks for the info.


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