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Re: Bearing experts?? [Re: dvw] #2723096
12/10/19 09:57 PM
12/10/19 09:57 PM
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Since there is contact all the way around the whole bearing...

1 Had this been happening under power and or at RPM. That rod would be through the block. This is a low RPM occurrence,

2 the effected areas could just have less oil due to the delivery or from possibly bleed off.

3 The effected areas could also have less clearance...

Re: Bearing experts?? [Re: GTSocker] #2723113
12/10/19 10:49 PM
12/10/19 10:49 PM
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Oakville, Wa
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Originally Posted by GTSocker
I'm guessing you are starving for oil on deceleration. Maybe rethink your oil pan and pick up??


I run on some pretty long tracks. I wouldn't think that would be a issue. I am never on the brakes hard. I suppose its possible though


67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Bearing experts?? [Re: CoDart] #2723114
12/10/19 10:52 PM
12/10/19 10:52 PM
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Originally Posted by CoDart
Whats your engine/turbo combo? Sounds like its making some decent steam for sure!


9.5-1 500" RB factory block. Mopar VI heads. EFI precision 114mm turbo.. It makes more power than the factory block can handle.. I was surprised the main bearings look so good.


67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Bearing experts?? [Re: dvw] #2723116
12/10/19 11:01 PM
12/10/19 11:01 PM
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Originally Posted by dvw
These are my questions. Why would the #3/4 rod and #3 main be hit the worst? Is the main web cracked? If there was lack of oil feed to the #3 main the #5 rod should show wear as well. #3/4 are not last in line for oil. What was the bearing clearance? Are the journals round and straight? Is the crank cracked?
Doug

Those are all questions that I don't have answers for yet. I haven't lifted the crank out yet. I don't recall the clearances but they were plasti gauged when I built it and within spec. Didn't check every journal but checked a few.. I swapped bearings out back in 12' when It ate a piston. They looked like new then.. Only change is the oil pan. Ive ran the same single line Milodon plate added to the Melling HV pump. Square Pick up is about 1/2" to 3/4" off the pan floor.


67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Bearing experts?? [Re: HOTMOPR] #2723122
12/10/19 11:23 PM
12/10/19 11:23 PM
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Romeo MI
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How deep is your pan(measured) that PU is a long way off the bottom
wave

Re: Bearing experts?? [Re: MR_P_BODY] #2723126
12/10/19 11:31 PM
12/10/19 11:31 PM
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5.5" deep Shoot I'll go measure the pick up depth

Last edited by HOTMOPR; 12/10/19 11:37 PM.

67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Bearing experts?? [Re: HOTMOPR] #2723133
12/10/19 11:58 PM
12/10/19 11:58 PM
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Ya the pick up is just under 3/4" off the bottom. I cant go much lower do to the roundness of the bottom of the pan. Atleast not without mods. The sump measures 9" front to back and 13" wide. total pan depth from rail to bottom is 5.5". The sump is about 3" deep


67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Bearing experts?? [Re: HOTMOPR] #2723135
12/11/19 12:08 AM
12/11/19 12:08 AM
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Romeo MI
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Thats a long ways off the bottom.. I'd mod the pan so you can be no more than a 1/4"off.. you
could be sucking in air
wave

Re: Bearing experts?? [Re: MR_P_BODY] #2723139
12/11/19 12:32 AM
12/11/19 12:32 AM
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Oakville, Wa
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on it.. up


67 Barracuda, 470" B, Glide, FuelTech FT600, Precision, Ptc, QA1, Calvert, Smith racecraft, Afco, Dana 60. 275 radials
Re: Bearing experts?? [Re: HOTMOPR] #2723187
12/11/19 09:37 AM
12/11/19 09:37 AM
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Marion, South Carolina [><]
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Like DVW said, I'm interested to see if the crank passes the mag test.
The pickup needs to be a lot closer to the bottom of the pan.
Plastigage for checking clearances isn't even close. All it does is tell you if you have clearance or not, lol. Get a 2"-3" micrometer and a dial bore gauge.

Those Milodon sandwich plates aren't known for flowing real good. Not saying that's your issue, but I'd look into other options like using a Milodon cover on top of that HV pump.


CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
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