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#1
10-15-2022, 06:24 PM
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Main/ Rod bearings
I am pulling my motor on my road race/ street car to upgrade the oil pan and add oil drain backs to the heads. Its a 400 based 463. My question is what bearings are people using these days. Its been a while since I've freshened up thus motor so I'm taking advantage when it's out.
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#2
10-15-2022, 07:28 PM
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Does your crank have 3” mains, or 3.250” mains.
If it’s 3” aftermarket and not double cross drilled on the number 2 and 4 main then just as when stock from the factory you should run fully grooved main bearings If your running a aftermarket 3.250” crank then you should double check that it’s cross drilled and then run grooved upper bearings and non grooved lower for added oil film and crank support.
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I do stuff for reasons. |
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#3
10-15-2022, 07:39 PM
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Clevitte77 are definitely the most consistent as far as oil clearance goes. King and Speed Pro bearings are great also.
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| The Following User Says Thank You to PAUL K For This Useful Post: | ||
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#4
10-16-2022, 11:26 AM
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Some will also depend on you crank actual diameter. Clevite STD vs King STD vs a King 0.001 are all different on mine
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
| The Following User Says Thank You to Skip Fix For This Useful Post: | ||
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#5
10-16-2022, 04:33 PM
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It's an eagle 4.25 stroke crank, 3" mains. Ill have to look if it is double cross drilled. The crank has never been turned and was in spec when I assembled the engine. It should not need to be ground but I'll make thar decisions when it is pulled and I mic it
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#6
10-16-2022, 05:53 PM
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I use SP 113 for the mains or 4040 which are 0.001" under. 7050 CH for rods. I use Calico to coat the bearings and you can tighten up the clearance a bit if needed.
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1967 Firechicken, 499", Edl heads, 262/266@0.050" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. 10.01@134.3 mph with a 1.45 60'. Still WAY under the rollbar rule. |
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