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#1 |
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Join Date: Dec 2009
Location: Kingman, NW AZ. in the middle of the longest stretch of Route 66
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am going to redo an old SBC which had a Lot of bearing clearance [3 on R & 3.5 on M, 50 wt oil 90lbs PSI OLD]
crank is std - clearance. I want to turn it 10-10 and start new. what is the best clearance for a race engine, good rods, 7K max. no more high PSI or heavy oil. Cleavite P bearings Thanks Rod in AZ |
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#2 | |
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![]() Quote:
I'm pretty confident if you can get your Main and Rod clearance's between .002 to .0025 you should be in a good zone. Running to 7500 rpm with 5/ 30 wt. oil 60 to 70 lbs. of oil pressure will also be safe. Have a good day, also have the crank magged for cracks before having any work done is also a good idea. Respectfully, Henry Kunz 1534 H/SA |
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#3 |
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clevite H series bearings r a good thing too. be aware the H series rod bearings r marked for upper/lower orintation.
Last edited by richie 2; 04-18-2024 at 12:29 PM. |
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#4 |
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What Henry said is spot on, that’s exactly what I shoot
for clearance and pressure wise, things are happy there and will give good performance and longevity!
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Ron Mattson 5015 STK |
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#5 |
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I like 0.002" on the rods, and 0.0025" on the mains, and I prefer the King bearings. If you go higher than that on clearance, you probably need to use thicker oil, ie. 20W50.
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Alan Roehrich 212A G/S |
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#6 |
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Join Date: Dec 2009
Location: Kingman, NW AZ. in the middle of the longest stretch of Route 66
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thanks all for the help. funny to think back on how ideas used to be. you can just imagine the cam/dist gear milling away trying to turn an oil pump shimmed to pump 90 lbs.!!
Rod in AZ |
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