Visit The Dirt Forum for More Information

Author Topic:   clearances
nailngoracing
Dirt Maniac

Total posts: 170
posted February 06, 2005 09:36 PM  
small block chevy....all

min-max...for circle track engines

rico 08
Dirt Forum Champ
Total posts: 1139
posted February 07, 2005 06:29 AM  
.002 rods and .0025-.003 mains
i usually shoot for those numbers

leapinlizard
Dirt Freak

Total posts: 402
posted February 07, 2005 10:47 AM  
I like .0025 for rods and .0027 for mains with a wet sump engine.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted February 07, 2005 11:34 AM  
a good rule of thumb is .001 for every inch of shaft diameter + up to .0005 for extra margin of clearance if you feel you need it. On a standard SBC that gives you .0025-.003 on the mains and .002-.0026 on the rods. If you are using thinner oil you will want to stay on the tighter side to keep oil pressure up. You have to be careful not to get too tight or too loose. The load capacity and cooling of the bearing suffers if you go too far one way or the other.

nailngoracing
Dirt Maniac

Total posts: 170
posted February 08, 2005 06:30 PM  
how about side clearances.(rods)

goinrcn44h
Dirt Freak

Total posts: 205
posted February 08, 2005 11:10 PM  
.018" from what the book says I do believe.

Back to the Archives