Piston to wall clearance is built into the pistons. For example, if you get .030 over pistons for your 350 Chevy the finished bore size is 4.030 no matter what brand or type. Forged pistons run higher. As much as .007. meaning the skirt will measure 4.023 , the bore 4.030. Always. Unless you ask your machinist for more clearance. In that case maybe +.032 over.
The clearance depends on a few different factors, a lot of my JB pistons requires 0.006-0.008 depending on how severe the power out put and application , I like to hone the blocks to 0.007 clearance
I have a 327 out of a 1968 Impala. The engine was stuck It turned out the second main bearing had moved about 1/8 of a inch just enough so the engine not rotate . Is there any precautions I should take before rebuilding my small block Chevy.
This is a stock cast piston, other types of pistons may require more clearance, always follow piston Manufacturer recommendations
Awesome video thanks 🎉🎉🎉❤
As always awesome video. Great to see someone doing it the right way
Thanks for sharing. I want to build a 350 and have been watching to learn.
Piston to wall clearance is built into the pistons. For example, if you get .030 over pistons for your 350 Chevy the finished bore size is 4.030 no matter what brand or type. Forged pistons run higher. As much as .007. meaning the skirt will measure 4.023 , the bore 4.030. Always. Unless you ask your machinist for more clearance. In that case maybe +.032 over.
The clearance depends on a few different factors, a lot of my JB pistons requires 0.006-0.008 depending on how severe the power out put and application , I like to hone the blocks to 0.007 clearance
Good Info! Thanks
I always run self clearancing pistons.
I have a 327 out of a 1968 Impala. The engine was stuck It turned out the second main bearing had moved about 1/8 of a inch just enough so the engine not rotate . Is there any precautions I should take before rebuilding my small block Chevy.
boom!
🐿️