LA1
Well-known member
is it possible to over bore a small engine aluminum cylinder to the next size with a hone, maybe an Ammco hone (or other) , if so what model
Hone Help
- Thread starter LA1
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Zeke
Well-known member
I don't think so because an AL cylinder has a hard surface coating on it. You can lightly hone it to set new rings. However, if it has an iron liner, you can bore just a little. On the Porsches I worked on the iron liner was about an eighth thick and we could go one size over or about .030
With a stone hone it is, with a ball hone its impossible without doing a ridiculous number of passes. If you're asking because you want to do it you're better off just giving the naked block to a shop with a boring machine. The finished product will be much more accurate than what you can do by hand with a drill.
Only if you'r not careful
Cylinders become oval from the forces going from rotational to reciprocal. Honing offers no control in regards to keeping each cylinder parallel to one another (and centred to the crank) or in keeping it's own walls parallel for that matter. Rods have some side play on the crank journals and pistons have side play on the wrist pin but wonky cylinders will wear everything faster and lose efficiency and power.
VDubJoe
Well-known member
Only if you'r not careful
Cylinders become oval from the forces going from rotational to reciprocal. Honing offers no control in regards to keeping each cylinder parallel to one another (and centred to the crank) or in keeping it's own walls parallel for that matter. Rods have some side play on the crank journals and pistons have side play on the wrist pin but wonky cylinders will wear everything faster and lose efficiency and power.
Unless honing with a sunnen ridgid hone head or in a powerstroke type machine. Its time consuming, better to take it to a automotive machine shop . Shouldn't cost much.
Joe