Piston ring gapping

[haggis]

Hi, I'm rebuilding a late mk2 Vitesse engine to go on my gt6, having had the machine work done on the block I'm a little confused about the ring gapping, it would appear I have gaps of .45mm in the rings on the cylinders, the technical books I've read basically say max .30mm can anyone confirm these sizes for me? Machine shop says that they are as good as the quality of the rings (county) and not to worry, (they would say that)

Any feedback greatly appreciated.

 

Hag

[steveweblin]

I assume you mean the compression rings.  I think there is a lot of nonsense talked about some aspects of engine building.   http://www.diagnosticengineers.org/journal_%20articles/Ring%20Gaps%20vs%20Knowledge%20Gaps.php covers an explanation of some points not to worry about.

[Pete Lewis]

Steve,, Like that thanks for the link

 

good informative basics

 

Pete

[haggis]

Thanks Steve, interesting read. Machine shop, supplier and yourself have all said the same thing. I'll stick them in and see what happens.

 

Hag

[hugh]

Just bear in mind the bigger the gap the more blowby you will have, ring gaps should be measured half way down the bore on an engine that hasent a fresh rebore as the gap is always bigger at the top