Building an engine run stand.

[Power Hungry]

Originally Posted by cleatus12r

I spent some time today getting parts ready for the machine shop. Pistons are on the way along with headers and a cam.

Suppose .017" of ring gap might be not-quite-enough? Like most things I have here, if it was a good runner, it wouldn't be in the shed for my entertainment pleasure.

What did you end up running for Ring End Gap? Normally on a 4.360" bore with factory pistons and rings, I'd use about .025" - 0.028" for compression rings (maybe 0.028" - 0.030" on the 2nd ring) and .018" - 0.020" for oil ring.

For aftermarket stuff I just use whatever they recommend, especially for hypereutectic pistons. The expansion rate on those are slightly different then regular aluminum slugs.

*Technically", some specs only call for 0.004" per bore inch, so in those cases a 0.017" end gap would be considered acceptable. At the end of the day, I'd rather be a tad larger gap than too small. As someone mentioned:

If the gap is too big, only you will know. If the gap is too large, EVERYONE will know!