65Mm Pistons - Ie Stock Bore For An New Rb26 Block

[Jazzadub]

So I imagine that the original issue was that the rings were never bedded in correctly?

I suppose this is testament which proves the "get load on the engine ASAP" run in method.

What run in method was originally used?

[djr81]

Glad to hear you have it under control!

I'll be interested to see how mine goes if/when I get down to Collie, venting the sump seems to make all the difference

I think nearly everyone will be - if only because I can now stop sulking about it.

So I imagine that the original issue was that the rings were never bedded in correctly?

I suppose this is testament which proves the "get load on the engine ASAP" run in method.

What run in method was originally used?

Possibly to probably. Certainly the original engine had far too much blowby which is usually an assembly issue and given the workshop who built it specced it, installed it, fired it up and ran it in - if it wasnt an assembly issue then it is/was still their issue. By the time I got to confirming how it was all done I was so far over talking the said workshop and generally dealing with their &^%$ I never did ask.

For what it is worth having spoken to a number of other engine builders and to Pacific Engine Parts themselves the CRC + drive it on start up (ie dont let it sit at idle) is the way I would be doing all engines in the future.

Also for wha it is worth I rechecked on the oil return diameters in the old block. They are 8mm which is slightly larger than the head. The head got drilled to match the block - which is porbably a mm or so smaller than most people do. Anyway those five returns probably add up to well under half of the total return area.

Edited March 24, 2014 by djr81

[djr81]

Cant remember if I posted this, but anyway, here it is again.

1160_001.pdf

[r33_racer]

Winner Winner Chicken Dinner!