piston ring gap?

[bansheeryder21]

I am putting my motor back together and need to know a couple of things.

 

-what should the gap be on the piston rings? They are 66.5mm!

 

-what is the torque on the cylinders?

 

-what is the torque pattern on the noss head? I can't remember. I know it's something like 10, 15, and then 25in/lbs. Let me know the exact!

 

Thanks!

[bansheeryder21]

my ring gap is .011. is that good?

[Bansh-eman]

i want to say its like .004 per inch of bore but i cant remember if thats right...... read the papers that came with your pistons it should explain it...i know that weisco 64mm bore calls for .010-.012 so i went with .011..

 

i dont feel like going to get my clymers to tel you the pattern... but that sounds right ... just tighten them a little each with the criss cross pattern and then torque to right spec and it will be fine...

Edited April 6, 2007 by Bansh-eman

[64xracer]

Take 66.5 times .03937...that is 2.618. Then take 2.618 times .004 and that is how much ring gap you should have .01047. .011 is fine....run it!!!

[Ruko]

I think you meant 25 ft/lbs... 25 in/lbs is only about finger tight. I don't know about Noss heads but the torque for stock heads is 20 ft/lbs. Also it's better to be a little big on the ring gap, I set mine at 18-20... 12 is about the min. It's not really gona make any difference being a little bigger but if it's too tight you could end up with major problems. I've found it's best to use some sand paper over a small file instead of just a file when setting your ring gap. A file by itself can leave a burr on the edge of the ring end.