Piston ring end gap too large, advise?

[fasterdamitt]

I am freshening up my 347 with a hone and new rings. Pistons still have .005 clearance as recommended.
I have Probe #10660-40 pistons and ordered Summit Racing's .040 rings to install. I went to measure the end gap on the top ring and came up with .030! The Perfect Circle used rings I just pulled have .020 gap currently! They started at .016 as recommended by Probe. Any suggestion on why new rings are measuring this way?

Thanks

Tom

 

[HotFox]

Tom,
They should have come with directions on recommended gap based on stock, n02, turbo/super charged should say like so many thousands per inch then multiply that by bore. Basically you need those directions. If it is a cast iron ring that does not sound out of line but without knowing the material who knows. Call Summit?

BTW nice Bronco! can you post a picture?
Scott

 

[fasterdamitt]

It's a moly top ring, I can't imagine .030 as a recommended ring gap. I think the package said factory gap which I am not close to at this time. I'll have to look when i get home.