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Am installing the piston rings on my 351C but am coming out with some numbers that are causing me some worry.
First engine I've ever built so not keen on what tolerances you can you slip by with but heres what I'm looking at.
It's a 351Cleveland bored to 4.03 (I'm running forged pistons). So I bought a pair of rings for a 4.03 bore off of summit, E251K .030 is the set the machine shop told me to buy. As I install these rings i'm getting numbers that are a little off from tolerances that are in my service manual and am not sure whether I need to worry.
Book says compression rings can be anywhere from .01-.02. Here's a chart of what the feeler gauge was giving me when I set the rings in the cylinder.
P1- P2- P3- P4- P5- P6- P7- P8-
Top Ring - .019 .022 .021 .018 .021 .020 .020 .023
Bottom ring- .022 .020 .022 .020 .022 .022 .020 .022
Now obviously some of these are out of tolerance from the standard book range .020 maximum.
So what do I do at this point, I'm not sure if machine shop is to blame or rings are sized wrong, or both?
Thanks.
First engine I've ever built so not keen on what tolerances you can you slip by with but heres what I'm looking at.
It's a 351Cleveland bored to 4.03 (I'm running forged pistons). So I bought a pair of rings for a 4.03 bore off of summit, E251K .030 is the set the machine shop told me to buy. As I install these rings i'm getting numbers that are a little off from tolerances that are in my service manual and am not sure whether I need to worry.
Book says compression rings can be anywhere from .01-.02. Here's a chart of what the feeler gauge was giving me when I set the rings in the cylinder.
P1- P2- P3- P4- P5- P6- P7- P8-
Top Ring - .019 .022 .021 .018 .021 .020 .020 .023
Bottom ring- .022 .020 .022 .020 .022 .022 .020 .022
Now obviously some of these are out of tolerance from the standard book range .020 maximum.
So what do I do at this point, I'm not sure if machine shop is to blame or rings are sized wrong, or both?
Thanks.