421 drag cub bore size question

[pitbull2424]

What up guys Thanks for all the info on this site always have found what I needed.

I am in need of some help that I can not find a clear answer .

So I took my motor apart to put in an override. I decided to look in my cylinders for an  inspection I noticed that my cylinders had Some aluminum deposit on the nickasil. so I decided to Scotch-Brite it out to see the cross hatches which are slightly their motor always ran really strong I was wondering if anybody could give me some info on what I should do. I took measurements and this is what I have on top of cylinder is 2.677 bottom is 2.677 top of piston is 2.66 bottom is 2.670 ring gap is about .020 I was thinking of putting it back Together but I don’t know if I messed up by removing the aluminum from the nickasil  will my ring still seat good or should I get new rings or new pistons and rings. Any info will be appreciated thanks .

[SKEETER]

RUN IT

[pitbull2424]

So you wouldn’t put in new rings? Even if to ring gap is at .020

[pitbull2424]

🤷‍♂️ No one else with info??

[registered user]

first off u measure near the piston bottom and its usually alot more than 1thou bigger than the top. if your numbers r correct , which i have my doubts, u have 7thou piston clearance which is a bit on the high side. 20thou ring gap is a bit high also. new stuff would b around 3thou clearance and 12thou gap

[SKEETER]

rUn iT

 

[trickedcarbine]

Can’t hurt to toss some fresh rings at it while you’re in there.