Rings won’t fit in grooves on pistons.. HELP!

[Oldmanmopar]

Get new pistons and rings. technology today is just better.

 

[Max1196]

WTF. I gota research that. Looks tasty.

 

[67charger383]

Get new pistons and rings. technology today is just better.

View attachment 1716029855

View attachment 1716029856

View attachment 1716029857

I should just get a whole new motor, huh?

Lol every part on this motor is 40+ year old speed parts.

I know the new stuff is better but It’s a period build and I’m following a build from a old book.

 

[Dana67Dart]

Thanks everyone. I ordered the 1/16 rings and they should be correct

Did you measure the ring channel on your pistons?

If the new rings are not right it is just more cash and wait time spent.

"Measure twice cut once"

If you don't have a caliper you need one.

You can get one from harbor freight, cheap, that will do for most things.

 

[Bewy]

They look like old TRW forged pistons, L2293 & they take 1/16, 1/16, 3/16 rings.

 

[1968rt]

2293(383 domed piston) 765g plus a 250g pin.

 

[Dan Georgino]

I’m partway through building the bottom end of my 383. I was just about to gap the piston rings but when I test fit them they won’t go in the grooves on the pistons…

Do I need special rings or something? 30 over TRW L2293 dome pistons and Hastings 30 over moly rings.
View attachment 1716029738

View attachment 1716029739

You need new pistons, don't use the same old ones.

 

[6PakBee]

Good Lord, a check with a feeler gauge will answer this question of what size the ring grooves are.

 

[Tooljunkie]

No...

I knew a fellow that had a basement full of piston blanks. Made pistons to order. How do you think those grooves got there in the first place? Not debating this, there are different ways to an end goal.

 

[Bakerlite]

I knew a fellow that had a basement full of piston blanks. Made pistons to order. How do you think those grooves got there in the first place? Not debating this, there are different ways to an end goal.

Cutting ring lands in new pistons, is practical,obviously.
Recutting all the lands in a piston you can easily get rings for is not very practical.
But, if it was Sunday morning, you had a lathe, had the rings , weren't concerned about the friction increase from those bigger rings and just wanted to get the engine going, then I can understand why you'd give it a whirl.
I machined the inside face of some rings for a guy once so they would go into some shallow ring lands. Apparently the correct rings were not available and he didn't want to machine the piston lands.
That's what he wanted, so that's what I did. I didn't charge him, because I was interested in what the result would be.

 

[bbmopars]

You need new pistons, don't use the same old ones.

He doesn't need new pistons nothin the old school trw's. I have some L2185 426 max wedge trw pistons im using for 426 wedge im buildin.

 

[RustyRatRod]

Good Lord, a check with a feeler gauge will answer this question of what size the ring grooves are.

Just makes you wanna