Piston ring end gap too wide...

[Maximumtune30]

Hello
I have JE forged pistons with JE proseal rings, they have a 0.4mm minimum ring end gap I grinded one top ring gap too wide (about 0.65mm). Others are about 0.45-0.5mm. Is this anything to worry about, or should i just leave it as it is. Do i need to get new rings? This is a high compression NA engine with e85 fuel.

[hasa]

I would leave as is and send it.

[Maximumtune30]

Yeah, i put the bottom end together already. I staggered the ring gaps 180 degrees from each other.
i'll loose a hp or two, but i guess it's better than having a too tight gap and blowing your engine.
I feel kinda embarrassed that i overgapped the ring, but i don't think it will happen ever again ;)

[pshooter]

You would want .005" per inch of bore dia top and.0055 " per inch of bore dia 2nd
At minimum.

[hasa]

You would want .005" per inch of bore dia top and.0055 " per inch of bore dia 2nd
At minimum.

Yes as a thumb rule, but some piston manufacturers may recommend smaller values for N/A engine. Better read instructions of manufacturer as primary source of information.

[TobyB]

Unless I was racing in a very tight group, I'd use it too-

you're looking at a TINY loss in ring seal, at worst.

Far better than leaving it too tight!

t

[ADEN]

If you end up using it. Put the piston with the wider ring gap in no.6 more heat more expansion ;).

[Maximumtune30]

Yeah thats what i did