pistons

[Cosme Tj]

I have Wiseco pistons did cut to them for the valves but was made them above a fissure of the piston will show to the photos
 the question to them is the following one
 I can use them with that fissure thus?
it did not harm to me?
or they recommend to weld the fissure to me

[Torben Alstrup]

That´s some serius notching 

Those pistons are for doorstops now.

T

[Fastbrit]

Expensive scrap... 

[BeetleBug]

Wow, deep pockets for sure.

I would have welded them and afterwards smoothened all the edges before I gave them a go.

[SSRT]

Gas port!
No problem, have used pistons with similar pockets before

[Udo]

I think you need some other pistons with a bigger head . I have welded this ones , it is not easy to weld but after i though about that it could work as a gasport ..

Udo

[Cosme Tj]

thanks for your opinions'll see what I do with the pistons as the grip so I do not know who would make them work well

[TexasTom]

I hate to say I don't think they'll work well for long.
The thinnest part of the cut will enlarge the hole and not work as a gas port so much as it will damage the ring and possibly the cylinder.
I think I'd look for a new set.

What size are the valves you're running? ... Just curious ...
Either way, Good luck!

[dangerous]

I would not "knowingly" fit a piston with a hole like that,
but I have disassembled a perfectly perfoming engine that had 'holed' there.

Since then I only notch to as deep as the first land is high,
and ALWAYS USE A RADIUS IN THAT LOCATION!!

I also set up a simple tool to measure the minimum thickness in other parts of the piston.

The way that notch has been done, it is likely that a piece will break away at some point,
so best would be start with a new set.

If you need more piston to valve clearance there are many other ways.

[Allen Wiess]

I hate to disagree with most, but run them............. they will be fine.  And yes, I have personally run them like that before without issue.

Allen

[Fiatdude]

J&E pistons -- already done from the factory  please notice how far down the first ring is