Rb20det rebuild can i reuse these pistons?

[Owen rb20]

I'm doing a rebuild on my rb20det for drifting and found out once I pulled and cleaned my pistons that they seem pretty beat up they have light indentations on the piston head which looks like is from something that got in the intake and bounced around in the cylinders since the guy I bought the car from didn't have a proper intake filter on the indentations look worse on the exhaust side of the head and are on all of the piston heads I was wondering if it would be ok to reuse them since new ones look expensive I dont have a large budget and wont be making more then 300hp. I included pictures of the piston heads down below.


https://drive.google.com/file/d/13RBqim ... sp=sharing
https://drive.google.com/file/d/1OKjRCA ... sp=sharing
https://drive.google.com/file/d/11rvkvl ... sp=sharing
https://drive.google.com/file/d/10cj-cL ... sp=sharing
https://drive.google.com/file/d/1l9_Fnk ... sp=sharing
https://drive.google.com/file/d/1yvuAxc ... sp=sharing

[THE240guy]

I would always suggest replacing when there is any type of damage but in the since of a "drift" car i would try and ever so slightly soften the hi knicks and scratches install new rings and send it. I say in a "drift" car because the likelihood of pulling the motor again after the season is typical. Save up and replace them next time.

[VStar650CL]

That looks like detonation damage. On 3- and 4-valve engines where the spark plug straddles the intake valves, it's common for the pits and gouges caused by detonation to localize at the base of the valves. I don't see a lot of "buckshot" pitting on the other portions of the crowns, so check the pitted areas with a straightedge and measure the ring lands directly underneath it for uniformity. If the lands are uniform and there's no "hump" in the crown indicating the area has overheated and deformed, the pistons are probably okay to clean up and reuse. However, make sure your knock sensor is good, and watch the timing on your tune. Either a bad knock or overly-aggressive timing is probably what caused the pitting in the first place.