Miata Turbo Forum - Boost cars, acquire cats.

- Engine Performance (https://www.miataturbo.net/engine-performance-56/)

- - Piston talk. (https://www.miataturbo.net/engine-performance-56/piston-talk-91140/)

I have a 1.6 Miata with a gt2560r turbo pushing around 12-15psi built head forged pistons. Fm link.

Now close to a week ago I was doing a few pulls and ended up melting a spark plug. Went home took the head off to see the damage and ended up chipping my piston and the walls are pretty scratch up on cylinder 3.

Now i I have a motor I'm building on the side but that won't be done until this summer. So my plan was to buy a block and new pistons but I have wisco pistons and really don't want to spend 500$ on a new set. I were looking at these https://thmotorsports.com/i-252768.aspx?utm_source=GoogleShopping&utm_medium=C SE&utm_content=252768NOFITMENT&utm_campaign=Google ShoppingSeanNOFITMENT&gclid=CjwKEAiA6YDBBRDwtpTQnY zx5lASJAC57ObMel2XgRkCght0TYnJ2MIhlcOUsK7mcLnDmze1 KpxGHhoCnibw_wcB
my main question is will these hold up? Also why do they look different from the pistons I have? Might sound like a amateur. They are cheaper than wisco and I'm just looking to get the car running before the summer.

Might sound stupid but someone said just use the 3 pistons and rods I have that are good and just buy one piston and that'll work out but I hear down falls about that.

Yeah dude, that block needs to come out. The cylinder walls are going to be toast in that cylinder, and it's likely there is bits of metal throughout the rest of the block.

Its not clear, but im pretty sure that's $120 per piston, not a set of four?

That engine is done. It needs a full bore and rebuild. were those forged pistons? If so, what brand?

I would start by figuring out why you melted a piston at 15psi from a GT2560R. The spark plug was collateral damage.

Quote:

Originally Posted by Savington (Post 1372915)

I would start by figuring out why you melted a piston at 15psi from a GT2560R.

Quote:

Originally Posted by Meanatta (Post 1372763)

Fm link.

I found part of it.

The rest is an ancient secret. Thai Ming.

I'd definitely have the injectors cleaned and flow tested while rebuilding the engine in case one is a little low on flow. That could cause it.

looks like a shit tune.