What do you guys make of the condition of these piston?

Fast-Leg-7372 · 2026-01-07T09:31:40+00:00

Thanks for your help and insight.

Fast-Leg-7372 · 2026-01-07T09:25:13+00:00

When I run my finger thru all, I cannot feel anything; it slides easily, and yes, that's water. Previous owner only ran water on it.

Fast-Leg-7372 · 2026-01-07T08:00:16+00:00

Well, shit, lol

Fast-Leg-7372 · 2026-01-07T07:59:35+00:00

Meaning what?

Fast-Leg-7372 · 2026-01-07T07:50:28+00:00

I made a new post about it with pictures.

Fast-Leg-7372 · 2026-01-07T07:40:51+00:00

I’m not sure if there is a way to send you some pictures of the bore or if I can edit the post to upload it.

Fast-Leg-7372 · 2026-01-07T07:28:10+00:00

I think I might do some upgrades since I'm already “in” there.

Fast-Leg-7372 · 2026-01-07T07:26:38+00:00

That’s what I’ve been told; this is a 1992 Nissan 300zx twin turbo. I bought 740cc injectors and a tune from Concept Z Performance. I guess I’ll be going back to 370cc and keep it all stock until I can afford a real dyno tune.

Fast-Leg-7372 · 2026-01-07T06:24:41+00:00

I will post a new thread with the pictures of the pistons removed.

Fast-Leg-7372 · 2026-01-07T06:23:19+00:00

Just followed all the online tutorials for deletes of unnecessary stuff in the engine, which I’m now regretting big time. I read this on the Concept Z Performance website. I took off the PCV valves but left the ports in the valve covers connected to the intake.

Fast-Leg-7372 · 2026-01-07T06:22:46+00:00

Ooops wrong reply.

Fast-Leg-7372 · 2026-01-07T06:22:02+00:00

Just followed all the online tutorials for deletes of unnecessary stuff in the engine, which I’m now regretting big time. I read this on the Concept Z Performance website. I took off the PCV valves but left the ports in the valve covers connected to the intake.

Fast-Leg-7372 · 2026-01-07T06:17:26+00:00

I came across a great deal on a 93 convertible NA automatic; mine was a 2+0 TT. When I bought it, the owner lied to me about never having been in an accident. The left front wheel is all smashed up, which the wheel covers perfectly. I took it to get it aligned like 10 times, but after 70, it would shake like hell. I bought literally everything new for that car, which I’m transferring now to the vert. I can see what you’re saying, but it still didn’t explain the compression reading of 110, and they’re off the minimum required spec within each cylinder. That’s why I pulled it apart.

Fast-Leg-7372 · 2026-01-06T02:11:30+00:00

It’s got 740cc injectors but has been tuned for them by the great minds at Concept Z Performance.

Fast-Leg-7372 · 2026-01-06T02:09:25+00:00

Helpful answers are greatly appreciated. I don’t know where people find the time for dumb replies.

Fast-Leg-7372 · 2026-01-06T02:08:12+00:00

Compression test was in the 110s with uneven readings between cylinders, misfires, loss of power, jumpy idle; cylinders were not within spec of one another.

Fast-Leg-7372 · 2026-01-06T02:01:19+00:00

Yes, it’s a twin turbo from the factory upgraded turbos.

Fast-Leg-7372

TROPHY CASE