Acid190

I joined to literally just ask this question. What is the lifespan of stock sleeves with forged high compression pistons?

Extra info:

Got a rod knock a while back, don't have a garage so I have to pay someone to do the rebuild, was going to put in forged high comp pistons but then read that they will eat my stock sleeves, but every single person I am reading on is talking about force fed motors and I NEVER plan on boosting mine. It's my daily, so all I was going to do was the pistons and some cams and call it a day. Any thoughts on this? compression ratio vs cams/which profile to get? Or milling the head instead? etc??? Really sorry if this has been answered, but I really cannot find it anywhere on the net.

JRCivic1

The only forged piston choice for a stock sleeved H22 or H23 block is the Mahle Gold Series piston. You can get OE H22 Type S pistons and they will work just fine if you intend to stay N/A. The Mahle Gold's will work well N/A, with Nitrous or Turbocharged.

Tachi

The nahle pistons are coated...coatings wear away. But the type-s pistons only give you a half point of compression.

Aradin

He said H23A1, not JDM H23A. The Type-S pistons will give him much more than half a point. He would be over 12:1 with them with the stock rod length. Could go with an H23/F22 eagle H beam with a .864 bushing so they were compatible with the Type-S pistons. Should be good for about 400whp if the ring gap is a little loose and good fuel is used but he said no boost so that's moot.

But I agree on the Mahles. If you buy them, you are wasting your money because they will wear out and cause massive blowby/ring seal issues. The coating is only temporary and unless the P2W is absolutely perfect it's going to get worn off very quickly. Most engines with Mahles only last about 30k TOPS if you're lucky before having to be torn down and rebuilt...again.

Acid190

Aradin: For the Mahles, that's exactly what I've been reading, do it right or do it twice. But again, that was all for force fed. That's a great idea with the Type-S pistons and rods though. I think I am going to leave the motor alone for now though and just let the stock rebuild happen. I'll just buy a block and build it while I drive on stock and then swap. Oh and ............. what's "moot"?