{"product_id":"supertech-forged-piston-kit-for-d-series-d16z6-88105cr","title":"Supertech Forged Piston Kit for D16Z6","description":"\u003cul\u003e\n\u003cli\u003eAdvanced 4032 alloy construction \u003c\/li\u003e\n\u003cli\u003ePhosphate dry lubricant coating \u003c\/li\u003e\n\u003cli\u003eWithstands 42psi turbo boost \u003c\/li\u003e\n\u003cli\u003eIncludes complete installation kit \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\u003c\/a\u003e\u003c\/li\u003e  \u003cli\u003e\u003ca href=\"#InstallGuide\"\u003eInstall Guide\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eSupertech Forged Piston Kit - 92-95 Honda Civic EX\/Si (EG) \/ 93-95 Civic del Sol Si (EG1) D16Z6\u003c\/h3\u003e\n\u003cp\u003eThe factory D16Z6 pistons are cast aluminum. Casting is cheap and works fine at stock power, but cast aluminum is brittle. Under boost, all it takes is a bit of detonation, and the ring lands crack or a chunk breaks off the edge of the piston crown. That's how most boosted D16s on stock pistons end up: one lean pull or one tank of bad gas, and you've got a cylinder with no compression. On top of that, the factory pistons give you about 9.2:1 compression. That's high for boost, so you have to run less of it before the engine starts knocking.\u003c\/p\u003e\n\u003cp\u003eThis Supertech kit fixes both problems. The pistons are forged, so they're tough enough to survive the occasional detonation that would crack a cast piston. They also drop compression to 8.8:1, so you can run more boost before knock becomes a problem. Supertech rates them for up to 42 psi on alcohol fuel. That's a rating for the pistons alone, though. Your D16's block, head gasket, and factory rods give out long before that. For a realistic street turbo D16, these pistons let you set boost with real margin to spare instead of just hoping it holds.\u003c\/p\u003e\n\u003ch4\u003e4032 Alloy: The Trade-Off\u003c\/h4\u003e\n\u003cp\u003eForged pistons mostly come in two aluminum alloys: 4032 and 2618. 4032 has more silicon, so it expands less as it heats up. That lets your machine shop run tighter clearance between the piston and cylinder wall. You get a quieter cold start, less piston slap, and rings that seal better on a street car. 2618 expands more and is a bit more forgiving of heavy detonation, which is why all-out race builds tend to use it. For a street turbo D16 that sees daily miles, 4032 is a good fit. Just tune it carefully, since it's less forgiving of detonation than 2618.\u003c\/p\u003e\n\u003ch4\u003eForging, Coating, and Finish\u003c\/h4\u003e\n\u003cp\u003eForging squeezes the aluminum into shape under massive pressure instead of pouring it into a mold. The metal's grain ends up packed tight and following the shape of the piston, so it's much tougher than a cast piston that's full of tiny voids. Supertech then CNC machines each piston. The skirts have grooves that cut down on contact area and friction against the cylinder wall. The pin bores are reamed and honed for an exact fit to the wrist pin.\u003c\/p\u003e\n\u003cp\u003eEach piston is phosphate-coated. The coating works as a dry lubricant, which helps the skirts during the first few seconds of a cold start before oil gets everywhere. It also keeps the rings from microwelding to the ring grooves under heat. That's when the rings pick up aluminum from the grooves, start sticking, and stop sealing.\u003c\/p\u003e\n\u003ch4\u003eWhat's in the Kit\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eForged 4032 pistons, 8.8:1 compression\u003c\/li\u003e\n\u003cli\u003ePiston rings\u003c\/li\u003e\n\u003cli\u003eChromoly wrist pins\u003c\/li\u003e\n\u003cli\u003eWire locks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBuild Notes\u003c\/h4\u003e\n\u003cp\u003eDon't drop new pistons into a block that hasn't been to the machine shop. Have the shop measure the pistons and bore and hone each cylinder to the piston-to-wall clearance Supertech specifies. Gap the rings for boost, too. Turbo engines need a wider top ring gap than N\/A ones, because the rings get hotter. If the gap is too tight, the ring ends can butt together and break the ring land. While the engine's apart, plan on stronger rods. The factory D16 rods are usually the next part to fail once you add boost. Your tune also has to account for the lower compression and the boost you're running.\u003c\/p\u003e\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1992-1995 Honda Civic EX and Si (EG) - D16Z6\u003c\/li\u003e\n\u003cli\u003e1993-1995 Honda Civic del Sol Si (EG1) - D16Z6\u003c\/li\u003e\n\u003cli\u003eD16Z6 engines only. Does not fit the 96-00 Civic EX (D16Y8)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cp\u003e92-95 Civic Si\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\n\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\u003cli id=\"InstallGuide\"\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n","brand":"Supertech","offers":[{"title":"Default Title","offer_id":69631467552802,"sku":"SPT-P4-HD755-N12","price":658.8,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/SPT-P4-HD755-N12_paur.png?v=1793811619","url":"https:\/\/www.hybrid-racing.com\/products\/supertech-forged-piston-kit-for-d-series-d16z6-88105cr","provider":"Hybrid Racing","version":"1.0","type":"link"}