Genesis Coupe Piston

[Sal Collaziano]

Apparently, this piston is hard enough to handle over 700 horsepower. Though it IS a little heavy at 342 grams...

 

[Turn In Concepts]

Do you know what material it is made from?

 

[EdVoylesHyundai]

That piston is cast aluminum.

 

[Turn In Concepts]

That piston is cast aluminum.

Sorry, should have been more clear. Do you know what aluminum?

 

[GeeK]

I'm curious to know as well. How are the rods and crankshaft? I'm dying to know what the stock shortblock is capable of. 223 on premium gas is NOTHING these days...especially, if you consider, the MS3, NSRT-4, CSRT-4 and Cobalt SS. All of these cars are putting down quite a bit more. BUT, all would be forgiven if these babies could handle 400-500whp stock. The next question would be: what can the turbo handle?

 

[Gadfly]

From the looks of that piston, the wrist pin will be a bit of a concern.

 

[Lisa.D]

The EVO X Pistons i hear are made by Mahle, who is a quality piston. So, if it's the same piston, i am sure it will be durable.

 

[Galen]

I really don't care who makes the piston. What I do care about is are they forged or cast. If they are not forged in a turbo motor, you are just asking for trouble. Detonation will absolutely kill any cast piston. I guess you can always hope the warranty covers it...but I wouldn't bet the house on it!

Galen

 

[John]

I really don't care who makes the piston. What I do care about is are they forged or cast. If they are not forged in a turbo motor, you are just asking for trouble. Detonation will absolutely kill any cast piston. I guess you can always hope the warranty covers it...but I wouldn't bet the house on it!

Galen

So Sti's were just asking for trouble then? Because the USDM ones didn't have forged pistons and there are a ton of people putting down good numbers on those

 

[Galen]

I have been building and racing 2.3 TurboFords for years. In a turbo car, detonation happens if you turn up the wick. While we all try to keep it a little rich and back the timing back to avoid this, it will eventually happen for one reason or another. Detonation will absolutely kill any cast or hypercracker pistons. Forged pistons are MUCH more resistant to breaking. To test this, take an old cast and forged piston and hit them with a hammer. The cast will tend to crack and the forged will absorb the impact. Detonation is basicly same thing.

That being said, the stock pistons in my heads/cam LS1 have taken many 150 shots without incident, but I also make sure it is rich and back the timing 6 degrees on the bottle. When I build a new motor it will absolutely have forged rods and pistons in it. It just doesn't make any since to skimp on short block parts.

Galen

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[slowboyy]

So Sti's were just asking for trouble then? Because the USDM ones didn't have forged pistons and there are a ton of people putting down good numbers on those

they did have trouble subaru tried to save money and used a cheap piston IN AND ONLY THE 07 STIS, thats if you check with alot of sti owner (me) they drop in a 04-05 sti shortblock

 

[Mark_888]

Do Hyundai aluminum engines have cast iron cylinder sleeves and piston rings? Or is it all aluminum?

 

[John]

they did have trouble subaru tried to save money and used a cheap piston IN AND ONLY THE 07 STIS, thats if you check with alot of sti owner (me) they drop in a 04-05 sti shortblock

They may have used a cheap piston in 07 but no Sti came from the factory with a truly forged piston. They were hardened cast pistons through whatever process they use. Ask any competent Subaru engine builder about it

 

[dboz]

Actually I think the STI had problems with the ringlands.

 

[bkprodigy]

I'm assuming the block design is semi-closed deck like evo X?
I can't see the picture at work :/

 

[bluetwo]

I can't wait either. There are a lot of opinions on the engine already. I guess it's ok that the first releases will be scooped up quickly and a lot of us will have to order the car we want.

Cast or not though, I'm glad I only plan on using the stock turbo.