forged vs hyper pistons

[dcs13]

I have personally seen hyper pistons with the wrist pin pulled out of them.

I'd go with forged for peace of mind.

I have that trophy ! pulled the pin smooth out like a grenade. Took the block,crank, and some rods, and oil pan alnong the way. Forged only here now.

Any truth to the hyper's being more "brittle"?

[Rreemo]

I have that trophy ! pulled the pin smooth out like a grenade. Took the block,crank, and some rods, and oil pan alnong the way. Forged only here now.

Any truth to the hyper's being more "brittle"?

Another point to consider....don't use cheap forged pistons either. I have a forged TRW out of a 468 BBC that broke exactly the same way as the one pictured above....pulled the pin out of it.

[silverhatch]

I don't care what some slide rule engineer deems acceptable to get emissions down and a high percentage of engines out of the warranty period. If it's a hot rod engine, and you want it to be tough, put forged pistons in it. Even if it's n/a for now, you might want to do something more fun with it later and you won't want to regret your cheapass decision.

Well said.

[jyro]

one little leanout and this, long ago

anything cast is more brittle then forged
I kept it all these years just incase I ever thought about buying another set.

[SS Junk]

There is absolutely no need to go forged for pistons if staying N/A.

interesting....there weren't forged in the Grand Nationals either..... I was told they don't need them by GN guru's when we looked at rebuilding our shortblock. They told me to get the tune right and forged weren't needed.

Are you planning rebuild of your Miata motor?

I don't have a Miata, but for the rest, you are completely correct. I know of many SC's well north of 400rwhp using the stock block. The tune is where it's at.

[racrguy]

There is absolutely no need to go forged for pistons if staying N/A.


I don't have a Miata, but for the rest, you are completely correct. I know of many SC's well north of 400rwhp using the stock block. The tune is where it's at.

No need for forged pistons? Tell that to the block that I ventilated after yanking a wrist pin out at ~7500 RPM going down the back stretch on a 1/2 mile track.

[dcs13]

No need for forged pistons? Tell that to the block that I ventilated after yanking a wrist pin out at ~7500 RPM going down the back stretch on a 1/2 mile track.

Thats EXACTLY where mine let go...Devils bowl back stretch...

[racrguy]

Thats EXACTLY where mine let go...Devils bowl back stretch...

Mine was at what's now called Lonestar Speedway before it was shortened.

I'm not surprised you blew one up at the bowl. Up hill on the back, down hill on the front.

[Mach1]

Are you planning rebuild of your Miata motor?

Someday I will, right now I am just doing some homework on some spec miata type tricks, and also a CMC build (I know it's dyno limited).

[SS Junk]

No need for forged pistons? Tell that to the block that I ventilated after yanking a wrist pin out at ~7500 RPM going down the back stretch on a 1/2 mile track.

The details are overwhelming on the engine setup.

[Diabolic]

It is possible to run Hyper pistons and boost with reliability. I push 20#'s through mine and daily drive it. Had boost for a year and more than 20 bottles of nitrous before that with no issues. I have a 351 and what I consider a very conservative tune.

[Mach1]

Great hyper example is the mkiv supra, 1000hp, 30psi of boost, all day long.

[SC457A]

I always try and get parts that are a bit more than I need. My Datsun is way too stout parts wise, but it has lasted 12 years too and seen over a 1000 drag strip passes, a few "street miles" before I said, I am going to die or kill someone and made it a race car.

But Its still slow.. And It has a 250 shot of funny gas to make it less slow.

[46Tbird]

There is absolutely no need to go forged for pistons if staying N/A.
---
The tune is where it's at.

Cheap insurance. All it takes is a 105* day, subpar fuel, a slightly clogged filter, or a hotspot in the chamber to fuck up an entire engine. You stick with hypers, I'll spend another $2-500 to increase the SF by an order of magnitude.

[SS Junk]

Depends on the application and the tune and CR. Does said setup have a knock sensor?