Birdoprey

iTrader: (7)

Just wondering if anyone is running Hypereutectic pistons in their 400+whp N/A motor'd cars? Any issues? Is it daily driven or ?

Thanks,
-mark

KENS96M6

I was running the factory hyperutectic (Male) at 398RWHP and over 530 on spray with no problems. Pistons and rings looked fine on teardown. Not something I would recommend if rebuilding/using n2o but it worked for me on the factory shortblock.

stevo9389

i believe my friends 383 has hypereutectic with with about 420ish and no problems. he refuses to spray it tho. it has been daily driven and raced a little

gatorhead

iTrader: (4)

They can handle NA and small shots of spray, not something I would want to throw a huge shot at, but for NA they are great and lightweight to boot!

JessieT

Hyper-Eutecticdumare these pistons type stock in ls motors?

Nitemare281

I've had 430RWHP N/A with hypers. If the tune is good, I trust them. I wouldn't trust them much more than that though, personally.

bowtienut

iTrader: (1)

Stock hypers here. 425 SAE rwhp. 12:1 CR. Not daily driven, but driven occasionally and lots of track runs. Going on its 4th season.
With pump gas in it, I watch it closely, never let it get hot if I'm gonna run it hard. It usually has a mix of pump and race gas.
It will be doing some roadcourse action this year, and I'll definitely have better than 93 octane in it for that.

530 rwhp on the 100 shot. I've sprayed it probably only 20 times.

Like Nitemare said.....IF THE TUNE IS GOOD !!!!

Ed Wright

iTrader: (1)

I was over 530 rwhp NA with them. No problem.

Boosted Firehawk

iTrader: (11)

YUP. stock lt1 motor with a 250 shot running low 10s all day with over 200 passes on it.

Ed Wright

iTrader: (1)

Who is the alchemist, and for what is he blaming Royal Purple oil?

RamAir95TA

iTrader: (2)

I'd use them even when this thread was posted 2 and a half years ago!

gjohnsonws6

iTrader: (12)

I wish they made the factory mahle in oversizes. I think it is a better hyper than the speed pros or kbs. I would run them if they did.